Alberto Fahrenkrog

STM32F769DISCO + LwIP + CubeMX 4.22

Discussion created by Alberto Fahrenkrog on Jul 21, 2017
Latest reply on Sep 8, 2017 by edison

Hi all,

 

I've had this issue all day where I could not get absolutely anything from the discovery board's MAC, starting a very simple project using LwIP and CubeMX4.22

 

First of all, after lots of reading, it seems that CubeMX 4.22 still generates the PHY address value as 1 if "PHY" is configured as "LAN8742_PHY_ADDRESS".

 

There's two workarounds at the moment:

1) On "ethernetif.c" add the following lines

 

 

  /* USER CODE BEGIN MACADDRESS */
  /* This overrides the physical address */
  heth.Init.PhyAddress = 0;
  /* USER CODE END MACADDRESS */

 

2) On the ETH Configuration window -> Advanced Parameters

set "PHY" to "user PHY"

rename it to LAN_8742A (for some reason the PHY Address Vaulue 0 cannot be changed)

Under "User Constants" add

LAN_8742A_PHY_ADDRESS  and value "0"

 

Regenerate your code. Call your "MX_LWIP_Process()" function inside the main loop, inside the user code section. That should get you the ethernet interface up and running.

 

I haven't tried any apps yet, but at least the PING command from a PC works.

 

Hope that helps someone.

 

Cheers

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