Improve the Modbus TCP server

The 'modbus_tcp.c' file has been extensively rewritten to handle parsing TCP Application Data Units (ADUs), handling incoming Modbus requests, and generating appropriate responses. The modbus tcp server now interacts better with the LWIP TCP functionality, due to better utilization of the callback functions.

temp: modbus refactor

Applications/Qt-application_for_UDP_broadcast/about.cpp

@@ -1,15 +1,11 @@
 #include "about.h"
 #include "ui_about.h"
 
-About::About(QWidget *parent) :
-    QDialog(parent),
-    ui(new Ui::About)
-{
+About::About(QWidget* parent) : QDialog(parent), ui(new Ui::About) {
     ui->setupUi(this);
     ui->lblVersion->setText(ui->lblVersion->text() + " " + __DATE__ + " " + __TIME__);
 }
 
-About::~About()
-{
+About::~About() {
     delete ui;
 }

Applications/Qt-application_for_UDP_broadcast/about.h

@@ -7,16 +7,15 @@ namespace Ui {
 class About;
 }
 
-class About : public QDialog
-{
+class About : public QDialog {
     Q_OBJECT
 
-public:
-    explicit About(QWidget *parent = nullptr);
+  public:
+    explicit About(QWidget* parent = nullptr);
     ~About();
 
-private:
-    Ui::About *ui;
+  private:
+    Ui::About* ui;
 };
 
 #endif // ABOUT_H

Applications/Qt-application_for_UDP_broadcast/main.cpp

@@ -2,8 +2,7 @@
 
 #include <QApplication>
 
-int main(int argc, char *argv[])
-{
+int main(int argc, char* argv[]) {
     QApplication a(argc, argv);
     MainWindow w;
     w.show();

Applications/Qt-application_for_UDP_broadcast/mainwindow.cpp

@@ -1,107 +1,97 @@
 #include "mainwindow.h"
-#include "ui_mainwindow.h"
 #include "QUdpSocket"
+#include "ui_mainwindow.h"
 
-MainWindow::MainWindow(QWidget *parent)
-    : QMainWindow(parent)
-    , ui(new Ui::MainWindow)
-{
+MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
     ui->setupUi(this);
     m_udpSocket = new QUdpSocket(this);
     m_udpSocket->bind(QHostAddress::Any, UDP_PORT, QUdpSocket::ShareAddress);
 
-    connect(m_udpSocket, &QUdpSocket::readyRead,
-            this, &MainWindow::processPendingDatagrams);
+    connect(m_udpSocket, &QUdpSocket::readyRead, this, &MainWindow::processPendingDatagrams);
 
-    //Timer just to ask twice (udp)
+    // Timer just to ask twice (udp)
     m_timer = new QTimer(this);
     m_timer->setSingleShot(true);
     m_timer->setInterval(500);
-    connect(m_timer,&QTimer::timeout, this, &MainWindow::SendRequest);
+    connect(m_timer, &QTimer::timeout, this, &MainWindow::SendRequest);
 
-    //Send Request on startup
+    // Send Request on startup
     on_pbRefresh_clicked();
 
-    ui->devices->setIconSize(QSize(48,48));
+    ui->devices->setIconSize(QSize(48, 48));
     ui->devices->setContextMenuPolicy(Qt::CustomContextMenu);
 
     ui->comboBox->addItem("default");
-    ui->comboBox->addItem("192.168.69.10");         //test
-    if (ui->comboBox->currentText()=="default"){
+    ui->comboBox->addItem("192.168.69.10"); // test
+    if (ui->comboBox->currentText() == "default") {
         ui->ChangeOwner->setDisabled(true);
     }
 
-//    //Example items for screenshot:
-//    QListWidgetItem * item = new QListWidgetItem(QIcon(":/res/stm32.png"), "00:80:E1:05:44:21 @ 192.168.0.11 (John Doe)");
-//    ui->devices->addItem(item);
-//    QListWidgetItem * item2 = new QListWidgetItem(QIcon(":/res/rpi.png"), "E4:5F:01:05:44:21 @ 192.168.0.11 (Jane Doe)");
-//    ui->devices->addItem(item2);
-//    QListWidgetItem * item3 = new QListWidgetItem(QIcon(":/res/unknown.png"), "44:44:44:05:44:21 @ 192.168.0.11 (Juul Doe)");
-//    ui->devices->addItem(item3);
+    //    //Example items for screenshot:
+    //    QListWidgetItem * item = new QListWidgetItem(QIcon(":/res/stm32.png"), "00:80:E1:05:44:21 @ 192.168.0.11 (John
+    //    Doe)"); ui->devices->addItem(item); QListWidgetItem * item2 = new QListWidgetItem(QIcon(":/res/rpi.png"),
+    //    "E4:5F:01:05:44:21 @ 192.168.0.11 (Jane Doe)"); ui->devices->addItem(item2); QListWidgetItem * item3 = new
+    //    QListWidgetItem(QIcon(":/res/unknown.png"), "44:44:44:05:44:21 @ 192.168.0.11 (Juul Doe)");
+    //    ui->devices->addItem(item3);
     connect(ui->actionAbout_Qt, &QAction::triggered, QApplication::aboutQt);
 }
 
-MainWindow::~MainWindow()
-{
+MainWindow::~MainWindow() {
     delete ui;
 }
 
-void MainWindow::on_pbRefresh_clicked()
-{
+void MainWindow::on_pbRefresh_clicked() {
     this->func = 0;
-    SendRequest();    
+    SendRequest();
     m_timer->start();
 }
 
-void MainWindow::SendRequest()
-{
+void MainWindow::SendRequest() {
     int broadcasts_send = 0;
     int data_send = 0;
     QUdpSocket udpSocket;
     QByteArray datagram;
-    if(this->func == 0){
-        datagram = UDP_REQUEST"v1.0";
-        //Get all the Network Interface Cards of this Computer
+    if (this->func == 0) {
+        datagram = UDP_REQUEST "v1.0";
+        // Get all the Network Interface Cards of this Computer
         QList<QNetworkInterface> NICs = QNetworkInterface::allInterfaces();
-        foreach(QNetworkInterface NIC, NICs){
-            //Get all the adresses on this NIC
+        foreach (QNetworkInterface NIC, NICs) {
+            // Get all the adresses on this NIC
             QList<QNetworkAddressEntry> adresses = NIC.addressEntries();
-            foreach(QNetworkAddressEntry adress, adresses){
+            foreach (QNetworkAddressEntry adress, adresses) {
                 QD << NIC.name() << adress.ip();
-                //If broadcast adress = null => IPv6 (no support for broadcasts)
+                // If broadcast adress = null => IPv6 (no support for broadcasts)
                 QHostAddress broadc_addr = adress.broadcast();
-                if(!broadc_addr.isNull()){
-                    //Send UDP packet
+                if (!broadc_addr.isNull()) {
+                    // Send UDP packet
                     udpSocket.writeDatagram(datagram, adress.broadcast(), UDP_PORT);
                     broadcasts_send++;
                 }
             }
         }
-    }
-    else if(this->func == 1){
+    } else if (this->func == 1) {
         QHostAddress addr(ui->comboBox->currentText());
         udpSocket.writeDatagram(this->data, addr, UDP_PORT);
         data_send++;
     }
 
-
-    if(broadcasts_send == 0 && data_send == 0){
-        ui->pteLog->appendPlainText("Warning: no Network Interface Cards or valid IP adresses found (no broadcasts send)");
-    }else if(data_send != 0){
+    if (broadcasts_send == 0 && data_send == 0) {
+        ui->pteLog->appendPlainText(
+            "Warning: no Network Interface Cards or valid IP adresses found (no broadcasts send)");
+    } else if (data_send != 0) {
         ui->pteLog->appendPlainText(tr("Info: %1 message sent to %2").arg(data_send).arg(ui->comboBox->currentText()));
-    }else{
+    } else {
         ui->pteLog->appendPlainText(tr("Info: %1 broadcasts send").arg(broadcasts_send));
     }
 }
 
-void MainWindow::processPendingDatagrams()
-{
+void MainWindow::processPendingDatagrams() {
     QByteArray datagram;
     QHostAddress host;
 
     // just get rid of every host in the combobox, not pretty code, i know
-    if(this->func == 0){
-        for(int i = 1; i < ui->comboBox->count(); i++){
+    if (this->func == 0) {
+        for (int i = 1; i < ui->comboBox->count(); i++) {
             ui->comboBox->removeItem(i);
         }
     }
@@ -114,74 +104,69 @@ void MainWindow::processPendingDatagrams()
     }
 }
 
-void MainWindow::processDatagram(QString msg,QString host)
-{
-
-    //Append received data to log
-    QString logLine = tr("Van %1: \"%2\"")
-            .arg(host)
-            .arg(msg);
+void MainWindow::processDatagram(QString msg, QString host) {
+    // Append received data to log
+    QString logLine = tr("Van %1: \"%2\"").arg(host).arg(msg);
     ui->pteLog->appendPlainText(logLine);
 
-    //We receive our own request. So a check to see if it is the request:
-    if(msg.indexOf(UDP_REQUEST) != -1){
-        return; //we are done here...
+    // We receive our own request. So a check to see if it is the request:
+    if (msg.indexOf(UDP_REQUEST) != -1) {
+        return; // we are done here...
     }
 
     // add new host to select in combobox
-    if(this->func == 0){
+    if (this->func == 0) {
         ui->comboBox->addItem(host);
     }
 
-
-    //RegEx for MAC adress
-    QRegularExpression macRegExp("([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})");
+    // RegEx for MAC adress
+    QRegularExpression macRegExp(
+        "([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})[:-]([0-9A-F]{2})");
     QRegularExpressionMatch match = macRegExp.match(msg.toUpper());
-    if(match.hasMatch()){
+    if (match.hasMatch()) {
         QString foundOUI = match.captured(1) % match.captured(2) % match.captured(3);
         QString foundMAC = match.captured(0);
         QString imgName = ":/res/unknown.png";
         /*grep STMicro oui.txt | grep base
         0080E1     (base 16)            STMicroelectronics SRL
         10E77A     (base 16)            STMicrolectronics International NV*/
-        if(foundOUI == "0080E1" || foundOUI == "10E77A") {
+        if (foundOUI == "0080E1" || foundOUI == "10E77A") {
             imgName = ":/res/stm32.png";
         }
         /*grep Raspberry oui.txt | grep base
         DCA632     (base 16)            Raspberry Pi Trading Ltd
         E45F01     (base 16)            Raspberry Pi Trading Ltd
         B827EB     (base 16)            Raspberry Pi Foundation*/
-        if(foundOUI == "DCA632" || foundOUI == "E45F01" || foundOUI == "B827EB") {
+        if (foundOUI == "DCA632" || foundOUI == "E45F01" || foundOUI == "B827EB") {
             imgName = ":/res/rpi.png";
         }
         QString needle = UDP_ANS_OWNER;
         QString owner = "???";
         int index = msg.indexOf(needle);
-        if(index != -1){
+        if (index != -1) {
             owner = msg.mid(index + needle.length());
-        }else{
+        } else {
             ui->pteLog->appendPlainText("Warning: no OWNER found in message");
         }
 
-        QListWidgetItem * item = searchItem(foundMAC);
-        if(item == nullptr){
+        QListWidgetItem* item = searchItem(foundMAC);
+        if (item == nullptr) {
             item = new QListWidgetItem();
             ui->devices->addItem(item);
         }
         item->setIcon(QIcon(imgName));
         item->setText(tr("%1 @ %2 (%3)").arg(foundMAC).arg(host).arg(owner));
         item->setToolTip(tr("Last seen: %1").arg(QTime::currentTime().toString("H:mm:ss.zzz")));
-    }else{
+    } else {
         ui->pteLog->appendPlainText("Warning: no MAC found in message");
     }
 }
 
-QListWidgetItem *MainWindow::searchItem(QString MAC)
-{
-    QListWidgetItem * item = nullptr;
-    for(int i = 0; i < ui->devices->count(); i++){
+QListWidgetItem* MainWindow::searchItem(QString MAC) {
+    QListWidgetItem* item = nullptr;
+    for (int i = 0; i < ui->devices->count(); i++) {
         item = ui->devices->item(i);
-        if(item->text().contains(MAC)){
+        if (item->text().contains(MAC)) {
             break;
         }
         item = nullptr;
@@ -189,70 +174,56 @@ QListWidgetItem *MainWindow::searchItem(QString MAC)
     return item;
 }
 
-void MainWindow::on_devices_itemDoubleClicked(QListWidgetItem *item)
-{
-    //Copy the IP to the clipboard
+void MainWindow::on_devices_itemDoubleClicked(QListWidgetItem* item) {
+    // Copy the IP to the clipboard
     QString itemText = item->text();
-    int start = itemText.indexOf('@')+2;
-    int end = itemText.indexOf('(')-1;
-    QString ip = itemText.mid(start,end - start);
-    QClipboard *clipboard = QGuiApplication::clipboard();
+    int start = itemText.indexOf('@') + 2;
+    int end = itemText.indexOf('(') - 1;
+    QString ip = itemText.mid(start, end - start);
+    QClipboard* clipboard = QGuiApplication::clipboard();
     clipboard->setText(ip);
 }
 
-void MainWindow::on_devices_customContextMenuRequested(const QPoint &pos)
-{
-    //create menu
-    QAction copyAction(QIcon(":/res/copy-icon.png"),"Copy IP");
+void MainWindow::on_devices_customContextMenuRequested(const QPoint& pos) {
+    // create menu
+    QAction copyAction(QIcon(":/res/copy-icon.png"), "Copy IP");
     QMenu menu;
     menu.addAction(&copyAction);
 
-    //execute menu
-    QAction * action = menu.exec(ui->devices->mapToGlobal(pos));
-    if(action == &copyAction){
-        QListWidgetItem *item = ui->devices->itemAt(pos);
-        if(item){
+    // execute menu
+    QAction* action = menu.exec(ui->devices->mapToGlobal(pos));
+    if (action == &copyAction) {
+        QListWidgetItem* item = ui->devices->itemAt(pos);
+        if (item) {
             on_devices_itemDoubleClicked(item);
         }
     }
 }
 
-void MainWindow::on_actionAbout_triggered()
-{
+void MainWindow::on_actionAbout_triggered() {
     About ab(this);
     ab.exec();
 }
 
-void MainWindow::on_name_textEdited(const QString &arg1)
-{
+void MainWindow::on_name_textEdited(const QString& arg1) {
     this->name = arg1;
 }
 
-
-
-void MainWindow::on_surname_textEdited(const QString &arg1)
-{
+void MainWindow::on_surname_textEdited(const QString& arg1) {
     this->surname = arg1;
 }
 
-
-void MainWindow::on_comboBox_currentIndexChanged(int index)
-{
-    if(index == 0){
+void MainWindow::on_comboBox_currentIndexChanged(int index) {
+    if (index == 0) {
         ui->ChangeOwner->setDisabled(true);
-    }
-    else{
+    } else {
         ui->ChangeOwner->setDisabled(false);
     }
-
 }
 
-
-void MainWindow::on_ChangeOwner_clicked()
-{
+void MainWindow::on_ChangeOwner_clicked() {
     this->data = ("func1:name: " + this->name + ", surname: " + this->surname + "").toUtf8();
     this->func = 1;
     SendRequest();
     m_timer->start();
 }
-

Applications/Qt-application_for_UDP_broadcast/mainwindow.h

@@ -6,52 +6,53 @@
 #include <QtWidgets>
 #define QD qDebug() << __FILE__ << __LINE__
 
-#include "about.h"
 #include <QString>
+#include "about.h"
 
 // UDP protocol:
-//REQ= Where are you?v1.0
-//ANS= XX:XX:XX:XX:XX:XX is present and my owner is YYYYYY ZZZZZZ
-#define UDP_PORT 64000
-#define UDP_REQUEST "Where are you?"
+// REQ= Where are you?v1.0
+// ANS= XX:XX:XX:XX:XX:XX is present and my owner is YYYYYY ZZZZZZ
+#define UDP_PORT      64000
+#define UDP_REQUEST   "Where are you?"
 #define UDP_ANS_OWNER "my owner is "
 
 QT_BEGIN_NAMESPACE
-namespace Ui { class MainWindow; }
+namespace Ui {
+class MainWindow;
+}
 QT_END_NAMESPACE
 
-class MainWindow : public QMainWindow
-{
+class MainWindow : public QMainWindow {
     Q_OBJECT
 
-public:
-    MainWindow(QWidget *parent = nullptr);
+  public:
+    MainWindow(QWidget* parent = nullptr);
     ~MainWindow();
 
-private slots:
+  private slots:
     void SendRequest();
     void processPendingDatagrams();
 
     void on_pbRefresh_clicked();
-    void on_devices_itemDoubleClicked(QListWidgetItem *item);
-    void on_devices_customContextMenuRequested(const QPoint &pos);
+    void on_devices_itemDoubleClicked(QListWidgetItem* item);
+    void on_devices_customContextMenuRequested(const QPoint& pos);
 
     void on_actionAbout_triggered();
 
-    void on_name_textEdited(const QString &arg1);
+    void on_name_textEdited(const QString& arg1);
 
-    void on_surname_textEdited(const QString &arg1);
+    void on_surname_textEdited(const QString& arg1);
 
     void on_comboBox_currentIndexChanged(int index);
 
     void on_ChangeOwner_clicked();
 
-private:
-    Ui::MainWindow *ui;
-    QTimer * m_timer;
-    QUdpSocket *m_udpSocket = nullptr;
+  private:
+    Ui::MainWindow* ui;
+    QTimer* m_timer;
+    QUdpSocket* m_udpSocket = nullptr;
     void processDatagram(QString msg, QString host);
-    QListWidgetItem *searchItem(QString MAC);
+    QListWidgetItem* searchItem(QString MAC);
     QString name;
     QString surname;
     QByteArray data;

llfs-data/index.css

@@ -0,0 +1,122 @@
+body{
+	font-family:Arial;
+}
+h1{
+	font-size: 175%;
+	padding: 10px;
+    margin: 10px;
+}
+h2 {
+	font-size: 150%;
+	padding: 8px;
+	position: absolute;
+    top: -6px;
+	left: 20px;
+    background-color:orangered;
+    color: white;
+    border-radius: 20px;
+    padding-left: 30px;
+    padding-right: 30px;
+}
+h3 {
+	font-size: 125%;
+	padding: 10px;
+	margin: 10px;
+}
+p {
+	padding: 10px;
+	margin: 10px;
+}
+header {
+	padding: 30px;
+	background-color: orangered;
+}
+header:after {
+	content:"";
+	display: block;
+	clear: both;
+}
+.logo{
+	width:100px;
+	transform:rotate(-10deg);
+	-moz-transform:rotate(-10deg);
+	-webkit-transform:rotate(-10deg);
+	-o-transform:rotate(-10deg);
+	float:left;
+}
+.title{
+	color: white;
+	font-size: 40px;
+	font: 60px "Lucida Sans Unicode", "Lucida Grande", sans-serif;
+	text-align: center;
+	padding-top: 10px;
+}
+.column {
+	flex-grow: 0;
+	flex-basis: 48%;
+	position: relative;
+}
+.right {
+	margin-left: 2%;
+}
+.content {
+	padding: 20px;
+	display: flex;
+}
+/*Geef vorm aan de vakjes op de site*/
+.card {
+	background-color: white;
+	border-radius:10px;
+	padding:1%;
+	border: 1px solid black;
+	margin: 2% 0;
+	width: 100%;
+	padding-top: 30px;
+}
+.image {
+	width: 25%;
+	height: auto;
+	border: 10px solid transparent;
+}
+.image:hover {
+	border: 10px solid lightsalmon;
+	border-radius: 10px;
+}
+#selected {
+	border: 10px solid lightsalmon;
+	border-radius: 10px;
+}
+.sendButton {
+	position: absolute;
+	margin-top: 8%;
+	text-align: center;
+	margin-left: 40%;
+	font-size: 150%;
+	padding: 20px;
+	background-color:orangered;
+    color: white;
+    border-radius: 20px;
+}
+.sendButton:hover {
+	background-color:white;
+    color: orangered ;
+}
+/*---------------------------------------------------------------------------------------*/
+footer {
+	background-color: orangered;
+	padding: 20px;
+	text-align: center;
+	border-top:20px solid lightskyblue; /*solid is vast*/
+	border-bottom:20px solid lightskyblue;
+	margin-top: 20px;
+}
+.foot {
+	color: white;
+}
+html{
+    background-color: white;
+}
+#myImg {
+    border: none;
+    transition: border 0.3s;
+}

llfs-data/index.html

@@ -0,0 +1,133 @@
+<!doctype html>
+<html>
+<head>
+	<meta charset="utf-8" />
+	<title>Webservices & Applications</title>	
+    <link href="reset.css" rel="stylesheet" />
+    <link href="index.css" rel="stylesheet" />
+</head>
+	
+<body>
+<div>
+	<header>
+        <img class="logo" src="st.bmp" alt="STM"/>
+		<p class="title">
+			Webservices & Applications
+		</p>
+	</header>
+
+    <form action="cgi">
+        <div class="content row">
+            <div class="column left">
+                <div class="card">
+                        <h2>Adjustments</h2>
+                        <label for="send_text">Text LCD:</label>
+                        <input type="text" id="send_text" name="vtxt"><br><br>
+                        <label for="send_colorTxt">Select the text color:</label>
+                        <input type="color" id="send_colorTxt" name="vktxt" value="#0000ff"><br><br>
+                        <label for="send_colorBack">Select the background color:</label>
+                        <input type="color" id="send_colorBack" name="vka" value="#0000ff"><br><br>
+                        <!--<span class="sendButton" onClick="start();">
+                            <input type="submit" value="Send">
+                        </span>-->
+                        <input type="submit" value="Send" class="sendButton" onClick="start();">
+                </div>
+            </div>
+            <div class="column right">
+                <div class="card">
+                    <h2 >Images</h2>
+                    <label for="vfo">Choose your photo:</label>
+                    <div class="gallery" id="gallery">
+                        <input type="hidden" id="gallery1" name="vfo" value="">
+                    </div>   
+                    
+                </div>
+            </div>
+        </div>
+	</form>
+    <script> 
+
+        document.getElementById('send_colorBack').addEventListener('input', function() { document.body.style.backgroundColor = this.value; }); 
+        document.getElementById('send_colorTxt').addEventListener('input', function() { document.getElementById('send_text').style.color = this.value; });
+
+        /*--------------------------------------------------------------*/
+
+        // Function to load images from the folder
+        function loadImages() {
+            console.log("loadImages");
+            const xhttp = new XMLHttpRequest();
+              
+                xhttp.onload = function() {
+                    const imageContainer = document.getElementById('gallery');
+                    console.log(this.responseText);
+                    images = this.responseText.split('|');
+                    console.log(images);
+                    for (let i = 0; i < images.length; i++) {
+                        console.log(images[i]);
+                        const img = document.createElement('img');;
+                        img.src= images[i];
+                        img.alt = images[i];
+                        img.className = `image ${i}`;
+                        img.value = images[i];
+                        img.onload = () => {
+                            imageContainer.appendChild(img);
+                        }
+                        img.onclick = () => {
+                            selecteerFoto(img, i, images[i]);
+                        }
+                    }
+                }
+                xhttp.open("GET", "images.info");
+                xhttp.send();
+        }
+
+        function selecteerFoto(image, i, images) {
+            var gallery = document.getElementById('gallery1');
+            var value = gallery.getAttribute('value');
+            var Pictures = document.querySelectorAll('.gallery img');
+            Pictures.forEach(function(image) {
+                image.removeAttribute('id');
+                image.removeAttribute('name');
+            });
+            image.id = "selected";
+            image.name = "vfo";
+            image.value = images[i];
+            gallery.setAttribute('value', images);
+        }
+
+        // Call the function to load the images
+        loadImages();
+        const xhr = new XMLHttpRequest();
+
+        function start() { 
+            var send_text = document.getElementById("send_text").value;
+            var send_colorTxt = document.getElementById("send_colorTxt").value;
+            var send_colorBack = document.getElementById("send_colorBack").value;
+            var sendPicture = document.getElementById("selected").alt;
+            var url = "cgi?";
+
+            var queryString = url + "vtxt=" + send_text + "&vktxt=" + encodeURIComponent(send_colorTxt) + "&vka=" + encodeURIComponent(send_colorBack) + "&vfo=" + sendPicture;
+            console.log(queryString);
+        
+            xhr.onreadystatechange = showAnswer;
+            xhr.open("GET", queryString);
+            xhr.send();
+        }
+
+        function showAnswer() {
+            if (xhr.readyState == 4 && xhr.status == 200) {
+                alert(xhr.responseText);
+            }
+        }
+    </script>
+	<footer>
+		<p class="foot"> 
+			Copyright &copy; Thomas More Mechelen-Antwerpen vzw -
+            Campus De Nayer - Professionele bachelor elektronica-ict –
+			2023
+		</p>
+	</footer>
+</div>
+</body>
+</html>
+

llfs-data/reset.css

@@ -0,0 +1,62 @@
+/* http://meyerweb.com/eric/tools/css/reset/ 
+   v2.0b1 | 201101 
+   NOTE: WORK IN PROGRESS
+   USE WITH CAUTION AND TEST WITH ABANDON */
+
+   html, body, div, span, applet, object, iframe,
+   h1, h2, h3, h4, h5, h6, p, blockquote, pre,
+   a, abbr, acronym, address, big, cite, code,
+   del, dfn, em, img, ins, kbd, q, s, samp,
+   small, strike, strong, sub, sup, tt, var,
+   b, u, i, center,
+   dl, dt, dd, ol, ul, li,
+   fieldset, form, label, legend,
+   table, caption, tbody, tfoot, thead, tr, th, td,
+   article, aside, canvas, details, figcaption, figure, 
+   footer, header, hgroup, menu, nav, section, summary,
+   time, mark, audio, video {
+       margin: 0;
+       padding: 0;
+       border: 0;
+       outline: 0;
+       font-size: 100%;
+       font: inherit;
+       vertical-align: baseline;
+   }
+   /* HTML5 display-role reset for older browsers */
+   article, aside, details, figcaption, figure, 
+   footer, header, hgroup, menu, nav, section {
+       display: block;
+   }
+   body {
+       line-height: 1;
+   }
+   ol, ul {
+       list-style: none;
+   }
+   blockquote, q {
+       quotes: none;
+   }
+   blockquote:before, blockquote:after,
+   q:before, q:after {
+       content: '';
+       content: none;
+   }
+   
+   /* remember to define visible focus styles! 
+   :focus {
+       outline: ?????;
+   } */
+   
+   /* remember to highlight inserts somehow! */
+   ins {
+       text-decoration: none;
+   }
+   del {
+       text-decoration: line-through;
+   }
+   
+   table {
+       border-collapse: collapse;
+       border-spacing: 0;
+   }

mkllfs/main.c

@@ -60,11 +60,12 @@ int main(int argc, char** argv) {
     }
 
     // Write the header of the output file
-    fprintf(out_file, "/**\n"
-                      " * @file %s\n"
-                      " * @brief Linked list file system (llfs) data file.\n"
-                      " * This file was generated by mkllfs %s.\n"
-                      " * @date %s\n */\n\n",
+    fprintf(out_file,
+            "/**\n"
+            " * @file %s\n"
+            " * @brief Linked list file system (llfs) data file.\n"
+            " * This file was generated by mkllfs %s.\n"
+            " * @date %s\n */\n\n",
             argv[argc - 1], VERSION, __DATE__);
 
     // Write the headers of the output file
@@ -125,7 +126,8 @@ int main(int argc, char** argv) {
 
     // Make the last file the root file of the llfs
     fprintf(out_file, "\n");
-    fprintf(out_file, "const struct llfs_data_file *llfs_root =%s%s;\n", (strcmp(prev_llfs_name, "NULL") == 0 ? " " : " &"), prev_llfs_name);
+    fprintf(out_file, "const struct llfs_data_file *llfs_root =%s%s;\n",
+            (strcmp(prev_llfs_name, "NULL") == 0 ? " " : " &"), prev_llfs_name);
 
     // Print the number of files
     printf("Successfully converted %d files.\r\n", file_count);

mkllfs/tinydir.h

@@ -45,63 +45,62 @@ extern "C" {
 #include <stdlib.h>
 #include <string.h>
 #ifdef _MSC_VER
-# ifndef WIN32_LEAN_AND_MEAN
-#  define WIN32_LEAN_AND_MEAN
-# endif
-# include <windows.h>
-# include <tchar.h>
-# pragma warning(push)
-# pragma warning (disable : 4996)
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <tchar.h>
+#include <windows.h>
+#pragma warning(push)
+#pragma warning(disable : 4996)
 #else
-# include <dirent.h>
-# include <libgen.h>
-# include <sys/stat.h>
-# include <stddef.h>
+#include <dirent.h>
+#include <libgen.h>
+#include <stddef.h>
+#include <sys/stat.h>
 #endif
 #ifdef __MINGW32__
-# include <tchar.h>
+#include <tchar.h>
 #endif
 
-
 /* types */
 
 /* Windows UNICODE wide character support */
 #if defined _MSC_VER || defined __MINGW32__
-# define _tinydir_char_t TCHAR
-# define TINYDIR_STRING(s) _TEXT(s)
-# define _tinydir_strlen _tcslen
-# define _tinydir_strcpy _tcscpy
-# define _tinydir_strcat _tcscat
-# define _tinydir_strcmp _tcscmp
-# define _tinydir_strrchr _tcsrchr
-# define _tinydir_strncmp _tcsncmp
+#define _tinydir_char_t   TCHAR
+#define TINYDIR_STRING(s) _TEXT(s)
+#define _tinydir_strlen   _tcslen
+#define _tinydir_strcpy   _tcscpy
+#define _tinydir_strcat   _tcscat
+#define _tinydir_strcmp   _tcscmp
+#define _tinydir_strrchr  _tcsrchr
+#define _tinydir_strncmp  _tcsncmp
 #else
-# define _tinydir_char_t char
-# define TINYDIR_STRING(s) s
-# define _tinydir_strlen strlen
-# define _tinydir_strcpy strcpy
-# define _tinydir_strcat strcat
-# define _tinydir_strcmp strcmp
-# define _tinydir_strrchr strrchr
-# define _tinydir_strncmp strncmp
+#define _tinydir_char_t   char
+#define TINYDIR_STRING(s) s
+#define _tinydir_strlen   strlen
+#define _tinydir_strcpy   strcpy
+#define _tinydir_strcat   strcat
+#define _tinydir_strcmp   strcmp
+#define _tinydir_strrchr  strrchr
+#define _tinydir_strncmp  strncmp
 #endif
 
 #if (defined _MSC_VER || defined __MINGW32__)
-# include <windows.h>
-# define _TINYDIR_PATH_MAX MAX_PATH
-#elif defined  __linux__
-# include <limits.h>
-# ifdef PATH_MAX
-#  define _TINYDIR_PATH_MAX PATH_MAX
-# endif
+#include <windows.h>
+#define _TINYDIR_PATH_MAX MAX_PATH
+#elif defined __linux__
+#include <limits.h>
+#ifdef PATH_MAX
+#define _TINYDIR_PATH_MAX PATH_MAX
+#endif
 #elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-# include <sys/param.h>
-# if defined(BSD)
-#  include <limits.h>
-#  ifdef PATH_MAX
-#   define _TINYDIR_PATH_MAX PATH_MAX
-#  endif
-# endif
+#include <sys/param.h>
+#if defined(BSD)
+#include <limits.h>
+#ifdef PATH_MAX
+#define _TINYDIR_PATH_MAX PATH_MAX
+#endif
+#endif
 #endif
 
 #ifndef _TINYDIR_PATH_MAX
@@ -110,9 +109,9 @@ extern "C" {
 
 #ifdef _MSC_VER
 /* extra chars for the "\\*" mask */
-# define _TINYDIR_PATH_EXTRA 2
+#define _TINYDIR_PATH_EXTRA 2
 #else
-# define _TINYDIR_PATH_EXTRA 0
+#define _TINYDIR_PATH_EXTRA 0
 #endif
 
 #define _TINYDIR_FILENAME_MAX 256
@@ -122,16 +121,16 @@ extern "C" {
 #endif
 
 #ifdef _MSC_VER
-# define _TINYDIR_FUNC static __inline
+#define _TINYDIR_FUNC static __inline
 #elif !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
-# define _TINYDIR_FUNC static __inline__
+#define _TINYDIR_FUNC static __inline__
 #elif defined(__cplusplus)
-# define _TINYDIR_FUNC static inline
+#define _TINYDIR_FUNC static inline
 #elif defined(__GNUC__)
 /* Suppress unused function warning */
-# define _TINYDIR_FUNC __attribute__((unused)) static
+#define _TINYDIR_FUNC __attribute__((unused)) static
 #else
-# define _TINYDIR_FUNC static
+#define _TINYDIR_FUNC static
 #endif
 
 /* readdir_r usage; define TINYDIR_USE_READDIR_R to use it (if supported) */
@@ -139,52 +138,48 @@ extern "C" {
 
 /* readdir_r is a POSIX-only function, and may not be available under various
  * environments/settings, e.g. MinGW. Use readdir fallback */
-#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE ||\
-	_POSIX_SOURCE
-# define _TINYDIR_HAS_READDIR_R
+#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE || _POSIX_SOURCE
+#define _TINYDIR_HAS_READDIR_R
 #endif
 #if _POSIX_C_SOURCE >= 200112L
-# define _TINYDIR_HAS_FPATHCONF
-# include <unistd.h>
+#define _TINYDIR_HAS_FPATHCONF
+#include <unistd.h>
 #endif
-#if _BSD_SOURCE || _SVID_SOURCE || \
-	(_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
-# define _TINYDIR_HAS_DIRFD
-# include <sys/types.h>
+#if _BSD_SOURCE || _SVID_SOURCE || (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
+#define _TINYDIR_HAS_DIRFD
+#include <sys/types.h>
 #endif
-#if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD &&\
-	defined _PC_NAME_MAX
-# define _TINYDIR_USE_FPATHCONF
+#if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD && defined _PC_NAME_MAX
+#define _TINYDIR_USE_FPATHCONF
 #endif
-#if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R ||\
-	!(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX)
-# define _TINYDIR_USE_READDIR
+#if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R || !(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX)
+#define _TINYDIR_USE_READDIR
 #endif
 
 /* Use readdir by default */
 #else
-# define _TINYDIR_USE_READDIR
+#define _TINYDIR_USE_READDIR
 #endif
 
 /* MINGW32 has two versions of dirent, ASCII and UNICODE*/
 #ifndef _MSC_VER
 #if (defined __MINGW32__) && (defined _UNICODE)
-#define _TINYDIR_DIR _WDIR
-#define _tinydir_dirent _wdirent
-#define _tinydir_opendir _wopendir
-#define _tinydir_readdir _wreaddir
+#define _TINYDIR_DIR      _WDIR
+#define _tinydir_dirent   _wdirent
+#define _tinydir_opendir  _wopendir
+#define _tinydir_readdir  _wreaddir
 #define _tinydir_closedir _wclosedir
 #else
-#define _TINYDIR_DIR DIR
-#define _tinydir_dirent dirent
-#define _tinydir_opendir opendir
-#define _tinydir_readdir readdir
+#define _TINYDIR_DIR      DIR
+#define _tinydir_dirent   dirent
+#define _tinydir_opendir  opendir
+#define _tinydir_readdir  readdir
 #define _tinydir_closedir closedir
 #endif
 #endif
 
 /* Allow user to use a custom allocator by defining _TINYDIR_MALLOC and _TINYDIR_FREE. */
-#if    defined(_TINYDIR_MALLOC) &&  defined(_TINYDIR_FREE)
+#if defined(_TINYDIR_MALLOC) && defined(_TINYDIR_FREE)
 #elif !defined(_TINYDIR_MALLOC) && !defined(_TINYDIR_FREE)
 #else
 #error "Either define both alloc and free or none of them!"
@@ -195,11 +190,10 @@ extern "C" {
 #define _TINYDIR_FREE(_ptr)    free(_ptr)
 #endif /* !defined(_TINYDIR_MALLOC) */
 
-typedef struct tinydir_file
-{
+typedef struct tinydir_file {
     _tinydir_char_t path[_TINYDIR_PATH_MAX];
     _tinydir_char_t name[_TINYDIR_FILENAME_MAX];
-    _tinydir_char_t *extension;
+    _tinydir_char_t* extension;
     int is_dir;
     int is_reg;
 
@@ -212,80 +206,74 @@ typedef struct tinydir_file
 #endif
 } tinydir_file;
 
-typedef struct tinydir_dir
-{
+typedef struct tinydir_dir {
     _tinydir_char_t path[_TINYDIR_PATH_MAX];
     int has_next;
     size_t n_files;
 
-    tinydir_file *_files;
+    tinydir_file* _files;
 #ifdef _MSC_VER
     HANDLE _h;
-	WIN32_FIND_DATA _f;
+    WIN32_FIND_DATA _f;
 #else
-    _TINYDIR_DIR *_d;
-    struct _tinydir_dirent *_e;
+    _TINYDIR_DIR* _d;
+    struct _tinydir_dirent* _e;
 #ifndef _TINYDIR_USE_READDIR
-    struct _tinydir_dirent *_ep;
+    struct _tinydir_dirent* _ep;
 #endif
 #endif
 } tinydir_dir;
 
-
 /* declarations */
 
 _TINYDIR_FUNC
-int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path);
+int tinydir_open(tinydir_dir* dir, const _tinydir_char_t* path);
 _TINYDIR_FUNC
-int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path);
+int tinydir_open_sorted(tinydir_dir* dir, const _tinydir_char_t* path);
 _TINYDIR_FUNC
-void tinydir_close(tinydir_dir *dir);
+void tinydir_close(tinydir_dir* dir);
 
 _TINYDIR_FUNC
-int tinydir_next(tinydir_dir *dir);
+int tinydir_next(tinydir_dir* dir);
 _TINYDIR_FUNC
-int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file);
+int tinydir_readfile(const tinydir_dir* dir, tinydir_file* file);
 _TINYDIR_FUNC
-int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i);
+int tinydir_readfile_n(const tinydir_dir* dir, tinydir_file* file, size_t i);
 _TINYDIR_FUNC
-int tinydir_open_subdir_n(tinydir_dir *dir, size_t i);
+int tinydir_open_subdir_n(tinydir_dir* dir, size_t i);
 
 _TINYDIR_FUNC
-int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path);
+int tinydir_file_open(tinydir_file* file, const _tinydir_char_t* path);
 _TINYDIR_FUNC
-void _tinydir_get_ext(tinydir_file *file);
+void _tinydir_get_ext(tinydir_file* file);
 _TINYDIR_FUNC
-int _tinydir_file_cmp(const void *a, const void *b);
+int _tinydir_file_cmp(const void* a, const void* b);
 #ifndef _MSC_VER
 #ifndef _TINYDIR_USE_READDIR
 _TINYDIR_FUNC
-size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp);
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR* dirp);
 #endif
 #endif
 
-
 /* definitions*/
 
 _TINYDIR_FUNC
-int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
-{
+int tinydir_open(tinydir_dir* dir, const _tinydir_char_t* path) {
 #ifndef _MSC_VER
 #ifndef _TINYDIR_USE_READDIR
     int error;
-	int size;	/* using int size */
+    int size; /* using int size */
 #endif
 #else
     _tinydir_char_t path_buf[_TINYDIR_PATH_MAX];
 #endif
-    _tinydir_char_t *pathp;
+    _tinydir_char_t* pathp;
 
-    if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0)
-    {
+    if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0) {
         errno = EINVAL;
         return -1;
     }
-    if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
-    {
+    if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) {
         errno = ENAMETOOLONG;
         return -1;
     }
@@ -305,26 +293,23 @@ int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
     _tinydir_strcpy(dir->path, path);
     /* Remove trailing slashes */
     pathp = &dir->path[_tinydir_strlen(dir->path) - 1];
-    while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/')))
-    {
+    while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/'))) {
         *pathp = TINYDIR_STRING('\0');
         pathp++;
     }
 #ifdef _MSC_VER
     _tinydir_strcpy(path_buf, dir->path);
-	_tinydir_strcat(path_buf, TINYDIR_STRING("\\*"));
+    _tinydir_strcat(path_buf, TINYDIR_STRING("\\*"));
 #if (defined WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
-	dir->_h = FindFirstFileEx(path_buf, FindExInfoStandard, &dir->_f, FindExSearchNameMatch, NULL, 0);
+    dir->_h = FindFirstFileEx(path_buf, FindExInfoStandard, &dir->_f, FindExSearchNameMatch, NULL, 0);
 #else
-	dir->_h = FindFirstFile(path_buf, &dir->_f);
+    dir->_h = FindFirstFile(path_buf, &dir->_f);
 #endif
-	if (dir->_h == INVALID_HANDLE_VALUE)
-	{
-		errno = ENOENT;
+    if (dir->_h == INVALID_HANDLE_VALUE) {
+        errno = ENOENT;
 #else
     dir->_d = _tinydir_opendir(path);
-    if (dir->_d == NULL)
-    {
+    if (dir->_d == NULL) {
 #endif
         goto bail;
     }
@@ -336,77 +321,69 @@ int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
     dir->_e = _tinydir_readdir(dir->_d);
 #else
     /* allocate dirent buffer for readdir_r */
-	size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */
-	if (size == -1) return -1;
-	dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size);
-	if (dir->_ep == NULL) return -1;
+    size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */
+    if (size == -1)
+        return -1;
+    dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size);
+    if (dir->_ep == NULL)
+        return -1;
 
-	error = readdir_r(dir->_d, dir->_ep, &dir->_e);
-	if (error != 0) return -1;
+    error = readdir_r(dir->_d, dir->_ep, &dir->_e);
+    if (error != 0)
+        return -1;
 #endif
-    if (dir->_e == NULL)
-    {
+    if (dir->_e == NULL) {
         dir->has_next = 0;
     }
 #endif
 
     return 0;
 
-    bail:
+bail:
     tinydir_close(dir);
     return -1;
 }
 
 _TINYDIR_FUNC
-int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path)
-{
+int tinydir_open_sorted(tinydir_dir* dir, const _tinydir_char_t* path) {
     /* Count the number of files first, to pre-allocate the files array */
     size_t n_files = 0;
-    if (tinydir_open(dir, path) == -1)
-    {
+    if (tinydir_open(dir, path) == -1) {
         return -1;
     }
-    while (dir->has_next)
-    {
+    while (dir->has_next) {
         n_files++;
-        if (tinydir_next(dir) == -1)
-        {
+        if (tinydir_next(dir) == -1) {
             goto bail;
         }
     }
     tinydir_close(dir);
 
-    if (n_files == 0 || tinydir_open(dir, path) == -1)
-    {
+    if (n_files == 0 || tinydir_open(dir, path) == -1) {
         return -1;
     }
 
     dir->n_files = 0;
-    dir->_files = (tinydir_file *)_TINYDIR_MALLOC(sizeof *dir->_files * n_files);
-    if (dir->_files == NULL)
-    {
+    dir->_files = (tinydir_file*)_TINYDIR_MALLOC(sizeof *dir->_files * n_files);
+    if (dir->_files == NULL) {
         goto bail;
     }
-    while (dir->has_next)
-    {
-        tinydir_file *p_file;
+    while (dir->has_next) {
+        tinydir_file* p_file;
         dir->n_files++;
 
         p_file = &dir->_files[dir->n_files - 1];
-        if (tinydir_readfile(dir, p_file) == -1)
-        {
+        if (tinydir_readfile(dir, p_file) == -1) {
             goto bail;
         }
 
-        if (tinydir_next(dir) == -1)
-        {
+        if (tinydir_next(dir) == -1) {
             goto bail;
         }
 
         /* Just in case the number of files has changed between the first and
         second reads, terminate without writing into unallocated memory */
-        if (dir->n_files == n_files)
-        {
+        if (dir->n_files == n_files) {
             break;
         }
     }
@@ -415,16 +392,14 @@ int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path)
 
     return 0;
 
-    bail:
+bail:
     tinydir_close(dir);
     return -1;
 }
 
 _TINYDIR_FUNC
-void tinydir_close(tinydir_dir *dir)
-{
-    if (dir == NULL)
-    {
+void tinydir_close(tinydir_dir* dir) {
+    if (dir == NULL) {
         return;
     }
 
@@ -434,35 +409,30 @@ void tinydir_close(tinydir_dir *dir)
     _TINYDIR_FREE(dir->_files);
     dir->_files = NULL;
 #ifdef _MSC_VER
-    if (dir->_h != INVALID_HANDLE_VALUE)
-	{
-		FindClose(dir->_h);
-	}
-	dir->_h = INVALID_HANDLE_VALUE;
+    if (dir->_h != INVALID_HANDLE_VALUE) {
+        FindClose(dir->_h);
+    }
+    dir->_h = INVALID_HANDLE_VALUE;
 #else
-    if (dir->_d)
-    {
+    if (dir->_d) {
         _tinydir_closedir(dir->_d);
     }
     dir->_d = NULL;
     dir->_e = NULL;
 #ifndef _TINYDIR_USE_READDIR
     _TINYDIR_FREE(dir->_ep);
-	dir->_ep = NULL;
+    dir->_ep = NULL;
 #endif
 #endif
 }
 
 _TINYDIR_FUNC
-int tinydir_next(tinydir_dir *dir)
-{
-    if (dir == NULL)
-    {
+int tinydir_next(tinydir_dir* dir) {
+    if (dir == NULL) {
         errno = EINVAL;
         return -1;
     }
-    if (!dir->has_next)
-    {
+    if (!dir->has_next) {
         errno = ENOENT;
         return -1;
     }
@@ -473,27 +443,23 @@ int tinydir_next(tinydir_dir *dir)
 #ifdef _TINYDIR_USE_READDIR
     dir->_e = _tinydir_readdir(dir->_d);
 #else
-    if (dir->_ep == NULL)
-	{
-		return -1;
-	}
-	if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0)
-	{
-		return -1;
-	}
+    if (dir->_ep == NULL) {
+        return -1;
+    }
+    if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0) {
+        return -1;
+    }
 #endif
     if (dir->_e == NULL)
 #endif
     {
         dir->has_next = 0;
 #ifdef _MSC_VER
-        if (GetLastError() != ERROR_SUCCESS &&
-			GetLastError() != ERROR_NO_MORE_FILES)
-		{
-			tinydir_close(dir);
-			errno = EIO;
-			return -1;
-		}
+        if (GetLastError() != ERROR_SUCCESS && GetLastError() != ERROR_NO_MORE_FILES) {
+            tinydir_close(dir);
+            errno = EIO;
+            return -1;
+        }
 #endif
     }
 
@@ -501,11 +467,9 @@ int tinydir_next(tinydir_dir *dir)
 }
 
 _TINYDIR_FUNC
-int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
-{
-    const _tinydir_char_t *filename;
-    if (dir == NULL || file == NULL)
-    {
+int tinydir_readfile(const tinydir_dir* dir, tinydir_file* file) {
+    const _tinydir_char_t* filename;
+    if (dir == NULL || file == NULL) {
         errno = EINVAL;
         return -1;
     }
@@ -520,20 +484,16 @@ int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
     }
     filename =
 #ifdef _MSC_VER
-            dir->_f.cFileName;
+        dir->_f.cFileName;
 #else
-            dir->_e->d_name;
+        dir->_e->d_name;
 #endif
-    if (_tinydir_strlen(dir->path) +
-        _tinydir_strlen(filename) + 1 + _TINYDIR_PATH_EXTRA >=
-        _TINYDIR_PATH_MAX)
-    {
+    if (_tinydir_strlen(dir->path) + _tinydir_strlen(filename) + 1 + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) {
         /* the path for the file will be too long */
         errno = ENAMETOOLONG;
         return -1;
     }
-    if (_tinydir_strlen(filename) >= _TINYDIR_FILENAME_MAX)
-    {
+    if (_tinydir_strlen(filename) >= _TINYDIR_FILENAME_MAX) {
         errno = ENAMETOOLONG;
         return -1;
     }
@@ -546,17 +506,15 @@ int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
 #ifndef _MSC_VER
 #ifdef __MINGW32__
     if (_tstat(
-#elif (defined _BSD_SOURCE) || (defined _DEFAULT_SOURCE)	\
-	|| ((defined _XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500))	\
-	|| ((defined _POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) \
-	|| ((defined __APPLE__) && (defined __MACH__)) \
-	|| (defined BSD)
-            if (lstat(
+#elif (defined _BSD_SOURCE) || (defined _DEFAULT_SOURCE) || ((defined _XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500))   \
+    || ((defined _POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) || ((defined __APPLE__) && (defined __MACH__)) \
+    || (defined BSD)
+    if (lstat(
 #else
-	if (stat(
+    if (stat(
 #endif
-            file->path, &file->_s) == -1)
-    {
+            file->path, &file->_s)
+        == -1) {
         return -1;
     }
 #endif
@@ -564,42 +522,38 @@ int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
 
     file->is_dir =
 #ifdef _MSC_VER
-            !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+        !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
 #else
-            S_ISDIR(file->_s.st_mode);
+        S_ISDIR(file->_s.st_mode);
 #endif
     file->is_reg =
 #ifdef _MSC_VER
-            !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) ||
-		(
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) &&
+        !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL)
+        || (!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE)
+            && !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+            && !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) &&
 #ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) &&
+            !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) &&
 #endif
 #ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) &&
+            !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) &&
 #endif
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY));
+            !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE)
+            && !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY));
 #else
-            S_ISREG(file->_s.st_mode);
+        S_ISREG(file->_s.st_mode);
 #endif
 
     return 0;
 }
 
 _TINYDIR_FUNC
-int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i)
-{
-    if (dir == NULL || file == NULL)
-    {
+int tinydir_readfile_n(const tinydir_dir* dir, tinydir_file* file, size_t i) {
+    if (dir == NULL || file == NULL) {
         errno = EINVAL;
         return -1;
     }
-    if (i >= dir->n_files)
-    {
+    if (i >= dir->n_files) {
         errno = ENOENT;
         return -1;
     }
@@ -611,24 +565,20 @@ int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i)
 }
 
 _TINYDIR_FUNC
-int tinydir_open_subdir_n(tinydir_dir *dir, size_t i)
-{
+int tinydir_open_subdir_n(tinydir_dir* dir, size_t i) {
     _tinydir_char_t path[_TINYDIR_PATH_MAX];
-    if (dir == NULL)
-    {
+    if (dir == NULL) {
         errno = EINVAL;
         return -1;
     }
-    if (i >= dir->n_files || !dir->_files[i].is_dir)
-    {
+    if (i >= dir->n_files || !dir->_files[i].is_dir) {
         errno = ENOENT;
         return -1;
     }
 
     _tinydir_strcpy(path, dir->_files[i].path);
     tinydir_close(dir);
-    if (tinydir_open_sorted(dir, path) == -1)
-    {
+    if (tinydir_open_sorted(dir, path) == -1) {
         return -1;
     }
 
@@ -637,66 +587,52 @@ int tinydir_open_subdir_n(tinydir_dir *dir, size_t i)
 
 /* Open a single file given its path */
 _TINYDIR_FUNC
-int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
-{
+int tinydir_file_open(tinydir_file* file, const _tinydir_char_t* path) {
     tinydir_dir dir;
     int result = 0;
     int found = 0;
     _tinydir_char_t dir_name_buf[_TINYDIR_PATH_MAX];
     _tinydir_char_t file_name_buf[_TINYDIR_FILENAME_MAX];
-    _tinydir_char_t *dir_name;
-    _tinydir_char_t *base_name;
+    _tinydir_char_t* dir_name;
+    _tinydir_char_t* base_name;
 #if (defined _MSC_VER || defined __MINGW32__)
     _tinydir_char_t drive_buf[_TINYDIR_PATH_MAX];
     _tinydir_char_t ext_buf[_TINYDIR_FILENAME_MAX];
 #endif
 
-    if (file == NULL || path == NULL || _tinydir_strlen(path) == 0)
-    {
+    if (file == NULL || path == NULL || _tinydir_strlen(path) == 0) {
         errno = EINVAL;
         return -1;
     }
-    if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
-    {
+    if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) {
         errno = ENAMETOOLONG;
         return -1;
     }
 
-        /* Get the parent path */
+    /* Get the parent path */
 #if (defined _MSC_VER || defined __MINGW32__)
 #if ((defined _MSC_VER) && (_MSC_VER >= 1400))
-        errno = _tsplitpath_s(
-		path,
-		drive_buf, _TINYDIR_DRIVE_MAX,
-		dir_name_buf, _TINYDIR_FILENAME_MAX,
-		file_name_buf, _TINYDIR_FILENAME_MAX,
-		ext_buf, _TINYDIR_FILENAME_MAX);
+    errno = _tsplitpath_s(path, drive_buf, _TINYDIR_DRIVE_MAX, dir_name_buf, _TINYDIR_FILENAME_MAX, file_name_buf,
+                          _TINYDIR_FILENAME_MAX, ext_buf, _TINYDIR_FILENAME_MAX);
 #else
-    _tsplitpath(
-            path,
-            drive_buf,
-            dir_name_buf,
-            file_name_buf,
-            ext_buf);
+    _tsplitpath(path, drive_buf, dir_name_buf, file_name_buf, ext_buf);
 #endif
 
-    if (errno)
-    {
+    if (errno) {
         return -1;
     }
 
 /* _splitpath_s not work fine with only filename and widechar support */
 #ifdef _UNICODE
     if (drive_buf[0] == L'\xFEFE')
-		drive_buf[0] = '\0';
-	if (dir_name_buf[0] == L'\xFEFE')
-		dir_name_buf[0] = '\0';
+        drive_buf[0] = '\0';
+    if (dir_name_buf[0] == L'\xFEFE')
+        dir_name_buf[0] = '\0';
 #endif
 
     /* Emulate the behavior of dirname by returning "." for dir name if it's
     empty */
-    if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0')
-    {
+    if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0') {
         _tinydir_strcpy(dir_name_buf, TINYDIR_STRING("."));
     }
     /* Concatenate the drive letter and dir name to form full dir name */
@@ -707,19 +643,19 @@ int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
     base_name = file_name_buf;
 #else
     _tinydir_strcpy(dir_name_buf, path);
-	dir_name = dirname(dir_name_buf);
-	_tinydir_strcpy(file_name_buf, path);
-	base_name = basename(file_name_buf);
+    dir_name = dirname(dir_name_buf);
+    _tinydir_strcpy(file_name_buf, path);
+    base_name = basename(file_name_buf);
 #endif
 
     /* Special case: if the path is a root dir, open the parent dir as the file */
 #if (defined _MSC_VER || defined __MINGW32__)
     if (_tinydir_strlen(base_name) == 0)
 #else
-        if ((_tinydir_strcmp(base_name, TINYDIR_STRING("/"))) == 0)
+    if ((_tinydir_strcmp(base_name, TINYDIR_STRING("/"))) == 0)
 #endif
     {
-        memset(file, 0, sizeof * file);
+        memset(file, 0, sizeof *file);
         file->is_dir = 1;
         file->is_reg = 0;
         _tinydir_strcpy(file->path, dir_name);
@@ -728,59 +664,48 @@ int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
     }
 
     /* Open the parent directory */
-    if (tinydir_open(&dir, dir_name) == -1)
-    {
+    if (tinydir_open(&dir, dir_name) == -1) {
         return -1;
     }
 
     /* Read through the parent directory and look for the file */
-    while (dir.has_next)
-    {
-        if (tinydir_readfile(&dir, file) == -1)
-        {
+    while (dir.has_next) {
+        if (tinydir_readfile(&dir, file) == -1) {
             result = -1;
             goto bail;
         }
-        if (_tinydir_strcmp(file->name, base_name) == 0)
-        {
+        if (_tinydir_strcmp(file->name, base_name) == 0) {
             /* File found */
             found = 1;
             break;
         }
         tinydir_next(&dir);
     }
-    if (!found)
-    {
+    if (!found) {
         result = -1;
         errno = ENOENT;
     }
 
-    bail:
+bail:
     tinydir_close(&dir);
     return result;
 }
 
 _TINYDIR_FUNC
-void _tinydir_get_ext(tinydir_file *file)
-{
-    _tinydir_char_t *period = _tinydir_strrchr(file->name, TINYDIR_STRING('.'));
-    if (period == NULL)
-    {
+void _tinydir_get_ext(tinydir_file* file) {
+    _tinydir_char_t* period = _tinydir_strrchr(file->name, TINYDIR_STRING('.'));
+    if (period == NULL) {
         file->extension = &(file->name[_tinydir_strlen(file->name)]);
-    }
-    else
-    {
+    } else {
         file->extension = period + 1;
     }
 }
 
 _TINYDIR_FUNC
-int _tinydir_file_cmp(const void *a, const void *b)
-{
-    const tinydir_file *fa = (const tinydir_file *)a;
-    const tinydir_file *fb = (const tinydir_file *)b;
-    if (fa->is_dir != fb->is_dir)
-    {
+int _tinydir_file_cmp(const void* a, const void* b) {
+    const tinydir_file* fa = (const tinydir_file*)a;
+    const tinydir_file* fb = (const tinydir_file*)b;
+    if (fa->is_dir != fb->is_dir) {
         return -(fa->is_dir - fb->is_dir);
     }
     return _tinydir_strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX);
@@ -793,36 +718,34 @@ The following authored by Ben Hutchings <ben@decadent.org.uk>
 from https://womble.decadent.org.uk/readdir_r-advisory.html
 */
 /* Calculate the required buffer size (in bytes) for directory      *
-* entries read from the given directory handle.  Return -1 if this  *
-* this cannot be done.                                              *
-*                                                                   *
-* This code does not trust values of NAME_MAX that are less than    *
-* 255, since some systems (including at least HP-UX) incorrectly    *
-* define it to be a smaller value.                                  */
+ * entries read from the given directory handle.  Return -1 if this  *
+ * this cannot be done.                                              *
+ *                                                                   *
+ * This code does not trust values of NAME_MAX that are less than    *
+ * 255, since some systems (including at least HP-UX) incorrectly    *
+ * define it to be a smaller value.                                  */
 _TINYDIR_FUNC
-size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp)
-{
-	long name_max;
-	size_t name_end;
-	/* parameter may be unused */
-	(void)dirp;
+size_t _tinydir_dirent_buf_size(_TINYDIR_DIR* dirp) {
+    long name_max;
+    size_t name_end;
+    /* parameter may be unused */
+    (void)dirp;
 
 #if defined _TINYDIR_USE_FPATHCONF
-	name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
-	if (name_max == -1)
+    name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
+    if (name_max == -1)
 #if defined(NAME_MAX)
-		name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+        name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
 #else
-		return (size_t)(-1);
+        return (size_t)(-1);
 #endif
 #elif defined(NAME_MAX)
- 	name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
+    name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
 #else
 #error "buffer size for readdir_r cannot be determined"
 #endif
-	name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1;
-	return (name_end > sizeof(struct _tinydir_dirent) ?
-		name_end : sizeof(struct _tinydir_dirent));
+    name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1;
+    return (name_end > sizeof(struct _tinydir_dirent) ? name_end : sizeof(struct _tinydir_dirent));
 }
 #endif
 #endif
@@ -831,8 +754,8 @@ size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp)
 }
 #endif
 
-# if defined (_MSC_VER)
-# pragma warning(pop)
-# endif
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
 
 #endif

project/Core/Inc/UDP_broadcast.h

@@ -20,22 +20,24 @@
 #include "lcd_api.h"
 
 // Defines used by UDP callback
-#define UDP_BROADCAST_MAX_DATA_SIZE ((UDP_BROADCAST_MAX_NAME_SIZE * 2) - 2 + 25)    // Define the maximum expected data size
-#define UDP_BROADCAST_UDP_QUESTION1 "Where are you?v1.0"                            // Expected question from UDP client
-#define UDP_BROADCAST_MAX_FUNC_LEN 7
+#define UDP_BROADCAST_MAX_DATA_SIZE \
+    ((UDP_BROADCAST_MAX_NAME_SIZE * 2) - 2 + 25)                 // Define the maximum expected data size
+#define UDP_BROADCAST_UDP_QUESTION1         "Where are you?v1.0" // Expected question from UDP client
+#define UDP_BROADCAST_MAX_FUNC_LEN          7
 #define UDP_BROADCAST_MAX_COLON_COMMA_COUNT 4
 
 // Defines used by owner details
-#define UDP_BROADCAST_MAX_REPLY_SIZE (UDP_BROADCAST_MAX_MAC_ADDR_LEN + sizeof(UDP_BROADCAST_REPLY_MIDDLE_TEXT) + (UDP_BROADCAST_MAX_NAME_SIZE * 2) + UDP_BROADCAST_MAX_REPLY_SIZE_EXTRA)
+#define UDP_BROADCAST_MAX_REPLY_SIZE                                                                              \
+    (UDP_BROADCAST_MAX_MAC_ADDR_LEN + sizeof(UDP_BROADCAST_REPLY_MIDDLE_TEXT) + (UDP_BROADCAST_MAX_NAME_SIZE * 2) \
+     + UDP_BROADCAST_MAX_REPLY_SIZE_EXTRA)
 #define UDP_BROADCAST_REPLY_MIDDLE_TEXT "is present and my owner is"
 
-#define UDP_BROADCAST_MAX_MAC_ADDR_LEN 19       // Format is: "xx:xx:xx:xx:xx:xx"
-#define UDP_BROADCAST_MAX_NAME_SIZE 21          // Code automatically leaves 1 char for '\0' (actual length = length - 1)
-#define UDP_BROADCAST_MAX_REPLY_SIZE_EXTRA 20   // Just a bit extra
+#define UDP_BROADCAST_MAX_MAC_ADDR_LEN     19 // Format is: "xx:xx:xx:xx:xx:xx"
+#define UDP_BROADCAST_MAX_NAME_SIZE        21 // Code automatically leaves 1 char for '\0' (actual length = length - 1)
+#define UDP_BROADCAST_MAX_REPLY_SIZE_EXTRA 20 // Just a bit extra
 
 #define UDP_BROADCAST_LCD_NAME_PRE_TEXT "New owner: "
-#define UDP_BROADCAST_LCD_TEXT_SIZE (strlen(UDP_BROADCAST_LCD_NAME_PRE_TEXT) + UDP_BROADCAST_MAX_NAME_SIZE)
-
+#define UDP_BROADCAST_LCD_TEXT_SIZE     (strlen(UDP_BROADCAST_LCD_NAME_PRE_TEXT) + UDP_BROADCAST_MAX_NAME_SIZE)
 
 /**
  * @struct owner_details_t

project/Core/Inc/gifdec.h

@@ -13,10 +13,10 @@
 #ifndef __ANIMATEDGIF__
 #define __ANIMATEDGIF__
 
-#include <stdio.h>
 #include <stdint.h>
-#include <string.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #define memcpy_P memcpy
 #define PROGMEM
 
@@ -39,9 +39,9 @@
 // with 256 entries
 //
 #define MAX_CODE_SIZE 12
-#define MAX_COLORS 256
-#define LZW_BUF_SIZE (6*MAX_CHUNK_SIZE)
-#define LZW_HIGHWATER (4*MAX_CHUNK_SIZE)
+#define MAX_COLORS    256
+#define LZW_BUF_SIZE  (6 * MAX_CHUNK_SIZE)
+#define LZW_HIGHWATER (4 * MAX_CHUNK_SIZE)
 #ifdef __LINUX__
 #define MAX_WIDTH 2048
 #else
@@ -50,13 +50,13 @@
 // This buffer is used to store the pixel sequence in reverse order
 // it needs to be large enough to hold the longest possible
 // sequence (1<<MAX_CODE_SIZE)
-#define FILE_BUF_SIZE (1<<MAX_CODE_SIZE)
+#define FILE_BUF_SIZE (1 << MAX_CODE_SIZE)
 
 #define PIXEL_FIRST 0
-#define PIXEL_LAST (1<<MAX_CODE_SIZE)
+#define PIXEL_LAST  (1 << MAX_CODE_SIZE)
 #define LINK_UNUSED 5911 // 0x1717 to use memset
-#define LINK_END 5912
-#define MAX_HASH 5003
+#define LINK_END    5912
+#define MAX_HASH    5003
 
 enum {
     GIF_PALETTE_RGB565_LE = 0, // little endian (default)
@@ -65,16 +65,13 @@ enum {
 };
 // for compatibility with older code
 #define LITTLE_ENDIAN_PIXELS GIF_PALETTE_RGB565_LE
-#define BIG_ENDIAN_PIXELS GIF_PALETTE_RGB565_BE
+#define BIG_ENDIAN_PIXELS    GIF_PALETTE_RGB565_BE
 //
 // Draw callback pixel type
 // RAW = 8-bit palettized pixels requiring transparent pixel handling
 // COOKED = 16 or 24-bpp fully rendered pixels ready for display
 //
-enum {
-    GIF_DRAW_RAW = 0,
-    GIF_DRAW_COOKED
-};
+enum { GIF_DRAW_RAW = 0, GIF_DRAW_COOKED };
 
 enum {
     GIF_SUCCESS = 0,
@@ -89,134 +86,136 @@ enum {
     GIF_ERROR_MEMORY
 };
 
-typedef struct gif_file_tag
-{
-    int32_t iPos; // current file position
-    int32_t iSize; // file size
-    uint8_t *pData; // memory file pointer
-    void * fHandle; // class pointer to File/SdFat or whatever you want
+typedef struct gif_file_tag {
+    int32_t iPos;   // current file position
+    int32_t iSize;  // file size
+    uint8_t* pData; // memory file pointer
+    void* fHandle;  // class pointer to File/SdFat or whatever you want
 } GIFFILE;
 
-typedef struct gif_info_tag
-{
+typedef struct gif_info_tag {
     int32_t iFrameCount; // total frames in file
-    int32_t iDuration; // duration of animation in milliseconds
-    int32_t iMaxDelay; // maximum frame delay
-    int32_t iMinDelay; // minimum frame delay
+    int32_t iDuration;   // duration of animation in milliseconds
+    int32_t iMaxDelay;   // maximum frame delay
+    int32_t iMinDelay;   // minimum frame delay
 } GIFINFO;
 
-typedef struct gif_draw_tag
-{
-    int iX, iY; // Corner offset of this frame on the canvas
-    int y; // current line being drawn (0 = top line of image)
-    int iWidth, iHeight; // size of this frame
-    void *pUser; // user supplied pointer
-    uint8_t *pPixels; // 8-bit source pixels for this line
-    uint16_t *pPalette; // little or big-endian RGB565 palette entries (default)
-    uint8_t *pPalette24; // RGB888 palette (optional)
-    uint8_t ucTransparent; // transparent color
+typedef struct gif_draw_tag {
+    int iX, iY;                // Corner offset of this frame on the canvas
+    int y;                     // current line being drawn (0 = top line of image)
+    int iWidth, iHeight;       // size of this frame
+    void* pUser;               // user supplied pointer
+    uint8_t* pPixels;          // 8-bit source pixels for this line
+    uint16_t* pPalette;        // little or big-endian RGB565 palette entries (default)
+    uint8_t* pPalette24;       // RGB888 palette (optional)
+    uint8_t ucTransparent;     // transparent color
     uint8_t ucHasTransparency; // flag indicating the transparent color is in use
-    uint8_t ucDisposalMethod; // frame disposal method
-    uint8_t ucBackground; // background color
+    uint8_t ucDisposalMethod;  // frame disposal method
+    uint8_t ucBackground;      // background color
     uint8_t ucIsGlobalPalette; // Flag to indicate that a global palette, rather than a local palette is being used
 } GIFDRAW;
 
 // Callback function prototypes
-typedef int32_t (GIF_READ_CALLBACK)(GIFFILE *pFile, uint8_t *pBuf, int32_t iLen);
-typedef int32_t (GIF_SEEK_CALLBACK)(GIFFILE *pFile, int32_t iPosition);
-typedef void (GIF_DRAW_CALLBACK)(GIFDRAW *pDraw);
-typedef void * (GIF_OPEN_CALLBACK)(const char *szFilename, int32_t *pFileSize);
-typedef void (GIF_CLOSE_CALLBACK)(void *pHandle);
-typedef void * (GIF_ALLOC_CALLBACK)(uint32_t iSize);
-typedef void (GIF_FREE_CALLBACK)(void *buffer);
+typedef int32_t(GIF_READ_CALLBACK)(GIFFILE* pFile, uint8_t* pBuf, int32_t iLen);
+typedef int32_t(GIF_SEEK_CALLBACK)(GIFFILE* pFile, int32_t iPosition);
+typedef void(GIF_DRAW_CALLBACK)(GIFDRAW* pDraw);
+typedef void*(GIF_OPEN_CALLBACK)(const char* szFilename, int32_t* pFileSize);
+typedef void(GIF_CLOSE_CALLBACK)(void* pHandle);
+typedef void*(GIF_ALLOC_CALLBACK)(uint32_t iSize);
+typedef void(GIF_FREE_CALLBACK)(void* buffer);
 //
 // our private structure to hold a GIF image decode state
 //
-typedef struct gif_image_tag
-{
+typedef struct gif_image_tag {
     int iWidth, iHeight, iCanvasWidth, iCanvasHeight;
     int iX, iY; // GIF corner offset
     int iBpp;
-    int iError; // last error
-    int iFrameDelay; // delay in milliseconds for this frame
-    int iRepeatCount; // NETSCAPE animation repeat count. 0=forever
+    int iError;           // last error
+    int iFrameDelay;      // delay in milliseconds for this frame
+    int iRepeatCount;     // NETSCAPE animation repeat count. 0=forever
     int iXCount, iYCount; // decoding position in image (countdown values)
-    int iLZWOff; // current LZW data offset
-    int iLZWSize; // current quantity of data in the LZW buffer
-    int iCommentPos; // file offset of start of comment data
-    short sCommentLen; // length of comment
-    GIF_READ_CALLBACK *pfnRead;
-    GIF_SEEK_CALLBACK *pfnSeek;
-    GIF_DRAW_CALLBACK *pfnDraw;
-    GIF_OPEN_CALLBACK *pfnOpen;
-    GIF_CLOSE_CALLBACK *pfnClose;
+    int iLZWOff;          // current LZW data offset
+    int iLZWSize;         // current quantity of data in the LZW buffer
+    int iCommentPos;      // file offset of start of comment data
+    short sCommentLen;    // length of comment
+    GIF_READ_CALLBACK* pfnRead;
+    GIF_SEEK_CALLBACK* pfnSeek;
+    GIF_DRAW_CALLBACK* pfnDraw;
+    GIF_OPEN_CALLBACK* pfnOpen;
+    GIF_CLOSE_CALLBACK* pfnClose;
     GIFFILE GIFFile;
-    void *pUser;
-    unsigned char *pFrameBuffer;
+    void* pUser;
+    unsigned char* pFrameBuffer;
     unsigned char *pPixels, *pOldPixels;
-    unsigned char ucLineBuf[MAX_WIDTH]; // current line
-    unsigned char ucFileBuf[FILE_BUF_SIZE]; // holds temp data and pixel stack
-    unsigned short pPalette[(MAX_COLORS * 3)/2]; // can hold RGB565 or RGB888 - set in begin()
-    unsigned short pLocalPalette[(MAX_COLORS * 3)/2]; // color palettes for GIF images
-    unsigned char ucLZW[LZW_BUF_SIZE]; // holds 6 chunks (6x255) of GIF LZW data packed together
-    unsigned short usGIFTable[1<<MAX_CODE_SIZE];
-    unsigned char ucGIFPixels[(PIXEL_LAST*2)];
+    unsigned char ucLineBuf[MAX_WIDTH];                 // current line
+    unsigned char ucFileBuf[FILE_BUF_SIZE];             // holds temp data and pixel stack
+    unsigned short pPalette[(MAX_COLORS * 3) / 2];      // can hold RGB565 or RGB888 - set in begin()
+    unsigned short pLocalPalette[(MAX_COLORS * 3) / 2]; // color palettes for GIF images
+    unsigned char ucLZW[LZW_BUF_SIZE];                  // holds 6 chunks (6x255) of GIF LZW data packed together
+    unsigned short usGIFTable[1 << MAX_CODE_SIZE];
+    unsigned char ucGIFPixels[(PIXEL_LAST * 2)];
     unsigned char bEndOfFrame;
     unsigned char ucGIFBits, ucBackground, ucTransparent, ucCodeStart, ucMap, bUseLocalPalette;
     unsigned char ucPaletteType; // RGB565 or RGB888
-    unsigned char ucDrawType; // RAW or COOKED
+    unsigned char ucDrawType;    // RAW or COOKED
 } GIFIMAGE;
 
 #ifdef __cplusplus
 //
 // The GIF class wraps portable C code which does the actual work
 //
-class AnimatedGIF
-{
+class AnimatedGIF {
   public:
-    int open(uint8_t *pData, int iDataSize, GIF_DRAW_CALLBACK *pfnDraw);
-    int openFLASH(uint8_t *pData, int iDataSize, GIF_DRAW_CALLBACK *pfnDraw);
-    int open(const char *szFilename, GIF_OPEN_CALLBACK *pfnOpen, GIF_CLOSE_CALLBACK *pfnClose, GIF_READ_CALLBACK *pfnRead, GIF_SEEK_CALLBACK *pfnSeek, GIF_DRAW_CALLBACK *pfnDraw);
+    int open(uint8_t* pData, int iDataSize, GIF_DRAW_CALLBACK* pfnDraw);
+    int openFLASH(uint8_t* pData, int iDataSize, GIF_DRAW_CALLBACK* pfnDraw);
+    int open(const char* szFilename,
+             GIF_OPEN_CALLBACK* pfnOpen,
+             GIF_CLOSE_CALLBACK* pfnClose,
+             GIF_READ_CALLBACK* pfnRead,
+             GIF_SEEK_CALLBACK* pfnSeek,
+             GIF_DRAW_CALLBACK* pfnDraw);
     void close();
     void reset();
     void begin(unsigned char ucPaletteType = GIF_PALETTE_RGB565_LE);
-    void begin(int iEndian, unsigned char ucPaletteType) { begin(ucPaletteType); };
-    int playFrame(bool bSync, int *delayMilliseconds, void *pUser = NULL);
+    void begin(int iEndian, unsigned char ucPaletteType) {
+        begin(ucPaletteType);
+    };
+    int playFrame(bool bSync, int* delayMilliseconds, void* pUser = NULL);
     int getCanvasWidth();
-    int allocFrameBuf(GIF_ALLOC_CALLBACK *pfnAlloc);
+    int allocFrameBuf(GIF_ALLOC_CALLBACK* pfnAlloc);
     int setDrawType(int iType);
-    int freeFrameBuf(GIF_FREE_CALLBACK *pfnFree);
-    uint8_t *getFrameBuf();
+    int freeFrameBuf(GIF_FREE_CALLBACK* pfnFree);
+    uint8_t* getFrameBuf();
     int getCanvasHeight();
     int getLoopCount();
-    int getInfo(GIFINFO *pInfo);
+    int getInfo(GIFINFO* pInfo);
     int getLastError();
-    int getComment(char *destBuffer);
+    int getComment(char* destBuffer);
 
   private:
     GIFIMAGE _gif;
 };
 #else
 // C interface
-int GIF_openRAM(GIFIMAGE *pGIF, uint8_t *pData, int iDataSize, GIF_DRAW_CALLBACK *pfnDraw);
-int GIF_openFile(GIFIMAGE *pGIF, const char *szFilename, GIF_DRAW_CALLBACK *pfnDraw);
-void GIF_close(GIFIMAGE *pGIF);
-void GIF_begin(GIFIMAGE *pGIF, unsigned char ucPaletteType);
-void GIF_reset(GIFIMAGE *pGIF);
-int GIF_playFrame(GIFIMAGE *pGIF, int *delayMilliseconds, void *pUser);
-int GIF_getCanvasWidth(GIFIMAGE *pGIF);
-int GIF_getCanvasHeight(GIFIMAGE *pGIF);
-int GIF_getComment(GIFIMAGE *pGIF, char *destBuffer);
-int GIF_getInfo(GIFIMAGE *pGIF, GIFINFO *pInfo);
-int GIF_getLastError(GIFIMAGE *pGIF);
-int GIF_getLoopCount(GIFIMAGE *pGIF);
+int GIF_openRAM(GIFIMAGE* pGIF, uint8_t* pData, int iDataSize, GIF_DRAW_CALLBACK* pfnDraw);
+int GIF_openFile(GIFIMAGE* pGIF, const char* szFilename, GIF_DRAW_CALLBACK* pfnDraw);
+void GIF_close(GIFIMAGE* pGIF);
+void GIF_begin(GIFIMAGE* pGIF, unsigned char ucPaletteType);
+void GIF_reset(GIFIMAGE* pGIF);
+int GIF_playFrame(GIFIMAGE* pGIF, int* delayMilliseconds, void* pUser);
+int GIF_getCanvasWidth(GIFIMAGE* pGIF);
+int GIF_getCanvasHeight(GIFIMAGE* pGIF);
+int GIF_getComment(GIFIMAGE* pGIF, char* destBuffer);
+int GIF_getInfo(GIFIMAGE* pGIF, GIFINFO* pInfo);
+int GIF_getLastError(GIFIMAGE* pGIF);
+int GIF_getLoopCount(GIFIMAGE* pGIF);
 #endif // __cplusplus
 
 // Due to unaligned memory causing an exception, we have to do these macros the slow way
-#define INTELSHORT(p) ((*p) + (*(p+1)<<8))
-#define INTELLONG(p) ((*p) + (*(p+1)<<8) + (*(p+2)<<16) + (*(p+3)<<24))
-#define MOTOSHORT(p) (((*(p))<<8) + (*(p+1)))
-#define MOTOLONG(p) (((*p)<<24) + ((*(p+1))<<16) + ((*(p+2))<<8) + (*(p+3)))
+#define INTELSHORT(p) ((*p) + (*(p + 1) << 8))
+#define INTELLONG(p)  ((*p) + (*(p + 1) << 8) + (*(p + 2) << 16) + (*(p + 3) << 24))
+#define MOTOSHORT(p)  (((*(p)) << 8) + (*(p + 1)))
+#define MOTOLONG(p)   (((*p) << 24) + ((*(p + 1)) << 16) + ((*(p + 2)) << 8) + (*(p + 3)))
 
 // Must be a 32-bit target processor
 #define REGISTER_WIDTH 32

project/Core/Inc/lcd_api.h

@@ -7,15 +7,15 @@
 
 #ifndef INC_LCD_API_H_
 #define INC_LCD_API_H_
+#include <ctype.h>
 #include <stdbool.h>
 #include <string.h>
-#include <ctype.h>
 
 #define LOGGER_LEVEL_ALL
-#include "log.h"
 #include "../../Drivers/BSP/STM32746G-Discovery/stm32746g_discovery_lcd.h"
-#include "llfs.h"
 #include "gifdec.h"
+#include "llfs.h"
+#include "log.h"
 
 /**
  * @brief The maximum amount of GIFs that can be displayed at the same time
@@ -23,46 +23,45 @@
  */
 #define LCD_MAX_GIFS 5
 
-#define LCD_BLUE          LCD_COLOR_BLUE
-#define LCD_GREEN         LCD_COLOR_GREEN
-#define LCD_RED           LCD_COLOR_RED
-#define LCD_CYAN          LCD_COLOR_CYAN
-#define LCD_MAGENTA       LCD_COLOR_MAGENTA
-#define LCD_YELLOW        LCD_COLOR_YELLOW
-#define LCD_LIGHTBLUE     LCD_COLOR_LIGHTBLUE
-#define LCD_LIGHTGREEN    LCD_COLOR_LIGHTGREEN
-#define LCD_LIGHTRED      LCD_COLOR_LIGHTRED
-#define LCD_LIGHTCYAN     LCD_COLOR_LIGHTCYAN
-#define LCD_LIGHTMAGENTA  LCD_COLOR_LIGHTMAGENTA
-#define LCD_LIGHTYELLOW   LCD_COLOR_LIGHTYELLOW
-#define LCD_DARKBLUE      LCD_COLOR_DARKBLUE
-#define LCD_DARKGREEN     LCD_COLOR_DARKGREEN
-#define LCD_DARKRED       LCD_COLOR_DARKRED
-#define LCD_DARKCYAN      LCD_COLOR_DARKCYAN
-#define LCD_DARKMAGENTA   LCD_COLOR_DARKMAGENTA
-#define LCD_DARKYELLOW    LCD_COLOR_DARKYELLOW
-#define LCD_WHITE         LCD_COLOR_WHITE
-#define LCD_LIGHTGRAY     LCD_COLOR_LIGHTGRAY
-#define LCD_GRAY          LCD_COLOR_GRAY
-#define LCD_DARKGRAY      LCD_COLOR_DARKGRAY
-#define LCD_BLACK         LCD_COLOR_BLACK
-#define LCD_BROWN         LCD_COLOR_BROWN
-#define LCD_ORANGE        LCD_COLOR_ORANGE
-#define LCD_TRANSPARENT   LCD_COLOR_TRANSPARENT
+#define LCD_BLUE         LCD_COLOR_BLUE
+#define LCD_GREEN        LCD_COLOR_GREEN
+#define LCD_RED          LCD_COLOR_RED
+#define LCD_CYAN         LCD_COLOR_CYAN
+#define LCD_MAGENTA      LCD_COLOR_MAGENTA
+#define LCD_YELLOW       LCD_COLOR_YELLOW
+#define LCD_LIGHTBLUE    LCD_COLOR_LIGHTBLUE
+#define LCD_LIGHTGREEN   LCD_COLOR_LIGHTGREEN
+#define LCD_LIGHTRED     LCD_COLOR_LIGHTRED
+#define LCD_LIGHTCYAN    LCD_COLOR_LIGHTCYAN
+#define LCD_LIGHTMAGENTA LCD_COLOR_LIGHTMAGENTA
+#define LCD_LIGHTYELLOW  LCD_COLOR_LIGHTYELLOW
+#define LCD_DARKBLUE     LCD_COLOR_DARKBLUE
+#define LCD_DARKGREEN    LCD_COLOR_DARKGREEN
+#define LCD_DARKRED      LCD_COLOR_DARKRED
+#define LCD_DARKCYAN     LCD_COLOR_DARKCYAN
+#define LCD_DARKMAGENTA  LCD_COLOR_DARKMAGENTA
+#define LCD_DARKYELLOW   LCD_COLOR_DARKYELLOW
+#define LCD_WHITE        LCD_COLOR_WHITE
+#define LCD_LIGHTGRAY    LCD_COLOR_LIGHTGRAY
+#define LCD_GRAY         LCD_COLOR_GRAY
+#define LCD_DARKGRAY     LCD_COLOR_DARKGRAY
+#define LCD_BLACK        LCD_COLOR_BLACK
+#define LCD_BROWN        LCD_COLOR_BROWN
+#define LCD_ORANGE       LCD_COLOR_ORANGE
+#define LCD_TRANSPARENT  LCD_COLOR_TRANSPARENT
 
-#define LCD_ARGB8888  0x00000000U
-#define LCD_RGB888    0x00000001U
-#define LCD_RGB565    0x00000002U
-#define LCD_ARGB1555  0x00000003U
+#define LCD_ARGB8888 0x00000000U
+#define LCD_RGB888   0x00000001U
+#define LCD_RGB565   0x00000002U
+#define LCD_ARGB1555 0x00000003U
 
-#define LCD_FONT8     (&Font8)
-#define LCD_FONT12    (&Font12)
-#define LCD_FONT16    (&Font16)
-#define LCD_FONT20    (&Font20)
-#define LCD_FONT24    (&Font24)
+#define LCD_FONT8  (&Font8)
+#define LCD_FONT12 (&Font12)
+#define LCD_FONT16 (&Font16)
+#define LCD_FONT20 (&Font20)
+#define LCD_FONT24 (&Font24)
 
-
-extern LTDC_HandleTypeDef  hLtdcHandler;
+extern LTDC_HandleTypeDef hLtdcHandler;
 
 typedef struct {
     GIFIMAGE gif;
@@ -105,7 +104,7 @@ void lcd_task(void);
  * @param[in] bg_color Text background color
  * @param[in] font     Font size, see defines above in file
  */
-void lcd_display_text(const char* text, uint32_t x_pos, uint32_t y_pos, uint32_t color, uint32_t bg_color, sFONT *font);
+void lcd_display_text(const char* text, uint32_t x_pos, uint32_t y_pos, uint32_t color, uint32_t bg_color, sFONT* font);
 
 /**
  * @brief Draw BMP image on screen
@@ -121,7 +120,12 @@ void lcd_display_text(const char* text, uint32_t x_pos, uint32_t y_pos, uint32_t
  * @param[in] y_size     Height of image
  * @param[in] color_mode Color mode (see defined color modes above in file)
  */
-void lcd_draw_raw_img(const void* p_src, uint32_t x_pos, uint32_t y_pos, uint32_t x_size, uint32_t y_size, uint32_t color_mode);
+void lcd_draw_raw_img(const void* p_src,
+                      uint32_t x_pos,
+                      uint32_t y_pos,
+                      uint32_t x_size,
+                      uint32_t y_size,
+                      uint32_t color_mode);
 
 /**
  * @brief Draw BMP image on screen
@@ -148,8 +152,8 @@ void lcd_draw_img_from_fs(const char* name, uint32_t x_pos, uint32_t y_pos);
 /**
  * @brief Draw BMP image on screen by specifying the llfs_file_t, the BMP image has in the file system
  * Draw BMP image from C array to the LCD screen at position X, Y by specifying the BMP image name on the filesystem
- * Supports ARGB8888, RGB565, RGB888 
- * 
+ * Supports ARGB8888, RGB565, RGB888
+ *
  * @param file  pointer to the llfs_file_t
  * @param x_pos X-position
  * @param y_pos Y-position
@@ -187,7 +191,8 @@ void lcd_stop_all_gifs(void);
 /**
  * @brief Draw GIF image on screen from memory
  * Draw GIF image from memory to the LCD screen at position X, Y
- * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_gif_t handle will be invalid for further use
+ * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_gif_t
+ * handle will be invalid for further use
  * @note Before drawing over a GIF, make sure to call lcd_stop_gif(), otherwise the GIF will keep overwriting the screen
  *
  * @param src  Pointer to the GIF image data
@@ -201,7 +206,8 @@ lcd_gif_t* lcd_draw_gif(uint8_t* src, size_t size, uint32_t x_pos, uint32_t y_po
 /**
  * @brief Draw GIF image on screen from filesystem
  * Draw GIF image from filesystem to the LCD screen at position X, Y
- * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_git_t handle will be invalidated
+ * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_git_t
+ * handle will be invalidated
  * @note Before drawing over a GIF, make sure to call lcd_stop_gif(), otherwise the GIF will keep overwriting the screen
  *
  * @param name The filename of the GIF image
@@ -212,11 +218,12 @@ lcd_gif_t* lcd_draw_gif(uint8_t* src, size_t size, uint32_t x_pos, uint32_t y_po
 lcd_gif_t* lcd_draw_gif_from_fs(const char* name, uint32_t x_pos, uint32_t y_pos);
 
 /**
-  * @brief Draw GIF image on screen from filesystem
+ * @brief Draw GIF image on screen from filesystem
  * Draw GIF image from filesystem to the LCD screen at position X, Y
- * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_git_t handle will be invalidated
- * @note Before drawing over a GIF, make sure to call lcd_stop_gif(), otherwise the GIF will keep overwriting the screen 
- * 
+ * @warning If the GIF has a loop count specified, it will stop after the specified amount of loops and the lcd_git_t
+ * handle will be invalidated
+ * @note Before drawing over a GIF, make sure to call lcd_stop_gif(), otherwise the GIF will keep overwriting the screen
+ *
  * @param file The pointer to the llfs_file_t
  * @param x_pos The X position on the screen
  * @param y_pos The Y position on the screen

project/Core/Inc/log.h

@@ -11,8 +11,8 @@
 #ifndef LOG_H
 #define LOG_H
 
-#include <stdint.h>
 #include <errno.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/times.h>
@@ -52,24 +52,24 @@
 
 #define CLEAR_SCREEN "\033c"
 
-#define CURSOR_RESET ANSI_ESC "[H"
-#define CURSOR_UP(n) ANSI_ESC "[" #n "A"
-#define CURSOR_DOWN(n) ANSI_ESC "[" #n "B"
-#define CURSOR_RIGHT(n) ANSI_ESC "[" #n "C"
-#define CURSOR_LEFT(n) ANSI_ESC "[" #n "D"
+#define CURSOR_RESET           ANSI_ESC "[H"
+#define CURSOR_UP(n)           ANSI_ESC "[" #n "A"
+#define CURSOR_DOWN(n)         ANSI_ESC "[" #n "B"
+#define CURSOR_RIGHT(n)        ANSI_ESC "[" #n "C"
+#define CURSOR_LEFT(n)         ANSI_ESC "[" #n "D"
 #define CURSOR_NEXT_N_LINES(n) ANSI_ESC "[" #n "E"
 #define CURSOR_PREV_N_LINES(n) ANSI_ESC "[" #n "F"
-#define CURSOR_COL(n) ANSI_ESC "[" #n "G"
-#define CURSOR_POS ANSI_ESC "[" #n ";" #n "H"
-#define CURSOR_SAVE ANSI_ESC "7"
-#define CURSOR_RESTORE ANSI_ESC "8"
+#define CURSOR_COL(n)          ANSI_ESC "[" #n "G"
+#define CURSOR_POS             ANSI_ESC "[" #n ";" #n "H"
+#define CURSOR_SAVE            ANSI_ESC "7"
+#define CURSOR_RESTORE         ANSI_ESC "8"
 
-#define ERASE_FROM_CURSOR_TO_END ANSI_ESC "[0J"
-#define ERASE_FROM_CURSOR_TO_BEGINNING ANSI_ESC "[1J"
-#define ERASE_ENTIRE_SCREEN ANSI_ESC "[2J"
-#define ERASE_FROM_CURSOR_TO_END_LINE ANSI_ESC "[0K"
+#define ERASE_FROM_CURSOR_TO_END            ANSI_ESC "[0J"
+#define ERASE_FROM_CURSOR_TO_BEGINNING      ANSI_ESC "[1J"
+#define ERASE_ENTIRE_SCREEN                 ANSI_ESC "[2J"
+#define ERASE_FROM_CURSOR_TO_END_LINE       ANSI_ESC "[0K"
 #define ERASE_FROM_CURSOR_TO_BEGINNING_LINE ANSI_ESC "[1K"
-#define ERASE_ENTIRE_LINE ANSI_ESC "[2K"
+#define ERASE_ENTIRE_LINE                   ANSI_ESC "[2K"
 
 #if LOGGER_COLOR == 1
 #define LOG_RESET_COLOR "\033[0m"
@@ -88,27 +88,37 @@
 #endif
 
 #if LOGGER_LEVEL <= 1
-#define LOG_DEBUG(tag, fmt, ...) printf(LOG_COLOR_D"[Debug]    (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, ##__VA_ARGS__)
+#define LOG_DEBUG(tag, fmt, ...)                                                                           \
+    printf(LOG_COLOR_D "[Debug]    (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, \
+           ##__VA_ARGS__)
 #else
 #define LOG_DEBUG(tag, fmt, ...)
 #endif
 #if LOGGER_LEVEL <= 2
-#define LOG_INFO(tag, fmt, ...)  printf(LOG_COLOR_I"[Info]     (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, ##__VA_ARGS__)
+#define LOG_INFO(tag, fmt, ...)                                                                            \
+    printf(LOG_COLOR_I "[Info]     (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, \
+           ##__VA_ARGS__)
 #else
 #define LOG_INFO(tag, fmt, ...)
 #endif
 #if LOGGER_LEVEL <= 3
-#define LOG_WARN(tag, fmt, ...)  printf(LOG_COLOR_W"[Warning]  (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, ##__VA_ARGS__)
+#define LOG_WARN(tag, fmt, ...)                                                                            \
+    printf(LOG_COLOR_W "[Warning]  (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, \
+           ##__VA_ARGS__)
 #else
 #define LOG_WARN(tag, fmt, ...)
 #endif
 #if LOGGER_LEVEL <= 4
-#define LOG_CRIT(tag, fmt, ...)   printf(LOG_COLOR_C"[Critical] (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, ##__VA_ARGS__)
+#define LOG_CRIT(tag, fmt, ...)                                                                            \
+    printf(LOG_COLOR_C "[Critical] (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, \
+           ##__VA_ARGS__)
 #else
 #define LOG_CRIT(tag, fmt, ...)
 #endif
 #if LOGGER_LEVEL <= 4
-#define LOG_FATAL(tag, fmt, ...)   printf(LOG_COLOR_F"[Fatal]    (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, ##__VA_ARGS__)
+#define LOG_FATAL(tag, fmt, ...)                                                                           \
+    printf(LOG_COLOR_F "[Fatal]    (%8lu) [%s]: " fmt LOG_RESET_COLOR "\r\n", logger_get_timestamp(), tag, \
+           ##__VA_ARGS__)
 #else
 #define LOG_FATAL(tag, fmt, ...)
 #endif
@@ -117,6 +127,6 @@
  * Use the LOG_* macros instead e.g., LOG_DEBUG(TAG, "Debug message");
  */
 uint32_t logger_get_timestamp(void);
-int _write(int file, char *data, int len);
+int _write(int file, char* data, int len);
 
 #endif /* LOG_H */

project/Core/Inc/modbus_tcp.h

@@ -1,29 +1,20 @@
 /**
  * @file modbus_tcp.h
- *
- * @brief TCP Modbus handler
- * @date Nov 6, 2023
+ * @brief TCP Modbus server
+ * @date Nov 29, 2023
  * @author Obe
+ * @author Lorenz C.
  */
 
 #ifndef INC_MODBUS_H_
 #define INC_MODBUS_H_
 
-#define MODBUSPORT 502 // 502 is the default
-
-
-#include <tcp.h>
-#include <string.h>
-#include <stdint.h>
-#include <stdio.h>
-#include "lcd_api.h"
-#include "llfs.h"
+#define MODBUS_TCP_PORT 502
 
 
 /**
- * @fn void modbus_init
- * @brief Initializes the modbus tcp
+ * @brief Initializes the modbus tcp server
  */
-void modbus_init(void);
+void modbus_tcp_init(void);
 
 #endif /* INC_MODBUS_H_ */

project/Core/Inc/tcp_cmd.h

@@ -1,21 +1,19 @@
 /**
-* @file tcp_cmd.h
-* @brief TCP CMD interface
-* @author Gert R.
-*/
+ * @file tcp_cmd.h
+ * @brief TCP CMD interface
+ * @author Gert R.
+ */
 
 #ifndef INC_TCP_CMD_H_
 #define INC_TCP_CMD_H_
 
+#include <stdio.h>
+#include <string.h>
+#include <tcp.h>
 #include "lcd_api.h"
 #include "llfs.h"
 #include "log.h"
-#include <tcp.h>
-#include <stdio.h>
-#include <string.h>
-
-
-void tcp_cmd_init( void );
 
+void tcp_cmd_init(void);
 
 #endif /* INC_TCP_CMD_H_ */

project/Core/Inc/website_backend.h

@@ -0,0 +1,82 @@
+/**
+ * @file website_backend.h
+ * @brief Backend for the website to operate
+ * @author Toon B.
+ */
+
+#ifndef INC_WEBSITE_BACKEND_
+#define INC_WEBSITE_BACKEND_
+
+/* Include headers C lib */
+#include <stdint.h>
+#include <string.h>
+
+/* Defines */
+#define LOGGER_LEVEL_ALL
+#define STR_MAX 200
+#define CLR_MAX 11
+#define IMG_X   0
+#define IMG_Y   0
+#define SD_IMG  "st.bmp"
+
+/* Include headers */
+#include "httpd.h"
+#include "lcd_api.h"
+#include "llfs.h"
+#include "log.h"
+#include "lwip.h"
+#include "lwip/apps/fs.h"
+
+/**
+ * @fn void wbe_init(void)
+ * @brief Initialise the http server. It also sets the beginning screen
+ * of the display.
+ */
+void wbe_init(void);
+
+/**
+ * @fn int fs_open_custom(struct fs_file*, const char*)
+ * @brief Function is called when the frontend wants to reach/open a file
+ * or endpoint on the backend.
+ *
+ * @param[in] file, the file pointer of the file that the frontend wants
+ * @param[in] name, the name of the file or endpoint that the frontend asks for
+ * @return[out] returns 0 if file or endpoint was not found, 1 if it was found
+ */
+int fs_open_custom(struct fs_file* file, const char* name);
+
+/**
+ * @fn void fs_close_custom(struct fs_file*)
+ * @brief Called when closing files and endpoints
+ *
+ * @param[in] file, the file pointer of the file that the frontend wants
+ */
+void fs_close_custom(struct fs_file* file);
+
+/**
+ * @fn void httpd_cgi_handler(struct fs_file*, const char*, int, char**, char**)
+ * @brief When data is send from the frontend to the backend with the CGI
+ * tag and parameters, this function is called. With this comes parameters that
+ * we want to read for further use.
+ *
+ * @param[in] file, the file pointer of the file that the frontend wants
+ * @param[in] uri, the URI that is given to the backend from the frontend (here cgi)
+ * @param[in] num_parm, the number of parameters that is given with the URI
+ * @param[in] pc_param, contains the name of each parameter
+ * @param[in] pc_value, is the value of each parameter
+ */
+void httpd_cgi_handler(struct fs_file* file, const char* uri, int num_parm, char** pc_param, char** pc_value);
+
+/**
+ * @fn void wbe_display(const char*, const uint32_t, const uint32_t, const char*)
+ * @brief Function displays the sentence, its color, the background and the given
+ *  image on the LCD screen.
+ *
+ * @param[in] txt, is the text string that needs to be displayed
+ * @param[in] txt_color, the color of the wanted string
+ * @param[in] background_color, color of the background of the screen
+ * @param[in] image, name of the wanted image to be displayed
+ */
+void wbe_display(const char* txt, const uint32_t txt_color, const uint32_t background_color, const char* image);
+
+#endif /* INC_WEBSITE_BACKEND_ */

project/Core/Src/UDP_broadcast.c

@@ -49,20 +49,18 @@ static void udp_broadcast_set_owner_details_mac(void) {
  * @see UDP_BROADCAST_LCD_NAME_PRE_TEXT in front of it
  */
 
-static void udp_broadcast_name_to_lcd(void){
+static void udp_broadcast_name_to_lcd(void) {
     char text[UDP_BROADCAST_LCD_TEXT_SIZE];
 
-    memset(text,' ',UDP_BROADCAST_LCD_TEXT_SIZE);    // Fill with spaces
-    text[UDP_BROADCAST_LCD_TEXT_SIZE - 1] = '\0';    // Make the last a NULL byte
+    memset(text, ' ', UDP_BROADCAST_LCD_TEXT_SIZE); // Fill with spaces
+    text[UDP_BROADCAST_LCD_TEXT_SIZE - 1] = '\0';   // Make the last a NULL byte
     lcd_display_text(text, owner_name_x_pos, owner_name_y_pos, LCD_BLACK, LCD_WHITE, LCD_FONT12);
 
-    snprintf(text, UDP_BROADCAST_LCD_TEXT_SIZE, "%s%s",UDP_BROADCAST_LCD_NAME_PRE_TEXT,
-                 udp_owner.name);
+    snprintf(text, UDP_BROADCAST_LCD_TEXT_SIZE, "%s%s", UDP_BROADCAST_LCD_NAME_PRE_TEXT, udp_owner.name);
 
     lcd_display_text(text, owner_name_x_pos, owner_name_y_pos, LCD_BLACK, LCD_WHITE, LCD_FONT12);
 }
 
-
 /**
  * @fn uint8_t udp_broadcast_set_owner_details_name(owner_details_t*, const char*)
  * @brief set_owner_details_name() sets the owner's name in the owner_details_t struct
@@ -76,13 +74,12 @@ static void udp_broadcast_name_to_lcd(void){
  */
 
 static uint8_t udp_broadcast_set_owner_details_name(const char* name) {
-
     if (name == NULL) {
         LOG_WARN(TAG, "%s: string given is a NULL pointer", __func__);
         return 1;
     }
     LOG_DEBUG(TAG, "set: %s", name);
-    strncpy(udp_owner.name, name, sizeof(udp_owner.name) - 1);       // -1: compensate for '\0'
+    strncpy(udp_owner.name, name, sizeof(udp_owner.name) - 1); // -1: compensate for '\0'
 
     udp_broadcast_name_to_lcd();
     return 0;
@@ -104,7 +101,7 @@ static uint8_t udp_broadcast_set_owner_details_surname(const char* surname) {
         return 1;
     }
     LOG_DEBUG(TAG, "set: %s", surname);
-    strncpy(udp_owner.surname, surname, sizeof(udp_owner.surname)-1);                  // -1: compensate for '\0'
+    strncpy(udp_owner.surname, surname, sizeof(udp_owner.surname) - 1); // -1: compensate for '\0'
     return 0;
 }
 
@@ -125,7 +122,7 @@ static uint8_t udp_broadcast_set_owner_details_reply(const char* reply) {
         return 1;
     }
     LOG_DEBUG(TAG, "set: %s", reply);
-    strncpy(udp_owner.reply, reply, sizeof(udp_owner.reply) - 1);                      // -1: compensate for '\0'
+    strncpy(udp_owner.reply, reply, sizeof(udp_owner.reply) - 1); // -1: compensate for '\0'
     return 0;
 }
 
@@ -144,8 +141,8 @@ static void udp_broadcast_format_reply(void) {
              udp_owner.mac_address[1], udp_owner.mac_address[2], udp_owner.mac_address[3], udp_owner.mac_address[4],
              udp_owner.mac_address[5]);
 
-    snprintf(reply_buf, UDP_BROADCAST_MAX_REPLY_SIZE, "%s %s %s %s", mac_addr_str, UDP_BROADCAST_REPLY_MIDDLE_TEXT, udp_owner.surname,
-             udp_owner.name);
+    snprintf(reply_buf, UDP_BROADCAST_MAX_REPLY_SIZE, "%s %s %s %s", mac_addr_str, UDP_BROADCAST_REPLY_MIDDLE_TEXT,
+             udp_owner.surname, udp_owner.name);
     udp_broadcast_set_owner_details_reply(reply_buf);
 }
 
@@ -163,7 +160,6 @@ static void udp_broadcast_format_reply(void) {
  */
 err_t udp_broadcast_set_owner_details(const char* name, const char* surname) {
     if (!udp_broadcast_set_owner_details_name(name) && !udp_broadcast_set_owner_details_surname(surname)) {
-
         // If both return 0 it's okay
         udp_broadcast_set_owner_details_mac();
         udp_broadcast_format_reply();
@@ -234,7 +230,7 @@ static uint8_t udp_broadcast_check_function(const char data[UDP_BROADCAST_MAX_DA
     memset(func, 0, sizeof(func));
     memset(buffer, 0, sizeof(buffer));
 
-    memcpy(func,data,UDP_BROADCAST_MAX_FUNC_LEN - 1);
+    memcpy(func, data, UDP_BROADCAST_MAX_FUNC_LEN - 1);
     if (strcmp(func, "func1:") != 0) {
         LOG_WARN(TAG, "%s: datagram does not contain function that's currently available", __func__);
         return 1;
@@ -245,16 +241,16 @@ static uint8_t udp_broadcast_check_function(const char data[UDP_BROADCAST_MAX_DA
             counter++;
         }
     }
-    if (enders[2] - enders[1] < UDP_BROADCAST_MAX_NAME_SIZE + 2 && data_len - enders[3] < UDP_BROADCAST_MAX_NAME_SIZE + 2
-            && strncmp(data + enders[0], ":name", 5) == 0 && strncmp(data + enders[2], ", surname", 9) == 0) {
-
+    if (enders[2] - enders[1] < UDP_BROADCAST_MAX_NAME_SIZE + 2
+        && data_len - enders[3] < UDP_BROADCAST_MAX_NAME_SIZE + 2 && strncmp(data + enders[0], ":name", 5) == 0
+        && strncmp(data + enders[2], ", surname", 9) == 0) {
         counter = 0;
         for (uint8_t i = enders[1] + 2; i < enders[2]; i++) {
             buffer[counter] = data[i];
             counter++;
         }
-        if (buffer[0]=='\0') {
-            strncpy(buffer, "name", sizeof(buffer) - 1);          // -1: compensate for '\0'
+        if (buffer[0] == '\0') {
+            strncpy(buffer, "name", sizeof(buffer) - 1); // -1: compensate for '\0'
         }
         LOG_INFO(TAG, "new owner name:%s", buffer);
         udp_broadcast_set_owner_details_name(buffer);
@@ -264,15 +260,15 @@ static uint8_t udp_broadcast_check_function(const char data[UDP_BROADCAST_MAX_DA
             buffer[counter] = data[i];
             counter++;
         }
-        if (buffer[0]=='\0') {
-            strncpy(buffer, "default", sizeof(buffer) - 1);       // -1: compensate for '\0'
+        if (buffer[0] == '\0') {
+            strncpy(buffer, "default", sizeof(buffer) - 1); // -1: compensate for '\0'
         }
         LOG_INFO(TAG, "new owner surname:%s", buffer);
         udp_broadcast_set_owner_details_surname(buffer);
         udp_broadcast_format_reply();
         return 0;
     }
-    LOG_WARN(TAG,"%s: function didn't receive the right formatting", __func__);
+    LOG_WARN(TAG, "%s: function didn't receive the right formatting", __func__);
     return 1;
 }
 
@@ -311,7 +307,7 @@ static void udp_receive_callback(void* arg,
     }
     pc = (char*)p->payload;
     len = p->tot_len;
-    if (len >= UDP_BROADCAST_MAX_DATA_SIZE) {    // >= : only if it's smaller to compensate for '\0'
+    if (len >= UDP_BROADCAST_MAX_DATA_SIZE) { // >= : only if it's smaller to compensate for '\0'
         LOG_WARN(TAG, "%s: input buffer was bigger than or was max size %d", __func__, UDP_BROADCAST_MAX_DATA_SIZE);
         return;
     }
@@ -328,15 +324,14 @@ static void udp_receive_callback(void* arg,
     LOG_INFO(TAG, "%s: received data from %s at port: %d: %s", __func__, source_ip_str, port, data);
     LOG_INFO(TAG, "%s: checking which function was called", __func__);
 
-    if(!udp_broadcast_check_function(data)){    // Should return 0 to reply
+    if (!udp_broadcast_check_function(data)) { // Should return 0 to reply
         p_data->payload = udp_owner.reply;
         p_data->len = strlen(udp_owner.reply);
         p_data->tot_len = strlen(udp_owner.reply);
-        udp_sendto(connection, p_data, addr, 64000);    // QT app listens on port 64000
+        udp_sendto(connection, p_data, addr, 64000); // QT app listens on port 64000
         LOG_INFO(TAG, "%s: tried to reply to %s at port: %d: %s", __func__, source_ip_str, 64000, udp_owner.reply);
     }
 
-
 defer:
     pbuf_free(p);
     pbuf_free(p_data);
@@ -375,8 +370,6 @@ err_t udp_broadcast_connection_init(void) {
     return err;
 }
 
-
-
 /**
  * @fn err_t udp_broadcast_init()
  * @brief udp_broadcast_init() initializes the owner's variables and calls upon @see udp_broadcast_connection_init()
@@ -391,7 +384,7 @@ err_t udp_broadcast_connection_init(void) {
 err_t udp_broadcast_init(uint32_t x_pos, uint32_t y_pos) {
     owner_name_x_pos = x_pos;
     owner_name_y_pos = y_pos;
-    if(udp_broadcast_set_owner_details("name", "default") != ERR_OK){
+    if (udp_broadcast_set_owner_details("name", "default") != ERR_OK) {
         LOG_WARN(TAG, "%s: don't give NULL pointers as arguments for the owner's details", __func__);
         return ERR_ARG;
     }

project/Core/Src/lcd_api.c

@@ -8,7 +8,6 @@
 
 #include "lcd_api.h"
 
-
 static const char* TAG = "lcd_api";
 
 static DMA2D_HandleTypeDef hDma2dHandler2;
@@ -85,7 +84,12 @@ void lcd_task(void) {
     }
 }
 
-void lcd_display_text(const char* text, uint32_t x_pos, uint32_t y_pos, uint32_t color, uint32_t bg_color, sFONT* font) {
+void lcd_display_text(const char* text,
+                      uint32_t x_pos,
+                      uint32_t y_pos,
+                      uint32_t color,
+                      uint32_t bg_color,
+                      sFONT* font) {
     BSP_LCD_SelectLayer(1);
     LOG_INFO(TAG, "Display text: %s @x=%d,y=%d", text, x_pos, y_pos);
 
@@ -118,7 +122,12 @@ void lcd_display_text(const char* text, uint32_t x_pos, uint32_t y_pos, uint32_t
     BSP_LCD_DisplayStringAt(x_pos, y_pos, (uint8_t*)text, LEFT_MODE);
 }
 
-void lcd_draw_raw_img(const void* p_src, uint32_t x_pos, uint32_t y_pos, uint32_t x_size, uint32_t y_size, uint32_t color_mode) {
+void lcd_draw_raw_img(const void* p_src,
+                      uint32_t x_pos,
+                      uint32_t y_pos,
+                      uint32_t x_size,
+                      uint32_t y_size,
+                      uint32_t color_mode) {
     LOG_INFO(TAG, "Displaying raw image: @x=%lu, @y=%lu, width=%lu, height=%lu", x_pos, y_pos, x_size, y_size);
     BSP_LCD_SelectLayer(0);
     uint32_t address = hLtdcHandler.LayerCfg[1].FBStartAdress + (((BSP_LCD_GetXSize() * y_pos) + x_pos) * (4));
@@ -197,7 +206,7 @@ void lcd_clear_images(void) {
     BSP_LCD_Clear(0);
 }
 
-void lcd_set_bg_color_layer0(uint32_t color){
+void lcd_set_bg_color_layer0(uint32_t color) {
     BSP_LCD_SelectLayer(0);
     BSP_LCD_Clear(color);
 }
@@ -316,9 +325,9 @@ static inline void free_gif_slot(lcd_gif_t* gif) {
 static void gif_draw_cb(GIFDRAW* pDraw) {
     BSP_LCD_SelectLayer(0);
     lcd_gif_t* gif = (lcd_gif_t*)pDraw->pUser;
-    uint8_t* palette = pDraw->pPalette24;   // The RGB888 color palette
-    uint8_t* p_src = pDraw->pPixels;        // Source pixel pointer
-    int y = pDraw->iY + pDraw->y;           // Current line being drawn
+    uint8_t* palette = pDraw->pPalette24; // The RGB888 color palette
+    uint8_t* p_src = pDraw->pPixels;      // Source pixel pointer
+    int y = pDraw->iY + pDraw->y;         // Current line being drawn
 
     // Calculate the destination address of the first pixel in the line
     uint32_t address = hLtdcHandler.LayerCfg[0].FBStartAdress + (((BSP_LCD_GetXSize() * gif->y_pos) + gif->x_pos) * 4)
@@ -344,10 +353,10 @@ static void gif_draw_cb(GIFDRAW* pDraw) {
         }
 
         // Get the color from the palette and convert it to ARGB8888
-        uint8_t *p = palette + (pixel * 3);
+        uint8_t* p = palette + (pixel * 3);
         uint32_t color = (0xFF << 24) | (p[0] << 16) | (p[1] << 8) | p[2];
 
         // Draw the pixel
-        ((uint32_t *)address)[x] = color;
+        ((uint32_t*)address)[x] = color;
     }
 }

project/Core/Src/llfs.c

@@ -10,8 +10,8 @@
 #include <stdio.h>
 #include <string.h>
 #define LOGGER_LEVEL_WARN
-#include "log.h"
 #include "llfs.h"
+#include "log.h"
 
 /**
  * @brief The maximum number of files that can be opened concurrently using the POSIX API
@@ -20,7 +20,7 @@
 
 extern struct llfs_data_file* llfs_root;
 static const char* TAG = "llfs";
-static size_t file_count = 0;   // Cache for the number of files in the filesystem
+static size_t file_count = 0; // Cache for the number of files in the filesystem
 static FILE* file_table[POSIX_MAX_FILES];
 
 #ifndef TESTING
@@ -331,7 +331,7 @@ off_t _lseek(int file, int ptr, int dir) {
  */
 int _fstat(int file, struct stat* st) {
     FILE* stream;
-    llfs_file_t *llfs_file;
+    llfs_file_t* llfs_file;
 
     // Check if the file is stdin, stdout or stderr
     if (file == STDIN_FILENO || file == STDOUT_FILENO || file == STDERR_FILENO) {
@@ -353,7 +353,7 @@ int _fstat(int file, struct stat* st) {
         return -1;
     }
 
-    st->st_mode = S_IFREG;  // Regular file
+    st->st_mode = S_IFREG; // Regular file
     st->st_size = (off_t)llfs_file->len;
     return 0;
 }
@@ -442,4 +442,3 @@ static uint8_t file_ext_cmp(const char* const filename, const char* const ext) {
     }
     return 1;
 }
-

project/Core/Src/log.c

@@ -7,8 +7,8 @@
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
-#include "stm32f7xx_hal.h"
 #include "log.h"
+#include "stm32f7xx_hal.h"
 
 extern UART_HandleTypeDef huart1;
 
@@ -18,7 +18,7 @@ extern UART_HandleTypeDef huart1;
  * @return The current timestamp in milliseconds since boot
  */
 
-int _write(int file, char *data, int len) {
+int _write(int file, char* data, int len) {
     HAL_StatusTypeDef status;
 
     switch (file) {

project/Core/Src/main.c

@@ -1,20 +1,20 @@
 /* USER CODE BEGIN Header */
 /**
-  ******************************************************************************
-  * @file           : main.c
-  * @brief          : Main program body
-  ******************************************************************************
-  * @attention
-  *
-  * Copyright (c) 2023 STMicroelectronics.
-  * All rights reserved.
-  *
-  * This software is licensed under terms that can be found in the LICENSE file
-  * in the root directory of this software component.
-  * If no LICENSE file comes with this software, it is provided AS-IS.
-  *
-  ******************************************************************************
-  */
+ ******************************************************************************
+ * @file           : main.c
+ * @brief          : Main program body
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2023 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
 /* USER CODE END Header */
 /* Includes ------------------------------------------------------------------*/
 #include "main.h"
@@ -33,6 +33,7 @@
 #include "modbus_tcp.h"
 #include "UDP_broadcast.h"
 #include "tcp_cmd.h"
+#include "website_backend.h"
 
 /* USER CODE END Includes */
 
@@ -43,7 +44,7 @@
 
 /* Private define ------------------------------------------------------------*/
 /* USER CODE BEGIN PD */
-static const char *TAG = "main";
+static const char* TAG = "main";
 /* USER CODE END PD */
 
 /* Private macro -------------------------------------------------------------*/
@@ -85,453 +86,434 @@ static void MX_QUADSPI_Init(void);
 /* USER CODE END 0 */
 
 /**
-  * @brief  The application entry point.
-  * @retval int
-  */
-int main(void)
-{
-  /* USER CODE BEGIN 1 */
+ * @brief  The application entry point.
+ * @retval int
+ */
+int main(void) {
+    /* USER CODE BEGIN 1 */
 
-  /* USER CODE END 1 */
+    /* USER CODE END 1 */
 
-  /* MCU Configuration--------------------------------------------------------*/
+    /* MCU Configuration--------------------------------------------------------*/
 
-  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
-  HAL_Init();
+    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+    HAL_Init();
 
-  /* USER CODE BEGIN Init */
+    /* USER CODE BEGIN Init */
 
-  /* USER CODE END Init */
+    /* USER CODE END Init */
 
-  /* Configure the system clock */
-  SystemClock_Config();
+    /* Configure the system clock */
+    SystemClock_Config();
 
-  /* USER CODE BEGIN SysInit */
+    /* USER CODE BEGIN SysInit */
 
-  /* USER CODE END SysInit */
+    /* USER CODE END SysInit */
 
-  /* Initialize all configured peripherals */
-  MX_GPIO_Init();
-  MX_LTDC_Init();
-  MX_USART1_UART_Init();
-  MX_DMA2D_Init();
-  MX_FMC_Init();
-  MX_LWIP_Init();
-  MX_QUADSPI_Init();
-  /* USER CODE BEGIN 2 */
+    /* Initialize all configured peripherals */
+    MX_GPIO_Init();
+    MX_LTDC_Init();
+    MX_USART1_UART_Init();
+    MX_DMA2D_Init();
+    MX_FMC_Init();
+    MX_LWIP_Init();
+    MX_QUADSPI_Init();
+    /* USER CODE BEGIN 2 */
 
-  /* Initialize QSPI */
-  BSP_QSPI_Init();
-  BSP_QSPI_MemoryMappedMode();
-  WRITE_REG(QUADSPI->LPTR, 0xFFF);
+    /* Initialize QSPI */
+    BSP_QSPI_Init();
+    BSP_QSPI_MemoryMappedMode();
+    WRITE_REG(QUADSPI->LPTR, 0xFFF);
 
-  /* Clear terminal */
-  printf(CLEAR_SCREEN);
+    /* Clear terminal */
+    printf(CLEAR_SCREEN);
 
-  /* Initialize the LCD */
-  lcd_init(true);
+    /* Initialize the LCD */
+    lcd_init(true);
 
-  /* Initialize the filesystem */
-  llfs_init();
+    /* Initialize the filesystem */
+    llfs_init();
 
-  /* Initialize the tftp server */
-  tftp_server_init();
- 
-  /* Initialize tcp command interface*/
-  tcp_cmd_init();
+    /* Initialize the tftp server */
+    tftp_server_init();
 
-  /* Initialize Modbus*/
-  modbus_init();
-  
-  /* Initialize the MQTT application */
-  mqtt_application_init();
+    /* Initialize tcp command interface*/
+    tcp_cmd_init();
 
-  // Initialize the UDP broadcast service
+    /* Initialize Modbus*/
+    modbus_init();
 
-  if (udp_broadcast_init(10,255) != ERR_OK){
-      LOG_WARN(TAG,"error initializing udp connection, check warnings from udp_broadcast_init() or udp_broadcast_connection_init()");
-  }
-  if (udp_broadcast_set_owner_details("Joran", "Van Nieuwenhoven") != ERR_OK){
-      LOG_WARN(TAG,"error setting owner's details");
-  }
+    /* Initialize the MQTT application */
+    mqtt_application_init();
 
-  /* USER CODE END 2 */
+    // Initialize the UDP broadcast service
 
-  /* Infinite loop */
-  /* USER CODE BEGIN WHILE */
-  while (1)
-  {
-      /* USER CODE END WHILE */
+    if (udp_broadcast_init(10, 255) != ERR_OK) {
+        LOG_WARN(TAG, "error initializing udp connection, check warnings from udp_broadcast_init() or "
+                      "udp_broadcast_connection_init()");
+    }
+    if (udp_broadcast_set_owner_details("Joran", "Van Nieuwenhoven") != ERR_OK) {
+        LOG_WARN(TAG, "error setting owner's details");
+    }
 
-      /* USER CODE BEGIN 3 */
-      MX_LWIP_Process();
-      lcd_task();
-  }
-  /* USER CODE END 3 */
+    /* Initialize website backend */
+    wbe_init();
+
+    /* USER CODE END 2 */
+
+    /* Infinite loop */
+    /* USER CODE BEGIN WHILE */
+    while (1) {
+        /* USER CODE END WHILE */
+
+        /* USER CODE BEGIN 3 */
+        MX_LWIP_Process();
+        lcd_task();
+    }
+    /* USER CODE END 3 */
 }
 
 /**
-  * @brief System Clock Configuration
-  * @retval None
-  */
-void SystemClock_Config(void)
-{
-  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
-  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+ * @brief System Clock Configuration
+ * @retval None
+ */
+void SystemClock_Config(void) {
+    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
-  /** Configure LSE Drive Capability
-  */
-  HAL_PWR_EnableBkUpAccess();
+    /** Configure LSE Drive Capability
+     */
+    HAL_PWR_EnableBkUpAccess();
 
-  /** Configure the main internal regulator output voltage
-  */
-  __HAL_RCC_PWR_CLK_ENABLE();
-  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+    /** Configure the main internal regulator output voltage
+     */
+    __HAL_RCC_PWR_CLK_ENABLE();
+    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 
-  /** Initializes the RCC Oscillators according to the specified parameters
-  * in the RCC_OscInitTypeDef structure.
-  */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
-  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
-  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
-  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
-  RCC_OscInitStruct.PLL.PLLM = 25;
-  RCC_OscInitStruct.PLL.PLLN = 400;
-  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
-  RCC_OscInitStruct.PLL.PLLQ = 2;
-  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
-  {
-    Error_Handler();
-  }
+    /** Initializes the RCC Oscillators according to the specified parameters
+     * in the RCC_OscInitTypeDef structure.
+     */
+    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+    RCC_OscInitStruct.PLL.PLLM = 25;
+    RCC_OscInitStruct.PLL.PLLN = 400;
+    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+    RCC_OscInitStruct.PLL.PLLQ = 2;
+    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+        Error_Handler();
+    }
 
-  /** Activate the Over-Drive mode
-  */
-  if (HAL_PWREx_EnableOverDrive() != HAL_OK)
-  {
-    Error_Handler();
-  }
+    /** Activate the Over-Drive mode
+     */
+    if (HAL_PWREx_EnableOverDrive() != HAL_OK) {
+        Error_Handler();
+    }
 
-  /** Initializes the CPU, AHB and APB buses clocks
-  */
-  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
-                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
-  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
-  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
-  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
-  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
+    /** Initializes the CPU, AHB and APB buses clocks
+     */
+    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
+    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
+    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
 
-  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_6) != HAL_OK)
-  {
-    Error_Handler();
-  }
+    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_6) != HAL_OK) {
+        Error_Handler();
+    }
 }
 
 /**
-  * @brief DMA2D Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_DMA2D_Init(void)
-{
+ * @brief DMA2D Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_DMA2D_Init(void) {
 
-  /* USER CODE BEGIN DMA2D_Init 0 */
+    /* USER CODE BEGIN DMA2D_Init 0 */
 
-  /* USER CODE END DMA2D_Init 0 */
+    /* USER CODE END DMA2D_Init 0 */
 
-  /* USER CODE BEGIN DMA2D_Init 1 */
+    /* USER CODE BEGIN DMA2D_Init 1 */
 
-  /* USER CODE END DMA2D_Init 1 */
-  hdma2d.Instance = DMA2D;
-  hdma2d.Init.Mode = DMA2D_M2M;
-  hdma2d.Init.ColorMode = DMA2D_OUTPUT_ARGB8888;
-  hdma2d.Init.OutputOffset = 0;
-  hdma2d.LayerCfg[1].InputOffset = 0;
-  hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
-  hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
-  hdma2d.LayerCfg[1].InputAlpha = 0;
-  if (HAL_DMA2D_Init(&hdma2d) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  if (HAL_DMA2D_ConfigLayer(&hdma2d, 1) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  /* USER CODE BEGIN DMA2D_Init 2 */
+    /* USER CODE END DMA2D_Init 1 */
+    hdma2d.Instance = DMA2D;
+    hdma2d.Init.Mode = DMA2D_M2M;
+    hdma2d.Init.ColorMode = DMA2D_OUTPUT_ARGB8888;
+    hdma2d.Init.OutputOffset = 0;
+    hdma2d.LayerCfg[1].InputOffset = 0;
+    hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
+    hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
+    hdma2d.LayerCfg[1].InputAlpha = 0;
+    if (HAL_DMA2D_Init(&hdma2d) != HAL_OK) {
+        Error_Handler();
+    }
+    if (HAL_DMA2D_ConfigLayer(&hdma2d, 1) != HAL_OK) {
+        Error_Handler();
+    }
+    /* USER CODE BEGIN DMA2D_Init 2 */
 
-  /* USER CODE END DMA2D_Init 2 */
+    /* USER CODE END DMA2D_Init 2 */
 
 }
 
 /**
-  * @brief LTDC Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_LTDC_Init(void)
-{
+ * @brief LTDC Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_LTDC_Init(void) {
 
-  /* USER CODE BEGIN LTDC_Init 0 */
+    /* USER CODE BEGIN LTDC_Init 0 */
 
-  /* USER CODE END LTDC_Init 0 */
+    /* USER CODE END LTDC_Init 0 */
 
-  LTDC_LayerCfgTypeDef pLayerCfg = {0};
-  LTDC_LayerCfgTypeDef pLayerCfg1 = {0};
+    LTDC_LayerCfgTypeDef pLayerCfg = {0};
+    LTDC_LayerCfgTypeDef pLayerCfg1 = {0};
 
-  /* USER CODE BEGIN LTDC_Init 1 */
+    /* USER CODE BEGIN LTDC_Init 1 */
 
-  /* USER CODE END LTDC_Init 1 */
-  hltdc.Instance = LTDC;
-  hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
-  hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
-  hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
-  hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
-  hltdc.Init.HorizontalSync = 40;
-  hltdc.Init.VerticalSync = 9;
-  hltdc.Init.AccumulatedHBP = 53;
-  hltdc.Init.AccumulatedVBP = 11;
-  hltdc.Init.AccumulatedActiveW = 533;
-  hltdc.Init.AccumulatedActiveH = 283;
-  hltdc.Init.TotalWidth = 565;
-  hltdc.Init.TotalHeigh = 285;
-  hltdc.Init.Backcolor.Blue = 0;
-  hltdc.Init.Backcolor.Green = 255;
-  hltdc.Init.Backcolor.Red = 0;
-  if (HAL_LTDC_Init(&hltdc) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  pLayerCfg.WindowX0 = 0;
-  pLayerCfg.WindowX1 = 480;
-  pLayerCfg.WindowY0 = 0;
-  pLayerCfg.WindowY1 = 272;
-  pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB1555;
-  pLayerCfg.Alpha = 255;
-  pLayerCfg.Alpha0 = 0;
-  pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
-  pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
-  pLayerCfg.FBStartAdress = 0;
-  pLayerCfg.ImageWidth = 480;
-  pLayerCfg.ImageHeight = 272;
-  pLayerCfg.Backcolor.Blue = 0;
-  pLayerCfg.Backcolor.Green = 0;
-  pLayerCfg.Backcolor.Red = 0;
-  if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  pLayerCfg1.WindowX0 = 0;
-  pLayerCfg1.WindowX1 = 480;
-  pLayerCfg1.WindowY0 = 0;
-  pLayerCfg1.WindowY1 = 272;
-  pLayerCfg1.PixelFormat = LTDC_PIXEL_FORMAT_ARGB1555;
-  pLayerCfg1.Alpha = 255;
-  pLayerCfg1.Alpha0 = 0;
-  pLayerCfg1.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
-  pLayerCfg1.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
-  pLayerCfg1.FBStartAdress = 0;
-  pLayerCfg1.ImageWidth = 480;
-  pLayerCfg1.ImageHeight = 272;
-  pLayerCfg1.Backcolor.Blue = 0;
-  pLayerCfg1.Backcolor.Green = 0;
-  pLayerCfg1.Backcolor.Red = 0;
-  if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg1, 1) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  /* USER CODE BEGIN LTDC_Init 2 */
+    /* USER CODE END LTDC_Init 1 */
+    hltdc.Instance = LTDC;
+    hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
+    hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
+    hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
+    hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
+    hltdc.Init.HorizontalSync = 40;
+    hltdc.Init.VerticalSync = 9;
+    hltdc.Init.AccumulatedHBP = 53;
+    hltdc.Init.AccumulatedVBP = 11;
+    hltdc.Init.AccumulatedActiveW = 533;
+    hltdc.Init.AccumulatedActiveH = 283;
+    hltdc.Init.TotalWidth = 565;
+    hltdc.Init.TotalHeigh = 285;
+    hltdc.Init.Backcolor.Blue = 0;
+    hltdc.Init.Backcolor.Green = 255;
+    hltdc.Init.Backcolor.Red = 0;
+    if (HAL_LTDC_Init(&hltdc) != HAL_OK) {
+        Error_Handler();
+    }
+    pLayerCfg.WindowX0 = 0;
+    pLayerCfg.WindowX1 = 480;
+    pLayerCfg.WindowY0 = 0;
+    pLayerCfg.WindowY1 = 272;
+    pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB1555;
+    pLayerCfg.Alpha = 255;
+    pLayerCfg.Alpha0 = 0;
+    pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
+    pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
+    pLayerCfg.FBStartAdress = 0;
+    pLayerCfg.ImageWidth = 480;
+    pLayerCfg.ImageHeight = 272;
+    pLayerCfg.Backcolor.Blue = 0;
+    pLayerCfg.Backcolor.Green = 0;
+    pLayerCfg.Backcolor.Red = 0;
+    if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK) {
+        Error_Handler();
+    }
+    pLayerCfg1.WindowX0 = 0;
+    pLayerCfg1.WindowX1 = 480;
+    pLayerCfg1.WindowY0 = 0;
+    pLayerCfg1.WindowY1 = 272;
+    pLayerCfg1.PixelFormat = LTDC_PIXEL_FORMAT_ARGB1555;
+    pLayerCfg1.Alpha = 255;
+    pLayerCfg1.Alpha0 = 0;
+    pLayerCfg1.BlendingFactor1 = LTDC_BLENDING_FACTOR1_PAxCA;
+    pLayerCfg1.BlendingFactor2 = LTDC_BLENDING_FACTOR2_PAxCA;
+    pLayerCfg1.FBStartAdress = 0;
+    pLayerCfg1.ImageWidth = 480;
+    pLayerCfg1.ImageHeight = 272;
+    pLayerCfg1.Backcolor.Blue = 0;
+    pLayerCfg1.Backcolor.Green = 0;
+    pLayerCfg1.Backcolor.Red = 0;
+    if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg1, 1) != HAL_OK) {
+        Error_Handler();
+    }
+    /* USER CODE BEGIN LTDC_Init 2 */
 
-  /* USER CODE END LTDC_Init 2 */
+    /* USER CODE END LTDC_Init 2 */
 
 }
 
 /**
-  * @brief QUADSPI Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_QUADSPI_Init(void)
-{
+ * @brief QUADSPI Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_QUADSPI_Init(void) {
 
-  /* USER CODE BEGIN QUADSPI_Init 0 */
+    /* USER CODE BEGIN QUADSPI_Init 0 */
 
-  /* USER CODE END QUADSPI_Init 0 */
+    /* USER CODE END QUADSPI_Init 0 */
 
-  /* USER CODE BEGIN QUADSPI_Init 1 */
+    /* USER CODE BEGIN QUADSPI_Init 1 */
 
-  /* USER CODE END QUADSPI_Init 1 */
-  /* QUADSPI parameter configuration*/
-  hqspi.Instance = QUADSPI;
-  hqspi.Init.ClockPrescaler = 1;
-  hqspi.Init.FifoThreshold = 4;
-  hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
-  hqspi.Init.FlashSize = 16;
-  hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_6_CYCLE;
-  hqspi.Init.ClockMode = QSPI_CLOCK_MODE_0;
-  hqspi.Init.FlashID = QSPI_FLASH_ID_1;
-  hqspi.Init.DualFlash = QSPI_DUALFLASH_DISABLE;
-  if (HAL_QSPI_Init(&hqspi) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  /* USER CODE BEGIN QUADSPI_Init 2 */
+    /* USER CODE END QUADSPI_Init 1 */
+    /* QUADSPI parameter configuration*/
+    hqspi.Instance = QUADSPI;
+    hqspi.Init.ClockPrescaler = 1;
+    hqspi.Init.FifoThreshold = 4;
+    hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
+    hqspi.Init.FlashSize = 16;
+    hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_6_CYCLE;
+    hqspi.Init.ClockMode = QSPI_CLOCK_MODE_0;
+    hqspi.Init.FlashID = QSPI_FLASH_ID_1;
+    hqspi.Init.DualFlash = QSPI_DUALFLASH_DISABLE;
+    if (HAL_QSPI_Init(&hqspi) != HAL_OK) {
+        Error_Handler();
+    }
+    /* USER CODE BEGIN QUADSPI_Init 2 */
 
-  /* USER CODE END QUADSPI_Init 2 */
+    /* USER CODE END QUADSPI_Init 2 */
 
 }
 
 /**
-  * @brief USART1 Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_USART1_UART_Init(void)
-{
+ * @brief USART1 Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_USART1_UART_Init(void) {
 
-  /* USER CODE BEGIN USART1_Init 0 */
+    /* USER CODE BEGIN USART1_Init 0 */
 
-  /* USER CODE END USART1_Init 0 */
+    /* USER CODE END USART1_Init 0 */
 
-  /* USER CODE BEGIN USART1_Init 1 */
+    /* USER CODE BEGIN USART1_Init 1 */
 
-  /* USER CODE END USART1_Init 1 */
-  huart1.Instance = USART1;
-  huart1.Init.BaudRate = 115200;
-  huart1.Init.WordLength = UART_WORDLENGTH_8B;
-  huart1.Init.StopBits = UART_STOPBITS_1;
-  huart1.Init.Parity = UART_PARITY_NONE;
-  huart1.Init.Mode = UART_MODE_TX_RX;
-  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
-  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
-  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
-  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
-  if (HAL_UART_Init(&huart1) != HAL_OK)
-  {
-    Error_Handler();
-  }
-  /* USER CODE BEGIN USART1_Init 2 */
+    /* USER CODE END USART1_Init 1 */
+    huart1.Instance = USART1;
+    huart1.Init.BaudRate = 115200;
+    huart1.Init.WordLength = UART_WORDLENGTH_8B;
+    huart1.Init.StopBits = UART_STOPBITS_1;
+    huart1.Init.Parity = UART_PARITY_NONE;
+    huart1.Init.Mode = UART_MODE_TX_RX;
+    huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+    huart1.Init.OverSampling = UART_OVERSAMPLING_16;
+    huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+    huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+    if (HAL_UART_Init(&huart1) != HAL_OK) {
+        Error_Handler();
+    }
+    /* USER CODE BEGIN USART1_Init 2 */
 
-  /* USER CODE END USART1_Init 2 */
+    /* USER CODE END USART1_Init 2 */
 
 }
 
 /* FMC initialization function */
-static void MX_FMC_Init(void)
-{
+static void MX_FMC_Init(void) {
 
-  /* USER CODE BEGIN FMC_Init 0 */
+    /* USER CODE BEGIN FMC_Init 0 */
 
-  /* USER CODE END FMC_Init 0 */
+    /* USER CODE END FMC_Init 0 */
 
-  FMC_SDRAM_TimingTypeDef SdramTiming = {0};
+    FMC_SDRAM_TimingTypeDef SdramTiming = {0};
 
-  /* USER CODE BEGIN FMC_Init 1 */
+    /* USER CODE BEGIN FMC_Init 1 */
 
-  /* USER CODE END FMC_Init 1 */
+    /* USER CODE END FMC_Init 1 */
 
-  /** Perform the SDRAM1 memory initialization sequence
-  */
-  hsdram1.Instance = FMC_SDRAM_DEVICE;
-  /* hsdram1.Init */
-  hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
-  hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_8;
-  hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12;
-  hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_16;
-  hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
-  hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_1;
-  hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
-  hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_DISABLE;
-  hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_DISABLE;
-  hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0;
-  /* SdramTiming */
-  SdramTiming.LoadToActiveDelay = 16;
-  SdramTiming.ExitSelfRefreshDelay = 16;
-  SdramTiming.SelfRefreshTime = 16;
-  SdramTiming.RowCycleDelay = 16;
-  SdramTiming.WriteRecoveryTime = 16;
-  SdramTiming.RPDelay = 16;
-  SdramTiming.RCDDelay = 16;
+    /** Perform the SDRAM1 memory initialization sequence
+     */
+    hsdram1.Instance = FMC_SDRAM_DEVICE;
+    /* hsdram1.Init */
+    hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
+    hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_8;
+    hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12;
+    hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_16;
+    hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
+    hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_1;
+    hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
+    hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_DISABLE;
+    hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_DISABLE;
+    hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0;
+    /* SdramTiming */
+    SdramTiming.LoadToActiveDelay = 16;
+    SdramTiming.ExitSelfRefreshDelay = 16;
+    SdramTiming.SelfRefreshTime = 16;
+    SdramTiming.RowCycleDelay = 16;
+    SdramTiming.WriteRecoveryTime = 16;
+    SdramTiming.RPDelay = 16;
+    SdramTiming.RCDDelay = 16;
 
-  if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
-  {
-    Error_Handler( );
-  }
+    if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK) {
+        Error_Handler();
+    }
 
-  /* USER CODE BEGIN FMC_Init 2 */
+    /* USER CODE BEGIN FMC_Init 2 */
 
-  /* USER CODE END FMC_Init 2 */
+    /* USER CODE END FMC_Init 2 */
 }
 
 /**
-  * @brief GPIO Initialization Function
-  * @param None
-  * @retval None
-  */
-static void MX_GPIO_Init(void)
-{
-  GPIO_InitTypeDef GPIO_InitStruct = {0};
-/* USER CODE BEGIN MX_GPIO_Init_1 */
-/* USER CODE END MX_GPIO_Init_1 */
+ * @brief GPIO Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_GPIO_Init(void) {
+    GPIO_InitTypeDef GPIO_InitStruct = {0};
+    /* USER CODE BEGIN MX_GPIO_Init_1 */
+    /* USER CODE END MX_GPIO_Init_1 */
 
-  /* GPIO Ports Clock Enable */
-  __HAL_RCC_GPIOE_CLK_ENABLE();
-  __HAL_RCC_GPIOG_CLK_ENABLE();
-  __HAL_RCC_GPIOB_CLK_ENABLE();
-  __HAL_RCC_GPIOJ_CLK_ENABLE();
-  __HAL_RCC_GPIOD_CLK_ENABLE();
-  __HAL_RCC_GPIOK_CLK_ENABLE();
-  __HAL_RCC_GPIOF_CLK_ENABLE();
-  __HAL_RCC_GPIOI_CLK_ENABLE();
-  __HAL_RCC_GPIOC_CLK_ENABLE();
-  __HAL_RCC_GPIOA_CLK_ENABLE();
-  __HAL_RCC_GPIOH_CLK_ENABLE();
+    /* GPIO Ports Clock Enable */
+    __HAL_RCC_GPIOE_CLK_ENABLE();
+    __HAL_RCC_GPIOG_CLK_ENABLE();
+    __HAL_RCC_GPIOB_CLK_ENABLE();
+    __HAL_RCC_GPIOJ_CLK_ENABLE();
+    __HAL_RCC_GPIOD_CLK_ENABLE();
+    __HAL_RCC_GPIOK_CLK_ENABLE();
+    __HAL_RCC_GPIOF_CLK_ENABLE();
+    __HAL_RCC_GPIOI_CLK_ENABLE();
+    __HAL_RCC_GPIOC_CLK_ENABLE();
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+    __HAL_RCC_GPIOH_CLK_ENABLE();
 
-  /*Configure GPIO pin Output Level */
-  HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_Port, LCD_BL_CTRL_Pin, GPIO_PIN_RESET);
+    /*Configure GPIO pin Output Level */
+    HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_Port, LCD_BL_CTRL_Pin, GPIO_PIN_RESET);
 
-  /*Configure GPIO pin Output Level */
-  HAL_GPIO_WritePin(GPIOI, LED_Pin|LCD_DISP_Pin, GPIO_PIN_RESET);
+    /*Configure GPIO pin Output Level */
+    HAL_GPIO_WritePin(GPIOI, LED_Pin | LCD_DISP_Pin, GPIO_PIN_RESET);
 
-  /*Configure GPIO pin : LCD_BL_CTRL_Pin */
-  GPIO_InitStruct.Pin = LCD_BL_CTRL_Pin;
-  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
-  HAL_GPIO_Init(LCD_BL_CTRL_GPIO_Port, &GPIO_InitStruct);
+    /*Configure GPIO pin : LCD_BL_CTRL_Pin */
+    GPIO_InitStruct.Pin = LCD_BL_CTRL_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+    HAL_GPIO_Init(LCD_BL_CTRL_GPIO_Port, &GPIO_InitStruct);
 
-  /*Configure GPIO pins : LED_Pin LCD_DISP_Pin */
-  GPIO_InitStruct.Pin = LED_Pin|LCD_DISP_Pin;
-  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
-  HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
+    /*Configure GPIO pins : LED_Pin LCD_DISP_Pin */
+    GPIO_InitStruct.Pin = LED_Pin | LCD_DISP_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+    HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
 
-  /*Configure GPIO pin : BUTTON_Pin */
-  GPIO_InitStruct.Pin = BUTTON_Pin;
-  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  HAL_GPIO_Init(BUTTON_GPIO_Port, &GPIO_InitStruct);
+    /*Configure GPIO pin : BUTTON_Pin */
+    GPIO_InitStruct.Pin = BUTTON_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    HAL_GPIO_Init(BUTTON_GPIO_Port, &GPIO_InitStruct);
 
-/* USER CODE BEGIN MX_GPIO_Init_2 */
-/* USER CODE END MX_GPIO_Init_2 */
+    /* USER CODE BEGIN MX_GPIO_Init_2 */
+    /* USER CODE END MX_GPIO_Init_2 */
 }
 
 /* USER CODE BEGIN 4 */
 /* USER CODE END 4 */
 
 /**
-  * @brief  This function is executed in case of error occurrence.
-  * @retval None
-  */
-void Error_Handler(void)
-{
-  /* USER CODE BEGIN Error_Handler_Debug */
-  /* User can add his own implementation to report the HAL error return state */
-  __disable_irq();
-  while (1)
-  {
-  }
-  /* USER CODE END Error_Handler_Debug */
+ * @brief  This function is executed in case of error occurrence.
+ * @retval None
+ */
+void Error_Handler(void) {
+    /* USER CODE BEGIN Error_Handler_Debug */
+    /* User can add his own implementation to report the HAL error return state */
+    __disable_irq();
+    while (1) {
+    }
+    /* USER CODE END Error_Handler_Debug */
 }
 
 #ifdef  USE_FULL_ASSERT

project/Core/Src/modbus_tcp.c

@@ -1,163 +1,594 @@
 /**
  * @file modbus_tcp.c
- *
- * @brief TCP Modbus handler
- * @date Nov 6, 2023
+ * @brief TCP Modbus server
+ * @date Nov 29, 2023
  * @author Obe
+ * @author Lorenz C.
  */
 
-// Includes
-#include "modbus_tcp.h"
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <tcp.h>
+#include "lcd_api.h"
+#include "llfs.h"
+#define LOGGER_LEVEL_ALL
 #include "log.h"
+#include "modbus_tcp.h"
 
-// Defines
-#define MAX_REG          REG_LENGTH
-#define EXTENSION_LENGTH 4
-#define TEXT_LENGTH      200
-#define MULTIPLE_REG     0x10
-#define REG_LENGTH       428
-#define START_DATA       28
-#define MODBUS_MODE      7
+// TCP server constants
+#define TCP_POLL_INTERVAL 10 // About 5 seconds
 
-#define REG_COLOR_B_RED   14
-#define REG_COLOR_B_GREEN 16
-#define REG_COLOR_B_BLUE  18
+// Modbus constants (See Modbus_Application_Protocol_V1_1b3 and Modbus_Messaging_Implementation_Guide_V1_0b)
+#define PDU_MAX_LENGTH 253
+#define ADU_MAX_LENGTH 260
 
-#define REG_COLOR_F_RED   20
-#define REG_COLOR_F_GREEN 22
-#define REG_COLOR_F_BLUE  24
+#define MBAP_HEADER_LENGTH 7
+#define PROTOCOL_ID_MODBUS 0x0000
 
-#define REG_IMAGE_NR 26
+#define WRITE_MULTIPLE_REG_REQ_MIN_LENGTH 5
+#define WRITE_MULTIPLE_REG_RSP_LENGTH     4
+#define WRITE_MULTIPLE_REG_QUANTITY_MIN   0x0001
+#define WRITE_MULTIPLE_REG_QUANTITY_MAX   0x007B // See m
 
-// Global variables
-static char* TAG = "Modbus_TCP"; // Tag used in logs
+#define EXCEPTION_OFFSET 0x80
 
-static struct tcp_pcb* modbus_pcb;
-uint8_t registers[MAX_REG];
-
-// Functions
-static err_t modbus_incoming_data(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err);
-static err_t modbus_accept(void* arg, struct tcp_pcb* pcb, err_t err);
+// Application specific constants
+#define REGISTER_COUNT          208
+#define REG_ADDR_BG_COLOR_RED   0x0000 // 8-bit red background color
+#define REG_ADDR_BG_COLOR_GREEN 0x0001 // 8-bit green background color
+#define REG_ADDR_BG_COLOR_BLUE  0x0002 // 8-bit blue background colo
+#define REG_ADDR_FG_COLOR_RED   0x0003 // 8-bit red text color
+#define REG_ADDR_FG_COLOR_GREEN 0x0004 // 8-bit green text color
+#define REG_ADDR_FG_COLOR_BLUE  0x0005 // 8-bit blue text color
+#define REG_ADDR_IMAGE_NUM      0x0006 // 16-bit image number
+#define REG_ADDR_TEXT           0x0007 // Start of text registers (1 reg / ascii character, null terminated)
+#define REG_SIZE_TEXT           0x00C8 // 200 registers / characters
+#define TEXT_POS_X              10
+#define TEXT_POS_Y              10
+#define IMG_POS_X               0
+#define IMG_POS_Y               75
 
 /**
- * @fn static err_t modbus_incoming_data(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
- * @brief Function that's called when there is a new request on port 502.
- * It handles the incoming data from QModMaster
+ * @brief Error codes for internal use in the modbus tcp server.
  */
-static err_t modbus_incoming_data(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err) {
-    uint8_t counter;
-    char text[TEXT_LENGTH];
-    uint32_t result_background = 0xff000000;
-    uint32_t text_foreground_color = 0xff000000;
-
-    LWIP_UNUSED_ARG(arg); // This is used to prevent a warning
-
-    // Putting underscores in the whole array
-    memset(text, '_', TEXT_LENGTH);
-    text[TEXT_LENGTH - 1] = '\0';
-
-    if (p != NULL) {
-        LOG_INFO(TAG, "data is valid\n");
-        // Process the modbus data
-        tcp_recved(pcb, p->tot_len);
-
-        // Putting the buffer in the register array
-        for (uint16_t i = 0; i < p->tot_len && i < MAX_REG; i++) {
-            registers[i] = ((uint8_t*)p->payload)[i];
-        }
-
-        if (registers[MODBUS_MODE] == MULTIPLE_REG) {
-            // Check if it's a Modbus Write Multiple Registers request (0x10)
-            LOG_INFO(TAG, "in writing multiple register mode\n");
-
-            LOG_INFO(TAG, "Background R:%d G:%d B:%d\nForeground: R:%d G:%d B:%d\nImage Nr: %d",
-                     registers[REG_COLOR_B_RED], registers[REG_COLOR_B_GREEN], registers[REG_COLOR_B_BLUE],
-                     registers[REG_COLOR_F_RED], registers[REG_COLOR_F_GREEN], registers[REG_COLOR_F_BLUE],
-                     registers[REG_IMAGE_NR]);
-
-            counter = 0;
-            for (int i = START_DATA; i < REG_LENGTH; i++) {
-                if (i % 2 == 0) {
-                    text[counter] = registers[i];
-                    counter++;
-                }
-            }
-
-            result_background |= ((uint32_t)registers[REG_COLOR_B_RED]) << 16;
-            result_background |= ((uint32_t)registers[REG_COLOR_B_GREEN]) << 8;
-            result_background |= (uint32_t)registers[REG_COLOR_B_BLUE];
-
-            text_foreground_color |= ((uint32_t)registers[REG_COLOR_F_RED]) << 16;
-            text_foreground_color |= ((uint32_t)registers[REG_COLOR_F_GREEN]) << 8;
-            text_foreground_color |= (uint32_t)registers[REG_COLOR_F_BLUE];
-
-            // Processing the image index
-            size_t number_of_files = llfs_file_count(); // How many files that there are
-
-            if (number_of_files > 0) {
-                llfs_file_t file_list[number_of_files];
-                number_of_files = llfs_file_list(file_list, number_of_files, NULL);
-
-                lcd_clear_text();
-                lcd_clear_images();
-                lcd_stop_all_gifs();
-
-                lcd_display_text(text, 10, 10, text_foreground_color, result_background, LCD_FONT24);
-
-                if (number_of_files < registers[REG_IMAGE_NR]) {
-                    lcd_display_text("FILE NOT IN FILESYSTEM", 10, 75, LCD_RED, LCD_BLACK, LCD_FONT24);
-                } else {
-                    const char* ext = strrchr(file_list[registers[REG_IMAGE_NR] - 1].name, '.');
-                    if (ext == NULL) {
-                        LOG_CRIT(TAG, "No valid extension found");
-                    } else if (strcmp(ext, ".gif") == 0) {
-                        lcd_draw_gif_from_llfs_file(&file_list[registers[REG_IMAGE_NR] - 1], 0, 75);
-                    } else if (strcmp(ext, ".bmp") == 0) {
-                        lcd_draw_img_from_llfs_file(&file_list[registers[REG_IMAGE_NR] - 1], 0, 75);
-                    }
-                }
-            }
-
-        } else {
-            LOG_INFO(TAG, "not in writing multiple register mode!!!\n");
-        }
-    } else if (err == ERR_OK) {
-        tcp_close(pcb); // When everything was ok close the TCP connection
-    }
-    return ERR_OK;
-}
+typedef enum {
+    MB_TCP_ERR_OK,
+    MB_TCP_ERR_FAILED,
+    MB_TCP_ERR_INVALID_ADU,
+    MB_TCP_ERR_INVALID_PROTOCOL_ID,
+    MB_TCP_ERR_INVALID_LENGTH,
+    MB_TCP_ERR_MEM,
+} mb_tcp_err_t;
 
 /**
- * @fn static err_t modbus_accept(void *arg, struct tcp_pcb *pcb, err_t err)
- * @brief Sets the function that's being called when theirs incoming data
+ * @brief Modbus function codes
  */
-static err_t modbus_accept(void* arg, struct tcp_pcb* pcb, err_t err) {
-    LWIP_UNUSED_ARG(arg);
-    LWIP_UNUSED_ARG(err);
-
-    // Sets the priority of a connection.
-    tcp_setprio(pcb, TCP_PRIO_MIN);
-
-    // Sets which function is being called when new data arrives
-    tcp_recv(pcb, modbus_incoming_data);
-
-    return ERR_OK;
-}
+enum {
+    WRITE_MULTIPLE_REGISTERS = 0x10,
+};
 
 /**
- * @fn void modbus_init
- * @brief Initializes the modbus tcp
+ * @brief Modbus exception codes
  */
-void modbus_init(void) {
-    LOG_INFO(TAG, "Initializing");
-    // Creating a new tcp pcb
+typedef enum {
+    ILLEGAL_FUNCTION = 0x01,
+    ILLEGAL_DATA_ADDRESS = 0x02,
+    ILLEGAL_DATA_VALUE = 0x03,
+    SERVER_DEVICE_FAILURE = 0x04,
+    ACKNOWLEDGE = 0x05,
+    SERVER_DEVICE_BUSY = 0x06,
+    MEMORY_PARITY_ERROR = 0x08,
+    GATEWAY_PATH_UNAVAILABLE = 0x0A,
+    GATEWAY_TARGET_DEVICE_FAILED_TO_RESPOND = 0x0B,
+} mb_exception_code_t;
+
+/**
+ * @brief Modbus TCP Application Data Unit (ADU)
+ */
+typedef struct {
+    struct {
+        uint16_t transaction_id;
+        uint16_t protocol_id;
+        uint16_t length;
+        uint8_t unit_id;
+    } mbap_header;
+    uint8_t function_code;
+    uint8_t* data;
+} modbus_tcp_t;
+
+/**
+ * @brief The data fields of the write multiple registers request PDU.
+ * @note The data field is not included in the struct.
+ */
+typedef struct {
+    uint16_t start_address;
+    uint16_t quantity;
+    uint8_t byte_count;
+} write_multiple_reg_req_t;
+
+// Static global variables
+static char* TAG = "Modbus_TCP";           // Tag used in logs
+static uint16_t registers[REGISTER_COUNT]; // The modbus registers
+
+// Function prototypes
+static err_t tcp_accept_cb(void* arg, struct tcp_pcb* new_pcb, err_t err);
+static void tcp_err_cb(void* arg, err_t err);
+static err_t tcp_poll_cb(void* arg, struct tcp_pcb* pcb);
+static err_t tcp_sent_cb(void* arg, struct tcp_pcb* pcb, u16_t len);
+static err_t tcp_recv_cb(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err);
+static mb_tcp_err_t parse_data_to_adu(modbus_tcp_t* adu, uint8_t* data, size_t length);
+static mb_tcp_err_t handle_modbus_request(modbus_tcp_t* req_adu, modbus_tcp_t* rsp_adu);
+static mb_tcp_err_t send_modbus_response(struct tcp_pcb* pcb, modbus_tcp_t* rsp_adu);
+static void handle_mb_func_write_multiple_req(modbus_tcp_t* req_adu, modbus_tcp_t* rsp_adu);
+static void generate_modbus_exception_rsp(modbus_tcp_t* req_adu,
+                                          modbus_tcp_t* rsp_adu,
+                                          mb_exception_code_t exception_code);
+static void modbus_update_app(void);
+static const char* img_num_to_filename(uint16_t img_num);
+static void dump_adu(modbus_tcp_t* adu);
+
+void modbus_tcp_init(void) {
+    struct tcp_pcb* modbus_pcb;
+
+    // Initialize the modbus tcp pcb
     modbus_pcb = tcp_new();
+    if (modbus_pcb == NULL) {
+        LOG_CRIT(TAG, "Failed to create modbus pcb");
+        return;
+    }
 
-    // Bind the modbus_pcb to port 502
-    tcp_bind(modbus_pcb, IP_ADDR_ANY, MODBUSPORT);
+    // Listen on all interfaces (port 502)
+    if (tcp_bind(modbus_pcb, IP_ADDR_ANY, MODBUS_TCP_PORT) != ERR_OK) {
+        LOG_CRIT(TAG, "Failed to bind modbus pcb");
+        return;
+    }
 
+    // Set the state of the pcb to LISTEN
     modbus_pcb = tcp_listen(modbus_pcb);
-    // Set callback function for incoming connections
-    tcp_accept(modbus_pcb, modbus_accept);
-    LOG_INFO(TAG, "initialized");
+    if (modbus_pcb == NULL) {
+        LOG_CRIT(TAG, "Failed to listen on modbus pcb");
+        return;
+    }
+
+    // Set the callback function for incoming connections
+    tcp_accept(modbus_pcb, tcp_accept_cb);
 }
+
+/**
+ * @brief Callback function for incoming connections.
+ *
+ * @param arg not used
+ * @param new_pcb
+ * @param err
+ * @return
+ */
+static err_t tcp_accept_cb(void* arg, struct tcp_pcb* new_pcb, err_t err) {
+    LOG_DEBUG(TAG, "TCP accept");
+
+    if (err != ERR_OK) {
+        LOG_WARN(TAG, "TCP accept failed with error(%d): %s", err, lwip_strerr(err));
+        return err;
+    }
+
+    // Set the callback functions for the new pcb
+    tcp_recv(new_pcb, tcp_recv_cb);
+    tcp_sent(new_pcb, tcp_sent_cb);
+    tcp_err(new_pcb, tcp_err_cb);
+    tcp_poll(new_pcb, tcp_poll_cb, TCP_POLL_INTERVAL);
+
+    return ERR_OK;
+}
+
+/**
+ * @brief Callback function for tcp errors.
+ *
+ * @param arg
+ * @param err
+ */
+static void tcp_err_cb(void* arg, err_t err) {
+    LOG_WARN(TAG, "TCP error(%d): %s", err, lwip_strerr(err));
+}
+
+/**
+ * @brief Callback function for tcp poll.
+ *
+ * This function is called periodically to check if the connection is still alive.
+ * The interval is set by TCP_POLL_INTERVAL.
+ *
+ * @param arg
+ * @param pcb
+ * @return ERR_OK
+ */
+static err_t tcp_poll_cb(void* arg, struct tcp_pcb* pcb) {
+    LOG_DEBUG(TAG, "TCP poll");
+    return ERR_OK;
+}
+
+/**
+ * @brief Callback function for tcp sent.
+ *
+ * Called when sent data has been acknowledged by the remote side.
+ *
+ * @param arg
+ * @param pcb
+ * @param len
+ * @return ERR_OK
+ */
+static err_t tcp_sent_cb(void* arg, struct tcp_pcb* pcb, u16_t len) {
+    LOG_DEBUG(TAG, "TCP data acknowledged");
+    return ERR_OK;
+}
+
+/**
+ * @brief Callback function for tcp receive.
+ *
+ * Called when data has been received.
+ *
+ * @param arg
+ * @param pcb
+ * @param p
+ * @param err
+ * @return
+ */
+static err_t tcp_recv_cb(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err) {
+    modbus_tcp_t mb_req_adu; // Modbus request adu to store the received data in
+
+    LOG_DEBUG(TAG, "TCP data received");
+
+    // Connection closed?
+    if (p == NULL && err == ERR_OK) {
+        LOG_INFO(TAG, "Remote closed connection");
+        return tcp_close(pcb);
+    }
+
+    if (err != ERR_OK) {
+        LOG_WARN(TAG, "TCP data received with error(%d): %s", err, lwip_strerr(err));
+        return ERR_OK;
+    }
+
+    // Copy the data from the pbuf to the modbus request adu
+    mb_tcp_err_t mb_err = parse_data_to_adu(&mb_req_adu, p->payload, p->len);
+    if (mb_err != MB_TCP_ERR_OK) {
+        LOG_WARN(TAG, "Invalid modbus adu received");
+        goto err_adu_read;
+    }
+
+    // Handle the modbus request
+    modbus_tcp_t mb_rsp_adu;
+    handle_modbus_request(&mb_req_adu, &mb_rsp_adu);
+
+    // Tell the tcp stack that we have taken the data
+    tcp_recved(pcb, p->tot_len);
+
+    // Send the modbus response
+    if (send_modbus_response(pcb, &mb_rsp_adu) != MB_TCP_ERR_OK) {
+        LOG_WARN(TAG, "Failed to send modbus response");
+        goto err_rsp_fail;
+    }
+
+err_rsp_fail:
+    free(mb_rsp_adu.data);
+err_adu_read:
+    pbuf_free(p);
+    return ERR_OK;
+}
+
+/**
+ * @brief Parses the given data into the tcp ADU struct.
+ *
+ * This function takes the raw data received and parses it into a modbus TCP Application Data Unit (ADU).
+ *
+ * @note The data field of the ADU still points to the raw data, so it must stay valid until the ADU is no longer
+ * needed.
+ * @todo Store the data in the ADU struct instead of just pointing to it?
+ *
+ * @param[out] adu Pointer to a modbus_tcp_t structure where the parsed ADU will be stored.
+ * @param[in] data Pointer to the raw data received from the modbus TCP server.
+ * @param[in] length Length of the raw data.
+ */
+static mb_tcp_err_t parse_data_to_adu(modbus_tcp_t* adu, uint8_t* data, size_t length) {
+    if (length > ADU_MAX_LENGTH) {
+        LOG_DEBUG(TAG, "Invalid adu length: %d, expected max %d", length, ADU_MAX_LENGTH);
+        return MB_TCP_ERR_INVALID_ADU;
+    }
+    if (length < MBAP_HEADER_LENGTH) {
+        LOG_DEBUG(TAG, "Invalid adu length: %d, expected at least %d", length, MBAP_HEADER_LENGTH);
+        return MB_TCP_ERR_INVALID_ADU;
+    }
+
+    // The adu struct is a one-to-one map of the modbus adu, so we can just copy the data
+    // But modbus fields are big endian, so we need to convert them to little endian
+    adu->mbap_header.transaction_id = (data[0] << 8) | data[1];
+    adu->mbap_header.protocol_id = (data[2] << 8) | data[3];
+    adu->mbap_header.length = (data[4] << 8) | data[5];
+    adu->mbap_header.unit_id = data[6];
+    adu->function_code = data[7];
+    adu->data = &data[8]; // Don't change the data endianness yet, since it's structure is function dependent
+
+    // Correct protocol id?
+    if (adu->mbap_header.protocol_id != PROTOCOL_ID_MODBUS) {
+        LOG_DEBUG(TAG, "Invalid protocol id: %d, expected %d", adu->mbap_header.protocol_id, PROTOCOL_ID_MODBUS);
+        return MB_TCP_ERR_INVALID_PROTOCOL_ID;
+    }
+
+    // Length matches length field?
+    if (adu->mbap_header.length != length - MBAP_HEADER_LENGTH + 1) {
+        LOG_DEBUG(TAG, "Length mismatch: %d, expected %d", adu->mbap_header.length, length - MBAP_HEADER_LENGTH + 1);
+        return MB_TCP_ERR_INVALID_ADU;
+    }
+
+    return MB_TCP_ERR_OK;
+}
+
+/**
+ * @brief Handles the given modbus request and generates a response.
+ *
+ * Handles the given modbus request and generates a response, either a normal response or an exception response.
+ * The response data field is allocated and must be freed by the caller.
+ *
+ * @param[in] req_adu Pointer to the modbus request adu.
+ * @param[out] rsp_adu Pointer to the modbus response adu.
+ * @return MB_TCP_ERR_OK if the request was handled successfully, otherwise an error code.
+ */
+static mb_tcp_err_t handle_modbus_request(modbus_tcp_t* req_adu, modbus_tcp_t* rsp_adu) {
+    // Check if the function code is supported
+    switch (req_adu->function_code) {
+        case WRITE_MULTIPLE_REGISTERS: {
+            LOG_INFO(TAG, "Write multiple registers request received");
+            handle_mb_func_write_multiple_req(req_adu, rsp_adu);
+            break;
+        }
+        default: {
+            LOG_WARN(TAG, "Unsupported function code: %d", req_adu->function_code);
+            generate_modbus_exception_rsp(req_adu, rsp_adu, ILLEGAL_FUNCTION);
+        }
+    }
+
+    return MB_TCP_ERR_OK;
+}
+
+/**
+ * @brief Generates a modbus exception response.
+ *
+ * Generates a modbus exception response based on the given request adu and exception code.
+ * The response data field is allocated and must be freed by the caller.
+ *
+ * @param[in] req_adu The request adu to base the response adu on.
+ * @param[out] rsp_adu The response adu to fill.
+ * @param[in] exception_code The exception code to use.
+ */
+static void generate_modbus_exception_rsp(modbus_tcp_t* req_adu,
+                                          modbus_tcp_t* rsp_adu,
+                                          mb_exception_code_t exception_code) {
+    uint16_t pdu_length = 2; // Function code + exception code
+
+    // Fill the response adu based on the request adu
+    rsp_adu->mbap_header.transaction_id = req_adu->mbap_header.transaction_id;
+    rsp_adu->mbap_header.protocol_id = PROTOCOL_ID_MODBUS;
+    rsp_adu->mbap_header.length = 1 + pdu_length; // 1 for the unit id
+    rsp_adu->mbap_header.unit_id = req_adu->mbap_header.unit_id;
+    rsp_adu->function_code = req_adu->function_code + EXCEPTION_OFFSET;
+
+    // Allocate memory for the exception code
+    rsp_adu->data = malloc(1);
+    if (rsp_adu->data == NULL) {
+        LOG_CRIT(TAG, "Failed to allocate memory for exception code");
+        return;
+    }
+
+    rsp_adu->data[0] = exception_code;
+}
+
+/**
+ * @brief Sends the given modbus response.
+ *
+ * Sends the given modbus response to the given tcp pcb.
+ * A copy of the response data is made, so the response adu data can be freed after this function returns.
+ *
+ * @param[in,out] pcb The tcp pcb to send the response to (same as the pcb used to receive the request).
+ * @param[in] rsp_adu The response adu to send.
+ * @return MB_TCP_ERR_OK if the response was sent successfully, otherwise an error code.
+ */
+static mb_tcp_err_t send_modbus_response(struct tcp_pcb* pcb, modbus_tcp_t* rsp_adu) {
+    uint16_t pdu_length = rsp_adu->mbap_header.length - 1; // Length of the data + 1 (for the unit id)
+    uint16_t adu_length = MBAP_HEADER_LENGTH + pdu_length;
+    uint8_t data[adu_length];
+    err_t err;
+
+    if (pdu_length > PDU_MAX_LENGTH) {
+        LOG_WARN(TAG, "Invalid pdu length: %d, expected less than %d", pdu_length, PDU_MAX_LENGTH);
+        return MB_TCP_ERR_INVALID_ADU;
+    }
+
+    LOG_DEBUG(TAG, "Sending modbus response with length: %d", adu_length);
+
+    // Serialize the adu (little endian -> big endian)
+    data[0] = rsp_adu->mbap_header.transaction_id >> 8;
+    data[1] = rsp_adu->mbap_header.transaction_id & 0xFF;
+    data[2] = rsp_adu->mbap_header.protocol_id >> 8;
+    data[3] = rsp_adu->mbap_header.protocol_id & 0xFF;
+    data[4] = rsp_adu->mbap_header.length >> 8;
+    data[5] = rsp_adu->mbap_header.length & 0xFF;
+    data[6] = rsp_adu->mbap_header.unit_id;
+    data[7] = rsp_adu->function_code;
+
+    // The data should already be in big endian, so we can just copy it
+    memcpy(&data[8], rsp_adu->data, pdu_length - 1); // -1 function code is also in the pdu
+
+    if (adu_length > tcp_sndbuf(pcb)) {
+        LOG_WARN(TAG, "Not enough space in tcp buffer to send modbus response");
+        return MB_TCP_ERR_MEM;
+    }
+
+    // Send the data
+    err = tcp_write(pcb, data, adu_length, TCP_WRITE_FLAG_COPY);
+    if (err != ERR_OK) {
+        LOG_WARN(TAG, "Failed to send modbus response with error(%d): %s", err, lwip_strerr(err));
+        return MB_TCP_ERR_FAILED;
+    }
+
+    return MB_TCP_ERR_OK;
+}
+
+/**
+ * @brief Handles a write multiple registers request.
+ *
+ * Handles a write multiple registers request and generates a response adu accordingly.
+ *
+ * @param[in] req_adu The request adu to handle.
+ * @param[out] rsp_adu The response adu to fill.
+ */
+static void handle_mb_func_write_multiple_req(modbus_tcp_t* req_adu, modbus_tcp_t* rsp_adu) {
+    write_multiple_reg_req_t req_pdu;
+    uint16_t req_data_length = req_adu->mbap_header.length - 2; // -2 for the unit id and function code
+
+    // Request at least enough data for the minimum length?
+    if (req_data_length < WRITE_MULTIPLE_REG_REQ_MIN_LENGTH) {
+        LOG_WARN(TAG, "Invalid write multiple registers request length, not enough data for minimum length");
+        generate_modbus_exception_rsp(req_adu, rsp_adu, ILLEGAL_DATA_VALUE);
+        return;
+    }
+
+    // Map the data to the write multiple registers request struct and convert it to little endian
+    req_pdu.start_address = (req_adu->data[0] << 8) | req_adu->data[1];
+    req_pdu.quantity = (req_adu->data[2] << 8) | req_adu->data[3];
+    req_pdu.byte_count = req_adu->data[4];
+
+    // Request the correct length? Do the byte and register count match?
+    if (req_data_length != WRITE_MULTIPLE_REG_REQ_MIN_LENGTH + req_pdu.byte_count
+        || req_pdu.quantity < WRITE_MULTIPLE_REG_QUANTITY_MIN || req_pdu.quantity > WRITE_MULTIPLE_REG_QUANTITY_MAX
+        || req_pdu.quantity * 2 != req_pdu.byte_count) {
+        LOG_WARN(TAG, "Invalid write multiple registers request length");
+        generate_modbus_exception_rsp(req_adu, rsp_adu, ILLEGAL_DATA_VALUE);
+        return;
+    }
+
+    // Invalid start address or quantity?
+    if (req_pdu.start_address + req_pdu.quantity >= REGISTER_COUNT) {
+        LOG_DEBUG(TAG, "Invalid start address or quantity");
+        generate_modbus_exception_rsp(req_adu, rsp_adu, ILLEGAL_DATA_ADDRESS);
+        return;
+    }
+
+    // Convert the data to register values (big endian -> little endian)
+    for (uint16_t i = 0; i < req_pdu.quantity; i++) {
+        registers[req_pdu.start_address + i] = (req_adu->data[WRITE_MULTIPLE_REG_REQ_MIN_LENGTH + i * 2] << 8)
+                                               | req_adu->data[WRITE_MULTIPLE_REG_REQ_MIN_LENGTH + 1 + i * 2];
+    }
+
+    // Update the application with the new register values
+    modbus_update_app(); // TODO: do this when the request is handled successfully, to avoid timeouts.
+
+    // Fill the response adu based on the request adu
+    rsp_adu->mbap_header.transaction_id = req_adu->mbap_header.transaction_id;
+    rsp_adu->mbap_header.protocol_id = PROTOCOL_ID_MODBUS;
+    rsp_adu->mbap_header.length = 2 + WRITE_MULTIPLE_REG_RSP_LENGTH; // 2 for the unit id and function code
+    rsp_adu->mbap_header.unit_id = req_adu->mbap_header.unit_id;
+    rsp_adu->function_code = req_adu->function_code;
+
+    // Allocate memory for the response data
+    rsp_adu->data = malloc(WRITE_MULTIPLE_REG_RSP_LENGTH);
+    if (rsp_adu->data == NULL) {
+        LOG_CRIT(TAG, "Failed to allocate memory for response data");
+        return;
+    }
+
+    // The response data are the same 4 bytes as the request data
+    memcpy(rsp_adu->data, req_adu->data, WRITE_MULTIPLE_REG_RSP_LENGTH);
+}
+
+/**
+ * @brief Dumps the given ADU to the log.
+ *
+ * @param[in] adu Pointer to the ADU to dump.
+ */
+static void dump_adu(modbus_tcp_t* adu) {
+    LOG_DEBUG(TAG, "Modbus adu:");
+    LOG_DEBUG(TAG, "    Transaction id: %d", adu->mbap_header.transaction_id);
+    LOG_DEBUG(TAG, "    Protocol id: %d", adu->mbap_header.protocol_id);
+    LOG_DEBUG(TAG, "    Length: %d", adu->mbap_header.length);
+    LOG_DEBUG(TAG, "    Unit id: %d", adu->mbap_header.unit_id);
+    LOG_DEBUG(TAG, "    Function code: %d", adu->function_code);
+    LOG_DEBUG(TAG, "    Data: ");
+    for (size_t i = 0; i < adu->mbap_header.length - 2; i++) {
+        LOG_DEBUG(TAG, "     [%d]:%d", i, adu->data[i]);
+    }
+}
+
+/**
+ * @brief Update the application with the new register values
+ */
+static void modbus_update_app(void) {
+    uint32_t text_color; // Text color in ARGB888
+    uint32_t bg_color;   // Background color in ARGB888
+    char text[REG_SIZE_TEXT];
+    const char* filename;
+
+    LOG_INFO(TAG, "Updating application with new register values");
+
+    // Get the colors from the registers
+    text_color = 0xFF000000 | (registers[REG_ADDR_FG_COLOR_RED] << 16) | (registers[REG_ADDR_FG_COLOR_GREEN] << 8)
+                 | registers[REG_ADDR_FG_COLOR_BLUE];
+    bg_color = 0xFF000000 | (registers[REG_ADDR_BG_COLOR_RED] << 16) | (registers[REG_ADDR_BG_COLOR_GREEN] << 8)
+               | registers[REG_ADDR_BG_COLOR_BLUE];
+
+    // Get the text from the registers
+    for (int i = 0; i < REG_SIZE_TEXT; i++) {
+        text[i] = registers[REG_ADDR_TEXT + i];
+    }
+
+    // Get the filename based on the image number register
+    filename = img_num_to_filename(registers[REG_ADDR_IMAGE_NUM]);
+
+    // Clear the screen
+    lcd_clear_images();
+    lcd_clear_text();
+
+    // Display the text
+    lcd_display_text(text, TEXT_POS_X, TEXT_POS_Y, text_color, bg_color, LCD_FONT24);
+
+    // Try to display the image
+    if (filename != NULL) {
+        LOG_DEBUG(TAG, "Displaying image: %s", filename);
+
+        char* ext = strrchr(filename, '.');
+        if (ext == NULL) {
+            LOG_WARN(TAG, "File %s has no valid extension", filename);
+        } else if (strcmp(ext, ".gif") == 0) {
+            lcd_draw_gif_from_fs(filename, IMG_POS_X, IMG_POS_Y);
+        } else if (strcmp(ext, ".bmp") == 0) {
+            lcd_draw_img_from_fs(filename, IMG_POS_X, IMG_POS_Y);
+        } else {
+            LOG_WARN(TAG, "File %s is not a valid img", filename);
+        }
+    } else {
+        LOG_WARN(TAG, "No image found");
+    }
+}
+
+/**
+ * @brief Convert the image number register to a filename
+ *
+ * Converts the image number register to a filename by looking up the file in the filesystem.
+ *
+ * @note This function doesn't check if the file is a valid image file.
+ * So the image number is more a file number.
+ *
+ * @param[in] img_num The image number register
+ * @return The filename of the image or NULL if no file is found
+ */
+static const char* img_num_to_filename(uint16_t img_num) {
+    size_t number_of_files = llfs_file_count();
+
+    LOG_DEBUG(TAG, "Converting image number %d to filename, %d files found", img_num, number_of_files);
+
+    if (number_of_files == 0 || img_num > number_of_files) {
+        LOG_DEBUG(TAG, "No files found or invalid image number: %d", img_num);
+        return NULL;
+    }
+
+    llfs_file_t files[number_of_files];
+    llfs_file_list(files, number_of_files, NULL);
+    return files[img_num].name;
+}

project/Core/Src/mqtt_application.c

@@ -17,24 +17,18 @@
 #include "log.h"
 
 #define ATTEMPT_RECONNECT_AMOUNT 50
-#define PUBLISH_QOS 2
-#define PUBLISH_RETAIN 1
-#define PRINT_XPOS 50
-#define PRINT_YPOS 50
-#define MAX_FILES 20
-#define SERVER_IP4_A 192
-#define SERVER_IP4_B 168
-#define SERVER_IP4_C 69
-#define SERVER_IP4_D 11
-#define SERVER_PORT 1883
+#define PUBLISH_QOS              2
+#define PUBLISH_RETAIN           1
+#define PRINT_XPOS               50
+#define PRINT_YPOS               50
+#define MAX_FILES                20
+#define SERVER_IP4_A             192
+#define SERVER_IP4_B             168
+#define SERVER_IP4_C             69
+#define SERVER_IP4_D             11
+#define SERVER_PORT              1883
 
-typedef enum input_topic {
-    set_text,
-    set_text_color,
-    set_color,
-    set_image,
-    other_topic
-} input_topic_t;
+typedef enum input_topic { set_text, set_text_color, set_color, set_image, other_topic } input_topic_t;
 
 // Function prototypes
 static void mqtt_pub_request_cb(void*, err_t);
@@ -47,7 +41,8 @@ static void mosquitto_connect(mqtt_client_t*);
 static uint32_t color_picker(char*);
 static void create_publish_string(char*, char*, size_t);
 
-// Global variables used in mqtt_incoming_publish_cb and mqtt_incoming_data_cb to give an easy to use ID to the subscribed topics
+// Global variables used in mqtt_incoming_publish_cb and mqtt_incoming_data_cb to give an easy to use ID to the
+// subscribed topics
 static sFONT* font;
 static uint16_t xpos;
 static uint16_t ypos;
@@ -80,9 +75,10 @@ static void publish_data(mqtt_client_t* client, void* arg) {
 
     LOG_DEBUG(TAG, "Entering publish");
 
-    create_publish_string("*.bmp", pub_payload,sizeof(pub_payload));
+    create_publish_string("*.bmp", pub_payload, sizeof(pub_payload));
 
-    err = mqtt_publish(client, "getImageList", pub_payload, strlen(pub_payload), PUBLISH_QOS, PUBLISH_RETAIN, mqtt_pub_request_cb, arg);
+    err = mqtt_publish(client, "getImageList", pub_payload, strlen(pub_payload), PUBLISH_QOS, PUBLISH_RETAIN,
+                       mqtt_pub_request_cb, arg);
     if (err != ERR_OK) {
         LOG_DEBUG(TAG, "Publish err: %d", err);
     }
@@ -90,7 +86,8 @@ static void publish_data(mqtt_client_t* client, void* arg) {
     pub_payload[0] = '\0';
     create_publish_string("*.gif", pub_payload, sizeof(pub_payload));
 
-    err = mqtt_publish(client, "getGifList", pub_payload, strlen(pub_payload), PUBLISH_QOS, PUBLISH_RETAIN, mqtt_pub_request_cb, arg);
+    err = mqtt_publish(client, "getGifList", pub_payload, strlen(pub_payload), PUBLISH_QOS, PUBLISH_RETAIN,
+                       mqtt_pub_request_cb, arg);
     if (err != ERR_OK) {
         LOG_DEBUG(TAG, "Publish err: %d", err);
     }
@@ -142,8 +139,8 @@ static void mqtt_incoming_data_cb(void* arg, const uint8_t* data, uint16_t len,
 
     LOG_INFO(TAG, "Incoming publish payload with length %d, flags %d", len, flags);
     if (!(flags & MQTT_DATA_FLAG_LAST)) {
-       LOG_WARN(TAG, "incoming data too big to fit in buffer.");
-       return;
+        LOG_WARN(TAG, "incoming data too big to fit in buffer.");
+        return;
     }
     memcpy(data_buffer, data, len);
     data_buffer[len] = '\0';

project/Core/Src/tcp_cmd.c

@@ -5,8 +5,8 @@
  */
 #include "tcp_cmd.h"
 
-static uint32_t result_txt = 0xff000000;    // Store text color
-static uint32_t result_bg = 0xff000000;     // Store background color
+static uint32_t result_txt = 0xff000000; // Store text color
+static uint32_t result_bg = 0xff000000;  // Store background color
 
 static void tcp_cmd_close(struct tcp_pcb* pcb) {
     tcp_arg(pcb, NULL);
@@ -36,7 +36,6 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
 
     char* endptr;
 
-
     if (err == ERR_OK && p != NULL) {
         tcp_recved(pcb, p->tot_len);
         pc = (char*)p->payload;
@@ -48,13 +47,15 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
 
         if (!strncmp(tcp_buffer, "help", 4)) {
             check = 1;
-            tcp_write(pcb, "help      : laat lijst zien met alle commando's\r\n"
-                                "text      : geeft tekst mee die op LCD komt (uw_text)\r\n"
-                                "color     : kleur achtergrond van scherm (255 255 255)\r\n"
-                                "textColor : kleur van tekst (255 255 255)\r\n"
-                                "listImages: laat een lijst zien van de mogelijke afbeeldingen\r\n"
-                                "setImage  : veranderd te afbeelding (naam_afbeelding)\r\n"
-                                "exit      : sluit de verbinding\r\n", 354, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
+            tcp_write(pcb,
+                      "help      : laat lijst zien met alle commando's\r\n"
+                      "text      : geeft tekst mee die op LCD komt (uw_text)\r\n"
+                      "color     : kleur achtergrond van scherm (255 255 255)\r\n"
+                      "textColor : kleur van tekst (255 255 255)\r\n"
+                      "listImages: laat een lijst zien van de mogelijke afbeeldingen\r\n"
+                      "setImage  : veranderd te afbeelding (naam_afbeelding)\r\n"
+                      "exit      : sluit de verbinding\r\n",
+                      354, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
         } else if (!strncmp(tcp_buffer, "text ", 5)) {
             size_t i;
             for (i = 0; i < len - 4; i++) {
@@ -64,7 +65,6 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
             lcd_clear_text();
             lcd_display_text(text, 10, 10, result_txt, result_bg, LCD_FONT24);
 
-
             check = 1;
         } else if (!strncmp(tcp_buffer, "color", 5)) {
             for (size_t i = 0; i < 3; i++) {
@@ -96,7 +96,8 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
                 number_of_files = llfs_file_list(file_list, number_of_files, NULL);
 
                 for (size_t i = 0; i < number_of_files; i++) {
-                    tcp_write(pcb, file_list[i].name, strlen(file_list[i].name), TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
+                    tcp_write(pcb, file_list[i].name, strlen(file_list[i].name),
+                              TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
                     tcp_write(pcb, "\r\n", 2, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
                 }
             } else {
@@ -117,7 +118,7 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
 
             number_of_files = llfs_file_count();
 
-            if(number_of_files > 0) {
+            if (number_of_files > 0) {
                 llfs_file_t file_list[number_of_files];
 
                 number_of_files = llfs_file_list(file_list, number_of_files, NULL);
@@ -154,7 +155,8 @@ static err_t tcp_cmd_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t
         }
 
         if (!check && (strncmp(tcp_buffer, "\r\n", 2) != 0)) {
-            tcp_write(pcb, "Onbestaand commando: help voor lijst van commando's\r\n", 53, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
+            tcp_write(pcb, "Onbestaand commando: help voor lijst van commando's\r\n", 53,
+                      TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
         }
 
         pbuf_free(p);
@@ -184,10 +186,12 @@ static err_t tcp_cmd_accept(void* arg, struct tcp_pcb* pcb, err_t err) {
     tcp_recv(pcb, tcp_cmd_recv);
     tcp_err(pcb, NULL);
     tcp_poll(pcb, NULL, 4);
-    tcp_write(pcb, "    Welcom bij de TCP CMD Interface\r\n"
-            "(Typ help voor een lijst van de commando's! X om te sluiten)\r\n"
-            "============================================================\r\n"
-            "User: ", 168, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
+    tcp_write(pcb,
+              "    Welcom bij de TCP CMD Interface\r\n"
+              "(Typ help voor een lijst van de commando's! X om te sluiten)\r\n"
+              "============================================================\r\n"
+              "User: ",
+              168, TCP_WRITE_FLAG_COPY | TCP_WRITE_FLAG_MORE);
     tcp_sent(pcb, NULL);
     return ERR_OK;
 }
@@ -200,4 +204,3 @@ void tcp_cmd_init(void) {
     tcp_pcb = tcp_listen(tcp_pcb);
     tcp_accept(tcp_pcb, tcp_cmd_accept);
 }
-

project/Core/Src/tftp.c

@@ -28,7 +28,10 @@ static void* tftp_open(const char* fname, const char* mode, uint8_t write);
 static void tftp_close(void* handle);
 static int tftp_read(void* handle, void* buf, int bytes);
 static int tftp_write(void* handle, struct pbuf* p);
-static struct tftp_context tftpContext_s = {.open = tftp_open, .close = tftp_close, .read = tftp_read, .write = tftp_write};
+static struct tftp_context tftpContext_s = {.open = tftp_open,
+                                            .close = tftp_close,
+                                            .read = tftp_read,
+                                            .write = tftp_write};
 /**
  * @brief tftp custom file functions to set the offset and read the data
  * @param[in,out] handle Custom file handles
@@ -237,7 +240,7 @@ void init_index(void) {
     for (int i = 0; i < MAX_VIRT_FILES; i++) {
         len += strlen(virt_file[i].name) + 1;
     }
-    void* mem = NULL;   // Pointer for internal use by the llfs library
+    void* mem = NULL; // Pointer for internal use by the llfs library
     llfs_file_t* file;
     while ((file = llfs_next_file(&mem, NULL)) != NULL) {
         len += strlen(file->name) + 1;

project/Core/Src/website_backend.c

@@ -0,0 +1,301 @@
+/**
+ * @file website_backend.h
+ * @brief Backend for the website to operate
+ * @author Toon B.
+ */
+
+// Includes
+#include "website_backend.h"
+
+// Static functions
+static size_t wbe_get_images(char* images_string, size_t file_count_fs);
+static inline void wbe_build_infostring(const llfs_file_t* file_list, char* info_string, const size_t cnt);
+static void wbe_decoding_url(const char* encoded, char* decoded);
+static uint32_t wbe_color_value(const char* rgb);
+
+void wbe_init(void) {
+    httpd_init();
+    LOG_DEBUG("WBE", "Initialize webserver");
+
+    // Set starting LCD screen
+    wbe_display("Please Edit Me !", LCD_GREEN, LCD_BLACK, SD_IMG);
+
+    return;
+}
+
+int fs_open_custom(struct fs_file* file, const char* name) {
+    // Variables
+    llfs_file_t* wanted_file = llfs_file_open(name + 1);
+    size_t buffer_len = 0;
+    static char image_stringbuffer[STR_MAX] = "";
+
+    // The wanted file was found in the filesystem
+    if (wanted_file != NULL) {
+        // Debug info
+        LOG_DEBUG("WBE", "The file : %s was found", wanted_file->name);
+
+        // Give the information about the file to the client
+        file->data = (const char*)wanted_file->data;
+        file->len = (int)wanted_file->len;
+        file->index = (int)wanted_file->len;
+        file->is_custom_file = 1;
+        file->pextension = NULL;
+        file->flags = FS_FILE_FLAGS_HEADER_INCLUDED;
+
+        return 1;
+    }
+
+    /*
+     * The endpoint '/images.info' is called when the client wants to call for the
+     * information string that contains the names of the available images.
+     */
+    if (strncmp(name, "/images.info", strlen("/images.info")) == 0) {
+        // Create the information string for the images in the filesystem
+        buffer_len = wbe_get_images(image_stringbuffer, llfs_file_count());
+
+        // Give the string back to the client
+        file->data = image_stringbuffer;
+        file->len = (int)buffer_len;
+        file->index = (int)buffer_len;
+        file->is_custom_file = 1;
+        file->pextension = NULL;
+        file->flags = FS_FILE_FLAGS_HEADER_INCLUDED;
+
+        return 1;
+    }
+
+    // Endpoint when client wants to send information to the backend
+    if (strncmp(name, "/cgi", 3) == 0) {
+        // Give the original index.html back to the client
+        wanted_file = llfs_file_open("index.html");
+
+        if (wanted_file != NULL) {
+            file->data = (const char*)wanted_file->data;
+            file->len = (int)wanted_file->len;
+            file->index = (int)wanted_file->len;
+            file->is_custom_file = 1;
+            file->pextension = NULL;
+            file->flags = FS_FILE_FLAGS_HEADER_INCLUDED;
+
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+void fs_close_custom(struct fs_file* file) {
+}
+
+/**
+ * @fn void wbe_get_images(char*, size_t)
+ * @brief Function searches filesystem for files with extention ".bmp" and ".gif" and put them
+ * combined in a string that needs to be send to the frontend.
+ *
+ * @param[in] images_string, string that will contain the image names
+ * @param[in] file_count_fs, the number of files in the filesystem
+ */
+static size_t wbe_get_images(char* images_string, size_t file_count_fs) {
+    // Allocate space for the files
+    llfs_file_t file_list[file_count_fs];
+
+    size_t file_count_bmp = 0;
+    size_t file_count_gif = 0;
+
+    // Reset string
+    strcpy(images_string, "");
+
+    // Get all the ".bmp" and ".gif" files
+    file_count_bmp = llfs_file_list(file_list, file_count_fs, ".bmp");
+    file_count_gif = llfs_file_list(file_list + file_count_bmp, file_count_fs, ".gif");
+
+    // Create the info string
+    wbe_build_infostring(file_list, images_string, file_count_gif + file_count_bmp);
+
+    // Debug info
+    LOG_DEBUG("WBE", "Images string : %s ", images_string);
+
+    // Return the length of the string
+    return strlen(images_string);
+}
+
+/**
+ * @fn void wbe_build_infostring(const llfs_file_t*, char*, const size_t)
+ * @brief Function adds the names of the files in "file_list" and adds them in "infoStr".
+ * The names are seperated by '|' characters.
+ *
+ * @param[in] file_list, list with files
+ * @param[in] info_string, string that will contain the filenames
+ * @param[in] cnt, the number of files
+ */
+static inline void wbe_build_infostring(const llfs_file_t* file_list, char* info_string, const size_t cnt) {
+    // Add the filenames to the info string
+    for (size_t i = 0; i < cnt; ++i) {
+        strncat(info_string, file_list[i].name, strlen(file_list[i].name));
+        strncat(info_string, "|", 2);
+    }
+
+    // Remove last seperator '|'
+    info_string[strlen(info_string) - 1] = '\0';
+}
+
+void httpd_cgi_handler(struct fs_file* file, const char* uri, int num_parm, char** pc_param, char** pc_value) {
+    // Variables
+    uint32_t vktxt = LCD_GREEN;
+    uint32_t vka = LCD_BLACK;
+
+    // Allocate space for parameters
+    char vtxt[STR_MAX];    // The sentence that we want to print on the LCD.
+    char vfo[STR_MAX];     // Name of the selected image on the website.
+    char s_vktxt[CLR_MAX]; // The color of the sentence. (in #RGB)
+    char s_vka[CLR_MAX];   // Color of the background. (also in #RGB)
+
+    if (strcmp("/cgi", uri) == 0) {
+        for (size_t i = 0; i < num_parm; ++i) {
+            // The given sentence
+            if (strcmp("vtxt", pc_param[i]) == 0) {
+                wbe_decoding_url(pc_value[i], vtxt);
+            }
+
+            // The color of the sentence
+            if (strcmp("vktxt", pc_param[i]) == 0) {
+                wbe_decoding_url(pc_value[i], s_vktxt);
+
+                // Convert to hex value
+                if (s_vktxt != NULL) {
+                    vktxt = wbe_color_value(s_vktxt);
+                }
+            }
+
+            // Color of the background
+            if (strcmp("vka", pc_param[i]) == 0) {
+                wbe_decoding_url(pc_value[i], s_vka);
+
+                // convert to hex value
+                if (s_vka != NULL) {
+                    vka = wbe_color_value(s_vka);
+                }
+            }
+
+            // Name of the image
+            if (strcmp("vfo", pc_param[i]) == 0) {
+                wbe_decoding_url(pc_value[i], vfo);
+            }
+        }
+
+        // Debug info
+        LOG_DEBUG("WBE", "CGI DATA : %s , %x , %x , %s", vtxt, vktxt, vka, vfo);
+
+        // Display on LCD
+        wbe_display(vtxt, vktxt, vka, vfo);
+    }
+}
+
+/**
+ * @fn void wbe_decoding_url(const char*, char*)
+ * @brief The given information from the CGI parameters are URL encoded.
+ * This function translates this encoded string in a readable
+ * decoded string. The lengthe of "char* decoded" is at least the
+ * length of "char* encoded" + 1.
+ *
+ * @param[in] encoded, the encoded URL string that needs to be decoded
+ * @param[in] decoded, string that will contain the decoded URL.
+ */
+static void wbe_decoding_url(const char* encoded, char* decoded) {
+    // Variables
+    char* endptr;
+    size_t decoded_index = 0;
+    size_t encoded_length = strlen(encoded);
+    uint32_t hex_val;
+
+    for (size_t i = 0; i < encoded_length; ++i) {
+        // If we encounter a %xx, decode it to ascii
+        if ((encoded[i] == '%') && (i + 2 < encoded_length)) {
+            // Decode %xx
+            hex_val = (uint32_t)strtoul(&encoded[i + 1], &endptr, 16);
+
+            // Check for conversion errors
+            if (endptr == &encoded[i + 1] || *endptr != '\0') {
+                LOG_DEBUG("WBE", "URL text conversion error");
+            }
+
+            decoded[decoded_index++] = (char)hex_val;
+
+            // Skip 2 characters
+            i += 2;
+
+            // If we encounter a +, add a space character
+        } else if (encoded[i] == '+') {
+            decoded[decoded_index++] = ' ';
+
+            // If no % or +, just put what stands in 'encoded'
+        } else {
+            decoded[decoded_index++] = encoded[i];
+        }
+    }
+
+    // Finish the string
+    decoded[decoded_index] = '\0';
+}
+
+static uint32_t wbe_color_value(const char* rgb) {
+    // Variables
+    char* endptr;
+    uint32_t color = LCD_BLACK;
+    char argb[11] = "0xff";
+
+    // Create argb string (also, skip the '#' char)
+    strncat(argb, rgb + 1, strlen(rgb + 1));
+
+    // Get argb value
+    color = (uint32_t)strtoul(argb, &endptr, 16);
+
+    // Check for conversion errors
+    if (*endptr != '\0') {
+        color = LCD_BLACK;
+        LOG_DEBUG("WBE", "URL color conversion error");
+    }
+
+    return color;
+}
+
+void wbe_display(const char* txt, const uint32_t txt_color, const uint32_t bg_color, const char* image) {
+    // Variables
+    lcd_gif_t* gif;
+    const char* extension;
+
+    // clear the screen
+    lcd_clear_text();
+    lcd_clear_images();
+
+    // Display the text and the background
+    lcd_set_bg_color_layer0(bg_color);
+    lcd_display_text(txt, 10, 10, txt_color, bg_color, LCD_FONT16);
+
+    // Get the extension of the file
+    extension = llfs_get_filename_ext(image);
+
+    // Check extension
+    if (extension != NULL) {
+        // Draw bmp
+        if (strcmp(extension, "bmp") == 0) {
+            lcd_draw_img_from_fs(image, IMG_X, IMG_Y);
+
+            // Draw gif
+        } else if (strcmp(extension, "gif") == 0) {
+            gif = lcd_draw_gif_from_fs(image, IMG_X, IMG_Y);
+
+            if (gif == NULL) {
+                LOG_DEBUG("WBE", "GIF could not be drawn");
+            }
+
+            // If nothing, then draw the standard image
+        } else {
+            lcd_draw_img_from_fs(SD_IMG, IMG_X, IMG_Y);
+        }
+
+        // If nothing, then draw the standard image
+    } else {
+        lcd_draw_img_from_fs(SD_IMG, IMG_X, IMG_Y);
+    }
+}

tests/CMakeLists.txt

@@ -17,9 +17,10 @@ target_compile_definitions(tests
 target_sources(tests
     PRIVATE
     ${TEST_SOURCES}
-    ../project/Core/Src/tftp.c
-    ../project/Core/Src/llfs_data.c
-    ../project/Core/Src/llfs.c
+    ${CMAKE_SOURCE_DIR}
+    ${CMAKE_SOURCE_DIR}/project/Core/Src/llfs_data.c
+    ${CMAKE_SOURCE_DIR}/project/Core/Src/llfs.c
+    ${CMAKE_SOURCE_DIR}/project/Core/Src/tftp.c
 )
 
 target_compile_options(tests PRIVATE $<$<CONFIG:Debug>:
@@ -35,7 +36,7 @@ target_include_directories(tests
     PUBLIC
     ${CMAKE_CURRENT_LIST_DIR}
     ${PROJECT_BINARY_DIR}
-    ../project/Core/Inc/
+    ${CMAKE_SOURCE_DIR}/project/Core/Inc/
 )
 
 include(GoogleTest)

tests/mocs.c

@@ -12,7 +12,12 @@ int tftp_init(struct tftp_context* context) {
     return 0;
 }
 
-void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT* font) {
+void lcd_display_text(const char* text,
+                      uint16_t x_pos,
+                      uint16_t y_pos,
+                      uint32_t color,
+                      uint32_t bg_color,
+                      sFONT* font) {
     UNUSED(color);
     UNUSED(bg_color);
     UNUSED(font);
@@ -54,19 +59,19 @@ struct tcp_pcb* tcp_new(void) {
     return NULL;
 }
 
-err_t tcp_bind(void *pcb, void *ipaddr, uint16_t port) {
+err_t tcp_bind(void* pcb, void* ipaddr, uint16_t port) {
     UNUSED(pcb);
     UNUSED(ipaddr);
     UNUSED(port);
     return ERR_OK;
 }
 
-struct tcp_pcb* tcp_listen(void *pcb) {
+struct tcp_pcb* tcp_listen(void* pcb) {
     UNUSED(pcb);
     return NULL;
 }
 
-void tcp_accept(void *pcb, tcp_accept_fn arg) {
+void tcp_accept(void* pcb, tcp_accept_fn arg) {
     UNUSED(pcb);
     UNUSED(arg);
 }

tests/mocs.h

@@ -4,8 +4,8 @@
 extern "C" {
 #endif
 
-#include <stdlib.h>
 #include <stdint.h>
+#include <stdlib.h>
 
 #ifndef UNUSED
 #define UNUSED(x) (void)(x)
@@ -16,53 +16,53 @@ extern "C" {
 typedef int8_t err_t;
 /** Definitions for error constants. */
 typedef enum {
-/** No error, everything OK. */
-  ERR_OK         = 0,
-/** Out of memory error.     */
-  ERR_MEM        = -1,
-/** Buffer error.            */
-  ERR_BUF        = -2,
-/** Timeout.                 */
-  ERR_TIMEOUT    = -3,
-/** Routing problem.         */
-  ERR_RTE        = -4,
-/** Operation in progress    */
-  ERR_INPROGRESS = -5,
-/** Illegal value.           */
-  ERR_VAL        = -6,
-/** Operation would block.   */
-  ERR_WOULDBLOCK = -7,
-/** Address in use.          */
-  ERR_USE        = -8,
-/** Already connecting.      */
-  ERR_ALREADY    = -9,
-/** Conn already established.*/
-  ERR_ISCONN     = -10,
-/** Not connected.           */
-  ERR_CONN       = -11,
-/** Low-level netif error    */
-  ERR_IF         = -12,
+    /** No error, everything OK. */
+    ERR_OK = 0,
+    /** Out of memory error.     */
+    ERR_MEM = -1,
+    /** Buffer error.            */
+    ERR_BUF = -2,
+    /** Timeout.                 */
+    ERR_TIMEOUT = -3,
+    /** Routing problem.         */
+    ERR_RTE = -4,
+    /** Operation in progress    */
+    ERR_INPROGRESS = -5,
+    /** Illegal value.           */
+    ERR_VAL = -6,
+    /** Operation would block.   */
+    ERR_WOULDBLOCK = -7,
+    /** Address in use.          */
+    ERR_USE = -8,
+    /** Already connecting.      */
+    ERR_ALREADY = -9,
+    /** Conn already established.*/
+    ERR_ISCONN = -10,
+    /** Not connected.           */
+    ERR_CONN = -11,
+    /** Low-level netif error    */
+    ERR_IF = -12,
 
-/** Connection aborted.      */
-  ERR_ABRT       = -13,
-/** Connection reset.        */
-  ERR_RST        = -14,
-/** Connection closed.       */
-  ERR_CLSD       = -15,
-/** Illegal argument.        */
-  ERR_ARG        = -16
+    /** Connection aborted.      */
+    ERR_ABRT = -13,
+    /** Connection reset.        */
+    ERR_RST = -14,
+    /** Connection closed.       */
+    ERR_CLSD = -15,
+    /** Illegal argument.        */
+    ERR_ARG = -16
 } err_enum_t;
 
 struct pbuf {
-  struct pbuf *next;
-  void *payload;
-  uint16_t tot_len;
-  uint16_t len;
-  uint8_t type_internal;
-  uint8_t flags;
-  //LWIP_PBUF_REF_T ref;
+    struct pbuf* next;
+    void* payload;
+    uint16_t tot_len;
+    uint16_t len;
+    uint8_t type_internal;
+    uint8_t flags;
+    // LWIP_PBUF_REF_T ref;
 
-  uint8_t if_idx;
+    uint8_t if_idx;
 };
 
 struct tcp_pcb {
@@ -70,10 +70,10 @@ struct tcp_pcb {
 };
 typedef void sFONT;
 
-#define ERR_OK 0
+#define ERR_OK          0
 #define LCD_COLOR_BLACK 0
 #define LCD_COLOR_WHITE 1
-#define LCD_TRANSPARENT   2
+#define LCD_TRANSPARENT 2
 
 #define LCD_FONT16 0
 #define LCD_FONT24 (void*)1
@@ -86,14 +86,13 @@ typedef void sFONT;
 #define TCP_PRIO_MAX    127
 #define IP_ADDR_ANY     0
 
-typedef err_t (*tcp_recv_fn)(void *arg, struct tcp_pcb *tpcb,
-                             struct pbuf *p, err_t err);
-                            
-typedef err_t (*tcp_accept_fn)(void *arg, struct tcp_pcb *newpcb, err_t err);
+typedef err_t (*tcp_recv_fn)(void* arg, struct tcp_pcb* tpcb, struct pbuf* p, err_t err);
+
+typedef err_t (*tcp_accept_fn)(void* arg, struct tcp_pcb* newpcb, err_t err);
 
 uint32_t logger_get_timestamp(void);
 
-void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT *font);
+void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT* font);
 void lcd_draw_img_from_fs(char* filename, uint32_t x_pos, uint32_t y_pos);
 void lcd_draw_gif_from_fs(char* filename, uint32_t x_pos, uint32_t y_pos);
 void lcd_draw_bmp_img(uint8_t* bmp_buff, uint32_t x_pos, uint32_t y_pos);
@@ -103,23 +102,23 @@ void lcd_clear_images(void);
 void lcd_clear_text(void);
 
 struct tcp_pcb* tcp_new(void);
-err_t tcp_bind(void *pcb, void *ipaddr, uint16_t port);
-struct tcp_pcb* tcp_listen(void *pcb);
-void tcp_accept(void *pcb, tcp_accept_fn arg);
-void tcp_arg(void *pcb, void *arg);
-void tcp_sent(void *pcb, void *arg);
-void tcp_recv(void *pcb, tcp_recv_fn arg);
-void tcp_setprio(void *pcb, uint8_t prio);
-void tcp_err(void *pcb, void* err);
-void tcp_poll(void *pcb, void* poll, uint8_t interval);
-void tcp_close(void *pcb);
+err_t tcp_bind(void* pcb, void* ipaddr, uint16_t port);
+struct tcp_pcb* tcp_listen(void* pcb);
+void tcp_accept(void* pcb, tcp_accept_fn arg);
+void tcp_arg(void* pcb, void* arg);
+void tcp_sent(void* pcb, void* arg);
+void tcp_recv(void* pcb, tcp_recv_fn arg);
+void tcp_setprio(void* pcb, uint8_t prio);
+void tcp_err(void* pcb, void* err);
+void tcp_poll(void* pcb, void* poll, uint8_t interval);
+void tcp_close(void* pcb);
 
-void tcp_write(void *pcb, const char *data, size_t len, uint8_t apiflags);
-void tcp_output(void *pcb);
-void tcp_recved(void *pcb, uint16_t len);
+void tcp_write(void* pcb, const char* data, size_t len, uint8_t apiflags);
+void tcp_output(void* pcb);
+void tcp_recved(void* pcb, uint16_t len);
 void pbuf_free(struct pbuf* p);
 
-size_t tcp_sndbuf(void *pcb);
+size_t tcp_sndbuf(void* pcb);
 
 #ifdef __cplusplus
 }

tests/tfpt_tests.cpp

@@ -1,47 +1,35 @@
 #include <gtest/gtest.h>
 #include <stdint.h>
-#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "mocs.h"
 #include "tftp.h"
 
-tftp_custom_file_t file = {
-        .data = (char*)"1234567890",
-        .len = 11,
-        .name = (char*)"test.txt",
-        .offset = 0
-    };
-tftp_custom_file_t write_file = {
-        .data = NULL,
-        .len = 0,
-        .name = (char*)"test.txt",
-        .offset = 0
-    };
+tftp_custom_file_t file = {.data = (char*)"1234567890", .len = 11, .name = (char*)"test.txt", .offset = 0};
+tftp_custom_file_t write_file = {.data = NULL, .len = 0, .name = (char*)"test.txt", .offset = 0};
 
-TEST(TFTP, custom_fseek)
-{    
+TEST(TFTP, custom_fseek) {
     tftp_custom_fseek(&file, 5, SEEK_SET);
     EXPECT_EQ(file.offset, 5);
     tftp_custom_fseek(&file, 5, SEEK_CUR);
     EXPECT_EQ(file.offset, 10);
 }
 
-TEST(TFTP, custom_fread)
-{
+TEST(TFTP, custom_fread) {
     char buf[11];
     tftp_custom_fseek(&file, 0, SEEK_SET);
     size_t bytes = tftp_custom_fread(buf, 11, &file);
-    EXPECT_EQ(bytes, 10);
-    EXPECT_EQ(file.offset, 10);
+    EXPECT_EQ(bytes, 11);
+    EXPECT_EQ(file.offset, 11);
     EXPECT_EQ(memcmp(buf, "1234567890", 10), 0);
 
     memset(buf, 0, 11);
 
     tftp_custom_fseek(&file, 0, SEEK_SET);
     bytes = tftp_custom_fread(buf, 11, &file);
-    EXPECT_EQ(bytes, 10);
+    EXPECT_EQ(bytes, 11);
     EXPECT_EQ(memcmp(buf, "1234567890", 10), 0);
 
     memset(buf, 0, 11);

tests/tftp_server.h

@@ -4,15 +4,15 @@
 extern "C" {
 #endif
 
-#include <stdlib.h>
 #include <stdint.h>
+#include <stdlib.h>
 #include "mocs.h"
 
 struct tftp_context {
-  void* (*open)(const char* fname, const char* mode, uint8_t write);
-  void (*close)(void* handle);
-  int (*read)(void* handle, void* buf, int bytes);
-  int (*write)(void* handle, struct pbuf* p);
+    void* (*open)(const char* fname, const char* mode, uint8_t write);
+    void (*close)(void* handle);
+    int (*read)(void* handle, void* buf, int bytes);
+    int (*write)(void* handle, struct pbuf* p);
 };
 
 void tftp_cleanup(void);