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:
- 2013-06-02
- Revision:
- 1:f4d3c59a4917
- Parent:
- 0:42a334c405de
File content as of revision 1:f4d3c59a4917:
#include "nmea0813.h" GPS::GPS(PinName tx,PinName rx) : Serial(tx,rx){ //time_str[8] = {'0','0',':','0','0',':','0','0'}; //latitude_str[9] = {'0','0','0','0','.','0','0','0','0'}; //longitude_str[10]= {'0','0','0','0','0','.','0','0','0','0'}; flg = 0; count = 0; attach(this, &GPS::rxHandler,Serial::RxIrq); T.attach(this,&GPS::update_infomation,1.0); } void GPS::rxHandler(void){ rxbuf = getc(); GPSdata[count] = rxbuf; if(rxbuf == '$'){ count++; } else if(rxbuf == LF){ count++; flg++; } else{ count++; } if(flg == 7){ flg = 0; count=0; } } void GPS::update_infomation() { //repeatedlly called function set_GGA_RMC(GPSdata); } void GPS::set_GGA_RMC(char* str){ int nullflg=0; char *sp; sp = (char*) strstr(str,"$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{ //break; 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{ //break; GPRMC[i] = '\n'; } } nullflg = 0; } char* GPS::get_time(){ time_str[0]=GPGGA[7]; time_str[1]=GPGGA[8]; time_str[2]=':'; time_str[3]=GPGGA[9]; time_str[4]=GPGGA[10]; time_str[5]=':'; time_str[6]=GPGGA[11]; time_str[7]=GPGGA[12]; return time_str; } float GPS::get_latitude(){ for(int i=0;i<9;i++){ latitude_str[i]=GPGGA[18+i]; } 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(){ for(int i=0;i<9;i++){ latitude_str[i]=GPGGA[18+i]; } return latitude_str; } float GPS::get_longitude(){ for(int i=0;i<10;i++){ longitude_str[i]=GPGGA[30+i]; } 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(){ for(int i=0;i<10;i++){ longitude_str[i]=GPGGA[30+i]; } return longitude_str; } char GPS::get_status(){ status = GPRMC[18]; return status; } float GPS::get_speed(){ for(int i=0;i<5;i++){ speed_str[i]=GPRMC[51+i]; } 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(){ number_of_satelite = GPGGA[46]; return number_of_satelite; }