LWIP with STM32F769

[Rick MC]

Posted on May 21, 2018 at 17:07

I want to use the ETH port to communicate with other devices. I started by creating a project in CubeMX for the STM2F769I-Disc board. 

I simply added the LWIP and the ETH port (as RMII) and set a specific IP address (which was not already taken by any other device, my pc included). 

I'm using IAR to comile the project and everything is fine: I also added in the while(1) the function MX_LWIP_Process();

My problem is that I don't reach the board at its specific address when I ping it.

Where am I going wrong?

Thank you!

#stm32f7 #lwip #eth

[Rick MC]

Posted on May 22, 2018 at 08:58

In particular the code returns an error in function HAL_ETH_GetReceivedFrame since the following if statement is not verified:

/* Check if segment is not owned by DMA */

if(((heth->RxDesc->Status & ETH_DMARXDESC_OWN) == (uint32_t)RESET))

What is this statement doing? When is its condition true?

[john doe]

Posted on May 23, 2018 at 01:59

Make sure you set the PHY address to 0.  STM32CubeMX application STILL wants to set it to 1.  Come on, ST,  how many years do we have to wait?

[Imen.D]

Posted on May 23, 2018 at 12:45

Hello,

The

PHY 

address name issue is already fixed in the

STM32CubeMx 

4.19 release: You can change the PHY address value in ETH configuration, then go to the 'Parameter Settings' tab.

With Regards,

Imen

[john doe]

Posted on May 23, 2018 at 13:37

It is NOT fixed in 4.25.1. PHY defaults to 1 - see attached images

[Rick MC]

Posted on May 23, 2018 at 13:39

Thanks for your advice about the PHY parameter! It must have been that. Now it works well!

[iw2lsi]

As far I can see, initially CubeMX starts with the correct PHY address of 0... but then if you (for example) disable and re-enable the ETH device, it changes the PHY address from 0 to 1

We are spending so much time on this stupid CubeMX behaviours...