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Honored Contributor
Honored ContributorSG-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_ForumHonored Contributor
Honored ContributorAdditional info from my question:
descriptor(0) current_descriptor : descriptor[0] next_descriptor : descriptor[1] descriptor(1) current_descriptor : descriptor[1] next_descriptor : descriptor[2] descriptor(2) current_descriptor : descriptor[2] next_descriptor : descriptor[2] *if I create descriptor above, the data keep looping sending descriptor(2), *if I change next_descriptor(2) like below to get a loop, descriptor(2) current_descriptor : descriptor[2] next_descriptor : descriptor[0] *this one will cause the sgdma stop sending continuous data stream. :confused:
