esp-idf/examples/bluetooth/a2dp_gatts_coex/main/Kconfig.projbuild

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menu "A2DP Example Configuration"
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choice EXAMPLE_A2DP_SINK_OUTPUT
prompt "A2DP Sink Output"
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default EXAMPLE_A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
Select to use Internal DAC or external I2S driver
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config EXAMPLE_A2DP_SINK_OUTPUT_INTERNAL_DAC
bool "Internal DAC"
help
Select this to use Internal DAC sink output
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config EXAMPLE_A2DP_SINK_OUTPUT_EXTERNAL_I2S
bool "External I2S Codec"
help
Select this to use External I2S sink output
endchoice
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config EXAMPLE_I2S_LRCK_PIN
int "I2S LRCK (WS) GPIO"
default 22
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depends on EXAMPLE_A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S LRCK(WS) Driver.
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config EXAMPLE_I2S_BCK_PIN
int "I2S BCK GPIO"
default 26
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depends on EXAMPLE_A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S BCK Driver.
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config EXAMPLE_I2S_DATA_PIN
int "I2S DATA GPIO"
default 25
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depends on EXAMPLE_A2DP_SINK_OUTPUT_EXTERNAL_I2S
help
GPIO number to use for I2S Data Driver.
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endmenu