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How to capture the date form bluetooth's PCM and playback the date to codec

Question asked by brague tan on Aug 13, 2014

Hi All,

     I have a bt chip (BCM4334) connected with CPU's I2S interface and a codec chip (CS42888) connected with CPU's ESAI interface.

the signal(audio) path:BT headset(RF mic) ->BCM4334(PCM 8K master) -> AUDMUX4(external port) -> AUDMUX2(internal port) -> SSI1 -> ASRC( DMA 8k -> 48k) -> CS42888(ESAI 48K) .

my question:

     1.How to capture the date form bluetooth's PCM and playback the date to codec,the signal path is right?

     2.Does the Asynchronous Sample Rate Converter(ASRC) support the 8K to 48k and 48 to 8k?

Please give me if you have any references(code examples) for my question.

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