uint8_t MG2639_Cell::begin(unsigned long baud)
{
unsigned long setBaud = 0;
uint8_t tries = 0;
initializePins(); // Set up power and UART pin direction
initializeUART(baud); // Initialize UART to requested baud
// Try turning echo off first (send ATE0 command). If it succeeds,
// we're already at the target baud and the module's on.
if (setEcho(0) <= 0)
{
// If setEcho fails, we can't communicate with the shield. The baud
// may be incorrect, or the shield may be off. First time in, we'll
// assume the module is on.
// tries should be at least > 2 - one time assuming module is on,
// another time assuming module is off
while (setBaud <= 0 && tries < 4)
{
setBaud = autoBaud(); // Try to find the baud rate
if (setBaud <= 0)
{
// If autoBaud fails to find anything, the module must be off.
powerPulse(); // Send a power pulse (hold PWRKEY for 3s)
delay(MODULE_WARM_UP_TIME); // Delay ~3s for module to warm up
}
tries++; // Increment tries and go again
}
// If we still can't find the baud rate, or communicate with the shield
// we give up. Return a fail.
if (setBaud <= 0)
return 0;
// If autoBaud succeeds, the module is on, we just need to
// change the baud rate.
if (setBaud != baud)
{
int baudRsp;
#if (ARDUINO >= 10601)
// Software serial after 1.6.1 works much better, no need for brute force
baudRsp = changeBaud(setBaud, baud);
#else
baudRsp = bruteForceBaudChange(setBaud, baud, 100);
#endif
// Look for any error _except_ ERROR_UNKOWN_RESPONSE -- a change from
// 115200 will result in that error, even though the change baud
// worked. (SoftwareSerial can't read reliably at that high rate.)
if ((baudRsp == 0) || (baudRsp == ERROR_FAIL_RESPONSE) ||
(baudRsp == ERROR_TIMEOUT))
{
return 0;
}
}
delay(COMMAND_RESPONSE_TIME);
}
return 1;
}
/*
Set baud rate and various message frequencies.
*/
void Gps::setupGps() {
/*
Value Description
0 GGA Fix information
1 GLL Lat/Lon data
2 GSA Overall Satellite data
3 GSV Detailed Satellite data
4 RMC Recommended minimum info
5 VTG Vector track an Speed over the Ground
6 MSS (If internal beacon is supported)
7 Not defined
8 ZDA (if 1PPS output is supported)
9 Not defined
*/
autoBaud();
//Serial1.begin(38400, 8, 1, 0); //gps
//set debug on
Serial1.println("$PSRF105,1*3E");
//set VTG off - Vector track an Speed over the Ground
Serial1.println("$PSRF103,05,00,00,01*21");
//set GLL off - Lat/Lon data
Serial1.println("$PSRF103,01,00,00,01*25");
//set GGA on, 5sec, constant - Fix information
Serial1.println("$PSRF103,00,00,05,01*21");
//set GSA on, 5 sec, constant - Overall Satellite data
Serial1.println("$PSRF103,02,00,05,01*23");
//set GSV on, 20sec, constant -Detailed Satellite data
Serial1.println("$PSRF103,03,00,20,01*25");
//set RMC on, 1sec, constant, Recommended minimum info
Serial1.println("$PSRF103,04,00,01,01*21");
//get debug
//delay(1000);
// while (Serial1.available() > 0) {
// Serial.print(Serial1.read());
// }
//debug off
Serial1.println("$PSRF105,0*3F");
//set baud faster ?
//GPS SIRF configuration strings...
//#define SIRF_BAUD_RATE_4800 "$PSRF100,1,4800,8,1,0*0E\r\n"
//#define SIRF_BAUD_RATE_9600 "$PSRF100,1,9600,8,1,0*0D\r\n"
//#define SIRF_BAUD_RATE_19200 "$PSRF100,1,19200,8,1,0*38\r\n"
//#define SIRF_BAUD_RATE_38400 "$PSRF100,1,38400,8,1,0*3D\r\n"
//#define SIRF_BAUD_RATE_57600 "$PSRF100,1,57600,8,1,0*36\r\n"
//$PSRF100,1,38400,8,1,0*3D\r\n
Serial1.print("$PSRF100,1,38400,8,1,0*3D\r\n");
Serial1.flush();
Serial1.end();
Serial1.begin(38400);
}
