About MBank.1

MBank.1 · 2021-02-15

Hello everyone!I am struggling with playback via I2S to external DAC on STM32L051/53. Audio:file in external SPI flash,WAV format16KHz sampling rate16bit depthI run the core on internal oscillator. My 'real' I2S clock (WS frequency) is 15,957kHz, whi...

MBank.1 · 2021-04-16

That's 1kHz sine wave that was sent via I2S to UDA1334 DAC, with it's FFT. Looks pretty awful too me, although it sounds pretty much like a 1KHz wave... I think it shouldn't look like that though. It looks pretty much the same with and without load...

MBank.1 · 2021-04-12

Thanks!| I've already ruled out any clock gaps. Will look into other aspects you mentioned, tomorrow.I do understand the rest, but I don't see how could I check the energy dumped to the pins. Do you mean energy from MCU to pins of external flash and ...

MBank.1 · 2021-04-12

I just figured out another event, that might be alarming. in HAL_SPI_TxRxCpltCallback I trigger conversion of the buffer from 8-bit to 16-bit buffer.There I check the state of the buffers. Each run, after reste of MCU I get exactly 3 events, where th...

MBank.1 · 2021-04-12

Hello Jan,thank you for your reply very much.It took me while since I was reassigned somewhere else - obviously.I did check it how you advised though. I toggle some pin (ch4) when I finish reading and converting data from the external flash, and togg...

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I2S audio crackly noise on STM32L05x

Re: I2S audio crackly noise on STM32L05x

Re: I2S audio crackly noise on STM32L05x

Re: I2S audio crackly noise on STM32L05x

Re: I2S audio crackly noise on STM32L05x