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Altera_Forum's avatar
Altera_Forum
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14 years ago

TSE and scatter-gather dma problem

hi, everyone I am recently trying to connect nios II to computor through ethernet , I separately connected a memory to stream scatter gather DMA to TSE's transmit and a stream to memory scatter g...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Transmit should always work. CHeck with signal tap both the avalon stream interface and the PHY side signals, to check where the transfer is stopped.

For reception you should configure the MAC with a MAC address, or set it in promiscuous mode, or most of the packets will be filtered and never transmitted to the DMA.

You should also check if the PHY needs any initialization.

Is there any reason why you don't use an OS with a tcp/ip stack?