STM32H7 PTP NETXDUO

[FB__1]

Hello,

I would like to know if this PTP client example from Netxduo can be used on an STM32H723 MCU: 

https://github.com/eclipse-threadx/rtos-docs/blob/main/rtos-docs/netx-duo/netx-duo-ptp-client/chapter1.md

Another MCU, the STM32N6 has this implementation here: https://github.com/STMicroelectronics/STM32CubeN6/tree/main/Projects/NUCLEO-N657X0-Q/Applications/NetXDuo/Nx_PTP_Client

I wanted to confirm if the STM32H723 does support that example because i am looking at https://github.com/STMicroelectronics/x-cube-azrtos-h7/tree/main/Projects and I cannot find any ...

Thank you.

[STackPointer64]

Hello @FB__1, and welcome to ST Community,

Currently, the only available PTP example is, as you mentioned, for the STM32N6. Regarding your question about STM32H723 support, I cannot confirm it will work immediately. However, since the STM32H723 does support PTP, with some adjustments, you should be able to adapt the example to run on that MCU. Additionally, I recommend searching the community for other threads on the same topic.

Best regards,

[FB__1]

As another option, will Zephyr RTOS on the STM32H723 work out of the box for the PTP example ?

https://docs.zephyrproject.org/latest/boards/st/nucleo_h723zg/doc/index.html

Thank you.

[Pavel A.]

It looks like Zephyr supports PTP on STM32. You're welcome to try it.

https://github.com/zephyrproject-rtos/zephyr/blob/bfd2ac78ad50dfa7391b122a410ea314b6e35a91/drivers/ethernet/Kconfig.stm32_hal#L85

[FB__1]

@STackPointer64 

"STM32H723 does support PTP, with some adjustments"

I am able to successfully run the PTP on the STM32N6 with NETXDUO (https://github.com/STMicroelectronics/STM32CubeN6/tree/main/Projects/NUCLEO-N657X0-Q/Applications/NetXDuo/Nx_PTP_Client)/

I would like to use the NETXDUO with the STM32H7, can you point me to those adjustments for the H7 ?

Thanks.

[STackPointer64]

Hello @FB__1 ,

The adjustments typically involve porting hardware-specific configurations, such as clock settings for PTP, Ethernet peripheral pinout configuration, and adapting the NetXDuo middleware to the STM32H7. I recommend reviewing the STM32H7 reference manual along with the NetXDuo PTP guide for detailed information.

Best regards,

[LCE]

Interesting!

@STackPointer64 , could you please show us where to find the following:

- STM32 ETH PTP setup (including HW offload if used)

- PTP register writing (clock update, addend change)

@FB__1 

- Do you use PTP via UDP or "pure" Ethernet? If Ethernet, does it use HW offload?

- How is PTP sync quality?

- How is sync quality if ethernet traffic goes up?

[STackPointer64 · Accepted solution]

Hello @LCE,
The STM32 ETH PTP setup can be found in the MX_ETH_Init(...) function. Inside, you will find a PTP struct declaration used to configure the feature, followed by a call to ETH_PTP_SetConfig(...) to apply the configuration to the appropriate registers. For clock updates and addend changes, there are dedicated functions such as HAL_ETH_PTP_AddTimeOffset(...) and HAL_ETH_PTP_AddendUpdate(...).

Best regards,

[LCE]

N6 ETH HAL driver:

      -@- The PTP offload feature is not supported in this driver.

What a pity. :(

The HW feature that was never used anywhere...

BTW, as many users (F4, F7, H7) have been asking for PTP examples for years, it almost feels like a "low kick" (nicely said) that ST is sneaking it into N6.

[Pavel A.]

So have you checked zephyr or STLinux?