FX3 - data transfer stop phenomenon to PC | Cypress Semiconductor
FX3 - data transfer stop phenomenon to PC
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.