diff --git a/EC800M.c b/EC800M.c
index 54b3296..12d8563 100644
--- a/EC800M.c
+++ b/EC800M.c
@@ -1,5 +1,6 @@
 #include "EC800M.h"
 
+
 char GPSDATA[GPSDATA_LENGTH];
 int GPSDATA_LEN;
 
@@ -49,6 +50,7 @@ void reset_data()
     GPSDATA_LEN = 0;
 }
 
+// 初始化EC800M串口
 int EC800M_INIT()
 {
     uart_init(GPS_UART, 2400);
@@ -93,6 +95,7 @@ int EC800M_INIT()
     return 0;
 }
 
+// 读取GPS信息
 char *EC800M()
 {
     uart_send_string("AT+QGPSLOC=0\r\n");
@@ -105,12 +108,68 @@ char *EC800M()
     return GPSDATA;
 }
 
-char *EC800M_GPS_DATA_PARSING(char *GPS_DATA)
+// GPS 经纬度转10进制
+long double convertToDecimal(long double coordinate)
 {
-    char *p = NULL;
-    p = strstr(GPSDATA, "QGPSLOC:");
-
-    printf("%s\n", p);
-
-    return 0;
+    int degree = (int)(coordinate / 100);
+    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);
+    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 ;
+}
+
+
diff --git a/EC800M.h b/EC800M.h
index ec27759..8f365a5 100644
--- a/EC800M.h
+++ b/EC800M.h
@@ -2,6 +2,7 @@
 #define EC800M_H
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "pico/stdlib.h"
 #include "hardware/uart.h"
@@ -10,12 +11,17 @@
 #define GPS_UART_BAUD_RATE 115200
 #define GPSDATA_LENGTH 8192
 
+typedef struct GPS_ {
+    char time[10];
+    char N[20];
+    char E[20];
+} GPS_;
+
 extern char GPSDATA[GPSDATA_LENGTH];
 extern int GPSDATA_LEN;
 
 extern int EC800M_INIT();
 extern char *EC800M();
-extern char *EC800M_GPS_DATA_PARSING(char *GPS_DATA);
-extern void reset_data();
+extern void EC800M_GPS_DATA_PARSING(char *GPS_DATA, GPS_ * gps_);
 
 #endif
diff --git a/main.c b/main.c
index b568c24..20071db 100644
--- a/main.c
+++ b/main.c
@@ -1,66 +1,6 @@
 #include "main.h"
 #include "EC800M.h"
 
-typedef struct GPS_ {
-    char time[10];
-    char N[20];
-    char E[20];
-} GPS_;
-
-float convertToDecimal(float coordinate)
-{
-    int degree = (int)(coordinate / 100);
-    float minutes = coordinate - degree * 100;
-    return degree + minutes / 60;
-}
-
-void Data_parsing(char *gps_data, GPS_ * gps_)
-{
-    char *p = strchr(gps_data, ':');
-    char *p1 = strstr(p + 2, "\r\n");
-    char GPS_DATA_[p1 - p];
-    
-    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_, ",");
-    int i = 1;
-    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';
-    //printf("GPS : %.6f, %.6f\n", convertToDecimal(atof(gps_->N)), convertToDecimal(atof(gps_->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, "%.6f", convertToDecimal(atof(gps_->N)));
-    sprintf(gps_->E, "%.6f", convertToDecimal(atof(gps_->E)));
-
-}
-
 int main(void)
 {
     stdio_init_all();
@@ -75,17 +15,24 @@ 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);
 
-    printf("EC800M\n");
-    EC800M_INIT();
-    char gps_data[1024] = { 0 };
 
+    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());
-        Data_parsing(gps_data, &gps_);
+        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);