STM32H7 LwIp Ethernet

[Michael Siekiera]

Posted on July 03, 2018 at 17:08

Hi everyone,

I am new to programming Ethernet applications and wanted to start with just sending Ethernet frames with my stm32H7 Nucleo Board. The only Middleware I use is LwIP.

My problem is, that the programm itself is running, but i can not see any frames from my nucleo board with Wireshark.

Rigth now when I am trying to send a Ethernet frame with ethernet_output(), the first line

struct eth_hdr* ethhdr;

seems to fail to create the struct ethhd with following Message:

===============================================

Multiple errors reported.

1) Failed to execute MI command:

-var-create - * ethhdrError message from debugger back end:value has been optimized out

2) Unable to create variable object

3) Failed to execute MI command:

-var-create - * ethhdrError message from debugger back end:value has been optimized out

===============================================

My main methode looks basically like this

(note: the MACAddrDest was not 0x00 during my testing).

Does anyone know, where my Problem could be?

Would appreciate any help i could get.

Best regards

PS. I also attached my whole project, if someone wants to look in.

#stm32h7-ethernet

[Amel NASRI]

Posted on July 03, 2018 at 18:15

Hi

Siekiera.Michael

,

Could you please start with a working example like the one mentioned in 

 ?

For your project generated with CubeMX, try to follow the recommendations provided in this same FAQ.

-Amel

[Michael Siekiera]

Posted on July 03, 2018 at 19:45

Hi

st.mcu

,

thank you for the quick response.

I modified my linker script and my MPU config to match the ones from the working examples, but I still get the same error.

Is there anything else I could try to do?