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Altera_Forum
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18 years ago

TSE MAC and Marvell 88E1111

I'm having trouble to bring up the TSE MAC to Ethernet interface on the Stratix II GX PCIe board. I was able to instantiate a triple speed Ethernet MAC and build logic around it. The loopback at the ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Is the packet size correct?

To build a descriptor, you can use the functions defined in altera_avalon_sgdma.h.

The alt_avalon_sgdma_construct_mem_to_stream_desc() can build the descriptor for you. It is well described in the SGDMA datasheet.

If it isn't a cache problem, it could be because the SGDMA isn't reading the memory at the correct address. But at least it seems to try to read 126 bytes.