ssc wont hold programming

[lboucher]

Hey guys

Been fighting this one string, that somehow seems to effect other string....
Thought i fixed it by reprogrammming the pic. Then a week later i had issues again.
I did find just a bit of water, but not on the actual board.
Dried it out, now i can succesfully program it, but when i go to run it doesnt work, then i go back to verify the pic programming and it fails. Have done this a couple times in a row, so its like something is scrambling the programming. Unfortunately at the moment i dont have an extre chip.

Anybody else had this issue?

[chrisatpsu]

i have two, that got shorted out.

I went to verify the chip, and it show the same check sum as an unprogrammed pic. so i programmed it again, and no go.

it did have firmware on it, as i was using it as a test ssc, until i came across one that was wired wrong.

i haven't checked yet on what was wrong.

[fyb2000]

If you reprogram the pic with the firmware, then setup the SSC with starting channel, grouping and so forth with the SSC utility, the checksum of the program of the pic will be different and it will fail a verify against a 'blank' firmware. That doesn't mean that the PIC firmware is bad (but that doesn't guarantee it is good either). If the failure happens kind of in the middle of the verification process, not right right away, and the SSC had been set with a start channel different than 1, less nodes than 128, or/and any other options that are not the default ones, there is a good chance that this is what you are seeing.

[chrisatpsu]

no, i meant it had the same check sum as a brand new pic without any firmware on it...  (i think it's like 795A, or something similar)

[fyb2000]

ooops, my reply was meant to the OP.
A brand new pic should be only 0xFF values in there. Checksum would not matter much.