i2s_pdm example - accessing raw pdm data

jjjbbb
Posts: 1
Joined: Sun Dec 31, 2023 11:36 pm

i2s_pdm example - accessing raw pdm data

Postby jjjbbb » Mon Mar 11, 2024 4:00 am

Hi,

Is it possible to access the raw pdm data (not converted to i2s) in the i2s_pdm_rx esp-ifd example?

I am looking for an easy way to potentially store the raw pdm data eventually. Either in flash(I only need a few seconds) or on an SD card

Thanks

ESP-Kevin
Posts: 9
Joined: Fri Jul 01, 2022 6:10 am

Re: i2s_pdm example - accessing raw pdm data

Postby ESP-Kevin » Sun Mar 24, 2024 10:57 am

It's a pity that the raw PDM is not supported in IDF currently. But will be supported in the future ;)

ESP_Sprite
Posts: 9713
Joined: Thu Nov 26, 2015 4:08 am

Re: i2s_pdm example - accessing raw pdm data

Postby ESP_Sprite » Mon Mar 25, 2024 1:52 am

Note that you may be able to work around this by configuring the I2S peripheral in normal (I2S) mode with the correct parameters for the PDM serial format; you should be able to receive the raw samples that way (but you won't have access to the decoded samples as the decoder isn't used.)

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