1 Reply Latest reply on Jun 15, 2016 5:55 AM by Madhu Lakshmipathy

    FPGA SlaveFifo problems

    wusl_1525371

      Hi,

         

         I use AN65974 to communicate FPGA with USB3014 . 

         

      GPIF parameter :

         

       sync slavefifo 、32bit、flaga is current_thread_dma_ready ,i have a counter about write data number,so i do not use flagb.

         

      SDK:

         

      buffer size = 16384bytes  ,DMA Count = 8(p to u)

         

      FPGA:

         

      I read data from FIFO(fpga),then  write data to usb3014 fifo.

         

       

         

      But I have some problems :

         

      1.when i use "USB Control Center " ,click "transfer data-in",i can receive right data without PIB ERROR.

         

      2.But when i use "C++ streamer", click "start",i will see "CYU3P_PIB_ERR_THR0_WR_OVERRUN " in UART GUI.

         

      i want to know why .