PIC16f877A first 8 bytes destroyed after closing PicKit2 programmer app....

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  1. - 9th February 2010, 06:42 #1
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    Hmm, I just put a chip on the breadboard, hooked up an LED, a resonator and the appropriate wires to the PICKIT2 and programmed it in place with the code posted, and it works. I actually used an 16F876A, so you MAY have more to do for a 877A.
    The PICKIT2 (at least mine ) can be a little temperamental sometimes, and tries to code protect the chip, a trick I found is to select another chip, then select the correct chip, then without loading a file, click the write button, then program in the file.
    Last edited by Archangel; - 9th February 2010 at 06:48.
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  2. - 9th February 2010, 07:05 #2
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    i re-edit the message some minutes ago , so you may not see it.

    At this time seems that PIC programmed ok
    , but leaving it in socket while opening the app destroys the 8 bytes.

    I dont have 876A

    going to work now to test another pickit2 programmer....
    Have a nice day!
  3. - 9th February 2010, 08:13 #3
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    Now at work ,
    another pc , another pickit2 (hardware) programmer same symptom !
    (pickit app same version , 2.61 , and OS 2.32.00)
  4. - 9th February 2010, 08:40 #4
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    Finally is pickit's app bug.

    Just installed pickit 2.01 with the according firmware and all ok!!

    (next up is to see in which version introduced this bug , i will post as soon as i have results...

    result: PICKIT 2.40 is the latest working ok.
    Last edited by LakisFM1; - 9th February 2010 at 08:49.
  5. - 9th February 2010, 11:42 #5
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    Quote Originally Posted by LakisFM1 View Post
    Finally is pickit's app bug.
    I doubt that...
    ps....
    Found a strange solution...I program the PIC , i remove PIC from the socket , Close App , then Re-open App , Insert PIC in socket , Read PIC and data is now OK.
    Seems that something destroys the 8 bytes while closing or opening the PICKIT2 programer software..
    The PICkit2 does not have a socket. How do you have it connected?
    Dave
    Always wear safety glasses while programming.
  6. - 9th February 2010, 12:44 #6
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    with a small 40pin ICsocket > 6pin breadboard...

    I retried second time to use 2.55 still not working, so back to 2.40 for sure.

    I suspect is a bug of the Firmware 2.32.00 used both in 2.61 and 2.55.
  7. - 11th February 2010, 21:32 #7
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    I had the similar problem with PICkit 2 and 16F88. When PICkit 2's software was re-opened, a READ operation would erase some or all of the programming. The problem went away when I used chose Manual Device Select instead of automatic select. SW v2.61.
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