esp-idf/examples/bluetooth/a2dp_sink/main/Kconfig.projbuild

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menu "A2DP Example Configuration"
choice A2DP_SINK_OUTPUT
prompt "A2DP Sink Output"
default A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
Select to use Internal DAC or external I2S driver
config A2DP_SINK_OUTPUT_INTERNAL_DAC
bool "Internal DAC"
help
Select this to use Internal DAC sink output
config A2DP_SINK_OUTPUT_EXTERNAL_I2S
bool "External I2S Codec"
help
Select this to use External I2S sink output
endchoice
config I2S_LRCK_PIN
int "I2S LRCK (WS) GPIO"
default 22
depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S LRCK(WS) Driver.
config I2S_BCK_PIN
int "I2S BCK GPIO"
default 26
depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S BCK Driver.
config I2S_DATA_PIN
int "I2S DATA GPIO"
default 25
depends on A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S Data Driver.
endmenu