1 Reply Latest reply on Jul 13, 2012 4:35 AM by anand.srinivasan.asokan

    FX2LP Slave FIFO Mode becomes non responsive for big back to back writes

    abhey.moju

      Hi,

         

      I am using FX2LP in slave fifo mode for USB integration with the FPGA on a custom board. The USB controller works fine for small to medium transactions. If I try back to back bulk writes (each of 1M Bytes), the controller becomes non responsive. I can see the transactions being posted by the host, but the FPGA never gets any response from slave fifos. The problem suddenly disappears if I try a smaller write. Then for some time, the larger writes will work and again will run into a halt after a few write cycles.

         

       

         

      Any suggestions what's going wrong the FX2LP ?

         

       

         

       

         

      Thanks,

         

      Abhey