STM32Cube for STM32U5 cannot set ADC Oversampling Ratio value

[AGula.1]

Hi,

I'm using STM32Cube to configure an STM32U575. I'm trying to configure the ADC4 so that oversampling is used. I need to set the Sequencer option to "Sequencer set to not fully configurable" so I have access to the additional channel inputs (IN15, IN16). However, when I set the Oversampling Mode to "Enabled", there is no way to set the Oversampling Ratio value. Only the Oversampling Right Shift value can be set. If I change the Sequencer option to "Sequencer set to fully configurable", the Oversampling Ratio option appears.

I can't find anywhere in the reference manual as to why the Oversampling Ratio value can't be set when in this configuration. Can someone help me understand why this option isn't available?

[Semer CHERNI]

Hello @AGula.1​ 

First let me thank you for posting.

I was able to reproduce the issue.

This problem is raised internally to be reviewed. I'll keep you posted with the updates.

Internal ticket number: 136709(This is an internal tracking number and is not accessible or usable by customers).

In the meanwhile, I propose that you add the following instruction in the static void MX_ADC4_Init(void) function to set the over sampling value:

hadc4.Init.Oversampling.Ratio = ADC_OVERSAMPLING_RATIO_2; //use the ratio value you want in this case I set it to ADC_OVERSAMPLING_RATIO_2.

Kind regards,

Semer.

[Semer CHERNI]

Hello @AGula.1​ 

The issue is fixed in the STM32CubeMx 6.7.0 available under this link.

Semer.