programa para leer un GPS desde la FRDMKL25Z

Dependents:   pruebagps rastreador_satelital_2 ELJPGTarea_6

Fork of GPS by Simon Ford

Files at this revision

API Documentation at this revision

Comitter:
tony63
Date:
Fri Jun 06 04:04:46 2014 +0000
Parent:
0:15611c7938a3
Commit message:
programa para leer un GPD desde la FRDMKL25Z

Changed in this revision

GPS.cpp Show annotated file Show diff for this revision Revisions of this file
GPS.h Show annotated file Show diff for this revision Revisions of this file
diff -r 15611c7938a3 -r 653fe36ca211 GPS.cpp
--- a/GPS.cpp	Tue Jun 08 14:10:27 2010 +0000
+++ b/GPS.cpp	Fri Jun 06 04:04:46 2014 +0000
@@ -1,29 +1,9 @@
-/* mbed EM-406 GPS Module Library
- * Copyright (c) 2008-2010, sford
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
+
  
 #include "GPS.h"
 
 GPS::GPS(PinName tx, PinName rx) : _gps(tx, rx) {
-    _gps.baud(4800);    
+    _gps.baud(9600);    
     longitude = 0.0;
     latitude = 0.0;        
 }
@@ -36,13 +16,9 @@
     while(1) {        
         getline();
 
-        // Check if it is a GPGGA msg (matches both locked and non-locked msg)
+        // Chequear si en una trama GPGGA msg 
         if(sscanf(msg, "GPGGA,%f,%f,%c,%f,%c,%d", &time, &latitude, &ns, &longitude, &ew, &lock) >= 1) { 
-            if(!lock) {
-                longitude = 0.0;
-                latitude = 0.0;        
-                return 0;
-            } else {
+           
                 if(ns == 'S') {    latitude  *= -1.0; }
                 if(ew == 'W') {    longitude *= -1.0; }
                 float degrees = trunc(latitude / 100.0f);
@@ -52,7 +28,7 @@
                 minutes = longitude - (degrees * 100.0f);
                 longitude = degrees + minutes / 60.0f;
                 return 1;
-            }
+           
         }
     }
 }
@@ -60,7 +36,7 @@
 float GPS::trunc(float v) {
     if(v < 0.0) {
         v*= -1.0;
-        v = floor(v);
+        v = floor(v);  //floor devuelve el entero mas grande no mayor a v
         v*=-1.0;
     } else {
         v = floor(v);
@@ -69,12 +45,12 @@
 }
 
 void GPS::getline() {
-    while(_gps.getc() != '$');    // wait for the start of a line
+    while(_gps.getc() != '$');    // coje todo menos $
     for(int i=0; i<256; i++) {
-        msg[i] = _gps.getc();
-        if(msg[i] == '\r') {
+        msg[i] = _gps.getc();   //lo va gravando en la cadena msg[ ]
+        if(msg[i] == '\r') {   // si se encuentra retorno de carro le pone el null
             msg[i] = 0;
-            return;
+            return;   
         }
     }
     error("Overflowed message limit");
diff -r 15611c7938a3 -r 653fe36ca211 GPS.h
--- a/GPS.h	Tue Jun 08 14:10:27 2010 +0000
+++ b/GPS.h	Fri Jun 06 04:04:46 2014 +0000
@@ -1,24 +1,4 @@
-/* mbed EM-406 GPS Module Library
- * Copyright (c) 2008-2010, sford
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
+
 
 #include "mbed.h"
 
@@ -41,7 +21,7 @@
     
     /** The longitude (call sample() to set) */
     float longitude;
-
+    
     /** The latitude (call sample() to set) */
     float latitude;
     
@@ -51,7 +31,7 @@
     
     Serial _gps;
     char msg[256];
-
+    
 };
 
 #endif