Device being ID'd incorrectly while trying to program

[RatFink]

I'm trying to program a PIC16F877A using the method shown here by Woody;



http://www.ccsinfo.com/forum/viewtopic.php?t=19231&highlight=rb3

but it says it can't detect the chip when I try using the Debugger (ICD-40) and if I try to just download the program to the chip it says it's an unknown PIC18 device.

Any ideas what might be wrong?

OH, one thing is that where Woody refers to an orange wire, the 6 line I got has a white wire.

[RatFink]

Nobody has any ideas?

[hillcraft]

I use the ICD-U all the time without any problems. I program 16F876, 877, 18F458 etc.

Things to look out for:
--------------------------

The ICD itself
----------------
1. Start up the ICD app itself and test the ICD. The test will show if the ICD itself is working and if the ICD firmware is up to date.
2. If the firmware is not up to date, allow the ICD to update its own firmware.

Your board
-------------
1. Pins on the target ICD socket:
-----------------------------------
6 - B3 - Optional for debugging
5 - B6 on target PIC
4 - B7 on target PIC
3 - Ground
2 - +5V from target to ICD
1 - MCLR - Connect to target PIC and pull up to +5V ith 47K resistor

2. Avoid connecting B6, B7 to other components on the target board.
3. You do not need to connect B3

In the IDE
-----------
1. Ensure that your app has the appropriate device header file - if the header file is specified for a 18F458 and you are sending the app to a 16F877A, the the ICD will tell you that it cannot find the appropriate chip.
2. If the ICD cannot detect any chip at all then the chip is not powered, or the ICD is connected incorrectly.

Your specific problem
-------------------------
It seems to me like you have got the wrong header file selected in your code or, you are inadvertently selecting the inappropriate compiler (meant for 18F) and your program has a directive that allows it to compile corectly.

Look for these directives:

# ifdef __PCM__
or
# ifdef __PCH__

...to prove whether the program can compile 16F or 18F parts.

[RatFink]

I will check all of that;

More info;

My ICD works fine with my the board that came in my CCS Programing kit, which also has the PIC16F877A chip, in fact I'm using it right now, and the firmware as been updated to current.

Also I've double checked all my connections from the ICD according to the Excercise book "Migrating to your own hardware"

But I will double check all that you mentioned.

Thanx

[hillcraft]

The diective __PCM__ will include the code is within the directives #defines if the PCH (16**) compiler is used.

#ifdef __PCM__
..
...
..
..#endif


The diective __PCH__ will include the code is within the directives #defines if the PCH (18**) compiler is used.

#ifdef __PCH__
..
...
..
..#endif