hi, i have a custom board using 5777c/5775e with TJA1100 running in autonomous mode with MII-Lite configured on the mpc side.
I was able to send and recieve packets one time upon power up but further sends would not show up on the TX lines (scope) or PC end (wireshark). the receiver is interrupt driven so it hits once then no more packet is detected.
i've disabled the D-cache as some suggested but the same results.
the argument is that if the send/receive works one time then the hardware and phy chip should be ok. so the focus is on the driver end.
any hint is welcome.. i'm out of ideas...