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garbage on screen

shenlung
2015-03-18
2015-03-21
  • shenlung

    shenlung - 2015-03-18

    Good day, I'm trying out but all im getting is garbage, like a machine with bad prom. do u know what the checksum should be of the 16bit image uploaded to DE1 sram.

     
    • darfpga

      darfpga - 2015-03-21

      Hello,

      First check that the sram is actually well loaded.
      - write data to sram with the de1 control panel
      - read the sram data back to a file with the de1 control panel
      - compare the new file with the original file.

      Ah! one VERY important thing : DO NOT POWER OFF de1 board between loading the sram with the data and programing the bagman.sof file. Otherwise the sram data are LOST!

      What method are using to load the program ? do you use the SOF file or recompile from source ?

      Let me know about progress.
      Bye.

       

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