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Altera_Forum's avatar
Altera_Forum
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15 years ago

Scatter-gather DMA for tse

Hi everyone, I looked into reference designs about tse(triple-speed ethernet), and I found that all these tse applications are built around NIOSII with scatter-gather DMAs. My question is...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

If you put the TSE into 32-bit mode and connected the ST interfaces to FIFOs that support MM on one side and ST on the other you could manage the traffic using software. It'll be dog slow since the CPU will be directly in the data path. This would also require changes to the code which assumes there are SGDMAs moving the data around.