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ABlum.2
ABlum.2
Associate III
June 16, 2021
Question

What should I get from HAL_DFSDM_FilterGetRegularValue function?

  • June 16, 2021
  • 2 replies
  • 1209 views

Hello everyone,

Can someone clarify what I'm reading in this function? This will be the value of the analog signal or it is a 1 and 0 train that I should pass through a digital lowpass filter?

Regards

Alan

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2 replies

Amel NASRI
Amel NASRI
ST Technical Moderator
June 16, 2021

Hi @ABlum.2​ ,

This is how the function is described in UM1725  Description of STM32F4 HAL and low-layer drivers:

0693W00000BbAgoQAF.pngDoes this answer your question?

-Amel

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ABlum.2
ABlum.2Author
Associate III
June 17, 2021

Hi @Amel NASRI​ ,

Thanks for the answer, my doubt is exactly what does conversion value means? Is this the represented value of the ADC messure or it is just the value that I have to pass through the lowpass filter before the actual representation of the ADC value? Since I am getting as a result from this function 1 and -1 I am not sure if those are real values or just bit representation.

Regards

Alan

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