TSE and scatter-gather dma problem

The issue was very simple:

alt_avalon_sgdma_construct_mem_to_stream_desc(

&sourceDesc[0], // descriptor I want to work with

&nextSourceDesc[0], // pointer to "next"

(alt_u32 *)ActualData, // starting read address

(length), //# bytes

0, // don't read from constant address

1, // generate sop

1, // generate endofpacket signal

0);

Parameter 5 should be 0 (zero) - don't read from constant address. Now all eth packets are transmitted correctly.

So, thanks, everyone, for clarifications and suggestions.

As actually I need to receive raw ethernet frames, I'll try to modificate the project for such a purpose.