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I'm still working on it - hopefully will be on the DECstation2040 github soon. The interface uses the LAN8720/8740 MAC chips, which provide 10/100 Mbit. (I haven't tried 10 Mbit, so no idea if it works or not). FYI, here's a test result: ping -q -i 0.005 192.168.1.6 PING 192.168.1.6 (192.168.1.6) 56(84) bytes of data. 229501/229501 packets, 0% loss, min/avg/ewma/max = 0.063/76.725/88.698/160.145 ms 295393/295987 packets, 0% loss, min/avg/ewma/max = 0.063/76.792/37.003/160.171 ms 295393/296278 packets, 0% loss, min/avg/ewma/max = 0.063/76.792/37.003/160.171 ms

(Above is with killall -s QUIT ping) As you can see, it eventually hangs, and CMSIS reports: target halted due to breakpoint, current mode: Handler HardFault xPSR: 0x61000003 pc: 0x200001c4 msp: 0x20040f40



If anybody is still following this thread, I fixed the problem: sudo ping -f 192.168.1.6 -s 1473 PING 192.168.1.6 (192.168.1.6) 1473(1501) bytes of data. 347751/347752 packets, 0% loss, min/avg/ewma/max = 0.573/0.625/0.628/1.002 ms 375962/375963 packets, 0% loss, min/avg/ewma/max = 0.573/0.625/0.626/1.002 ms 45876717/45876724 packets, 0% loss, min/avg/ewma/max = 0.570/0.626/0.630/3.972 ms ..^C --- 192.168.1.6 ping statistics --- 48237616 packets transmitted, 48237608 received, 1.65846e-05% packet loss, time 31011738ms rtt min/avg/max/mdev = 0.570/0.626/3.972/0.011 ms, ipg/ewma 0.642/0.627 ms

Turns out I wasn't passing the RX data properly to LWIP...


So roughly 19 Mbps, up and down? Although I guess ping is not an optimal bandwidth test.




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