PTP ethernet configuration with TIM2 problems in cube mx 6.12.1

[jfresneda]

Hello,

I have been trying to configure the ethernet RMII with PTP synchro on cube MX. The idea is to link the PPS signal to trigger the timer. I can't manage to get the remap to be done to the ETH_PTP_PPS as is not displayed in the dropdown. According to the same cube mx that option should appear. 

On a side note when I enable the RMII_PTP_syncro I also loose all the config information of ethernet which i find rather strange. 

Do any of you have any suggestions on what's the proper way of configuring this? Is this even possible or is just a bug of the prompt that implies is possible?

 

Thanks in advance ;)

[Ghofrane GSOURI]

Hello @jfresneda 

I'm  currently checking this behavior. I will get back to you ASAP.

THX

Ghofrane

[Ghofrane GSOURI]

Hello @jfresneda 

After checking the RM0399 :41.4.22 TIM2 alternate function option register 1 (TIM2_AF1)

 

ETR source selection of TIM2 can be sourced from:
1- A normal GPIO pin
2- COMP1 output,
3- COMP2 output,
4- LSE ,
5- SAI1 frame sync A/B.
==>ETH_PPS_OUT is not listed as a selectable ETR source for TIM2, which is why STM32CubeMX does not offer a direct “ETH_PPS_OUT → TIM2_ETR” option.

However, Ticket 227158 has been raised to the development team to add the missing “TIM2_ETR is connected to GPIO” choice in the TIM2 ETR remap list.

 

THX

Ghofrane