PDM digital microphone signal transduction and STM32 i2s PCM interface applications ---- important document list

      PDM digital microphone signals to the PCM pulse requires a subsampling, ST PDM2PCM mentioned a package of the above work can be done. The source code is not open source software package, using a simple manual also makes you go crazy, I think it may be because more advanced ST MCU directly with the hardware decoding, so soft decoding attention on the low-end MCU I2S interface is not enough. Fortunately, before the signal processing work done, some of the concepts and internal logic can guess pretty close, to use it without any difficulty to get started, this package to use mainly refer to the following several documents.

Reference documents:

1, how to connect to the PDM digital microphone microcontroller STM32

AN5027 used Arm® Cortex® MCU STM32 32 bit PDM digital microphone is connected

2、  PDM audio software decoding on STM32 microcontrollers

AN3998 on STM32 microcontroller PDM software audio decoder

3, UM2372_ PDM2PCM package for the introduction STM32F4_F7_H7

STM32Cube PDM2PCM software library for the STM32F4/F7/H7 Series

4, application development STM32 I2S audio-based presentation

Based audio application development introduced the STM32 I2S

5, STM32F407 manual

STM32F407 / 417

 6, using the PDM microphone DFSDM develop applications introduced

DFSDM develop applications using the PDM microphone introduced

 

Respect the original technical articles, please indicate.

 https://www.cnblogs.com/pingwen/p/11302452.html