In Circuit Debugging stops working?

[Ramius]

Hi All!
You guys are very correct and I do have the MAX232 and with the 16F628A ICD works fine now with a 20 Mhz resonator. What I did not know is that it is necessary to look at the .info file for a given PIC to know what the default(s) are. Turns out that with a 16F628A the default OSC setting is XT. In the beginning of the .info file are 3 config statements that you need to copy and paste into your code to change the XT to HS. Then everything will work fine! There is one PIC I can never seem to run in ICD mode and that is a 18F1320. I know this device uses different pins for TX and RX and checking the .info the default OSC setting is 20 Mhz. Any change someone has known good working code I could use just to do some further checking? Thanks, Ed

[Ramius]

Hi All! Turns out that the 18F1320 is a "unique" PIC requiring special handling. First the following lines are required for it to operate at 20 Mhz:
#CONFIG
__CONFIG _CONFIG1H, _HS_OSC_1H
__CONFIG _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
__CONFIG _CONFIG4L, _LVP_OFF_4L
#ENDCONFIG

Next a very wonderful person Dannel Taylor sent me the attached file for the ICD to work. As part of the "trouble shooting" process I discovered that if you jumper the TX and RX out of the MAX232 that goes to the PIC in MicroCode Studioss you can open VIEW, Serial Communicator, then "connect" and type something and if your computer is talking to the MAX232 then it will echo back what you typed! If it does not then you can check that your computer comm port settings are correct and that the MAX232 is working. It's nice to have the warm and fuzzy feelings knowing at least how far things are working! Hope this helps others.

Best, Ed

[mackrackit]

Sorry to tell you but there is nothing special or unique about it.
The configs posted are typical.

But , Good job figuring it all out.