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Altera_Forum's avatar
Altera_Forum
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15 years ago

SG-DMA descriptor chain not working.

Hi everyone, I'm doing SG-DMA for streaming data to LCD. This is how I do, SG-DMA memory-to-stream SOPC connection. { descriptor read and write-->DDR-SDRAM read data -->DDR-SDRAM } ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

additional info:

DDR(150MHz) -> SG-DMA (100MHz) -> VSYNC DRIVER(100MHz)

SGDMA send 32bits,RGB converter convert it to 24 bits per 1 cycle, and the sync driver covert the 24 bits and send 8 bits for 3 times.