Diff: main.cpp

Revision:

0:9ca772c9b3e9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Apr 03 08:19:20 2012 +0000
@@ -0,0 +1,107 @@
+// GPS Logger mbed LPC11U24
+
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+SDFileSystem sd(p5, p6, p7, p8, "fs");
+
+Serial gps(p9, p10);
+Serial pc(USBTX, USBRX);
+
+InterruptIn pps(p14);
+
+DigitalOut pps_stat(LED1);
+DigitalOut sd_access(LED2);
+DigitalOut rx_status(LED3);
+DigitalIn enable(p22);
+
+int num = 0;
+int pps_count = 0;
+
+// GPS 1pps interrupt
+void int_pps() {
+    pps_stat =! pps_stat;
+    pps_count += 1;
+}
+
+
+int main() {
+    
+    char tmp;
+    char data[80];
+    int log_count = 0;
+    bool rec_flag = false;
+    int before_sw = 1;
+    FILE *fp = NULL;
+    
+    enable.mode(PullUp);
+
+    pps_stat = 0;
+    sd_access = 0;
+    rx_status = 0;
+
+    pps.rise(&int_pps); 
+    gps.baud(115200);
+    
+    
+    sd_access = 1;
+
+    while (1) {
+        int sw = enable;
+        
+        if( (sw == 0) && (before_sw == 1) )
+        {
+            if( rec_flag )
+            {
+                rec_flag = false;
+                fclose(fp);
+                fp = NULL;
+            }
+            else
+            {
+                rec_flag = true;
+                fp = fopen("/fs/gps.log", "w");
+            }
+            wait(0.2);
+        }
+        before_sw = sw;
+
+        if(gps.readable()) {
+            tmp = gps.getc();
+            data[num] = tmp;
+            if( data[num] == '$' ) {
+                data[0] = '$';
+                num = 1;
+            }
+            else if( data[num-1] == '\r' && data[num] == '\n' ) {
+            
+                if(rec_flag)    rx_status = !rx_status;
+
+                data[num+1] = '\0';
+
+                if(memcmp(data, "$GPRMC",6) == 0) {
+                                
+                    if(pps_count >= 5) {
+                        pps_count = 0;
+                    
+                        if( fp != NULL ) {
+                            sd_access =! sd_access;
+                            fprintf(fp,"%s",data);
+                        }
+
+                    }
+                    if(rec_flag)    deepsleep();
+                }
+                data[0] = '\0';
+                num = 0;
+            }
+            else {
+                num++;
+                if(num > 80)
+                {
+                    num = 0;
+                }
+            }
+        }
+    }
+}