Getting Slow Frame Rate using Frame Buffer Driver on Cyclone IV Board

Hi,

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Yes. I am getting Proper Image but getting video as slow compare to its actual time for high resolution supported video like 720P.

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It seems that the data transfer from DDR2 to VGA master module via FIFO buffer is working well. But its maximum peak data transfer rate reaches 75MHz x 8byte = 600MByte/sec. Whereas, the DDR2 <-> FPGA peak rate is 125MHz x 2 x 8byte lane ? = 2GByte/sec, You have the room 2Gbyte - 0.6Gbyte = 1.2Gbyte, but this is a theoretical rate. So I recommend you that once check the data transfer between your PCIe and DDR2, by using Signal TapII, etc.

Kazu