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XCORE-VOICE Solution
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Unexpected I2S data output #356

Open dannyhui-xmos opened 6 months ago

dannyhui-xmos commented 6 months ago

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

Finding:

  1. FreeRTOS kernel set the default value of the stack to tskSTACK_FILL_BYTE (0xa5U) for water level checking
  2. 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