STM32 MCUs products

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Array of PDM microphones best bus interface

Hello,I would like to design a microphone array with up to 16 microphones. I want to use the stm32h7a3zi board which has a lot of peripherals.I was looking at the DFSDM interface, but with only 8 channels / 8 filters up to 8 pdm microphones can be ha...

frnt by Senior
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Beam Forming sample for MIC ARRAY

I'm in the first steps of my project. Selected STM32F446ZE Nucleo board for developing MIC ARRAY application as 446ZE used in BLUE COIN and made my own same arranged mic array board. Now I found there is no Beam Forming sample for it!ST has a documen...

_behn4m by Associate II
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STM32 DFSDM, cannot get the right resolution

Hello STM32-Community,I'm currently working witha PDM Microphone (SPH0641) and try to get it to work via DFSDM. I'm using the DFSDM tutorial vom STM32 to achieve the resolution required for my system.Currently I'm using:Filter Order : 3Fil...

NW.2 by Associate II
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STM32H723 DFSDM Inject Mode

Hello ST Community​I encountered many problems when using DFSDM peripherals,Especially the trigger problem of injection mode​The STM32Cube H7 package which providing DFSDM example,Only refer a applicableation About Audio​Can the ST official provide t...

GWenJ.1 by Associate II
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Changing filter and channel properties during the run

Hi,I'm using DFSDM on NUCLEO-L476RG, the DFSDM configured as follows:static void MX_DFSDM1_Init(void) {   /* USER CODE BEGIN DFSDM1_Init 0 */   /* USER CODE END DFSDM1_Init 0 */   /* USER CODE BEGIN DFSDM1_Init 1 */   /* USER CODE END DFSDM1_...

lFurm.1 by Associate
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Resolved! DFSDM Output resolution

When I use DFSDM, I configure FOSR= 256 ISOR=1 and the output is outside the range in the reference guide +-16777216

GWenJ.1 by Associate II
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Resolved! STM32L4 DFSDM clipping

Any ideas why values would be non linear in the approximately the upper 1 to 2 bits?For the setup below, it is linear to between -17000 to +14000. Doubling the + output only yields around +18000. These are raw values. This really acts like an overflo...

_EFrie by Associate III
  • 3 replies
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