!Help! RS232 OERR ERRORS

ccarty · Joined: 20 Apr 2004 Posts: 2

I am using the #USE RS232 pre-processor directive as follows.
#use rs232(baud=9600,xmit=PIN_B2,rcv=PIN_B1,bits=8,parity=N,errors)
This is on a pic16f648A, using the hardware usart.

My question is:

When errors is added as an option, are both framing and overun errors cleared automatically?

I think that I have been able to create an OERR and it does not appear that it was cleared.

Thanks for your help.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

What is your version of the compiler ?

Look at this thread in the archives. If you have the same
problem, you may have to email CCS for a solution.
http://www.ccsinfo.com/forum/viewtopic.php?t=17251&highlight=16f648a

ccarty · Joined: 20 Apr 2004 Posts: 2

PCM compiler version 3.184 ........the project compiles fine. I am questioning whether or not the OERR error is cleared automatically or if I need to check/clear it manually.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

I did a test compile with PCM vs. 3.184 for the 16F648A, and it
does generate code for the hardware USART. So that's OK.

Here is the generated code for the CCS library routine "getch".
It shows that they do check the OERR bit, and if it's set, they
clear it by toggling the CREN bit (per the data sheet).

Guest · Posted: Tue Apr 20, 2004 1:41 pm

thanks for your help...