/* *********************************************************************
Hello, with this little tool you can analyze the GPS-Out-string
I use only the GPPGGA string.

You must the code include in "Antonio Scarfone" "gps_master_1_04.nxc"

copy and paste or

#include "strip_gps.nxc"

after
.....
#include "NXCDefs.h"
.......

start the tool with

.......
       //debug output
       //tmpstr=SubStr(out, 5, 13);
       //TextOut(0,LCD_LINE4,tmpstr);
       //NumOut(0,LCD_LINE5,numsent);
       //write the sentences in a file
       
   strip_gps_data(out);   //----------------this is new
       
       // WriteData(FILENAME,out);
       numsent = 0;
...........

possibly you must comment out TextOUT or NumOUT from gps_master_1_04.nxc

Author: Robokalle
Date:   19.11.2007

************************************************************************** */
#include "NXCDefs.h"

struct GPGGA_struct {
       long clock_high;
       long clock_low;
       unsigned int latitude_high;
       int latitude_low;
       string N_direction;
       unsigned int longitude_high;
       int longitude_low;
       string E_direction;
       byte quality;
       byte Sat_number;
       byte accurateness_high;
       byte accurateness_low;
       int altitude_high;
       int altitude_low;
       string altitude_measure;
};
GPGGA_struct GPGGA;

void  GPGGAtoScreen() {
   ClearScreen();

   NumOut(0,LCD_LINE1,GPGGA.clock_high);
   TextOut(36,LCD_LINE1,".");
   NumOut(42,LCD_LINE1,GPGGA.clock_low);

   NumOut(0,LCD_LINE2,GPGGA.latitude_high);
   TextOut(36,LCD_LINE2,".");
   NumOut(42,LCD_LINE2,GPGGA.latitude_low);

   NumOut(0,LCD_LINE3,GPGGA.longitude_high);
   TextOut(36,LCD_LINE3,".");
   NumOut(42,LCD_LINE3,GPGGA.longitude_low);

   NumOut(0,LCD_LINE4,GPGGA.altitude_high);
   TextOut(36,LCD_LINE4,".");
   NumOut(42,LCD_LINE4,GPGGA.altitude_low);
   TextOut(48,LCD_LINE4,GPGGA.altitude_measure);

   NumOut(0,LCD_LINE5,GPGGA.accurateness_high);
   TextOut(36,LCD_LINE5,".");
   NumOut(42,LCD_LINE5,GPGGA.accurateness_low);

   NumOut(0,LCD_LINE6,GPGGA.quality);
   NumOut(0,LCD_LINE7,GPGGA.Sat_number);

} // GPGGA

void copytostruct(int item,string sdumy){
int len,j;
string dumy, dumy1;
len= StrLen(sdumy);

switch(item){
            case 1:
                 for (j=0; j < len ;j++){
                      if (StrIndex(sdumy,j)== 46){ // nach "." suchen
                          dumy1= SubStr( sdumy,0,j ) ;
                          GPGGA.clock_high = StrToNum(dumy1);
                          dumy1=SubStr( sdumy,j+1, len - j);
                          GPGGA.clock_low =StrToNum(dumy1);
                      }// if str
                   } // for j
            break;
            case 2:
                 for (j=0; j < len ;j++){
                      if (StrIndex(sdumy,j)== 46){ // nach "." suchen
                          dumy1= SubStr( sdumy,0,j ) ;
                          GPGGA.latitude_high = StrToNum(dumy1);
                          dumy1=SubStr( sdumy,j+1, len - j);
                          GPGGA.latitude_low =StrToNum(dumy1);
                      }// if str
                   } // for j
            break;

            case 3:
                 GPGGA.N_direction=sdumy;
            break;
            case 4:
                 for (j=0; j < len ;j++){
                      if (StrIndex(sdumy,j)== 46){ // nach "." suchen
                          dumy1= SubStr( sdumy,0,j ) ;
                          GPGGA.longitude_high = StrToNum(dumy1);
                          dumy1=SubStr( sdumy,j+1, len - j);
                          GPGGA.longitude_low =StrToNum(dumy1);
                      }// if str
                   } // for j
            break;
            case 5:
                 GPGGA.E_direction=sdumy;
            break;
            case 6:
                 GPGGA.quality=StrToNum(sdumy);
            break;
            case 7:
                 GPGGA.Sat_number=StrToNum(sdumy);
            break;
            case 8:
                 for (j=0; j < len ;j++){
                      if (StrIndex(sdumy,j)== 46){ // nach "." suchen
                          dumy1= SubStr( sdumy,0,j ) ;
                          GPGGA.accurateness_high = StrToNum(dumy1);
                          dumy1=SubStr( sdumy,j+1, len - j);
                          GPGGA.accurateness_low =StrToNum(dumy1);
                      }// if str
                   } // for j
            break;
            case 9:
                 for (j=0; j < len ;j++){
                      if (StrIndex(sdumy,j)== 46){ // nach "." suchen
                          dumy1= SubStr( sdumy,0,j ) ;
                          GPGGA.altitude_high = StrToNum(dumy1);
                          dumy1=SubStr( sdumy,j+1, len - j);
                          GPGGA.altitude_low =StrToNum(dumy1);
                      }// if str
                   } // for j
            break;
            case 10:
                 GPGGA.altitude_measure=sdumy;
            break;

               
}// switch


} // ----------------------------------copytostr

void strip_gps_data(string GPS_data){
int lendata, i, begin, last, item ;
string sdumy;
bool GGA;
GGA = false;
i=0;
lendata= StrLen(GPS_data);
begin = -1;
item=0;

while (StrIndex(GPS_data,i) ==36 && i < lendata){// suchen "$"
      i++;
      begin =i;
      } // while
if (begin >-1){
    for (i=begin; i < lendata ;i++) {
        if (StrIndex(GPS_data,i)== 44){
           last=i;
           sdumy=SubStr(GPS_data,begin,last-begin);
           if (sdumy == "GPGGA"){
              GGA = true;
           }

           if (GGA){
           NumOut(0,LCD_LINE6,GGA);
              copytostruct(item,sdumy);
              begin=i+1;
             // NumOut(0,LCD_LINE8,item);
              item++;
              if (item > 10){
                 i=lendata;
               //  Wait(500);
                GPGGAtoScreen();
              }
           }
           
           else
           {
           i=lendata;
           }
        }// if strindex
    }// for begin
} // if
} // ---------------------------------copy


/*
task main (){   // Testing main
string GPS_data = "$GPGGA,123522.798,5016.9430,N,01776.7081,E,1,05,5.0,564.2,M,,,,0000*0F";

 strip_gps_data(GPS_data);


 Wait(1000);
}  //----------------------------------------main
 */