Soft-RS232 kills SPI

[Roebi]

My application runs on a 16F76. It uses The UART as well as SPI - both are on port C. In order to debug my program I added:

#use rs232(baud=19200,parity=N,xmit=PIN_C0,rcv=PIN_C1,bits=8,DISABLE_INTS,stream=dbgs)

also on port C. While the soft-RS232 works fine - e. g. with the statement

fprintf(dbgs,"\r\naci:%2u",aci);

it has the ugly side effect, that the SPI no longer works. There are just no more clock pulses when calling the built in function spi_write or spi_read.

Who knows a remedy against this? Thanks for help.
Robert

[PCM programmer]

This might be a TRIS problem.

1. Post a small, simple program that demonstrates the problem.
Just a few lines of code. Make sure to post all of your #use,
#fuses, #include and #device statements.

2. Post your compiler version. It's given at the top of the .LST
file, which is in your project folder. It will be a number such
as 3.191 or 3.242, etc.

[Roebi]

It is indeed a TRISC-problem . Following any call to

fprintf(dbgs,....etc

the TRISC-bits 3..5 are all ones. No supprise SPI does not work anymore. The work-around is to set TRISC prior to any use of spi_read or spi_write. But - hellas - why does the soft-RS232-code mess around with bits of TRISC that are absolutely not its business?

I am using PCW V3.242

[ckielstra]

As was told you before: post a small compilable program that demonstrates your problem. We know it will take you some effort to produce such a program, but you want our help, so don't put the effort on us.
The easier you make it for us to investigate your problem, the quicker and better responses you'll get.