Unable to debug 16F887 w/ICD-U40

eyewonder300 · Joined: 09 Jun 2004 Posts: 52

I am able to use the debug functions of the CCS compiler IDE when using a PIC16F877A, but when I plug in a 16F887, adjust the fuses as appropriate and recompile, I can not get the debug functions to work. I just get a boat-load of verification errors. I CAN program the F887 & it verifies OK - it's just the debug that will not work.

CCS v4.069
ICD-U40
Unit: ICD-S
Product ID: 0
Firmware: 1.39
PCB Rev: 0
Name: 00CD91IO

Anyone see something obvious that I should be doing?

Cheers,
Steve

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

See this thread:

Verification Problem Please Help
http://www.ccsinfo.com/forum/viewtopic.php?t=34998

eyewonder300 · Joined: 09 Jun 2004 Posts: 52

PCM,

I had already come across that thread, had read the errata sheet about grounding PIN_B3 if unable to program, BUT ... I was able to program the chip as long as I had the debug features commented out in the header. I never received any verification errors when doing a straight program, only when the debug features were set up.

Doesn't the debug info from the chip come out PIN_B3 thru pin 6 of the ICD connector? If it does, and that line was grounded, you could not receive any debug info.

BTW, this project has PIN_B3 connected to the ICD connector, pin 6 - no other use of that pin.

Cheers,
Steve