STM32CubeMX 6.16.1 - STM32H7 ADC3 clock/prescaler migration issue

[gsilva_bretgeld_eng]

I have an ST32CubeMX project for a STM32H7 mcu generated with STCubeMX 6.4 and using STM32Cube FW_H7 V1.9.1 where the project files are generated via cmake. Now I want to use STM32Cube FW_H7 V1.12.1, but apparently, in order to be able to generate the new files, I have to migrate the project to STM32CubeMX 6.16.1:

The problem is that, once I click in "Migrate", it removes two important lines from my code:



So, I went to CubeMX to check, and apparently, at a first glance, the field to configure ADC3 Prescaler is gone ( I do not have any other ADC on):


Also, the clock configuration tab was showing a problem. I went to check and apparently ADC clock is not allowed to be more than 100 MHz anymore:

Unfortunately, I can not slow PLL2P down, since it is used for other peripherals (e.g. SPI), but I could maybe change the clock source to PER_CK and then derive it from HSI to have it as 25 MHz ( 150 MHz + Prescaler of 6 ), although I do not know which other implications it could have.

I looked up some Issue and Release notes but I could not find anything about that. Is that an already known issue?

 

[Mahmoud Ben Romdhane]

Hello @gsilva_bretgeld_eng 

Let me thank you for posting.

For more investigation, I suggest that you provide your Ioc.File.

Thanks.

Mahmoud

[gsilva_bretgeld_eng]

Hello Mahmoud, thank you for your reply. I think I am not allowed to share my ioc here, but I am using a STM32CubeMx 1.16.1, STM32Cube FW_H7 V1.21.1 and a STM32H743ZITx microcontroller. My main problem is that the ADC3 does not have the field to configure the prescaler anymore, neither I can configure a 150 MHz clock in the ADC Select Mux. This happened after I migrated my project from CubeMX 6.4.

Thanks.

Gabriel

[Mahmoud Ben Romdhane]

Hello @gsilva_bretgeld_eng 

 

Let me thank you for bringing this issue to our attention.

The issue has been escalated internally to the dedicated team for further investigation and resolution (Ticket 227116).

As WA, I recommend that you add the code manually: hadc3.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV6;

I will let you know when the issue is fixed.

 

For the ADC Clock frequency, I suggest that you take a look at DS12110 Rev 11 Table 174. ADC characteristics (1).

 

Thanks.

Mahmoud