MEMS (sensors)

PDM to PCM via DFSDM getting nothing but static

On the BL47E-IOT01A2 there are two mems microphones (MP34DT01) both connected to DFSDM1_DATIN2. I'm trying to extract the data from just one of those boards and convert it to PCM using a DFSDM filter. I've configured DFSDM Channel 2 to connect to PDM...

Resolved! I am using Sensortile.Box which has a analog microphone. I thought whether DFSDM filter can be used. Kindly confrm STM32L4R9ZI supports internal ADC to use DFSDM .

Sinc Filter Order and value output of DFSDM

Hello dear ST-Forum,I'm currently working on DFSDM and MEMS-Microphone and am trying out the sinc filters. By changing the filter order e.g. from filter order 1 to filter order 3, the values increase dramatically. I have not found any proper calculat...

Injected conversion mode with 8 MEMS and DFSDM

Hello,I want to realise a project with the STM32 Nucleo F767ZI Development Board where i need to sample audio data from 8 MEMS Microphones. Since the board only features 4 DFSDM filters but 8 input channels i need to multixplex them. What i already k...

Help using MP34DT01 with DFSDM on board microphone on B-L475E-IOT01A1.

HiI am trying to record audio at 44.1 KHz with the on board microphones on B-L475E-IOT01A1 device, and since the firmware package does not contain DFSDM example for this particular board, I tried adapting the DFSDM example from the STM32L476-DISCOVE...

Microphone array design using an STM32F7 microcontroller. GPIO sampling vs DFSDM module.

Posted on March 18, 2017 at 11:51Hi all,I am attempting to build a microphone array out of digital MEMS microphones and I am trying to determine if I can achieve a reasonable system on an STM32F7 microcontroller. Ideally I would like to capture the ...