GPS NMEA sentence decoder macro

ian · October 23, 2023, 10:52am

Macro (2) in UART mode uses minmea to decode many common GPS sentences. Press any key to exit.

I also updated the firmware manual.

Any other UART mode macros you’d like to see?

BusPirateV5 · October 25, 2023, 5:18am

PASHR is Trimble’s INS messages. What would it take to add that in to decode?

ian · October 25, 2023, 8:14am

github.com

kosma/minmea/blob/master/minmea.c#L87


      
                  sentence++;
              }
              
              if (*sentence) {
                  return false;
              }
          
              return true;
          }
          
          bool minmea_scan(const char *sentence, const char *format, ...)
          {
              bool result = false;
              bool optional = false;
          
              if (sentence == NULL)
                  return false;
          
              va_list ap;
              va_start(ap, format);

It seems like this function takes a list of variable types to expect and parses them out. Adding a new sentence is probably a matter of figuring out the formatting string and running it through here.

BusPirateV5 · October 25, 2023, 2:18pm

Awesome. Thanks for the quick rundown! I might take a look at that if I find erroneous data on the Trimble INS.