About RPuch.2

RPuch.2 · 2023-05-26

I am performing audio acquisition from 4 MP34DT01-M microphones using SAI interface and pdm2pcm library on STM32H743.My first question is about the types of variables used in the PDM and PCM buffers. I am storing data from 4 microphones in 32-bit slo...

RPuch.2 · 2023-05-25

Hi, I have a problem with audio acquisition using PDM microphones. After using PDM_Filter, single peaks of high amplitude appear in the data in addition to the correct readings. I am using 4 microphones MP34DT01-M, STM32H743 and SAI interface. I take...

RPuch.2 · 2023-02-25

I have configured the readout of 4 PDM microphones through the SAI interface. I am using 1 slot of 32 bits per frame. I have enabled DMA.Unfortunately, when reading PDM data, the first 6 and last 2 values of the array are filled with zeros. This happ...

RPuch.2 · 2023-05-25

It seems to me that the problem is the size of the PDM buffer. If the PCM buffer is 4*4096, what should be the PDM buffer size? I am using DEC_FACTOR_64, Fs=48kHz.

RPuch.2 · 2023-05-25

Interestingly, the A microphone has values in line with those expected. In each cycle, exactly the first 2 int16 values are incorrect, the rest are fine. But in microphones B, C and D, a sort of phase shift arises. I attach a graph of the entire PCM ...

RPuch.2 · 2023-04-22

CubeIDE_1.5.0 works with my new Nucleo H743ZI2 and printf() too.

RPuch.2 · 2023-04-22

When I change from SystemPerformance to ApplicationTemplate, the Middlewares folder disappears but the compiler still requires it. Is this some CubeIDE bug?

RPuch.2 · 2023-03-05

Sound acquisition is just one of the components of my project. I chose H7 for several reasons: I need high performance (DSP, ANN), I couldn't handle DMA support in F7, I use interfaces that I didn't have in F4 and F7. The fact is that I am a layman i...

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Data types and sizes of PDM and PCM buffers for the pdm2pcm library

Incorrect audio acquisition with PDM microphone

Data acquisition from PDM microphones via SAI using DMA - problem with writing to PDM_buffer

Re: Incorrect audio acquisition with PDM microphone

Re: Incorrect audio acquisition with PDM microphone

Re: Problems with X-CUBE-AI, printf(), and default configuration on Nucleo F746ZG and CubeIDE 1.8.0, Windows 10 64bit.

Re: I can't compile the AI project on the STM32H743 chip

Re: Data acquisition from PDM microphones via SAI using DMA - problem with writing to PDM_buffer