MEMS (sensors)

SAI with PDM microphone on STM32MP157CAA

Is it possible to use SAI for PDM microphones and ALSA with the current Linux kernel on a STM32MP157CAA SoC?

the sensory library does not work at all.

Hello, I'm working on a project involving voice recognition. So, I used the stm32 sensory library to complete this project and the MP23DB02MM digital MEMS PDM microphone. However, I only found one example that used STM32H747I-DISCO, so I ported it to...

Which MCUs have SAI with PDM interface, as suggested by AN5027?

I'm trying to implement a 6- or 8-microphone arrangement, as outlined in AN5027 (p25). The recommended approach is to use an SAI with PDM interface, but I'm struggling to find a suitable MCU (and subsequently, a suitable Nucleo dev board). I've not ...

Resolved! Question about SAI configuration with a MEMS microphone

I want to connect a MEMS microphone to my stm32 using its SAI interface. I found a document called "Interfacing PDM digital microphones using STM32 MCUs and MPUs" which gives some examples about how to do it.My question is about the configuration :Wh...

Resolved! Question about my code to get data from PDM microphone and convert it to PCM

I'm trying to get data from PDM microphone and convert it to PCM data. This is my first project on stm32 and I'm starting to debug the project. Could you take a quick look at my code and say if you notice something wrong ? Some part of the code come ...

Resolved! I want to develop an ultrasonic microphone array application. Is there a development board suited to this? The application would log recordings from 8 digital mems microphones to one or more SD cards.

STM32L452RE SAI microphone connection RX returns 0

I'm trying to get the SAI working in receive mode with a MEMS microphone, but when i try to receive data it only returns 0? Here is the SAI setup:saiHandle.Instance = SAI1_Block_A; // audio block A. saiHandle.Init.Protocol = SAI_FREE_PROTOCOL; sa...

How to read PDM microphone with the Serial Audio Interface(SAI)

I have a really simple application setup. I'm currently feeding in one PDM microphone. I'm using the SAI interface (code is attached). First there appears to be a bug in the ST code. The SAI_PDMCR register have a field to set up to 4 microphones (see...