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Konrad's avatar
Konrad
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5 years ago

Tripple Speed Ethernet (tse) Avalon-ST interface format

I am using the tse in small mac mode for a fixed 100M only connection. The project is in Quartus 16. I am a bit confused as to how the avalon-ST interface works. I have read the avalon-ST user gui...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

ok, great.


You found another method to workaround the issue. Does it help to resolve your issue ?


Regards,

dlim


Konrad's avatar
Konrad
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5 years ago

I still am confused.

To send 64 bytes using 32bit words for example, I send 1 word with SOP, followed by 62 words in line with the rising clock followed by 1 word with EOP. This is what I think is inline with the user guide.

But, the TSE Megawizard in Qsys shows an example picture when you click on the interface with 1 word with SOP followed imediately with another word with EOP to send 2 words (an 8-byte packet), followed by another 8-byte packet.

My question is therfore, do I send the whole Ethernet packet as 1 Stream Packet (which is what I am doing) or should I send the Ethernet packet as multiple Stream Packets?

I have started testing this out and I get jumbled data out, bytes and nibbles in the wrong place/wrong order. The output is always consistent to what I put in, (i.e. I change the send data and the output changes) but is corrupt.

I shall post the Avalon-ST output traces I am using generated by Model Sim.

I have simulated my own vhdl files, but I have never simulated built in IP. This I suppose will be my next step,

regards

Konrad