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parseGSV.c
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parseGSV.c
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#include <stdlib.h>
#include <stdio.h>
#include "parse.h"
// Carole Fountain //
/////////////
// //
// TO DO //
// //
/////////////
int parseGSV(struct NMEAData *dataStore, char* sentence) {
char token[32], *cursor = 0;
short prn = 0;
short snr = 0;
short azimuth = 0;
short elevation = 0;
dataStore->allDataSet &= ~CONSTELLATIONX; // If we're here, we need to clear CONSTELLATIONX. It'll be fixed when we're done.
//////////////////////////////////////////////////
// //
// Extract Number of sentences for full data //
// //
//////////////////////////////////////////////////
tokenize(token, sentence, ",", &cursor);
// We don't need this value so moving on...
//////////////////////////////////////
// //
// Extract what sentence (1 or 2) //
// //
//////////////////////////////////////
// extract what sentence (1 or 2)
tokenize(token, sentence, ",", &cursor);
unsigned short mult = strtol(token, NULL, 10);
mult = (mult - 1) * 4;
if (mult == 0) // first GSV message
{
dataStore->satellites[0].prn = 0;
dataStore->satellites[0].elevation = 0;
dataStore->satellites[0].azimuth = 0;
dataStore->satellites[0].snr = 0;
dataStore->satellites[1].prn = 0;
dataStore->satellites[1].elevation = 0;
dataStore->satellites[1].azimuth = 0;
dataStore->satellites[1].snr = 0;
dataStore->satellites[2].prn = 0;
dataStore->satellites[2].elevation = 0;
dataStore->satellites[2].azimuth = 0;
dataStore->satellites[2].snr = 0;
dataStore->satellites[3].prn = 0;
dataStore->satellites[3].elevation = 0;
dataStore->satellites[3].azimuth = 0;
dataStore->satellites[3].snr = 0;
dataStore->satellites[4].prn = 0;
dataStore->satellites[4].elevation = 0;
dataStore->satellites[4].azimuth = 0;
dataStore->satellites[4].snr = 0;
dataStore->satellites[5].prn = 0;
dataStore->satellites[5].elevation = 0;
dataStore->satellites[5].azimuth = 0;
dataStore->satellites[5].snr = 0;
dataStore->satellites[6].prn = 0;
dataStore->satellites[6].elevation = 0;
dataStore->satellites[6].azimuth = 0;
dataStore->satellites[6].snr = 0;
dataStore->satellites[7].prn = 0;
dataStore->satellites[7].elevation = 0;
dataStore->satellites[7].azimuth = 0;
dataStore->satellites[7].snr = 0;
dataStore->satellites[8].prn = 0;
dataStore->satellites[8].elevation = 0;
dataStore->satellites[8].azimuth = 0;
dataStore->satellites[8].snr = 0;
dataStore->satellites[9].prn = 0;
dataStore->satellites[9].elevation = 0;
dataStore->satellites[9].azimuth = 0;
dataStore->satellites[9].snr = 0;
dataStore->satellites[10].prn = 0;
dataStore->satellites[10].elevation = 0;
dataStore->satellites[10].azimuth = 0;
dataStore->satellites[10].snr = 0;
dataStore->satellites[11].prn = 0;
dataStore->satellites[11].elevation = 0;
dataStore->satellites[11].azimuth = 0;
dataStore->satellites[11].snr = 0;
}
////////////////////////////////////////////
// //
// Extract number of satellites in view //
// //
////////////////////////////////////////////
// extract # of satellites
tokenize(token, sentence, ",", &cursor);
dataStore->numSatellites = (short)strtol(token, NULL, 10);
if (dataStore->numSatellites == 0)
return 0;
dataStore->allDataSet |= SATSX;
// We already have this info so moving on...
/**** FOR THE FOLLOWING PARAMETERS, INFORMATION CAN BE GIVEN FOR
UP TO 4 SATELLITES PER SENTENCE ***/
//////////////////////////
// //
// Extract PRN number //
// //
//////////////////////////
// turn PRN (for 1st satellite) into a useful value
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
prn = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 0].prn = prn; // store value in prearranged spot
}
/////////////////////////
// //
// Extract Elevation //
// //
/////////////////////////
// extract elevation
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
elevation = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 0].elevation = elevation;
}
////////////////////////
// //
// Extract Azimuth //
// //
////////////////////////
// extract azimuth
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
//convert to int
azimuth = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 0].azimuth = azimuth;
}
////////////////////////
// //
// Extract SNR //
// //
////////////////////////
// extract SNR
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
snr = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 0].snr = snr;
}
//////////////////////////
// //
// Extract PRN number //
// //
//////////////////////////
if (dataStore->numSatellites == (1 + mult))
{
dataStore->allDataSet |= CONSTELLATIONX;
return 0;
}
// turn PRN (for 2nd satellite) into a useful value
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
prn = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 1].prn = prn; // store value in prearranged spot
}
/////////////////////////
// //
// Extract Elevation //
// //
/////////////////////////
// extract elevation
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
elevation = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 1].elevation = elevation;
}
////////////////////////
// //
// Extract Azimuth //
// //
////////////////////////
// extract azimuth
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
//convert to int
azimuth = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 1].azimuth = azimuth;
}
////////////////////////
// //
// Extract SNR //
// //
////////////////////////
// extract SNR
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
snr = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 1].snr = snr;
}
//////////////////////////
// //
// Extract PRN number //
// //
//////////////////////////
if (dataStore->numSatellites == (2 + mult))
{
dataStore->allDataSet |= CONSTELLATIONX;
return 0;
}
// turn PRN (for 3rd satellite) into a useful value
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
prn = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 2].prn = prn; // store value in prearranged spot
}
/////////////////////////
// //
// Extract Elevation //
// //
/////////////////////////
// extract elevation
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
elevation = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 2].elevation = elevation;
}
////////////////////////
// //
// Extract Azimuth //
// //
////////////////////////
// extract azimuth
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
//convert to int
azimuth = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 2].azimuth = azimuth;
}
////////////////////////
// //
// Extract SNR //
// //
////////////////////////
// extract SNR
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
snr = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 2].snr = snr;
}
//////////////////////////
// //
// Extract PRN number //
// //
//////////////////////////
if (dataStore->numSatellites == (3 + mult))
{
dataStore->allDataSet |= CONSTELLATIONX;
return 0;
}
// turn PRN (for 4th satellite) into a useful value
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
prn = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 3].prn = prn; // store value in prearranged spot
}
/////////////////////////
// //
// Extract Elevation //
// //
/////////////////////////
// extract elevation
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
elevation = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 3].elevation = elevation;
}
////////////////////////
// //
// Extract Azimuth //
// //
////////////////////////
// extract azimuth
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
//convert to int
azimuth = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 3].azimuth = azimuth;
}
////////////////////////
// //
// Extract SNR //
// //
////////////////////////
// extract SNR
tokenize(token, sentence, ",", &cursor);
if (strcmp(token, "") != 0)
{
// convert to int
snr = (short)strtol(token, NULL, 10);
dataStore->satellites[mult + 3].snr = snr;
}
if (dataStore->numSatellites == (4 + mult))
{
dataStore->allDataSet |= CONSTELLATIONX;
}
return 0;
}