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What are you doing with the SS pin? Also search for this text in the data sheet 'disabling the SDO output.'

I did see the note you are talking about.

the SPI is in Slave mode with SS
pin c ...

Put this is the slave

While(1)
{ x = spi_read(0xAA);
}

Using that code on the slave and changing TRISC to 0x7F I was able to get the value of 'x' to be ...

I was able to get the master working alone using this code:

setup_spi(spi_master | spi_l_to_h | spi_clk_div_64 );

while(true)
{
byte2 = spi_read(21); //start swapping bytes
delay_us(50); ...

How about writing a simple program to toggle the clock and data lines. That will tell you if the lines are stuck from a hardware fault. Toggle them from low to high Z to exercise the pull-up resisto ...

They don't.
This would only apply with soft SPI. Also if this was th problem, the resistor would still pull the input up fine.
You are aware that the SDO pin on one chip needs to connect to the SDI ...

If the signal is only changing by 0.5v, you need to look again at the wiring. The signals should be good solid logic lines. Disable the master, and see if the line can be pulled high/low by you with ...

I know this has been talked about many times before, but I'm having different problems then were addressed in the archives. I�m trying to get an 18F8720 (master) to talk to an 18F2431 (slave), both r ...

Thanks, I've actually looked at that example before but it's not exactly what I need. I need and example of setup and use of the Input Capture module that is on the 18fxx31 chips.

Does anyone have any examples in C on how to use Input Capture with an 18F2431 or any 18Fxx31 chip? I downloaded the latest version of the CCS software, looked in the 18f2431.h file and didn't see an ...