About Robert_149494

Robert_149494 · 2025-01-09

We have a STM32U575xx chip, where I want to read a bunch of voltages continuously.These voltages don't need to be measured at a particularly high rate, nor does the timing need to be strict. So it seemed efficient to run the ADC continuously with DMA...

Robert_149494 · 2024-12-18

I have a custom PCB with a STM32U575 for which I generate code using STM32CubeMX.I am now trying to get I2C to work. Both the I2C1 and I2C2 channels each have one I2C slave. But for both I get the same problem: the slaves do not acknowledge the maste...

Robert_149494 · 2024-09-24

I am trying to configure a single microphone with a pulse-density modulation (PDM) output on my microcontroller (STM32U575ZIT). It's a CMM-4030DT-261280-TR MEMS microphone.But I can't seem to figure out the basics. The SAI settings mention "Frame Len...

Robert_149494 · 2025-01-12

@gbm wrote:In the code above, you don't start the ADC. You've only started the calibration process which is a one time thing. Wait until the calibration is done then setup the DMA and start the ADC.HAL_ADC_Start_DMA() starts the ADC + DMA, doesn't it...

Robert_149494 · 2025-01-12

Really? The pictures are in high resolution and I can read them fine. You'd have to open the file in the browser and click the zoom button or download the bitmaps first and use a local viewer. Direct links:https://community.st.com/t5/stm32-mcus-produ...

Robert_149494 · 2024-12-18

Jinx. Yeah, that was it.

Robert_149494 · 2024-12-18

I figured it out and it was right in front of me. I had forgotten to bit-shift the device address by 1. And even my address scan failed here because I only scanned up to 0x7F, not up to 0xFF.So I can now read the slave status with:const uint8_t devAd...

Robert_149494 · 2024-10-03

Figured I'd come back with the full solution. In the end I got a single PDM microphone to work with these settings:Only the Mckdiv value I couldn't manage to change from CubeMX, so I added that as user code: In the end the "Serial audio interface (SA...

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ADC in continuous mode with DMA stops instead of running indefinitely

STM32U575xx - I2C slaves do not send ACK resulting in `HAL_I2C_ERROR_AF` error

What are frames and slots when reading from a PDM microhpone with SAI?

Re: ADC in continuous mode with DMA stops instead of running indefinitely

Re: ADC in continuous mode with DMA stops instead of running indefinitely

Re: STM32U575xx - I2C slaves do not send ACK resulting in `HAL_I2C_ERROR_AF` error

Re: STM32U575xx - I2C slaves do not send ACK resulting in `HAL_I2C_ERROR_AF` error

Re: What are frames and slots when reading from a PDM microhpone with SAI?