Library for the EM-406 GPS module
Fork of GPS by
Diff: GPS.cpp
- Revision:
- 1:455c3e604c92
- Parent:
- 0:15611c7938a3
- Child:
- 2:4ebd0e486b5a
diff -r 15611c7938a3 -r 455c3e604c92 GPS.cpp --- a/GPS.cpp Tue Jun 08 14:10:27 2010 +0000 +++ b/GPS.cpp Sat Mar 30 08:11:26 2013 +0000 @@ -1,81 +1,111 @@ -/* 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); - longitude = 0.0; - latitude = 0.0; +GPS::GPS(PinName tx,PinName rx):_gps(tx,rx) +{ + _gps.baud(4800); + longitude=0.0; + latitude=0.0; +} + +int GPS::sample() +{ + float dummy,d1,d2; + int lock; + while(1) + { + getline(); + fok_jel='°'; + if(sscanf(msg,"GPGGA,%f,%f,%c,%f,%c,%d,%f,%f,%f",&time,&latitude,&ns,&longitude,&ew,&lock,&d1,&d2,&altitude)>=1) + { + ora=elso2(time)+1; + perc=kozepso2(time); + masodperc=utolso2(time); + if(lock==0) + { + nincs_adat(); + altitude=0.0; + } + fokpercmasodperc(); + return 1; + } + if(sscanf(msg,"GPRMC,%f,%c,%f,%c,%f,%c,%f,%f,%f",&time,&status,&latitude,&ns,&longitude,&ew,&speed,&dummy,&date)>=1) + { + nap=elso2(date); + ho=kozepso2(date); + ev=utolso2(date); + ora=elso2(time)+1; + perc=kozepso2(time); + masodperc=utolso2(time); + if(status=='V') + { + nincs_adat(); + speed=0.0; + } + fokpercmasodperc(); + return 1; + } + } } -int GPS::sample() { - float time; - char ns, ew; - int lock; - - while(1) { - getline(); +void GPS::fokpercmasodperc() +{ + long_fok=fok_szamol(longitude); + long_perc=perc_szamol(longitude); + long_masodperc=masodperc_szamol(longitude); + lati_fok=fok_szamol(latitude); + lati_perc=perc_szamol(latitude); + lati_masodperc=masodperc_szamol(latitude); +} - // Check if it is a GPGGA msg (matches both locked and non-locked 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); - float minutes = latitude - (degrees * 100.0f); - latitude = degrees + minutes / 60.0f; - degrees = trunc(longitude / 100.0f * 0.01f); - minutes = longitude - (degrees * 100.0f); - longitude = degrees + minutes / 60.0f; - return 1; - } - } - } +void GPS::nincs_adat() +{ + longitude=0.0; + ew='?'; + latitude=0.0; + ns='?'; +} + +int GPS::fok_szamol(float f) +{ + return (int)(f/100); +} + +int GPS::perc_szamol(float f) +{ + return (int)(f-fok_szamol(f)*100); } -float GPS::trunc(float v) { - if(v < 0.0) { - v*= -1.0; - v = floor(v); - v*=-1.0; - } else { - v = floor(v); - } - return v; +float GPS::masodperc_szamol(float f) +{ + return (f-fok_szamol(f)*100-perc_szamol(f))*60; +} + +int GPS::elso2(float d) +{ + return (int)floor(d/10000); +} + +int GPS::kozepso2(float d) +{ + return (int)floor((d-elso2(d)*10000)/100); } -void GPS::getline() { - while(_gps.getc() != '$'); // wait for the start of a line - for(int i=0; i<256; i++) { - msg[i] = _gps.getc(); - if(msg[i] == '\r') { - msg[i] = 0; - return; - } - } - error("Overflowed message limit"); +int GPS::utolso2(float d) +{ + return (int)floor(d-elso2(d)*10000-kozepso2(d)*100); } + +void GPS::getline() +{ + while(_gps.getc() != '$'); // wait for the start of a line + for(int i=0;i<256;i++) + { + msg[i]=_gps.getc(); + if(msg[i]=='\r') + { + msg[i]=0; + return; + } + } + error("Tul hosszu szoveg !"); +}