Diff: main.cpp

Revision:

0:23342e031341

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jun 24 09:55:03 2017 +0000
@@ -0,0 +1,59 @@
+#include "mbed.h"
+#include <string>
+
+#define buf_max         256
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+Serial sim808(PA_9, PA_10);
+DigitalOut sim_power(D4);//PB_5  //复位SIM808
+
+int  rec_cnt = 0;                         //receive count
+char result[buf_max];
+
+void sim_callback()
+{
+    char x;
+    x = sim808.getc();
+    result[rec_cnt++]= x;
+    pc.putc(x);
+        if(rec_cnt>=buf_max-1)rec_cnt=0;
+}
+bool sim_wait(int x)
+{
+    char *p; 
+    rec_cnt = 0;
+    memset(result,0,buf_max*sizeof(char));
+    while(x)
+    {
+        wait(1);
+        p=strstr(result,"OK");
+        if(p) 
+        {    
+            return true;
+        } 
+         x--;
+    }
+    return false;
+}
+
+int main()
+{
+    pc.baud(115200);
+    sim808.baud(115200);
+    sim808.attach(&sim_callback,SerialBase::RxIrq);
+    
+    pc.printf("AT+CGNSPWR=1\r\n");                 //打开GPS
+    sim808.printf("AT+CGNSPWR=1\r\n");
+    
+    if(sim_wait(1)){
+        pc.printf("GPS Open Success\r\n");
+    } 
+    else{
+        pc.printf("GPS Open Failed\r\n");
+    }
+    pc.printf("AT+CGNSURC=1\r\n");               //每秒发送一次GPS定位信息
+    sim808.printf("AT+CGNSURC=1\r\n");
+    wait(10);
+    pc.printf("AT+CGNSPWR=0\r\n");               //关闭GPS
+    sim808.printf("AT+CGNSPWR=0\r\n");
+}
\ No newline at end of file