Camilo Londoño / GPS

gps ok

Dependents:   Tarea6_Gsm_gps

Fork of GPS by Gustavo Ramirez

GPS.cpp@2:cefda8b10525, 2018-06-05 (annotated)

Committer:
jclondonol
Date:
Tue Jun 05 03:21:48 2018 +0000
Revision:
2:cefda8b10525
Parent:
1:653fe36ca211 
tarea 6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jclondonol 2:cefda8b10525 1 /* mbed EM-406 GPS Module Library
jclondonol 2:cefda8b10525 2 * Copyright (c) 2008-2010, sford
jclondonol 2:cefda8b10525 3 *
jclondonol 2:cefda8b10525 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
jclondonol 2:cefda8b10525 5 * of this software and associated documentation files (the "Software"), to deal
jclondonol 2:cefda8b10525 6 * in the Software without restriction, including without limitation the rights
jclondonol 2:cefda8b10525 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jclondonol 2:cefda8b10525 8 * copies of the Software, and to permit persons to whom the Software is
jclondonol 2:cefda8b10525 9 * furnished to do so, subject to the following conditions:
jclondonol 2:cefda8b10525 10 *
jclondonol 2:cefda8b10525 11 * The above copyright notice and this permission notice shall be included in
jclondonol 2:cefda8b10525 12 * all copies or substantial portions of the Software.
jclondonol 2:cefda8b10525 13 *
jclondonol 2:cefda8b10525 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jclondonol 2:cefda8b10525 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jclondonol 2:cefda8b10525 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jclondonol 2:cefda8b10525 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jclondonol 2:cefda8b10525 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jclondonol 2:cefda8b10525 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jclondonol 2:cefda8b10525 20 * THE SOFTWARE.
jclondonol 2:cefda8b10525 21 */
simon 0:15611c7938a3 22
simon 0:15611c7938a3 23 #include "GPS.h"
simon 0:15611c7938a3 24
simon 0:15611c7938a3 25 GPS::GPS(PinName tx, PinName rx) : _gps(tx, rx) {
tony63 1:653fe36ca211 26 _gps.baud(9600);
simon 0:15611c7938a3 27 longitude = 0.0;
simon 0:15611c7938a3 28 latitude = 0.0;
simon 0:15611c7938a3 29 }
simon 0:15611c7938a3 30
simon 0:15611c7938a3 31 int GPS::sample() {
simon 0:15611c7938a3 32 float time;
simon 0:15611c7938a3 33 char ns, ew;
simon 0:15611c7938a3 34 int lock;
simon 0:15611c7938a3 35
simon 0:15611c7938a3 36 while(1) {
simon 0:15611c7938a3 37 getline();
jclondonol 2:cefda8b10525 38 //$GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
jclondonol 2:cefda8b10525 39 // Check if it is a GPGGA msg (matches both locked and non-locked msg)
simon 0:15611c7938a3 40 if(sscanf(msg, "GPGGA,%f,%f,%c,%f,%c,%d", &time, &latitude, &ns, &longitude, &ew, &lock) >= 1) {
jclondonol 2:cefda8b10525 41 if(!lock) { //si lock es 1 hay lecturas ok
jclondonol 2:cefda8b10525 42 longitude = 0.0;
jclondonol 2:cefda8b10525 43 latitude = 0.0;
jclondonol 2:cefda8b10525 44 return 0;
jclondonol 2:cefda8b10525 45 }
jclondonol 2:cefda8b10525 46 else {
simon 0:15611c7938a3 47 if(ns == 'S') { latitude *= -1.0; }
simon 0:15611c7938a3 48 if(ew == 'W') { longitude *= -1.0; }
jclondonol 2:cefda8b10525 49 latitude = (latitude / 100.0f);
jclondonol 2:cefda8b10525 50 //float minutes = latitude - (degrees * 100.0f);
jclondonol 2:cefda8b10525 51 //latitude = degrees + minutes / 60.0f;
jclondonol 2:cefda8b10525 52 longitude = (longitude / 100.0f);
jclondonol 2:cefda8b10525 53 //minutes = longitude - (degrees * 100.0f);
jclondonol 2:cefda8b10525 54 //longitude = degrees + minutes / 60.0f;
jclondonol 2:cefda8b10525 55
simon 0:15611c7938a3 56 return 1;
jclondonol 2:cefda8b10525 57 }
simon 0:15611c7938a3 58 }
simon 0:15611c7938a3 59 }
simon 0:15611c7938a3 60 }
simon 0:15611c7938a3 61
jclondonol 2:cefda8b10525 62 /*
simon 0:15611c7938a3 63 float GPS::trunc(float v) {
simon 0:15611c7938a3 64 if(v < 0.0) {
simon 0:15611c7938a3 65 v*= -1.0;
jclondonol 2:cefda8b10525 66 v = floor(v);
simon 0:15611c7938a3 67 v*=-1.0;
simon 0:15611c7938a3 68 } else {
simon 0:15611c7938a3 69 v = floor(v);
simon 0:15611c7938a3 70 }
simon 0:15611c7938a3 71 return v;
simon 0:15611c7938a3 72 }
jclondonol 2:cefda8b10525 73 */
simon 0:15611c7938a3 74 void GPS::getline() {
jclondonol 2:cefda8b10525 75 while(_gps.getc() != '$'); // wait for the start of a line
simon 0:15611c7938a3 76 for(int i=0; i<256; i++) {
jclondonol 2:cefda8b10525 77 msg[i] = _gps.getc();
jclondonol 2:cefda8b10525 78 if(msg[i] == '\r') {
simon 0:15611c7938a3 79 msg[i] = 0;
jclondonol 2:cefda8b10525 80 return;
simon 0:15611c7938a3 81 }
simon 0:15611c7938a3 82 }
simon 0:15611c7938a3 83 error("Overflowed message limit");
simon 0:15611c7938a3 84 }