Revision 2:c16325a7d225, committed 2019-07-04

Comitter:

epremeaux

Date:

Thu Jul 04 04:12:41 2019 +0000

Parent:

1:acd907fbcbae

Commit message:

U-Blox-M8N GPS example for Nucleo-F401RE. Decodes additional NMEA sentences

Changed in this revision

--- a/MODSERIAL.lib	Fri Aug 22 12:43:55 2014 +0000
+++ b/MODSERIAL.lib	Thu Jul 04 04:12:41 2019 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/edodm85/code/MODSERIAL/#4213f9a7c3ad
+https://os.mbed.com/users/Sissors/code/MODSERIAL/#d2a5e26fd658

--- a/main.cpp	Fri Aug 22 12:43:55 2014 +0000
+++ b/main.cpp	Thu Jul 04 04:12:41 2019 +0000
@@ -2,16 +2,39 @@
  * Author: Edoardo De Marchi
  * Date: 22-08-14
  * Notes: Firmware for GPS U-Blox NEO-6M
+ *
+ * Modified: Emery Premeaux
+ * Date: July 2019
+ * Written for: Nucleo F401RE & NEO-M8N
+ *
+ * Updated MODSERIAL library now compiles without errors but data seems corrupted.
+ *
+ * NMEA sentences:  https://www.gpsinformation.org/dale/nmea.htm#nmea
+ * 
 */
 
-#include "main.h"
+#include "mbed.h"
+//#include "MODSERIAL.h"
+
+//MODSERIAL pc(USBTX,USBRX);
+//MODSERIAL gps(D8, D2);
+
+Serial pc(USBTX,USBRX);
+Serial gps(D8, D2);
+
+char cDataBuffer[500];
+int i = 0;
+int h_time,m_time,s_time;
+
+void Init();
+void parse(char *cmd, int n);
+void parseTime (float timeval);
 
 
 void Init()
 {
-    gps.baud(9600);
-    pc.baud(115200);
-
+    gps.baud(115200);
+     pc.baud(115200);
     pc.printf("Init OK\n");
 }
 
@@ -47,15 +70,16 @@
     }
 }
 
-
+/* 
+ * NMEA sentences:  https://www.gpsinformation.org/dale/nmea.htm#nmea
+ *                  http://navspark.mybigcommerce.com/content/NMEA_Format_v0.1.pdf
+ */
 void parse(char *cmd, int n)
-{
-    
+{   
     char ns, ew, tf, status;
     int fq, nst, fix, date;                                     // fix quality, Number of satellites being tracked, 3D fix
     float latitude, longitude, timefix, speed, altitude;
     
-    
     // Global Positioning System Fix Data
     if(strncmp(cmd,"$GPGGA", 6) == 0) 
     {
@@ -64,27 +88,71 @@
     }
     
     // Satellite status
-    if(strncmp(cmd,"$GPGSA", 6) == 0) 
+     else if(strncmp(cmd,"$GPGSA", 6) == 0) 
     {
         sscanf(cmd, "$GPGSA,%c,%d,%d", &tf, &fix, &nst);
         pc.printf("GPGSA Type fix: %c, 3D fix: %d, number of sat: %d\r\n", tf, fix, nst);
     }
     
     // Geographic position, Latitude and Longitude
-    if(strncmp(cmd,"$GPGLL", 6) == 0) 
+    else if(strncmp(cmd,"$GPGLL", 6) == 0) 
     {
         sscanf(cmd, "$GPGLL,%f,%c,%f,%c,%f", &latitude, &ns, &longitude, &ew, &timefix);
         pc.printf("GPGLL Latitude: %f %c, Longitude: %f %c, Fix taken at: %f\n", latitude, ns, longitude, ew, timefix);
     }
     
     // Geographic position, Latitude and Longitude
-    if(strncmp(cmd,"$GPRMC", 6) == 0) 
+    else if(strncmp(cmd,"$GPRMC", 6) == 0) 
     {
         sscanf(cmd, "$GPRMC,%f,%c,%f,%c,%f,%c,%f,,%d", &timefix, &status, &latitude, &ns, &longitude, &ew, &speed, &date);
         pc.printf("GPRMC Fix taken at: %f, Status: %c, Latitude: %f %c, Longitude: %f %c, Speed: %f, Date: %d\n", timefix, status, latitude, ns, longitude, ew, speed, date);
     }
+    
+    // 
+    else if(strncmp(cmd,"$GNVTG", 6) == 0) 
+    {
+     //   pc.printf("its a Vector Track message.\n");
+    }
+    
+    else if(strncmp(cmd,"$GNGGA", 6) == 0) 
+    {
+        sscanf(cmd, "$GNGGA,%f,%f,%c,%f,%c,%d,%d,%*f,%f", &timefix, &latitude, &ns, &longitude, &ew, &fq, &nst, &altitude);
+        pc.printf("GNGGA Fix taken at: %f, Latitude: %f %c, Longitude: %f %c, Fix quality: %d, Number of sat: %d, Altitude: %f M\n", timefix, latitude, ns, longitude, ew, fq, nst, altitude);
+        parseTime(timefix);
+        pc.printf("Time: %d:%d:%d\n", h_time, m_time, s_time);
+    }
+    
+    else if(strncmp(cmd,"$GNGSA", 6) == 0) 
+    {
+        sscanf(cmd, "$GNGSA,%c,%d,%d", &tf, &fix, &nst);
+        pc.printf("GNGSA Type fix: %c, 3D fix: %d, number of sat: %d\r\n", tf, fix, nst);
+    }
+    
+    else if(strncmp(cmd,"$GPGSV", 6) == 0) 
+    {
+     //   pc.printf("its a Satellite details message.\n");
+    }
+    
+    else if(strncmp(cmd,"$GNGLL", 6) == 0) 
+    {
+        sscanf(cmd, "$GNGLL,%f,%c,%f,%c,%f", &latitude, &ns, &longitude, &ew, &timefix);
+        pc.printf("GNGLL Latitude: %f %c, Longitude: %f %c, Fix taken at: %f\n", latitude, ns, longitude, ew, timefix);
+    }
+    
+    else
+    {
+   //     pc.printf("Unknown message type\n");
+    }
+}
+
+void parseTime (float timeval)
+{
+    //format utc time to beijing time,add 8 time zone
+                float time = timeval + 80000.00f;
+                h_time = int(time) / 10000;
+                m_time = (int(time) % 10000) / 100;
+                s_time = int(time) % 100;
 }
 
 
 
-

--- a/main.h	Fri Aug 22 12:43:55 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,19 +0,0 @@
-#pragma once 
-#include "mbed.h"
-#include "MODSERIAL.h"
-
-MODSERIAL pc(USBTX,USBRX);
-
-#if   defined(TARGET_LPC1768)
-MODSERIAL gps(p13, p14);
-#elif defined(TARGET_LPC4330_M4)
-MODSERIAL gps(UART0_TX, UART0_RX);
-#endif
-
-
-char cDataBuffer[500];
-int i = 0;
-
-
-void Init();
-void parse(char *cmd, int n);

--- a/mbed-src.lib	Fri Aug 22 12:43:55 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/mbed_official/code/mbed-src/#ec1b66a3d094

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Jul 04 04:12:41 2019 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9baf128c2fab
\ No newline at end of file