stm32f334 ADC conflict

[bestyeng]

Hi all.
Why when I configure an ADC input in PA2 port, I have a conflict with another pin PA3 port that is configured as GPIO?
Many thanks.

[Andrew Neil]

In your screenshot, the conflict is not on IN2 - it's on IN3:

Presumably, IN3 is on PA3?

[bestyeng]

Hi Andrew, the problem is on IN3 mapped on PA2, but the tool tell that the conflict is on PA3 that is mapped as GPIO.

[STTwo-32]

Hello @bestyeng @Andrew Neil 

In your case if you want to set IN3 on the IN3 Differential, you will need to use Both PA2 ADC Positive input analog and PA3 for Negative input analog. For the single-ended mode you just need the IN3 on the PA2. You can see more about that on the following Figure 25 From the RM0364: 

Best Regards.

STTwo-32

[bestyeng]

Ok, many thanks. So in this case single ended is only a warning, I may not consider it?
Best regards.

[Ozone]

If you selected single-ended and not differential, this is a bug in the Cube tool.

[STTwo-32]

In single-ended, it should be working fine. The only warning is that you can't do a differential mode without PA3 available.

Best Regards.

STTwo-32