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Merge pull request #9 from Sani7/LCD_API

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Lcd api
This commit is contained in:
Sander Speetjens
2023-11-12 16:10:59 +01:00
committed by GitHub
parent e52be0e25e 142f93a7db
commit 56554dd337
10 changed files with 2594 additions and 23 deletions
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16
.gitignore vendored
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@@ -31,6 +31,18 @@
*.out
*.app
# Log files
*.log
# Metadata directories
.metadata/
project/.metadata
# Test files
project/Core/Inc/stlogo.h
project/Core/Inc/test_img.h
project/Core/Inc/test_data.h
project/Debug/
project/.idea/
@@ -42,3 +54,7 @@ project/.settings/
project/.mxproject
project/project.launch
project/Scripts
Scripts/
project/project\ Debug.launch

92
docs/lcd_api.md Normal file
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@@ -0,0 +1,92 @@
# LCD API
## Introduction
The LCD API can be used to display BMP images or text onto the LCD screen.
At the moment of writing, only BMP's in C array's are supported.
Supported color schemes for BMP's are ARGB8888, RGB565, RGB888.
Displayed text that is exceeds the LCD width size, will be wrapped onto the next line and a '-' character will be injected if the wrap occurs within a word.
## Usage of LCD API
### Generating BMP C header files
#### Resizing images
To resize an image to the desired size (width and height), one can use an image editor such as Photoshop, GIMP, ImageMagick, ... .
For example, using ImageMagick:
```bash
convert in.png -resize 10% BMP3:out.bmp
#OR (depending on the version of ImageMagick)
magick in.png -resize 50x50 out.png
```
The resize option can both be used to resize in percentages or in pixels.
The BMP3 option is used to convert the PNG to Bitmap version 3.0 (note that the BMP header will still be present in the output image).
#### Generating the C array
To easily generate a BMP C array (in the desired color scheme) from an image, [lv_img_conv](https://github.com/lvgl/lv_img_conv) can be used.
See the installation instructions on Github or use the [online version](https://lvgl.io/tools/imageconverter).
Example:
```bash
./lv_img_conv.js test.png -f -c CF_TRUE_COLOR
```
The command above will generate a .c file in which arrays can be found for RGB332, RGB565, ARGB8888. It is also possible to generate a binary BMP image file in ARGB8332, ARGB8565, ARGB8565_RBSWAP, ARGB8888.
```bash
./lv_img_conv.js logo_lvgl.png -f -c CF_TRUE_COLOR -t bin --binary-format ARGB8888
```
### Using the LCD API
#### Initialization of LCD API
The `lcd_init(bool bl_on)` function initialises the LCD screen. The `bl_on` variable allows to enable or disable the LCD backlight.
```c
#include "lcd_api.h"
...
void main(void) {
...
lcd_init(true);
...
}
```
#### Drawing text on the screen
```c
void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT *font);
```
```c
#include "lcd_api.h"
...
void main(void) {
...
lcd_init(true);
...
lcd_display_text("This is a text string.", 10, 10, LCD_GREEN, LCD_BLACK, LCD_FONT16);
}
```
Display text on the LCD screen in a certain color. When text width exceeds BSP_LCD_GetXSize(), a text wrap will be performed. If the text wrap is between two will be injected.
#### Drawing a BMP (C-array) onto the screen
```c
void lcd_draw_bmp(const void* p_src, uint32_t x_pos, uint32_t y_pos, uint32_t x_size, uint32_t y_size, uint32_t color_mode);
```
```c
#include "lcd_api.h"
#include "test_image.h"
void main(void) {
...
lcd_init(true);
...
lcd_draw_bmp(bmp_array, 0, 0, 50, 50, LCD_ARGB8888);
}
```
Draw BMP image from C array to the LCD screen at position X, Y. In color mode ARGB8888, RGB888, RGB565 or ARGB1555 Supports ARGB8888, RGB565, RGB888 (see LCD_* defines in header file).

39
project/.cproject
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@@ -24,7 +24,7 @@
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@@ -91,11 +91,12 @@
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@@ -117,28 +118,28 @@
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<tool id="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.linker.611884646" name="MCU GCC Linker" superClass="com.st.stm32cube.ide.mcu.gnu.managedbuild.tool.c.linker">
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<additionalInput kind="additionalinputdependency" paths="$(USER_OBJS)"/>
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2281
project/Core/Inc/fsdata_custom.c Normal file
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File diff suppressed because it is too large Load Diff

96
project/Core/Inc/lcd_api.h Normal file
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@@ -0,0 +1,96 @@
/**
* @file lcd_api.h
* @brief API for LCD functionality
* @author Tim S.
*/
#ifndef INC_LCD_API_H_
#define INC_LCD_API_H_
#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include "../../Drivers/BSP/STM32746G-Discovery/stm32746g_discovery_lcd.h"
#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_FONT8 &Font8
#define LCD_FONT12 &Font12
#define LCD_FONT16 &Font16
#define LCD_FONT20 &Font20
#define LCD_FONT24 &Font24
extern LTDC_HandleTypeDef hLtdcHandler;
/**
* @brief Initialise LCD
* Initialise the LCD screen with BackLight on or not
*
* @param[in] bl_on Bool to enable or disable the LCD backlight
*
*/
void lcd_init(bool bl_on);
/**
* @brief Display text
* Display text on the LCD screen in a certain color. When text width exceeds BSP_LCD_GetXSize(),
* a text wrap will be performed. If the text wrap is between two letters in a word, the '-' character
* will be injected.
*
* @param[in] text C-style text string to display on the LCD screen
* @param[in] x_pos X-position
* @param[in] y_pos Y-position
* @param[in] color Color in which the text will be displayed, see preset colors in defines above
* @param[in] bg_color Background color for the text
* @param[in] font Font size, see defines above in file
*/
void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT *font);
/**
* @brief Draw BMP image on screen
* Draw BMP image from C array to the LCD screen at position X, Y. In color mode ARGB8888, RGB888, RGB565 or ARGB1555
* Supports ARGB8888, RGB565, RGB888
*
* @author Wim Dams
*
* @param[in] p_src C array containing the image data
* @param[in] x_pos X-position
* @param[in] y_pos Y-position
* @param[in] x_size Width of image
* @param[in] y_size Height of image
* @param[in] color_mode Color mode (see defined color modes above in file)
*/
void lcd_draw_bmp(const void* p_src, uint32_t x_pos, uint32_t y_pos, uint32_t x_size, uint32_t y_size, uint32_t color_mode);
#endif /* INC_LCD_API_H_ */

1
project/Core/Inc/main.h
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@@ -31,6 +31,7 @@ extern "C" {
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "../../Drivers/BSP/STM32746G-Discovery/stm32746g_discovery_lcd.h"
/* USER CODE END Includes */

83
project/Core/Src/lcd_api.c Normal file
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@@ -0,0 +1,83 @@
/**
* @file lcd_api.c
* @brief LCD API implementation
* @author Tim S.
* @todo Implement function to read images from fs
*/
#include "lcd_api.h"
static DMA2D_HandleTypeDef hDma2dHandler2;
void lcd_init(bool bl_on) {
BSP_LCD_Init();
BSP_LCD_LayerDefaultInit(1, LCD_FB_START_ADDRESS);
BSP_LCD_LayerDefaultInit(0, LCD_FB_START_ADDRESS + (BSP_LCD_GetXSize()*BSP_LCD_GetYSize()*4));
BSP_LCD_SelectLayer(0);
BSP_LCD_Clear(LCD_COLOR_BLACK);
BSP_LCD_SelectLayer(1);
BSP_LCD_Clear(LCD_COLOR_BLACK);
if (bl_on) {
HAL_GPIO_WritePin(GPIOK, GPIO_PIN_3, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOI, GPIO_PIN_12, GPIO_PIN_SET);
} else {
HAL_GPIO_WritePin(GPIOK, GPIO_PIN_3, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOI, GPIO_PIN_12, GPIO_PIN_RESET);
}
}
void lcd_display_text(const char* text, uint16_t x_pos, uint16_t y_pos, uint32_t color, uint32_t bg_color, sFONT *font) {
uint16_t tot_length = x_pos + (strlen(text) * font->Width);
if ((x_pos % font->Width) != 0) {
x_pos -= (x_pos % font->Width);
}
BSP_LCD_SetTextColor(color);
BSP_LCD_SetBackColor(bg_color);
BSP_LCD_SetFont(font);
if (tot_length > BSP_LCD_GetXSize()) {
for (int i = 0; i < strlen(text); i++) {
if ((x_pos) > BSP_LCD_GetXSize() - (font->Width)*2) {
if (isalpha(text[i-1]) && isalpha(text[i])) {
BSP_LCD_DisplayChar(x_pos, y_pos, '-');
i -= 1;
}
x_pos = 0;
y_pos += font->Height;
} else {
BSP_LCD_DisplayChar(x_pos, y_pos, text[i]);
x_pos += font->Width;
}
}
} else {
BSP_LCD_DisplayStringAt(x_pos, y_pos, text, LEFT_MODE);
}
}
void lcd_draw_bmp(const void* p_src, uint32_t x_pos, uint32_t y_pos, uint32_t x_size, uint32_t y_size, uint32_t color_mode) {
uint32_t address = hLtdcHandler.LayerCfg[1].FBStartAdress + (((BSP_LCD_GetXSize()*y_pos) + x_pos)*(4));
void *p_dst = (void *)address;
hDma2dHandler2.Init.Mode = DMA2D_M2M_PFC;
hDma2dHandler2.Init.ColorMode = DMA2D_ARGB8888;
hDma2dHandler2.Init.OutputOffset = BSP_LCD_GetXSize()-x_size;
hDma2dHandler2.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
hDma2dHandler2.LayerCfg[1].InputAlpha = 0xFF;
hDma2dHandler2.LayerCfg[1].InputColorMode = color_mode;
hDma2dHandler2.LayerCfg[1].InputOffset = 0;
hDma2dHandler2.Instance = DMA2D;
if (HAL_DMA2D_Init(&hDma2dHandler2) == HAL_OK) {
if (HAL_DMA2D_ConfigLayer(&hDma2dHandler2, 1) == HAL_OK) {
if (HAL_DMA2D_Start(&hDma2dHandler2, (uint32_t)p_src, (uint32_t)p_dst, x_size, y_size) == HAL_OK) {
HAL_DMA2D_PollForTransfer(&hDma2dHandler2, 10);
}
}
}
}

5
project/Core/Src/main.c
View File

@@ -24,6 +24,8 @@
/* USER CODE BEGIN Includes */
#define LOGGER_LEVEL_ALL
#include "log.h"
#include "lcd_api.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
@@ -109,9 +111,8 @@ int main(void)
MX_LWIP_Init();
MX_QUADSPI_Init();
/* USER CODE BEGIN 2 */
lcd_init(true);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)

2
project/Drivers/BSP/STM32746G-Discovery/stm32746g_discovery_lcd.c
View File

@@ -116,7 +116,7 @@ EndDependencies */
/** @defgroup STM32746G_DISCOVERY_LCD_Private_Variables STM32746G_DISCOVERY_LCD Private Variables
* @{
*/
*/
LTDC_HandleTypeDef hLtdcHandler;
static DMA2D_HandleTypeDef hDma2dHandler;

2
project/Drivers/BSP/STM32746G-Discovery/stm32746g_discovery_lcd.h
View File

@@ -43,7 +43,7 @@
/** @addtogroup STM32746G_DISCOVERY
* @{
*/
/** @addtogroup STM32746G_DISCOVERY_LCD
* @{
*/