NUCLEO-L476RG_DFSDM_PDM-Mic

This project acquires the PDM (Pulse Density Modulation) microphone signal using DFSDM (Digital filter for Sigma-Delta modulators interface) function of STM32 MCU and outputs its frequency characteristics by using FFT.

Software CIC filter with SPI is here.

Example

MCU board

NUCLEO-L476RG

IDE

System Workbench for STM32 (SW4STM32) + STM32CubeL4

Microphone used for the test

SPH0641LU4H-1 (Knowles)

Here is breakout board

Name		Name	Last commit message	Last commit date
Latest commit History 13 Commits
.settings		.settings
Debug		Debug
Drivers		Drivers
Inc		Inc
Src		Src
images		images
startup		startup
.cproject		.cproject
.cproject_org		.cproject_org
.gitattributes		.gitattributes
.gitignore		.gitignore
.mxproject		.mxproject
.project		.project
.project_org		.project_org
NUCLEO-L476RG.xml		NUCLEO-L476RG.xml
NUCLEO-L476RG_DFSDM Debug.cfg		NUCLEO-L476RG_DFSDM Debug.cfg
NUCLEO-L476RG_DFSDM.elf.launch		NUCLEO-L476RG_DFSDM.elf.launch
NUCLEO-L476RG_DFSDM.ioc		NUCLEO-L476RG_DFSDM.ioc
NUCLEO-L476RG_DFSDM.pdf		NUCLEO-L476RG_DFSDM.pdf
NUCLEO-L476RG_DFSDM.txt		NUCLEO-L476RG_DFSDM.txt
NUCLEO-L476RG_DFSDM_converter.log		NUCLEO-L476RG_DFSDM_converter.log
README.md		README.md
STM32L476RGTx_FLASH.ld		STM32L476RGTx_FLASH.ld
_FLASH.ld		_FLASH.ld
mx.scratch		mx.scratch

araobp/NUCLEO-L476RG_DFSDM_PDM-Mic

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NUCLEO-L476RG_DFSDM_PDM-Mic

Example

MCU board

IDE

Microphone used for the test

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