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Thanks for your response.

The 200 KHz master is an old Motorola embedded CPU. I want to run a PID control algorithm on the PIC, with the control output being SPI writes to the DAC. The time frame ...

I hope I haven't painted myself into a corner, but this could be something of a problem.

I have a PIC18F2420 with one hardware SPI port that needs to receive serial data, then transmit serial data ...

Thanks for the info on ASCII-encoded hex files. I will look at the CCS bootloader.

Unless there is something I don't know about, which is entirely possible, SPI bootloaders are relatively inaccess ...

I want to start by thanking all those who have helped me with the finer points of PICs and the CCS compiler. I'm a hardware guy by training, so this is somewhat new to me.

It is desireable to have ...

You do presumably realise that there is nothing 'special' about the defines used by CCS, and that you can perfectly well create your own?. The top byte is what goes to the SSPSTAT register, and the lo ...

I am using the PCM18SX0 processor module. So far I am unable to find an errata sheet for it, although I hope it does not have the bug described for the PCM18AX0/BX0.

I have been looking at the clo ...

I am still having trouble getting valid data in using SPI2 slave mode. As best I can tell, it tends to skip the first bit of a 3-byte series, and zero the last bit. The last data bit of the series d ...

I'm glad you explained how you came to that conclusion. That technique might help me solve problems in the future.

Thanks again,

Thanks! I would have never guessed, and I sure didn't see that in the CCS manual. I would much prefer hardware SPI to bit-banging.

Very Happy

Compiler is 3.234, pretty new.

I'm having trouble reading in valid data on the second SPI port of the PIC18F8722. Compiler is ver 3.234.

SPI port 1 is currently used to write to 5 other ICs, one of which can also be successfull ...

You are correct on the Schmidt trigger threshold, which is the type of input I would expect to be configured for SPI operation. Perhaps this is a case of emulator vs PIC, or the specification and typ ...

I'm embarassed to admit this, but in the interest of full disclosure . . .

The PIC demo board had a 7.5K pullup on the SPI input line only (SDA/RC4).

Thanks for your help.

It does like like t ...

You have presumably configured JP1?.
This is _required_ if you are using the ICE module on the board (forces the processor into a reset state).
Page 50 of the manual.

Best Wishes

Looking at th ...

Thanks for all the help. Here is what I've found:

CCS ver 3.231

This odd pullup behavior on the SDI (port 0) input is only present when the emulator is connected to the picdemo board. When I d ...