PIC18 Slave Select Pin and ADC

[neohimura]

I'm trying to communicate two PIC18F4550 using SPI. On my slave PIC18, I want to use all available ADC pins (AN0-AN12). Since the SPI Slave Select (SS) pin shares with AN4, is it possible for me to change the slave select pin to another I/O pin?
Thank you.

[PCM programmer]

See this thread where the issue is discussed by Ttelmah:
http://www.ccsinfo.com/forum/viewtopic.php?t=44392

[Ttelmah]

Simple answer, is to not use slave select....
You can run SPI without any select at all, for point to point communication. Only problem is if the devices loose 'sync'. However, you can get a similar action, using any other pin. Just have the master setup the SPI port, then set or clear it's 'select' pin, _then wait_ for a mSec or so, before starting transmission.
Have the slave sit monitoring this pin, and when it sees it go to the 'selected' state, reset the SPI hardware. This way the SPI will resynchronise if needed.

Best Wishes

[neohimura]

It works now. I had to remove the analog input for AN4 and use that pin for Slave select. Thank you for your help PCM programmer and Ttelmah.