10 Replies Latest reply on Jun 25, 2018 7:08 AM by hman

    FIFO Write problem with 128,256,512... words

    ricky.thomson_2593216

      Hi All,

       

      I'm running my FX3 chip in conjunction with a cyclone FPGA, using the SlaveFIFO firmware. When i try and use the BulkOutEndPt.Xferdata to write data to my FPGA it seems to work fine most of the time. However if the number of words written is specified as 128,256,512,1024... ect then the DMA flag to begin my FPGA FIFO state machine, doesn't trigger. Its also worth noting that, if i then proceed to do a read, the 512 (or other specified length) write will happen then the DMA flag is triggered.

       

      Cheers