TSE, Verilog. MAC/PHY not sending (ARP) packets but PHY's TX led blinks?? SOS!!!

Hello,

I am trying to implement a net loopback with Altera TSE MAC.

I found in your reply that you followed a code from github website

https://github.com/posedge/sandbox/blob/master/src/net_loopback.v

but the above link is not working

So can you please post the code for me

It will be a great help

Regards

Arun

--- Quote Start ---

Sirs,

I was slowly "smoking" the TSE user manual, a book on Verilog, some examples... and was writing some silly stuff to wrap my head around all of that. So I have managed to hookup TSE MAC with Marvel PHY (Arria II GX 6G), assign (some) timing constraints, implement double-data buffer to drive RGMII TX CLK and MAC's tx clock, perform a minimal TSE initialization sequence, get and process incoming ethernet packets. All looked good.

So my next step was to actually at least reply to ARP requests (who has IP?). I have hard-coded my MAC address, IP address etc. Wrote the code to send ARP reply, and do a lot of checks meanwhile. Everything looks OK from code perspective, all "debug" checks pass.. PHY's TX LED is blinking. But I get no data on the host - my PC connected directly to the board.

I have tried a lot of things but cannot get it working. I have a feeling that either PHY is sending some crap over the cable and my host (Linux) driver simply drops the signal or I don't know.. I am raging.

Unfortunately (for all of us) I am no good (yet) with debugging things (using Signal Trap etc)...

Here is my code:

network.v (https://github.com/posedge/sandbox/blob/master/src/network.v) - a guy that handles incoming data from TSE and partially parses things.

network_arp.v (https://github.com/posedge/sandbox/blob/master/src/network_arp.v) - a guy that is trying to reply to ARP packets to the point when PHY TX blinks, but no data appears on the other end.

To trace data, I use tcpdump and wireshark. I thought that maybe box is dropping things (eth is in promiscuous mode), but I don't know if there is a way in Linux to trace ethernet signals (probably no?).

Of course, you can also navigate through other sources, from here - https://github.com/posedge/sandbox

(https://github.com/posedge/sandbox)

I must be doing something wrong but I cannot figure out what..

Any hints, help is greatly appreciated.

Thanks!

--- Quote End ---