Use basic DFSDM on STM32F12ZG

[David Wallén]

Hi,

I am trying to record audio on a STM32F412 with an MP23DT05-A (digital MEMS microphone made by ST) using DSFDM.

After basic configuration in CubeMX the project does not compile. The error is a missing function:

undefined reference to `__HAL_RCC_DFSDMAUDIO_CONFIG'

which does not seem to be in the libraries that CubeMX has generated. I searched though the codebase on the filesystem and this function is not found anywhere.

To achieve this I have followed both the Application note: https://www.st.com/resource/en/application_note/dm00380469-interfacing-pdm-digital-microphones-using-stm32-mcus-and-mpus-stmicroelectronics.pdf

and the Youtube tutorial (which does basically the same thing) to no luck.

Has anyone faced a similar issue and could point me in the right direction?

Many thanks in advance!

Best Regards,

David

[David Wallén]

It seems to be related to clock source is selected. With:

"PDM / SPI input from ch0 and internal clock"

selected it works, but the error arises when switching to

"PDM / SPI input from ch0 and external clock"

the above error arises.

Is there some additional configuration I have to do which I am missing?

Thanks in advance!

Best Regards,

David

[Ctu.1]

I also met this problem. Have you solved it?