2 flashing columns Peggy 2le

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  • May 12, 2013 at 7:57 pm #20229
    WakeUpWolfgang
    Participant

    I just fished soldering my Peggy 2le today. I tried different sample codes and all I get is columns Q7 and Q23 flashing all the way up to the second to the top row. Where should I start trouble shooting it?

    May 12, 2013 at 8:19 pm #21346
    Windell Oskay
    Keymaster

    First off, are you getting the same pattern exactly, regardless of the program that is being run?

    And, can you please describe a little more clearly what you are seeing?   Q7 and Q23 are the names of two transistors, which control rows 7 and 23, respectively, starting with row 0 on the top.  Is it these two rows that are showing the issue, or are you actually seeing a problem with two of the columns?   Is the rest of the board lighting, or are these the only rows/columns that are showing any light?
    May 12, 2013 at 8:35 pm #21347
    WakeUpWolfgang
    Participant

    Nothing is lighting up but columns 7 and 23 and nothing is lighting up in the top 2 most rows. What is lighting up is flashing and each led seems to be at different brightness’s. It is the same no matter what sketch I use.

    May 12, 2013 at 8:45 pm #21348
    WakeUpWolfgang
    Participant

    Here is a video I just made of it. http://www.youtube.com/watch?v=124ZP7HxmN4 

    May 12, 2013 at 9:03 pm #21349
    Windell Oskay
    Keymaster

    It looks like you might have wire jumpers in both the P2 and SER slots– is that correct?  If so, please fix that first and see how the rest is behaving.

    May 12, 2013 at 9:10 pm #21350
    WakeUpWolfgang
    Participant

    Yes there was I thought I was missing some jumpers. I cut SER so I have P2 with the jumpers. I have the same results.

    May 12, 2013 at 9:30 pm #21351
    WakeUpWolfgang
    Participant

    I was messing with the ardunio SDK and when I try uploading something to the board I get.

    “avrdude: stk500_getsync(): not in sync: resp=0x00”
    May 12, 2013 at 9:41 pm #21352
    Windell Oskay
    Keymaster

    The programming error would suggest that the board is resetting, possibly due to an overcurrent event when it’s lighting up the LEDs like that.  

    Previously, you said that you were able to program it.  If it can’t be programmed, the “CPU” is probably also not in a state where it can correctly light the LED display. You should reload the peggy2_minimal sketch to have a known-good state before going further.  If necessary, gently remove the LED driver chips (U2, U3) so that it will not drive the LED display, so that you can reprogram it.
    May 12, 2013 at 10:08 pm #21353
    WakeUpWolfgang
    Participant

    I pulled U2 and U3 I get the same thing when trying to upload the peggy2_minimal sketch. Maybe I never could upload a sketch and just did not look at the output.

    May 12, 2013 at 10:18 pm #21354
    WakeUpWolfgang
    Participant

    I just pulled the Atmega328p-pu with another Atmega328p-pu That I have that I knows works and tried uploading peggy2_minimal and I get the same result.

    May 12, 2013 at 10:31 pm #21355
    Windell Oskay
    Keymaster

    By, “the same result,” do you mean that it still can’t be programmed?

    May 12, 2013 at 10:38 pm #21356
    WakeUpWolfgang
    Participant

    Cant be programmed and the LEDs are doing the same thing.

    May 12, 2013 at 11:19 pm #21357
    Windell Oskay
    Keymaster

    Right now, we need to figure out what’s preventing programming, because this is a much more fundamental problem than the one with the LEDs. 

    Again, I would suggest that you actually remove U2 and U3 while debugging this– and do not put them back in –until you are sure that you can get the microcontroller to work normally.    
    Using both sets of jumpers like you did could potentially damage the microcontroller, but that shouldn’t be an issue since you’ve got the extra chip to try.  Are you sure that the extra has the same Arduino bootloader on it?
    May 13, 2013 at 7:05 pm #21358
    WakeUpWolfgang
    Participant

    The other one I used has the bootloader that comes with the Arduino Uno 

    May 13, 2013 at 7:18 pm #21359
    Windell Oskay
    Keymaster

    The bootloader from the UNO is not strictly compatible with the one on the Duemilanove (and Peggy 2 default), although I *believe* that it can work if you select UNO as your board type.  Not entirely sure.

    This is starting to get a little more complicated; Do you want to send your Peggy 2LE back to us for diagnosis?
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