NMEA0813フォーマットのGPSから情報を取り出すプログラムです。
Dependents: GPS_test EM_Logger
nmea0813.cpp
- Committer:
- YSB
- Date:
- 2013-07-05
- Revision:
- 2:7870c69fa58c
- Parent:
- 0:42a334c405de
- Child:
- 3:84d63345eb80
- Child:
- 4:7be9581d0734
File content as of revision 2:7870c69fa58c:
#include "nmea0813.h" GPS::GPS(PinName tx,PinName rx) : Serial(tx,rx){ flg = 0; count = 0; attach(this, &GPS::rxHandler,Serial::RxIrq); T.attach(this,&GPS::update_infomation,1.0); } void GPS::rxHandler(void){ char rxbuf; rxbuf = getc(); GPSdata[count] = rxbuf; if(rxbuf == '$'){ count++; } else if(rxbuf == LF){ count++; flg++; } else{ count++; } if(flg == 7){ flg = 0; count=0; } } void GPS::update_infomation() { //repeatedlly called function get_GGA_RMC(GPSdata); get_infomation(GPGGA,GPRMC); } void GPS::get_GGA_RMC(char* str){ int nullflg=0; char *sp; sp = (char*) strstr(str,"$GPGGA"); for(int i=0;i<80;i++){ if(nullflg ==0){ if(sp[i] != '\n'){ GPGGA[i] = sp[i]; }else{ GPGGA[i] = '\n'; nullflg = 1; } }else{ GPGGA[i] = '\n'; } } nullflg = 0; sp = (char*) strstr(str,"$GPRMC"); for(int i=0;i<80;i++){ if(nullflg ==0){ if(sp[i] != '\n'){ GPRMC[i] = sp[i]; }else{ GPRMC[i] = '\n'; nullflg = 1; } }else{ GPRMC[i] = '\n'; } } nullflg = 0; } void GPS::get_infomation(char* gga,char* rmc){ time_str[0]=gga[7]; time_str[1]=gga[8]; time_str[2]=':'; time_str[3]=gga[9]; time_str[4]=gga[10]; time_str[5]=':'; time_str[6]=gga[11]; time_str[7]=gga[12]; //time_str[8]='\n'; status = rmc[18]; number_of_satelite = gga[46]; for(int i=0;i<9;i++){ latitude_str[i]=gga[18+i]; } for(int i=0;i<10;i++){ longitude_str[i]=gga[30+i]; } for(int i=0;i<5;i++){ speed_str[i]=rmc[51+i]; } } char* GPS::get_time(){ return time_str; } float GPS::get_latitude(){ latitude = (float)(latitude_str[0]-0x30)*10.0+ \ (float)(latitude_str[1]-0x30)+ \ ((float)(latitude_str[2]-0x30)*10.0+ \ (float)(latitude_str[3]-0x30)+ \ (float)(latitude_str[5]-0x30)*0.1+ \ (float)(latitude_str[6]-0x30)*0.01+ \ (float)(latitude_str[7]-0x30)*0.001+ \ (float)(latitude_str[8]-0x30)*0.0001)/60.0; return latitude; } char* GPS::get_str_latitude(){ return latitude_str; } float GPS::get_longitude(){ longitude = (float)(longitude_str[0]-0x30)*100.0+ \ (float)(longitude_str[1]-0x30)*10.0+ \ (float)(longitude_str[2]-0x30)+ \ ((float)(longitude_str[3]-0x30)*10.0+ \ (float)(longitude_str[4]-0x30)+ \ (float)(longitude_str[6]-0x30)*0.1+ \ (float)(longitude_str[7]-0x30)*0.01+ \ (float)(longitude_str[8]-0x30)*0.001+ \ (float)(longitude_str[9]-0x30)*0.0001)/60.0; return longitude; } char* GPS::get_str_longitude(){ return longitude_str; } char GPS::get_status(){ return status; } float GPS::get_speed(){ speed = (float)(speed_str[0]-0x30)*100.0+\ (float)(speed_str[1]-0x30)*10.0+\ (float)(speed_str[2]-0x30)*1.0+\ (float)(speed_str[4]-0x30)*0.1; return speed; } char GPS::get_satelite_number(){ return number_of_satelite; }