Hi E,hi C,
Looking at all the additional inputs to these PIC's and the way they are all cross connected in that edited drawing, shows IMHO it is too complex a project for you to develop/complete using the Oshonsoft IDE
I would recommend that you review the project specification and its purpose.
Eric
So far I've been mainly working on the TRANSMITTER, and all of the modules are working apart from the SLAVE HW SPI sending DEGREES.
Following a similar comment from you a few posts ago, I have now built another PCB with a 4xway MUX switch. Using 3x INPUTS to the MASTER UART (RADIO, COMPASS and DEGREES), I can test that before going any farther.
C.