Read a GPS through a Serial Port

[androb4]

Originally Posted by ktrobotcreator

I know there have definitely been updates since January 20, but I don't remember seeing anything about Serial Ports. If that's the case then this may all be a lost cause, even with a converter...

Alternatively you can read the GPS data via the arduino's serial port, then send that data over I2C to the digital sidecar.

[ktrobotcreator]

Originally Posted by androb4

Alternatively you can read the GPS data via the arduino's serial port, then send that data over I2C to the digital sidecar.

Hmmm... Thanks for the suggestion, we can check that out next time we meet.

[androb4]

Originally Posted by ktrobotcreator

Hmmm... Thanks for the suggestion, we can check that out next time we meet.

No problem.

[Mike Bortfeldt]

Originally Posted by androb4

Alternatively you can read the GPS data via the arduino's serial port, then send that data over I2C to the digital sidecar.

If you use I2C to communicate between the cRIO and Arduino, be sure to "setCompabilityMode(true)" on the I2c object otherwise you will probably experience sporatic communication failures. Also, there is a bug in the i2c.java code that treats all sent data bytes (cRIO to Arduino) as signed instead of unsigned (java doesn't have an unsigned byte), this causes it overwrite some bytes with a 255 (0xFF) when it combines the bytes into 32 bit integers prior to transmitting. This bug has been fixed for the next release of WPILib, but probably still resides in your code. You can fix this yourself if it becomes a problem.

Mike