esp-idf/examples/peripherals/i2s/i2s_basic/i2s_pdm/main/Kconfig.projbuild

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menu "I2S PDM Example Configuration"
choice EXAMPLE_PDM_DIR
prompt "I2S PDM direction"
default EXAMPLE_PDM_TX
help
Select example PDM direction
config EXAMPLE_PDM_TX
bool "PDM TX"
help
PDM TX example will play 'twinkle twinkle little star' in three tones.
config EXAMPLE_PDM_RX
bool "PDM RX"
# ESP32-C3 not support PDM RX for now, its hardware does not fully supported PDM RX mode
depends on !IDF_TARGET_ESP32C3
help
PDM RX example will show the received data from a PDM microphone.
endchoice
endmenu