test ver (get more data from GPS)
Dependents: sample_GPS_GYSFDMAXB_edite_by_asha GPSDRV8833CanSat
getGPS.cpp
- Committer:
- CanSat_C
- Date:
- 2018-07-09
- Revision:
- 1:2046f20df896
- Parent:
- 0:030ffb18f36d
File content as of revision 1:2046f20df896:
#include "mbed.h" #include "getGPS.h" GPS::GPS(PinName gpstx,PinName gpsrx): _gps(gpstx,gpsrx) { latitude = 0; longitude = 0; _gps.baud(GPSBAUD); _gps.printf("$PMTK314,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29"); } bool GPS::getgps() { char gps_data[256]; int i; do { while(_gps.getc() != '$'); //$マークまで読み飛ばし i = 0; /* gpa_data初期化 */ for(int j = 0; j < 256; j++) gps_data[j] = '\0'; /* NMEAから一行読み込み */ while((gps_data[i] = _gps.getc()) != '\r') { i++; if(i == 256) { i = 255; break; } } } while(strstr(gps_data, "GPGGA") == NULL); //GGAセンテンスまで一行ずつ読み込み続ける int rlock; char ns,ew; double w_time, raw_longitude, raw_latitude; int satnum; double hdop; if(sscanf(gps_data, "GPGGA, %lf, %lf, %c, %lf, %c, %d, %d, %lf", &w_time, &raw_latitude, &ns, &raw_longitude, &ew, &rlock, &satnum, &hdop) > 1) { /* 座標1(度部分) */ int latitude_dd = (int)(raw_latitude / 100); int longitude_dd = (int)(raw_longitude / 100); /* 座標2(分部分 → 度) */ double latitude_md = (raw_latitude - latitude_dd * 100) / 60; double longitude_md = (raw_longitude - longitude_dd * 100) / 60; /* 座標1 + 2 */ latitude = latitude_dd + latitude_md; longitude = longitude_dd + longitude_md; return true; } else return false; //GGAセンテンスの情報が欠けている時 }