Question
STM32H743 DFSDM, PDM Microphones
Hi
I am using the Stm32H743 Nucleo Board.
I followed the app note to use the DFSDM(https://www.st.com/content/ccc/resource/technical/document/application_note/group0/7d/62/3d/ad/24/57/47/78/DM00380469/files/DM00380469.pdf/jcr:content/translations/en.DM00380469.pdf).
The Mics used is the IM69D130(https://www.infineon.com/dgdl/Infineon-IM69D130_Microphone_Shield2Go-GS-v01_00-EN.pdf?fileId=5546d462677d0f4601677f3486ed0941)
I have the STM32H743 running at 480MHZ.
DFSDM is 60MHz.
CLK DIV 25.
The FOSR 50
Over sampling is 1.
It is running on the dma on half call back and full call back.
the arrays are shifted to the left by 8bits
The two data arrays are interleaved.
The play buffer is always at max data.
Kind Regards