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Altera_Forum
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14 years ago

use descriptor chain in SGDMA

Hi all My current goal is to use SGDMA (ST-to-MM) to transfer video data to a memory. Later on, I'll replace the memory by PCIE IP. My problem is how to use descriptor chain in SGDMA. ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

You need to make sure the data read/written by the nios isn't just coming from the data cache.

For the descriptors it may be easiest to dual port the internal memory to a tightly-coupled data port (from the nios) and the Avalon bus (for everythig else.