let me go over the basics
-using a home built JDM programmer
-has worked on 16f877, 16f6228 (so i know the hardware works)
-software: icprog and picpgm
i came across this (http://www.instructables.com/id/JDM2-based-PIC-Programmer/) which mentioned putting a 22pF cap from the PGD and PGC to ground aswell as a 100 ohm resistor in series with PGD to act as a filter. i am assuming that ground is the VSS wire. i also came across another source that said to use an external 5V supply for the VDD and VSS, tried that aswell, still nothing.
This has not worked for me, so i am at a loss and asking for help
It says it writes everything to the chip but when it tries to verify it fails every time, this happens both with my 18f2550 and the 4550.
-using a home built JDM programmer
-has worked on 16f877, 16f6228 (so i know the hardware works)
-software: icprog and picpgm
i came across this (http://www.instructables.com/id/JDM2-based-PIC-Programmer/) which mentioned putting a 22pF cap from the PGD and PGC to ground aswell as a 100 ohm resistor in series with PGD to act as a filter. i am assuming that ground is the VSS wire. i also came across another source that said to use an external 5V supply for the VDD and VSS, tried that aswell, still nothing.
This has not worked for me, so i am at a loss and asking for help
It says it writes everything to the chip but when it tries to verify it fails every time, this happens both with my 18f2550 and the 4550.