Since your only tool for testing the PIC is your programmer and the PIC isn't talking then get another PIC. You can't use a typical test gear to test the PIC and I'm sure the cost of another programmer is higher than a replacement PIC.
Since your only tool for testing the PIC is your programmer and the PIC isn't talking then get another PIC. You can't use a typical test gear to test the PIC and I'm sure the cost of another programmer is higher than a replacement PIC.
Thanks for your reply blueroomelectronics, i'm sure i've already seen a little test circuit for PICs but can't find it anymore.
It was a few resistors circuit that connects some of PIC pins and by measuring the voltage across 2 pins of the PIC you can tell if it's still responding or not. . .
Thanks for your reply blueroomelectronics, i'm sure i've already seen a little test circuit for PICs but can't find it anymore.
It was a few resistors circuit that connects some of PIC pins and by measuring the voltage across 2 pins of the PIC you can tell if it's still responding or not. . .
Highly doubtful, how a couple of resistors and a meter could tell you anything about the goings on inside a PIC is silly.
But if you think that's possible ask over at the Microchip forums.
If the pic is old I think already contains some program try to supply and connect different oscillators (RC and xtal) pull up the MCLR pin and see if there is oscillation, if does probably its fine. Or try to build a simple programmer like jdm in a protoboard, Unless you get another pic or other programmer that is the only thing I think you can do.
Strongly recommend checking the following staff:
1. Crystal design circuit, make sure the oscillate starts, and working properly
2. Check the WDT setting on your software and hardware configuration.
3. Check the Brown out reset; make sure it is properly set.