Hi everyone,

I have some problems with the project I am working on, and I need your
help!

1.      I have 2 devices on the SPI bus (one 16-bit and one 8-bit).
Each device has its own Chip Select signal.  What I want to do is:

For 16-bit device
            Select the chip
            Send 16 bits of data
            Deselect the chip

For 8-bit device
            Select the chip
            Send 8 bits of data
            Deselect the chip

I have no problem writing the code for multiple 8-bit devices, but when
it comes to a mixture of 8-bit and 16-bit devices, I am totally stuck.
I am thinking of using a variable in the ISR to indicate whether it is a
8-bit or 16-bit device, but I think it needs Mutual Exclusion.  I am
using the 16F877.  Please help!

2.      The SPI module on the 16F877 can be configured to run at
different speed.  Don't we always want to run it at the fastest speed?

Thank you for your help!
Best regards,
Thomas

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