I can't seem to reprogram my pics. Some of my pics, I can program. But others, I get Verify errors and program failed... I'm only using 16F88 and 16F688 pics, some of each don't verify. Did I maybe... write/read protect the chip somehow? If so, How do I fix it?
Thanks!
Are you, by any chance, using a PicStart Plus programmer?
Negative. I'm using this guy:
The SUNROM PICEX1000 - JDM
Sorry, I don't have experience with that. I found a design weakness in the PicStart Plus that made its operation unstable in a way that sounded like what you are describing. It has a boost converter to create the program voltage, for the PIC, that contaminated the 5 volt supply with voltage spikes. In that case, replacing the storage caps before and after the converter with low ESR types got the spikes under control and all the symptoms cleared.
You might try paralleling some additional capacitance (even just across the supply pins of the chip being programmed in the ZIF socket) across your supply lines to see if the same kind of thing is works for you.
Make sure there are no errors. I know I've had similar issues and its because winpic doesn't have the proper files for those pics. It will say something about not having the proper initialization sequence or something(actually I forgot). Its in the messages tab and it says it when you try and start the write processes.
The point being even though it lets you select the pic sometimes it doesn't have the ability to program it. Not sure why.
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