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MaCh_4826131
Level 1
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Level 1

Hi,

I have a microphone connected to my CYW920819 board via i2s.

Unfortunately I am unable to get it to stream to my bt headphones via a2dp (is it even possible?).

I am using the watch example for this board and followed the blog below to route i2s.

https://community.cypress.com/t5/Resource-Library/PCM-I2S-Clock-setting-in-CYW20706/ta-p/246335?emcs...

Any help would be greatly appreciated.

Thanks in advance!

 

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1 Solution
DheerajPK_41
Moderator
Moderator 750 replies posted 500 likes received 500 replies posted
Moderator

Hi,

CYW20819 is configured as i2s master in the watch app (in wiced_audio_start()). So the i2s mic giving the input should be a slave inroder to work the interface. And in master mode the clock rate for 20819 can be 16 kHz × 16 bits per frame = 256 kHz as per the spec (https://www.cypress.com/file/462851/download).  Please ensure that these conditions are satisfied. 

Also, May I know which  I2S microphone are you using?

I will check whether there is any other restrictions to use i2s interface in 20819 chip or not.

 

Thanks,

-Dheeraj

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3 Replies
DheerajPK_41
Moderator
Moderator 750 replies posted 500 likes received 500 replies posted
Moderator

Hi,

Could you please provide us more information on how you connected microphone to CYW920819 board?

Are you using any audio/codec board?

 

Thanks,

-Dheeraj

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MaCh_4826131
Level 1
25 sign-ins 10 sign-ins 5 questions asked
Level 1

Hi, 
I've connected it to J4.1 (Di), J12.6(WS) and J12.5 (CLK).

I'm not using another audio/codec board, just an I2S microphone. 

 

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DheerajPK_41
Moderator
Moderator 750 replies posted 500 likes received 500 replies posted
Moderator

Hi,

CYW20819 is configured as i2s master in the watch app (in wiced_audio_start()). So the i2s mic giving the input should be a slave inroder to work the interface. And in master mode the clock rate for 20819 can be 16 kHz × 16 bits per frame = 256 kHz as per the spec (https://www.cypress.com/file/462851/download).  Please ensure that these conditions are satisfied. 

Also, May I know which  I2S microphone are you using?

I will check whether there is any other restrictions to use i2s interface in 20819 chip or not.

 

Thanks,

-Dheeraj

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