12F629 Trouble


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  1. #1
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    well i heard this often, i think it's more about an IC-PROG setting rather than else. Seems he just don't program your PIC. Just make sure MCLR voltage is 'round 13Volt while programming.

    USB-to_serial adapter may work or not.

    Maybe there's better software than other for the JDM... but i stick with the idea to suggest you the Microchip PICKIT 2.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

  2. #2
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    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

  3. #3
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    Something to try ...

    Try erasing the PIC before attempting to reprogram it
    Paul Borgmeier
    Salt Lake City, UT
    USA
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    This is a fairly common issue with 12FXXX and the JDM combo, specially if you have configured the pic for internal oscillator *and* mclr_off. If you have, the only way to reclaim the chip is to erase it in another (USB or parallel port based) programmer that can independantly control the sequence of switching on the +5 and +12 volts while programming.

    There are variants of the JDM people have designed to take care of this problem using a little extra circuitry. I could give you the URL, but I'd honestly advise you to switch over to something more robust.

    Regards,

    Anand

  5. #5
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    While development kit and device programmer are now cheaper than they were before, i hope and i really think all of theses JDM and all other freebies will die.

    PICKIT 2 is probably the best to begin. ~40$, and support most popular PICs. Actual supported device list can be found bellow
    http://www.microchip.com/stellent/id...cName=en027813

    Pretty bad MPLAB support, but nothing is perfect.

    40 bucks for and hassle free programmer, it's nothing.

    I no longer suggest Picstart, but ICD-2 or any Elnec (BK precision) programmer are really nice, support too.
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

  6. #6
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    Quote Originally Posted by mister_e View Post
    Pretty bad MPLAB support, but nothing is perfect.
    What do you mean by that? I haven't found anything that the PICKit2 and MPLAB, at least nothing worth mentioning...
    Got any specifics that I might be missing?

  7. #7
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    Yeah... maybe you need to have your eyes open and read carefully the MPLAB supported list link i'd posted, i'll help you a little bit
    PICkit 2 MPLAB 7.51 & 7.52 Support

    Debugging & Programming

    * PIC12F683*
    * PIC16F684*, 685*, 687*, 688*, 689*, 690*
    * PIC16F883, 884, 886, 887
    * PIC16F913, 914, 916, 917, 946

    * These devices require an ICD header board to enable debugging with them.

    Programming only

    * PIC12F508, 509, 510
    * PIC12F675
    * PIC16F505, 506


    now compare it to the PICKIT 2 standalone utility supported list... MPLAB one is nothing... But it allow ICD, while the standalone don't
    Steve

    It's not a bug, it's a random feature.
    There's no problem, only learning opportunities.

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