Before git init

NTP/Core/Inc/NTP.h

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <stdint.h>
+#include <string.h>
+
+#include "lwip.h"
+#include "udp.h"
+#include "dns.h"
+#include "pbuf.h"
+#include "ip_addr.h"
+
+#include "debug.h"
+
+#define NTP_OFFSET_TIMESTAMPS 40
+#define NTP_OFFSET_ROUNDING 44
+#define SECONDROUNDINGTHRESHOLD 115
+
+// the epoch for NTP starts in year 1900 while the epoch in UNIX starts in 1970
+// Unix time starts on Jan 1 1970. 7O years difference in seconds, that's 2208988800 seconds
+#define SEVENTYYEARS 2208988800UL
+
+//#define NTP_HOST_NAME "time1.google.com"
+#define NTP_HOST_NAME "pool.ntp.org"
+#define NTP_PORT 123
+
+#define NTP_PACKET_SIZE 48           // NTP time stamp is in the first 48 bytes of the message
+#define ntpFirstFourBytes 0xEC0600E3 // NTP request header, first 32 bits
+#define UTC_DELTA ((UTC_DELTA_HOURS * NUMBEROFSECONDSPERHOUR) + (UTC_DELTA_MINUTES * NUMBEROFSECONDSPERMINUTE))
+
+typedef enum
+{
+    NTP_IDLE,
+    NTP_Receiving_DNS,
+    NTP_DNS_GOT_IP,
+    NTP_Receiving_UDP,
+    NTP_GOT_TIME,
+    NTP_ERROR
+} NTPState_t;
+
+typedef struct
+{
+    uint8_t li_vn_mode;
+    uint8_t stratum;
+    uint8_t poll;
+    uint8_t precesion;
+    uint32_t root_delay;
+    uint32_t root_dispersion;
+    uint32_t reference_identifier;
+    uint32_t reference_timestamp[2];
+    uint32_t originate_timestamp[2];
+    uint32_t receive_timestamp[2];
+    uint32_t transmit_timestamp[2];
+} NTP_Packet;
+
+
+uint32_t NTPToEpochUnix(void);
+void NTP_DNS_Callback(const char *name, const ip_addr_t *ipaddr, void *callback_arg);
+void NTP_RECV_CALLBACK(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port);
+