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i have a problem to erase 16F877A.I programmed the pic and worked well but i wanted to change the code.when i wanted to programe 16F877a again with EPIC software this message show :" this is not blank " and when i chose erase from menu, show "erase completely" but when i check the pic is blank or not , show " this is not blank at 0000=248B"
and i couldent program again.
pls help me.
" my english language isnt very good.excuse me if i have some mistakes in the sentences."
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same error
I am programming 100+ 16F767 and about 10% I am getting the Code programming error at 0000. Sometimes if I try several times, it will finally program successfully. Some of the pics just won't take the program and repeatedly give me this error. Does anyone know what the problem might be?
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Solution to 0000 error
Use an external power supply for the PIC.
By external I mean a separate power supply just for the PIC. Ex: 7805.
"If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
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Originally Posted by sayzer
Thank you for your input. I am a little confused though. I am programming with the serial programmer using the latest software. The pic is not "in circuit," it is in the zif socket. The programmer is being powered by the 15V power supply that was provided with the programmer.
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I don't use an EPIC so don't ask me questions about it...
However, I have on several occasions come across batches of PICs (these are factory new) that NEED to be erased prior to programming. Some PICs will program straight out of the tube, some will fail. But if an ERASE operation is performed first, they all program first time.
By default for the last year, I've preset 'Erase before Programming' and I've not had any such programming errors since.
btw... a forum SEARCH on "error 0000" brings up this topic which has been discussed several times. Perhaps there is something in an old thread which may help.
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IF you decide to bend the power pins of the PIC up in the air and apply the voltage as what I call “in space” with the help of some crocodiles, it may work.
You must make sure that you have the ground pin of PIC common with the ground of PCB board (programmer).
Whatever you do just make sure that you power the pic with a separate power supply and have the ground common.
"If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
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Thanks again guys...
The pics are all new and I do blank check before programming. I added the 1uF capacitor to the power pins (as per information on melabs.com) but it made no difference at all. This fix was for another problem, but customer support recommended that I gave it a try.
Erasing the chips first has no effect. The same chip will fail to program 10 times and then all of a sudden, it will work fine.. Very strange behavior. It seems to be related to the Pics though, not the programmer. I say that because some chips are just troublesome, and others (most) work on the first shot.
Does anyone know of a good low-cost commercial programmer that can program all of the Pics?
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EPIC is certainely one of the best lowest-cost programmer anyways.
I use Microchip PICSTART Plus and BK Precision 844a (relabeled of an Elnec)
Microchip ICD-2 seems to be another great one.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Hmmm, I hate when I feel like I'm talking to myself. LOL.
Anyway, glad it worked for you, it didn't work for me...
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