Replies to This Discussion

Permalink Reply by Ajienux on April 6, 2012 at 9:58am

bump, same problem here

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Permalink Reply by charles1317 on April 6, 2012 at 10:32pm

Look in the arduino.pde program for the place that controls the flashing of the blue light for the GPS. You will find two case statements and a default statement. The two case statements are backwards case 2 is first. I changed this to only turn on the light if gps.fix is true. You don't have to do this but I did it anyway. The second case statement causes the light to flash with no lock. Comment out everything from the default statement to the break statement, and your blue led will work correctly. It will flash when there is no lock and go solid when there is one. Not at a computer now so I can't give you line numbers.

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Permalink Reply by Ajienux on April 6, 2012 at 11:00pm

arduino.pde or arduimu.pde :)
i will try, thanks

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Permalink Reply by Ajienux on April 7, 2012 at 12:37am

mmm... did u mean this code ;

// GPS Fix indication
                                switch (GPS.status()) {
                                        case(2):
                          digitalWrite(BLUE_LED_PIN,HIGH);  //Turn Blue LED when gps is fixed.
                                              break;
                                              
                                        case(1):
                                              if (GPS.valid_read == true){
                                                    toggleMode = abs(toggleMode-1); // Toggle blue light on and off to indicate NMEA sentences exist, but no GPS fix lock
                                                    if (toggleMode==0){
                                                          digitalWrite(BLUE_LED_PIN, LOW); // Blue light off
                                                    } else {
                                                          digitalWrite(BLUE_LED_PIN, HIGH); // Blue light on
                                                    }
                                                    GPS.valid_read = false;
                                              }
                                              break;
                                              
                                        default:
                                              digitalWrite(BLUE_LED_PIN,LOW);
                                              break;
                }

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Permalink Reply by charles1317 on April 7, 2012 at 8:37am

Yes, that's it. Here's what mine looks like now.

                            // GPS Fix indication

                                switch (GPS.status())

                                {

                                        case(2):

                                                 if (GPS.fix = 1)

                                                {

                                                  digitalWrite(BLUE_LED_PIN,HIGH);  //Turn Blue LED on when gps is fixed.

                                                }

                                                  else

                                                  {

                                                    digitalWrite(BLUE_LED_PIN,LOW);  //Turn Blue LED off when gps is not fixed.

                                                  }

                                                 

                                                  break;

                                             

                                        case(1):

                                              if (GPS.valid_read == true)

                                              {

                                                    toggleMode = abs(toggleMode-1); // Toggle blue light on and off to indicate NMEA sentences exist, but no GPS fix lock

                                                    if (toggleMode==0)

                                                    {

                                                          digitalWrite(BLUE_LED_PIN, LOW); // Blue light off

                                                    }

                                                      else

                                                      {

                                                          digitalWrite(BLUE_LED_PIN, HIGH); // Blue light on

                                                      }

                                                GPS.valid_read = false;

                                              }

                                              break;

                                             

                                      /*  default:

                                              digitalWrite(BLUE_LED_PIN,LOW);

                                              break; */

                                                                }

                                                                break;

                                                                

Charles

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Permalink Reply by Ajienux on April 7, 2012 at 8:46am

charles i love u :) . wow great, working good...
very much thank charles...

nice... :)

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Permalink Reply by charles1317 on April 7, 2012 at 9:30am

After looking at this a bit more I think you can achieve the same thing by making a minor change to GPS.cpp. 

Here it is:

#include "GPS.h"
#include "WProgram.h"

int
GPS::status(void)
{
if (millis() - _lastTime >= 500){
return 0;
} else if (fix == 0) {
return 1;
} else {
return 2;
}
}

void
GPS::_setTime(void)
{
_lastTime = millis();
}

In here if the update time is greater then 500 millis it will return a zero and this will cause the switch to call the default statement. One of the problems with the EM406 is that it is slow. If you change the the compare from 500 to 1000 it would probably work without changing the arduimu program. If this works it would be a much better fix than my first example.

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Permalink Reply by Ajienux on April 7, 2012 at 11:00pm

Done, Solved, i change to 1000 :) , and first code back to begin
charles thank you very much,

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Permalink Reply by charles1317 on April 7, 2012 at 8:20am

oops, yes arduimu. :)

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