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Unexpected I2S data output #356

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dannyhui-xmos opened this issue May 10, 2024 · 0 comments

dannyhui-xmos commented May 10, 2024 •

edited

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There is a constant output (0xA5A5A5A5) from I2S_DOUT pin after the FFD system up.

Finding:

FreeRTOS kernel set the default value of the stack to tskSTACK_FILL_BYTE (0xa5U) for water level checking
The function i2s_ratio_n from modules/io/modules/i2s/src/i2s_master.c:79 haven't initialized/cleared the default value of the variable out_samps.

Suggested Fix:
Initialize the variables before use
memset(in_samps, 0, sizeof(in_samps));
memset(out_samps, 0, sizeof(out_samps));

Testing Kit: XK-VOICE-L71

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