1 Reply Latest reply on Dec 18, 2015 1:19 AM by Madhu Lakshmipathy

    FX3 - data transfer stop phenomenon to PC

    kimjh_1530201

      In my custom design. A FPGA transfers video stream data though gpif port and  a FX3 chip transfers it to PC .

         

      But PC doesn't get data continuously , data read stops at 4~8 times transfer for  8192 byte data. (burst mode).

         

      In stop state, DMA Full flags are all full .  If  try data read again , it also stops at at 4~8 times transfer again.

         

      in pc side ,  5ms Sleep Function between transfers  disappears the stop situation ( data loss ).

         

      in pc side , I use XferData( buf , 8192)  repeatly . 

         

      in FX , gpif sync_slave_fifo_2bit ,  Multi-channel Dma auto mode  using thread 0 and 1.