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Altera_Forum's avatar
Altera_Forum
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16 years ago

Issue using SGDMA to frame buffer

Hi, I am buffering frames using an SGDMA. I was wondering if anyone has come across the following problem: After transferring successfully to the ddr2 with several descriptors, the ready...
Altera_Forum's avatar
Altera_Forum
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16 years ago

I could see the SGDMA having problems with small frames where the transfers outrun the descriptor. If you want a much easy way to do this check this out: http://www.nioswiki.com/exampledesigns/modular_sgdma_video_frame_buffer

I had frame buffering in mind when I designed that SGDMA so I made it dirt simple to use for video application. The example above is based on this design example: http://www.altera.com/support/examples/nios2/exm-modular-scatter-gather-dma.html