zephyr/samples/boards/96b_argonkey/microphone/prj.conf

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CONFIG_PRINTK=y
CONFIG_I2C=y
CONFIG_I2S=y
CONFIG_GPIO=y
CONFIG_LED=y
CONFIG_LP3943=y
CONFIG_AUDIO=y
CONFIG_AUDIO_DMIC=y
CONFIG_AUDIO_MPXXDTYY=y
# When on-board microphone is used the DMA must run w/o things
# that could slow it down. So DMA logging must be completely
# disabled and DMA interrupts must run at maximum priority.
CONFIG_DMA=y
CONFIG_HEAP_MEM_POOL_SIZE=1024