Does anyone have a recent TCP/IP project for a NUCLEO-H755ZI-Q generated by Cube MX 2.0?

[JohannesWilde]

Good evening,

I have been trying to get the ethernet port of my NUCLEO-H755ZI-Q to talk to my PC - and have been failing to do so now for a week.

I found this manual, but it is for Cube IDE 1.9 - and even after following the described steps I fail to talk via ethernet.

I did also find this github repo where I used STM32H7-LwIP-Examples/STM32H745_Nucleo_M7_ETH - and after adapting the IPs somewhat communication via UDP did work.

So I am rather sure my hardware does work.

But the code generated by CubeMX 2.0 does not.

Can anyone provide me with either

• a short manual how to configure CubeMX correctly,
• a ready-made example project using the current CubeMX 2.0,
• or any other input?

The current problem with my CubeMX 2.0 generated project is that during reception I get an 

ETH_DMACSR_RBU /* Receive Buffer Unavailable */

inside the

HAL_ETH_ErrorCallback

 En- or disabling ICache, DCache and MPU did not have any effect. I did move the RX_POOL to 0x30040000 as per the article and adapted the linker script. All to no avail.

 Any help will be appreciated.

Thanks in advance

Johannes

[MStackDev_376]

Hi Johannes,

You can take a look at this example, which uses the Mongoose Networking Library. It's a lightweight networking library, ideal for embedded devices and it has support for a wide variety of networking protocols, including UDP.

The project implements a simple web server that features an UI dashboard. It should serve as a good starting point for any networking functionality you might want to add, including UDP.

A key difference in this project is that it uses Mongoose's own built-in TCP/IP stack and Ethernet drivers along with the Mongoose API (documented here), and does not rely on the standard ST HAL networking and Ethernet drivers and API.

Heads up: I am part of the Mongoose development team, hope this helps you.

[JohannesWilde]

Thanks for the pointer - but currently I am not able to acquire a commercial license. Thus Mongoose is not a viable solution for me.

[MStackDev_376]

Thanks for the reply!

My main goal was offering a fully working solution, including the hardware configuration, that you can use to compare against your project. The STM32H7 Ethernet peripheral is a bit tricky to get right, especially with D-Cache causing conflicts with Ethernet TX/RX or the ETH buffer pools not being placed in a DMA-accessible memory region, similar to what you mentioned you tried to change. We experienced these issues as well.

Often, the issue could be in the clock tree or pin manager. The .ioc file in the example project is a good reference you can use to compare your own .ioc file, in case there is a misconfiguration in the hardware setup. Other than that, the `Receive Buffer Unavailable` issue could indicate the RX buffers are not being read by the low-level driver, so an issue might be there, such as the interrupt not being triggered on RX. So, please also check the status of interrupt, if it's activated or not.

Best of luck with the project.

[STackPointer64]

Hello @JohannesWilde,

Please find attached a newly created project that you can modify to suit your needs.

Best regards,

[JohannesWilde]

Hi @STackPointer64 ,

thanks - but the website keeps telling me that "(Virus scan in progress ...)". Could you give me an estimate as to when I can download the zip? Or could you upload the project to github and send me a link?

Beste regards

Johannes

[STackPointer64]

Hello @JohannesWilde,

It seems there is an issue with the community website. I have sent the demo to the email associated with your account via ST’s secure file transfer service.

Best regards,

[mcayir]

Hello, ca you please re-attach the example project. I have similiar issues

[JohannesWilde]

Hi mcayir,

I adapted the project to use a static IP [192.168.1.6], tested a ping successfully and uploaded the project  here.

@STackPointer64 could you tell me whether special licensing applies to this example? Otherwise I would chose MIT.

Best regards

Johannes

[STackPointer64]

Hello,

Thank you for asking. Here it is:

Component	Copyright	License
CMSIS	ARM Limited	Apache License 2.0
CMSIS Device	ARM Limited - STMicroelectronics	Apache License 2.0
STM32H7 HAL	STMicroelectronics	BSD-3-Clause
LwIP	Swedish Institute of Computer Science	BSD-3-Clause
FreeRTOS kernel	Amazon.com, Inc. or its affiliates	MIT
BSP Components	STMicroelectronics	BSD-3-Clause
STM32 Projects	STMicroelectronics	SLA0044 (BSD-3-Clause for basic Examples)

Best regards,