modifying the example CCS one wire protocol

[mikem]

Hi all,

I am trying to modify the CCS example one wire interface to communciate between pics. The pics being used are the pic24f16a101.
The one wire will be connected to the rx uart on both pics. Unfortunately the pin selection is fixed as the hardware is already created.

If possible I might make use of the rx uart however I will start out with the bit bashed software version to get something working. My problem is that I am not connecting to the external interrupt pin on the pics.

I am not sure if I can easily modify the code to configure the pin to:

- receive a interrupt and fix the ISR accordingly to sense a change in level on the pin

- receive the corresponding data in software (or hardware using the rx uart hardware) on the rx uart pin

- transmit on on the same pin

I am guessing all of this is possible but I just have to write more clever C to deal with the change in configuration.

Any help would be much appreciated!!

Cheers
Mike

[FvM]

[mikem]

Hi FVM,

Thanks for your feedback. I agree that just using a bit bashed software implementation for the one wire interface is probably easiest.

Thanks again for your help.

Mike