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esp32_Adafruit_GPS
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Merge pull request #87 from sellensr/master 

Add 115200 bps and parse $GPGLL
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Matt Goodrich 2019-04-16 14:18:16 -04:00 committed by GitHub
parent 85195eeeb9 b431f20491
commit 90f059091d
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 86 additions and 2 deletions
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83
Adafruit_GPS.cpp
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@ -285,6 +285,89 @@ boolean Adafruit_GPS::parse(char *nmea) {
// we dont parse the remaining, yet!
return true;
}
if (strStartsWith(nmea, "$GPGLL")) {
// found GLL
char *p = nmea;
// parse out latitude
p = strchr(p, ',')+1;
if (',' != *p)
{
strncpy(degreebuff, p, 2);
p += 2;
degreebuff[2] = '\0';
long degree = atol(degreebuff) * 10000000;
strncpy(degreebuff, p, 2); // minutes
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
long minutes = 50 * atol(degreebuff) / 3;
latitude_fixed = degree + minutes;
latitude = degree / 100000 + minutes * 0.000006F;
latitudeDegrees = (latitude-100*int(latitude/100))/60.0;
latitudeDegrees += int(latitude/100);
}
p = strchr(p, ',')+1;
if (',' != *p)
{
if (p[0] == 'S') latitudeDegrees *= -1.0;
if (p[0] == 'N') lat = 'N';
else if (p[0] == 'S') lat = 'S';
else if (p[0] == ',') lat = 0;
else return false;
}
// parse out longitude
p = strchr(p, ',')+1;
if (',' != *p)
{
strncpy(degreebuff, p, 3);
p += 3;
degreebuff[3] = '\0';
degree = atol(degreebuff) * 10000000;
strncpy(degreebuff, p, 2); // minutes
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
minutes = 50 * atol(degreebuff) / 3;
longitude_fixed = degree + minutes;
longitude = degree / 100000 + minutes * 0.000006F;
longitudeDegrees = (longitude-100*int(longitude/100))/60.0;
longitudeDegrees += int(longitude/100);
}
p = strchr(p, ',')+1;
if (',' != *p)
{
if (p[0] == 'W') longitudeDegrees *= -1.0;
if (p[0] == 'W') lon = 'W';
else if (p[0] == 'E') lon = 'E';
else if (p[0] == ',') lon = 0;
else return false;
}
// get time
p = strchr(p, ',')+1;
float timef = atof(p);
uint32_t time = timef;
hour = time / 10000;
minute = (time % 10000) / 100;
seconds = (time % 100);
milliseconds = fmod(timef, 1.0) * 1000;
p = strchr(p, ',')+1;
// Serial.println(p);
if (p[0] == 'A')
fix = true;
else if (p[0] == 'V')
fix = false;
else
return false;
return true;
}
return false;
}

5
Adafruit_GPS.h
View File

@ -51,8 +51,9 @@
#define PMTK_API_SET_FIX_CTL_5HZ "$PMTK300,200,0,0,0,0*2F" ///< 5 Hz
// Can't fix position faster than 5 times a second!
#define PMTK_SET_BAUD_57600 "$PMTK251,57600*2C" ///< 57600 bps
#define PMTK_SET_BAUD_9600 "$PMTK251,9600*17" ///< 9600 bps
#define PMTK_SET_BAUD_115200 "$PMTK251,115200*1F" ///< 115200 bps
#define PMTK_SET_BAUD_57600 "$PMTK251,57600*2C" ///< 57600 bps
#define PMTK_SET_BAUD_9600 "$PMTK251,9600*17" ///< 9600 bps
#define PMTK_SET_NMEA_OUTPUT_RMCONLY "$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29" ///< turn on only the second sentence (GPRMC)
#define PMTK_SET_NMEA_OUTPUT_RMCGGA "$PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28" ///< turn on GPRMC and GGA