优化

EC800M.c

@@ -1,9 +1,15 @@
 #include "EC800M.h"
 
-
 char GPSDATA[GPSDATA_LENGTH];
 int GPSDATA_LEN;
 
+// 重置数据缓冲区
+void reset_data()
+{
+    memset(GPSDATA, 0, GPSDATA_LENGTH);
+    GPSDATA_LEN = 0;
+}
+
 void uart_send_string(const char *str)
 {
     size_t len = strlen(str);
@@ -26,8 +32,10 @@ void uart_read_string()
 
 void uart_read_string_until_response(const char *expected_response)
 {
+    reset_data();
+
     int response_len = strlen(expected_response);
-    char response_buffer[1024]; // 假设响应不会超过 100 个字符
+    char response_buffer[270];  // 假设响应不会超过 270 个字符
 
     int i = 0;
     while (1) {
@@ -35,6 +43,7 @@ void uart_read_string_until_response(const char *expected_response)
             char c = uart_getc(GPS_UART);
             GPSDATA[i++] = c;
             GPSDATA[i] = '\0';  // 添加字符串结束符
+
             if (strstr(GPSDATA, expected_response) != NULL) {
                 return;         // 找到了预期的响应，退出循环
             }
@@ -43,22 +52,80 @@ void uart_read_string_until_response(const char *expected_response)
     }
 }
 
-// 重置数据缓冲区
+// GPS 经纬度转10进制
-void reset_data()
+long double convertToDecimal(long double coordinate)
 {
-    memset(GPSDATA, 0, GPSDATA_LENGTH);
+    int degree = (int)(coordinate / 100);
-    GPSDATA_LEN = 0;
+    long double minutes = coordinate - degree * 100;
+    return degree + minutes / 60;
+}
+
+// 解释GPS数据
+void EC800M_GPS_DATA_PARSING(char *GPS_DATA, GPS_ * gps_)
+{
+    int i = 1;
+    char *p = strchr(GPS_DATA, ':');
+    char *p1 = strstr(p + 2, "\r\n");
+    char GPS_DATA_[p1 - p];
+    memset(gps_->time, 0, 10);
+    memset(gps_->N, 0, 20);
+    memset(gps_->E, 0, 20);
+    memset(GPS_DATA_, 0, p1 - p);
+    memcpy(GPS_DATA_, p + 2, p1 - p - 2 + 1);
+    GPS_DATA_[p1 - p - 2 + 1] = '\0';
+    printf("%s\n", GPS_DATA_);
+
+    char *token = strtok(GPS_DATA_, ",");
+    while (token != NULL) {
+        if (i == 1) {
+            strcpy(gps_->time, token);
+        }
+        if (i == 2) {
+            strcpy(gps_->N, token);
+        }
+        if (i == 3) {
+            strcpy(gps_->E, token);
+        }
+
+        token = strtok(NULL, ",");
+        i++;
+    }
+
+    gps_->N[strlen(gps_->N) - 1] = '\0';
+    gps_->E[strlen(gps_->E) - 1] = '\0';
+
+    long double N, E;
+    N = atof(gps_->N);
+    E = atof(gps_->E);
+    //printf("GPS : %.9lf, %.9lf\n", N, E);
+    //printf("GPS : %.6lf, %.6lf\n", convertToDecimal(N), convertToDecimal(E));
+
+    // 095921.00
+    char hours[3] = { 0 };
+    char minutes[3] = { 0 };
+    char seconds[9] = { 0 };
+    char *p2 = gps_->time;
+    memcpy(hours, p2, 2);
+    memcpy(minutes, p2 + 2, 2);
+    memcpy(seconds, p2 + 4, 2);
+    //printf("GPS 修正时间: %d:%s:%s\n", atoi(hours) + 8, minutes, seconds);
+
+    sprintf(gps_->time, "%d:%s:%s", atoi(hours) + 8, minutes, seconds);
+    sprintf(gps_->N, "%.6lf", convertToDecimal(atof(gps_->N)));
+    sprintf(gps_->E, "%.6lf", convertToDecimal(atof(gps_->E)));
+
+    return;
 }
 
 // 初始化EC800M串口
 int EC800M_INIT()
 {
     uart_init(GPS_UART, 2400);
-    gpio_set_function(9, GPIO_FUNC_UART); // UART1_TX
+    gpio_set_function(GPS_UART_TX, GPIO_FUNC_UART); // UART1_TX
-    gpio_set_function(8, GPIO_FUNC_UART); // UART1_RX
+    gpio_set_function(GPS_UART_RX, GPIO_FUNC_UART); // UART1_RX
     int __unused actual = uart_set_baudrate(GPS_UART, GPS_UART_BAUD_RATE);
     uart_set_hw_flow(GPS_UART, false, false);
-    uart_set_format(GPS_UART, 8, 1, UART_PARITY_NONE);
+    uart_set_format(GPS_UART, GPS_DATA_BITS, GPS_STOP_BITS, UART_PARITY_NONE);
     //uart_set_fifo_enabled(GPS_UART, false);
 
     uart_send_string("AT+QGPSCFG=\"outport\",\"uartdebug\"\r\n");
@@ -95,81 +162,32 @@ int EC800M_INIT()
     return 0;
 }
 
-// 读取GPS信息
+void EC800M(void *p)
-char *EC800M()
 {
-    uart_send_string("AT+QGPSLOC=0\r\n");
+    printf("EC800M\n");
-    uart_read_string_until_response("OK");
-    sleep_ms(100);
-    //printf("%s %d\n", GPSDATA, strlen(GPSDATA));
 
-    //printf("\r\n");
+    EC800M_INIT();
+    GPS_ gps_;
+    memset(gps_.time, 0, 10);
+    memset(gps_.N, 0, 20);
+    memset(gps_.E, 0, 20);
 
-    return GPSDATA;
+    while (1) {
-}
 
-// GPS 经纬度转10进制
+        uart_send_string("AT+QGPSLOC=0\r\n");
-long double convertToDecimal(long double coordinate)
+        uart_read_string_until_response("OK");
-{
+        sleep_ms(300);
-    int degree = (int)(coordinate / 100);
+        printf("%s %d\n", GPSDATA, strlen(GPSDATA));
-    long double minutes = coordinate - degree * 100;
-    return degree + minutes / 60;
-}
 
-// 解释GPS数据
+        EC800M_GPS_DATA_PARSING(GPSDATA, &gps_);
-void EC800M_GPS_DATA_PARSING(char *GPS_DATA, GPS_ * gps_)
+        printf(" T: %s\n N: %s\n E: %s\n", gps_.time, gps_.N, gps_.E);
-{
+        printf(" NE: %s, %s\n", gps_.N, gps_.E);
-    int i = 1;
-    char *p = strchr(GPS_DATA, ':');
-    char *p1 = strstr(p + 2, "\r\n");
-    char GPS_DATA_[p1 - p];
-    memset(gps_->time, 0, 10);
-    memset(gps_->N, 0, 20);
-    memset(gps_->E, 0, 20);
-    memset(GPS_DATA_, 0, p1 - p);
-    memcpy(GPS_DATA_, p + 2, p1 - p - 2 + 1);
-    printf("%s\n", GPS_DATA_);
 
-    char *token = strtok(GPS_DATA_, ",");
+        printf("\r\n");
-    while (token != NULL) {
-        if (i == 1) {
-            strcpy(gps_->time, token);
-        }
-        if (i == 2) {
-            strcpy(gps_->N, token);
-        }
-        if (i == 3) {
-            strcpy(gps_->E, token);
-        }
 
-        token = strtok(NULL, ",");
+        watchdog_update();      // 喂狗
-        i++;
+        sleep_ms(3000);
     }
 
-    gps_->N[strlen(gps_->N) - 1] = '\0';
+    return;
-    gps_->E[strlen(gps_->E) - 1] = '\0';
-    
-    long double N,E;
-    N=atof(gps_->N);
-    E=atof(gps_->E);
-    //printf("GPS : %.9lf, %.9lf\n", N, E);
-    //printf("GPS : %.6lf, %.6lf\n", convertToDecimal(N), convertToDecimal(E));
-
-    // 095921.00
-    char hours[3] = { 0 };
-    char minutes[3] = { 0 };
-    char seconds[9] = { 0 };
-    char *p2 = gps_->time;
-    memcpy(hours, p2, 2);
-    memcpy(minutes, p2 + 2, 2);
-    memcpy(seconds, p2 + 4, 2);
-    //printf("GPS 修正时间: %d:%s:%s\n", atoi(hours) + 8, minutes, seconds);
-
-    sprintf(gps_->time, "%d:%s:%s", atoi(hours) + 8, minutes, seconds);
-    sprintf(gps_->N, "%.6lf", convertToDecimal(atof(gps_->N)));
-    sprintf(gps_->E, "%.6lf", convertToDecimal(atof(gps_->E)));
-
-    return ;
 }
-
-

EC800M.h

@@ -7,7 +7,14 @@
 #include "pico/stdlib.h"
 #include "hardware/uart.h"
 
+#include "hardware/clocks.h"
+#include "hardware/watchdog.h"
+
 #define GPS_UART uart1
+#define GPS_UART_TX 9           // 接EC800M TX 上
+#define GPS_UART_RX 8           // 接EC800M RX 上
+#define GPS_DATA_BITS 8
+#define GPS_STOP_BITS 1
 #define GPS_UART_BAUD_RATE 115200
 #define GPSDATA_LENGTH 8192
 
@@ -17,11 +24,6 @@ typedef struct GPS_ {
     char E[20];
 } GPS_;
 
-extern char GPSDATA[GPSDATA_LENGTH];
+extern void EC800M(void *p);
-extern int GPSDATA_LEN;
-
-extern int EC800M_INIT();
-extern char *EC800M();
-extern void EC800M_GPS_DATA_PARSING(char *GPS_DATA, GPS_ * gps_);
 
 #endif

main.c

@@ -6,7 +6,7 @@ int main(void)
     stdio_init_all();
     sleep_ms(1000);
     set_sys_clock_khz(250000, true);
-    
+
     if (watchdog_caused_reboot()) { // 判断是否从看门狗启动或者正常启动
         printf("Rebooted by Watchdog!\n");
     } else {
@@ -15,28 +15,7 @@ int main(void)
     watchdog_enable(8300, 1);   // 8秒检测是否重新加载看门狗计数器. (不更新计数器则重启硬件, 最高8秒)
     watchdog_start_tick(12);
 
-
+    EC800M(NULL);
-    printf("EC800M\n");
-    static char GPS_DATA[1024] = { 0 };
-    EC800M_INIT();
-    
-    GPS_ gps_;
-    memset(gps_.time, 0, 10);
-    memset(gps_.N, 0, 20);
-    memset(gps_.E, 0, 20);
-    
-
-    while (1) {
-        watchdog_update();      // 喂狗
-        strcpy(GPS_DATA, EC800M());
-        EC800M_GPS_DATA_PARSING(GPS_DATA, &gps_);
-        printf(" T: %s\n N: %s\n E: %s\n", gps_.time, gps_.N, gps_.E);
-        printf(" NE: %s, %s\n", gps_.N, gps_.E);
-        
-
-        printf("\r\n");
-        sleep_ms(3000);
-    }
 
     return 0;
 }