Diff: GPSParser.cpp
- Revision:
- 1:e143afe9a7ea
- Parent:
- 0:01c9f535e512
- Child:
- 2:6f49c74ab3b9
--- a/GPSParser.cpp Tue Mar 27 04:39:16 2012 +0000
+++ b/GPSParser.cpp Wed Mar 28 21:25:38 2012 +0000
@@ -1,108 +1,108 @@
-#include "GPSParser.h"
-
-
-const int GLL = 0, RMC = 0, VTG = 1, GGA = 1, GSA = 0, GSV = 0, GRS = 0, GST = 0, MALM = 0, MEPH = 0, MDGP = 0, MDBG = 0, ZDA = 0, MCHN = 0; //refer to http://aprs.gids.nl/nmea/#gll for NMEA 0183 sentences
-volatile bool buffer_ready = false;
-volatile int num_sentences = 0;
-volatile int ctr = 0;
-typedef struct
-{
- float latitude, lat_deg, lat_min, deg_latitude, longitude, long_deg, long_min, deg_longitude, altitude, HDOP, geoidal_sep, AODC, heading, mag_heading, speed_knots, speed_kph;
- char ns, ew, mode;
- int hours, minutes, seconds, m_seconds, fix, sats_used, DGPS_ID;
- unsigned short checksum_gga, checksum_vtg;
-} GPS;
-
-GPS _gps;
-
-void gps_init (int num_sentence, MODSERIAL &gps)
-{
- num_sentences = num_sentence;
- // BEGIN CONFIGURATION OF GPS use http://www.hhhh.org/wiml/proj/nmeaxor.html for checksum calculations...
- gps.printf ("$PMTK313,1*2E\r\n"); //enable SBAS satellite searching
- gps.printf ("$PMTK301,2*2E\r\n"); //set DGPS mode to WAAS
- gps.printf ("$PMTK314,%d,%d,%d,%d,%d,%d,%d,%d,0,0,0,0,0,%d,%d,%d,%d,%d,%d*28\r\n", GLL, RMC, VTG, GGA, GSA, GSV, GRS, GST, MALM, MEPH, MDGP, MDBG, ZDA, MCHN); //enable NMEA output sentences and frequencies
- // END CONFIGURATION OF GPS
- wait (0.1);
- gps.rxBufferFlush ();
- gps.attach (&ready_buffer, MODSERIAL::RxIrq);
-}
-
-void ready_buffer (MODSERIAL_IRQ_INFO *q)
-{
- MODSERIAL *serial = q->serial;
-
- if (serial->rxGetLastChar() == '\n')
- ctr++;
-
- if (ctr == num_sentences)
- {
- buffer_ready = true;
- ctr = 0;
- }
-}
-
-void read_gps (MODSERIAL &gps, MODSERIAL &pc)
-{
- char buff [num_sentences][128];
- gps.attach (&ready_buffer, MODSERIAL::RxIrq);
-
- //while (!buffer_ready);
-
- for (int i = 0; i < num_sentences; i++)
- {
- for (int k = 0; k < 128; k++)
- {
- buff [i][k] = gps.getc();
- if (buff [i][k] == ',' && buff [i][k - 1] == ',') // if the current and last character read were both ',' then assign the next buff position ',' and the current buff position a '0' and increment k by one.
- {
- buff [i][k + 1] = buff [i][k];
- buff [i][k] = '0';
- k++;
- }
- if (buff [i][k] == '*' && buff [i][k - 1] == ',') // if the current character is '*' and last character read were both ',' then assign the next buff position '*' and the current buff position a '0' and increment k by one.
- {
- buff [i][k + 1] = buff [i][k];
- buff [i][k] = '0';
- k++;
- }
- //pc.putc (buff [i][k]);
- if (buff [i][k] == '\n')
- {
- k++;
- buff [i][k] = '\0';
- break;
- }
- }
- }
-
- for (int i = 0; i < num_sentences; i++)
- {
- if (!sscanf (buff [i], "$GPGGA,%2d%2d%2d.%3d,%f,%c,%f,%c,%d,%d,%f,%f,M,%f,M,%f,%X*%hX\r\n", &_gps.hours, &_gps.minutes, &_gps.seconds, &_gps.m_seconds, &_gps.latitude, &_gps.ns, &_gps.longitude, &_gps.ew, &_gps.fix, &_gps.sats_used, &_gps.HDOP, &_gps.altitude, &_gps.geoidal_sep, &_gps.AODC, &_gps.DGPS_ID, &_gps.checksum_gga))
- sscanf (buff [i + 1], "$GPGGA,%2d%2d%2d.%3d,%f,%c,%f,%c,%d,%d,%f,%f,M,%f,M,%f,%X*%hX\r\n", &_gps.hours, &_gps.minutes, &_gps.seconds, &_gps.m_seconds, &_gps.latitude, &_gps.ns, &_gps.longitude, &_gps.ew, &_gps.fix, &_gps.sats_used, &_gps.HDOP, &_gps.altitude, &_gps.geoidal_sep, &_gps.AODC, &_gps.DGPS_ID, &_gps.checksum_gga);
-
- if(!sscanf (buff [i], "$GPVTG,%f,T,%f,M,%f,N,%f,K,%c*%hX\r\n", &_gps.heading, &_gps.mag_heading, &_gps.speed_knots, &_gps.speed_kph, &_gps.mode, &_gps.checksum_vtg))
- sscanf (buff [i + 1], "$GPVTG,%f,T,%f,M,%f,N,%f,K,%c*%hX\r\n", &_gps.heading, &_gps.mag_heading, &_gps.speed_knots, &_gps.speed_kph, &_gps.mode, &_gps.checksum_vtg);
-
- pc.printf ("%s", buff [i]);
- }
- if (_gps.ns == 'S')
- _gps.latitude *= -1.0f;
-
- if (_gps.ew == 'W')
- _gps.longitude *= -1.0f;
-
- _gps.lat_deg = (int)(_gps.latitude / 100);
- _gps.lat_min = _gps.latitude - (_gps.lat_deg * 100.0f);
- _gps.deg_latitude = _gps.lat_deg + _gps.lat_min / 60.0f;
- _gps.long_deg = (int)(_gps.longitude /100);
- _gps.long_min = _gps.longitude - (_gps.long_deg * 100.0f);
- _gps.deg_longitude = _gps.long_deg + _gps.long_min / 60.0f;
-
- //pc.txBufferFlush();
- //pc.printf ("%X,%X,[HH:MM:SS:SSS %02d:%02d:%02d:%03d],%f,%f,%f,%c\r\n", _gps.checksum_gga, _gps.checksum_vtg, _gps.hours, _gps.minutes, _gps.seconds, _gps.m_seconds, _gps.deg_latitude, _gps.deg_longitude, _gps.heading, _gps.mode);
-
- //gps.txBufferFlush ();
- gps.rxBufferFlush ();
- buffer_ready = false;
-}
\ No newline at end of file
+#include <GPSParserCpp.h>
+
+GPSParser::GPSParser (PinName tx, PinName rx, int baud, int num_sentence, MODSERIAL &pc)
+:
+ GLL (0),
+ RMC (0),
+ VTG (1),
+ GGA (1),
+ GSA (0),
+ GSV (0),
+ GRS (0),
+ GST (0),
+ MALM (0),
+ MEPH (0),
+ MDGP (0),
+ MDBG (0),
+ ZDA (0),
+ MCHN (0),
+ num_sentences (num_sentence),
+ baudrate (baud),
+ ctr (0),
+ gps (tx, rx),
+ pc (pc)
+{
+ pc.printf ("Initializing GPS...\r\n");
+ gps.baud (baudrate);
+
+ // BEGIN CONFIGURATION OF GPS use http://www.hhhh.org/wiml/proj/nmeaxor.html for checksum calculations...
+ gps.printf ("$PMTK313,1*2E\r\n"); //enable SBAS satellite searching
+ gps.printf ("$PMTK301,2*2E\r\n"); //set DGPS mode to WAAS
+ gps.printf ("$PMTK314,%d,%d,%d,%d,%d,%d,%d,%d,0,0,0,0,0,%d,%d,%d,%d,%d,%d*28\r\n", GLL, RMC, VTG, GGA, GSA, GSV, GRS, GST, MALM, MEPH, MDGP, MDBG, ZDA, MCHN); //enable NMEA output sentences and frequencies
+ // END CONFIGURATION OF GPS
+ wait (0.1);
+ gps.rxBufferFlush ();
+ gps.attach (this, &GPSParser::ready_buffer);
+}
+
+void GPSParser::process_readings ()
+{
+ char buff [num_sentences][128];
+ //gps.attach (this, &GPSParserCpp::ready_buffer);
+
+ for (int i = 0; i < num_sentences; i++)
+ {
+ for (int k = 0; k < 128; k++)
+ {
+ buff [i][k] = gps.getc();
+ if (buff [i][k] == ',' && buff [i][k - 1] == ',') // if the current and last character read were both ',' then assign the next buff position ',' and the current buff position a '0' and increment k by one.
+ {
+ buff [i][k + 1] = buff [i][k];
+ buff [i][k] = '0';
+ k++;
+ }
+ if (buff [i][k] == '*' && buff [i][k - 1] == ',') // if the current character is '*' and last character read were both ',' then assign the next buff position '*' and the current buff position a '0' and increment k by one.
+ {
+ buff [i][k + 1] = buff [i][k];
+ buff [i][k] = '0';
+ k++;
+ }
+ //pc.putc (buff [i][k]);
+ if (buff [i][k] == '\n')
+ {
+ k++;
+ buff [i][k] = '\0';
+ break;
+ }
+ }
+ }
+
+ for (int i = 0; i < num_sentences; i++)
+ {
+ if (!sscanf (buff [i], "$GPGGA,%2d%2d%2d.%3d,%f,%c,%f,%c,%d,%d,%f,%f,M,%f,M,%f,%X*%hX\r\n", &readings.hours, &readings.minutes, &readings.seconds, &readings.m_seconds, &readings.latitude, &readings.ns, &readings.longitude, &readings.ew, &readings.fix, &readings.sats_used, &readings.HDOP, &readings.altitude, &readings.geoidal_sep, &readings.AODC, &readings.DGPS_ID, &readings.checksum_gga))
+ sscanf (buff [i + 1], "$GPGGA,%2d%2d%2d.%3d,%f,%c,%f,%c,%d,%d,%f,%f,M,%f,M,%f,%X*%hX\r\n", &readings.hours, &readings.minutes, &readings.seconds, &readings.m_seconds, &readings.latitude, &readings.ns, &readings.longitude, &readings.ew, &readings.fix, &readings.sats_used, &readings.HDOP, &readings.altitude, &readings.geoidal_sep, &readings.AODC, &readings.DGPS_ID, &readings.checksum_gga);
+
+ if(!sscanf (buff [i], "$GPVTG,%f,T,%f,M,%f,N,%f,K,%c*%hX\r\n", &readings.heading, &readings.mag_heading, &readings.speed_knots, &readings.speed_kph, &readings.mode, &readings.checksum_vtg))
+ sscanf (buff [i + 1], "$GPVTG,%f,T,%f,M,%f,N,%f,K,%c*%hX\r\n", &readings.heading, &readings.mag_heading, &readings.speed_knots, &readings.speed_kph, &readings.mode, &readings.checksum_vtg);
+
+ pc.printf ("%s", buff [i]);
+ }
+ if (readings.ns == 'S')
+ readings.latitude *= -1.0f;
+
+ if (readings.ew == 'W')
+ readings.longitude *= -1.0f;
+
+ readings.lat_deg = (int)(readings.latitude / 100);
+ readings.lat_min = readings.latitude - (readings.lat_deg * 100.0f);
+ readings.deg_latitude = readings.lat_deg + readings.lat_min / 60.0f;
+ readings.long_deg = (int)(readings.longitude /100);
+ readings.long_min = readings.longitude - (readings.long_deg * 100.0f);
+ readings.deg_longitude = readings.long_deg + readings.long_min / 60.0f;
+
+ gps.rxBufferFlush ();
+}
+
+virtual void GPSParser::ready_buffer(MODSERIAL_IRQ_INFO *q);
+{
+ MODSERIAL *serial = q->serial;
+
+ if (serial->rxGetLastChar() == '\n')
+ ctr++;
+
+ if (ctr == num_sentences)
+ {
+ read_gps();
+ ctr = 0;
+ }
+};
\ No newline at end of file
Kartik Jangam