File content as of revision 0:42a334c405de:

#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){
    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){
    if(gga[8]=='0'){
        time_str[0]=gga[7];
        time_str[1]=gga[8]+0x09;
    }else{
        time_str[0]=gga[7]+0x01;
        time_str[1]=gga[8]-0x01;
    }
    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];
    
    states = rmc[18];
    
    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];
    }
    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;
    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;
    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;
}

char* GPS::get_time(){
    return time_str;
}

float GPS::get_latitude(){
    return latitude;
}

char* GPS::get_str_latitude(){
    return latitude_str;
}

float GPS::get_longitude(){
    return longitude;
}

char* GPS::get_str_longitude(){
    return longitude_str;
}

char GPS::get_states(){
    return states;
}

float GPS::get_speed(){
    return speed;
}