How activate one AF and more Analog func on same pin G431

[MM..1]

Hi i plan new design and require activate for example on PA3 ADC1_IN4 and same time COMP2_INP.

Is this possible and if yes how sequence to setup HAL LL or direct?

EDIT: Renamed from more AF ... only one AF poss.

[Andrew Neil]

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@MM..1 wrote:

Is this possible 

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I think not - you can only select one AF ?

EDIT:

The AFSEL takes one value to select one AF - it's not a bitmap:

[Tesla DeLorean]

No

But check the internal plumbing / connectivity of COMP2_INP, might be some, will be fixed/limited.

Otherwise use two pins and wire.

Also does an ADC need an AF setting? It's kind of implied via "Analogue Input" mode for the pin and not the AF mapping

[AScha.3]

Hi,

just try to enable both in CubeMx , if possible you can do it ( = if both on analog mux).

see on F303, the green "+" , can use comp, adc, opamp on same pin:

(Probably same on your G431 .)

And gen.code, just look, how Cube is doing/setting...then you know, how to do.

If need set AF , say TIMx , only one AF can be set in register for AF-function on a pin.

So impossible to set the AF mux to two different values same time. (need 2 pins then, as Tesla said.)

[MM..1]

Perfect G4 have this + too, but what if i need activate same time TIM2CH4 and ADC and COMP (based on 303 showed). Or better say one AF plus some analogs.

And from your image i mean MX miss EXTI here, because this is too combinable or ?

[Andrew Neil]

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@MM..1 wrote:

say one AF plus some analogs.

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Doesn't selecting any analogue disable all AF ?

EDIT:

Yes, it does:

[AScha.3]

You see any more "+" here ? Then use it.

Otherwise you select other AF , maybe TIMx , then you have ONLY this AF.

[MM..1]

I see , that MX dont do this. I ask is this possible by internal hw architecture ... 

[Andrew Neil]

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@Andrew Neil wrote:
you can only select one AF ?

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Indeed - only one:

[Andrew Neil]

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@MM..1 wrote:

 I ask is this possible by internal hw architecture ... 

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No: See RM screenshots.

tl;dr:

• Only a maximum of one AF for each pin;
• Selecting Analogue mode disables all AF.