How to configure the audio server to use I2S1 as input

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Chip model: SF32LB58
Board: sf32lb58-lcd_a128r32n1_a1_dsi

SDK version: latest from main branch

I2S microphone connected to I2S1, model: ICS43434

Modified based on the example\multimedia\audio\4pdm example

Modified proj.conf file as follows (no other changes):

Compilation error: “rt_device_set_i2s_dma_rx_callback” implementation not found:

According to the source code, this function doesn’t seem to be used, so I commented it out:

Compilation succeeded. After downloading and sending the recording command, the recording callback function is only entered once, which is abnormal:

Tried SDK V2.4.5 — the recording callback is entered stably, but the recorded data is all zeros (V2.4.5 doesn’t have the 4pdm example, so I used the record example instead):

Additionally, using the rt-device API to operate I2S1 can correctly read data:

I’ve been debugging for several days and still can’t find the root cause. Really need help.

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Upvoted, waiting for the experts to answer

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You can first implement it based on the driver and get I2S working, refer to example\rt_device\i2s\src.

If you want to use I2S through the audio_server.c interface, you need to configure this.

Do not use the I2S_MIC macro.

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Disabling the I2S_MIC macro still doesn’t work. The rt_device driver has already been tested and can normally read recording data.

Here is the test code. Please check if there are any issues:

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See here,

https://docs.sifli.com/projects/sdk/latest/sf32lb52x/middleware/multimedia.html

In audio_server.c, where the AUDIO_RX_USING_I2S macro is used, has the I2S master/slave mode configuration been updated to match the mode using the driver interface?

Also, which version are you using? Older versions might not have properly adapted AUDIO_RX_USING_I2S. Please compare and update the section using the AUDIO_RX_USING_I2S macro in audio_server.c from the main branch.

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It’s working normally and retrieving data now, thank you so much!