NUCLEO-F767ZI dead Ethernet, no active line LED's :: SOLVED

[Joerg Wagner]

Hello.

I cannot use Ethernet with my 2 weeks old NUCLEO-F767ZI (chip version Z).

Probably the LAN8742A does not work properly anymore.

After initilization I perform a check:

if (HAL_ETH_ReadPHYRegister(&heth, PHY_BSR, &regvalue)==HAL_OK) {
  if (regvalue&0x04) {
     // cable connected, but with this board never reached
    ...
  }
}

No LED of the connector is active.

The software works on other boards. (Latest FW, etc.)

Is there a chance to rescue the board?

Thank you Joerg

[Piranha]

That is not a correct locally administered MAC address. As a minimum, the first byte must be 0x02. If that's the case, then the rest of the bits, except for multicast bit, can be whatever you want and the address is guaranteed to not interfere with universally administered addresses.

[Piranha]

If the PHY LEDs are not stable with empty mass erased MCU, then it really is a hardware problem. It could be anything in the environment - power supply, ESD, vibration, temperature, humidity, dust, people...

For macOS MacTerm looks good, but I've not used it.

Also take a note of this.