Cumulocity Official / Mbed 2 deprecated MbedSmartRestMain Featured

Official reference client implementation for Cumulocity SmartREST on u-blox C027.

Dependencies:   C027_Support C12832 LM75B MMA7660 MbedSmartRest mbed-rtos mbed

Fork of MbedSmartRestMain by Vincent Wochnik

io/GPSTracker.cpp@131:ca312ec4bd0f, 2015-08-07 (annotated)

Committer:
xinlei
Date:
Fri Aug 07 12:38:28 2015 +0000
Revision:
131:ca312ec4bd0f
Parent:
107:fc5f25f0e0d5
Child:
135:c4009ecaf5c0
GPSTracker: fix for new data format

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Cumulocity 47:89ae46d5c466 1 #include <stdlib.h>
Cumulocity 47:89ae46d5c466 2 #include <string.h>
xinlei 76:b07effe83fb8 3 #include "GPSTracker.h"
xinlei 76:b07effe83fb8 4 #include "logging.h"
Cumulocity 47:89ae46d5c466 5
xinlei 99:e369fc75c000 6 GPSTracker::GPSTracker() :
xinlei 99:e369fc75c000 7 _gps(),
Cumulocity 47:89ae46d5c466 8 _thread(GPSTracker::thread_func, this),
Cumulocity 47:89ae46d5c466 9 _positionSet(false)
Cumulocity 47:89ae46d5c466 10 {
xinlei 99:e369fc75c000 11 _gps.init();
Cumulocity 47:89ae46d5c466 12 }
Cumulocity 47:89ae46d5c466 13
Cumulocity 47:89ae46d5c466 14 bool GPSTracker::position(GPSTracker::Position *position)
Cumulocity 47:89ae46d5c466 15 {
xinlei 131:ca312ec4bd0f 16 bool result = false;
Cumulocity 47:89ae46d5c466 17
Cumulocity 47:89ae46d5c466 18 _mutex.lock();
Cumulocity 47:89ae46d5c466 19 if (_positionSet) {
Cumulocity 47:89ae46d5c466 20 memcpy(position, &_position, sizeof(GPSTracker::Position));
Cumulocity 47:89ae46d5c466 21 _positionSet = false;
Cumulocity 47:89ae46d5c466 22 result = true;
Cumulocity 47:89ae46d5c466 23 }
Cumulocity 47:89ae46d5c466 24 _mutex.unlock();
Cumulocity 47:89ae46d5c466 25
Cumulocity 47:89ae46d5c466 26 return result;
Cumulocity 47:89ae46d5c466 27 }
vwochnik 60:3c822f97fc73 28
Cumulocity 47:89ae46d5c466 29 void GPSTracker::thread()
Cumulocity 47:89ae46d5c466 30 {
Cumulocity 47:89ae46d5c466 31 char buf[256], chr; // needs to be that big otherwise mdm isn't working
Cumulocity 47:89ae46d5c466 32 int ret, len, n;
Cumulocity 47:89ae46d5c466 33 double altitude, latitude, longitude;
Cumulocity 47:89ae46d5c466 34 while (true) {
Cumulocity 47:89ae46d5c466 35 ret = _gps.getMessage(buf, sizeof(buf));
Cumulocity 47:89ae46d5c466 36 if (ret <= 0) {
Cumulocity 47:89ae46d5c466 37 Thread::wait(100);
Cumulocity 47:89ae46d5c466 38 continue;
xinlei 131:ca312ec4bd0f 39 }
Cumulocity 47:89ae46d5c466 40 len = LENGTH(ret);
xinlei 76:b07effe83fb8 41 if ((PROTOCOL(ret) != GPSParser::NMEA) || (len <= 6)) {
xinlei 76:b07effe83fb8 42 aWarning("GPS data is not in NMEA protocol!\r\n");
Cumulocity 47:89ae46d5c466 43 continue;
xinlei 76:b07effe83fb8 44 }
Cumulocity 47:89ae46d5c466 45
xinlei 76:b07effe83fb8 46 // we're only interested in fixed GPS positions, data type: GPGGA
xinlei 131:ca312ec4bd0f 47 if (strncmp("$GPGGA", buf, 6) != 0 && strncmp("$GNGGA", buf, 6) != 0)
Cumulocity 47:89ae46d5c466 48 continue;
xinlei 131:ca312ec4bd0f 49 if (!_gps.getNmeaItem(6, buf, len, n, 10) || n == 0)
xinlei 76:b07effe83fb8 50 continue;
Cumulocity 47:89ae46d5c466 51
Cumulocity 47:89ae46d5c466 52 // get altitude, latitude and longitude
Cumulocity 47:89ae46d5c466 53 if ((!_gps.getNmeaAngle(2, buf, len, latitude)) ||
Cumulocity 47:89ae46d5c466 54 (!_gps.getNmeaAngle(4, buf, len, longitude)) ||
Cumulocity 47:89ae46d5c466 55 (!_gps.getNmeaItem(9, buf, len, altitude)) ||
Cumulocity 47:89ae46d5c466 56 (!_gps.getNmeaItem(10, buf, len, chr)) ||
xinlei 76:b07effe83fb8 57 (chr != 'M')) {
Cumulocity 47:89ae46d5c466 58 continue;
xinlei 76:b07effe83fb8 59 }
Cumulocity 47:89ae46d5c466 60
Cumulocity 47:89ae46d5c466 61 _mutex.lock();
Cumulocity 47:89ae46d5c466 62 _position.altitude = altitude;
Cumulocity 47:89ae46d5c466 63 _position.latitude = latitude;
Cumulocity 47:89ae46d5c466 64 _position.longitude = longitude;
Cumulocity 47:89ae46d5c466 65 _positionSet = true;
Cumulocity 47:89ae46d5c466 66 _mutex.unlock();
Cumulocity 47:89ae46d5c466 67 }
Cumulocity 47:89ae46d5c466 68 }
Cumulocity 47:89ae46d5c466 69
Cumulocity 47:89ae46d5c466 70 void GPSTracker::thread_func(void const *arg)
Cumulocity 47:89ae46d5c466 71 {
Cumulocity 47:89ae46d5c466 72 GPSTracker *that;
Cumulocity 47:89ae46d5c466 73 that = (GPSTracker*)arg;
Cumulocity 47:89ae46d5c466 74 that->thread();
Cumulocity 47:89ae46d5c466 75 }