i2c for other purposes (2 replies)

Hello! I am using repetier on a rambo and want to use the i2c capabilities for communicating with another Arduino.

I uploaded an example sketch to the rambo and another arduino and have them talking to each other fine. When I try to add this into the Repetier firmware I get trouble.

I have a simple example:

HAL::i2cStartWait(4);
HAL::i2cWrite('a');
HAL::i2cStop();

This code fails when it gets to the write step. I am in a bit over my head here and would appreciate any advice someone might have. I can't find any examples of i2c being used aside from write commands everywhere. Where is i2c being initialized? How is it used?

Thanks!