Reading various SFRs at run time

kgn340 · Joined: 12 Jan 2004 Posts: 5

Hi all,
I'm working with the PIC18F8722 and have developed a simple user interface.

To aid in debugging, I would like to be able to read various Special Function Registers (T3CON, ADCON0, T1CON, etc) at run time.

Is there some time of read that will allow me to index into the SFRs?
ie. SFR_READ ( 0xFCD ) would read T1CON.

Thanks,
kevin

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Use the CCS #byte directive to declare the address of the SFR register.
Look up the address in the PIC's data sheet, or use a pre-made SFR
declarations file:
http://www.ccsinfo.com/forum/viewtopic.php?t=14755
Then treat the declared register name as a normal variable.
Example:

kgn340 · Joined: 12 Jan 2004 Posts: 5

I guess I didn't make myself clear enough.

In my program I would like the ability to read *any* SFR register, not just hard coded ones.

if possible, it will help me debug a set of operating issues as they arise.

is this possible?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

See this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=23368

kgn340 · Joined: 12 Jan 2004 Posts: 5

AWESOME!!!

that's what it was.

THANK YOU!!!