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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
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13 years ago

Hello, Daixiwen.

Thank you so much for clarifications.

I tried to use uncached pointers (with 31 bit set). Now after TSE and PHY initialization complete, I read PHY mode status register, and bits "Auto-Negotiation Complete" and "Link Status" are both 1. So, PHY is configurated correctly and evidently must work.

However, I can't see any data on TSE output, and code never comes to 'tx_done = 1'.

I think that sgdma in my project is not configurated properly, or some changes are needed in software functions where I try to send data...

Is there any other simple way to test TSE sending/receiving without sgdma?

Actually I need to receive raw ethernet frames in my project, but first of all I try to send data as I think it should be easier to make it work.

I looked through some threads in altera forums, but unfortunately didn't find any thread about how to receive ethernet frames with TSE and NOT using interNiche stack and OS.