CYBT-343026 I2S data output voltage level problem

[ted0]

Hello,

I am trying to send audio data with I2S sink example in CYBT-343026.

And I am using MAX98357A as an audio codec.

I couldn't get the sound from the speaker after connecting the two evaluation boards.

I found out that the Data signal from CYBT-343026 has a low voltage lever which is 1.13V.

(Please find the attached oscilloscope capture below)

since the audio codec needs min 1.3V for input audio data.

I need to know what I should change to get enough voltage levels.

(other two BCLK, WS has enough voltage lever of 3V) 

Thanks

[DheerajPK_41]

Hi,

Are you using the CYW920706WCDEVAL or a custom kit? Also, may I know which application are you using?

Let us check it at our side and get back to you.

Thanks,

-Dheeraj.P.K

[ted0]

Hello,

I am using CYBT-343026-EVAL board.

And for the application, WICED-Studio, 20706-A2_Bluetooth, snip.bt.a2dp_sink

Thanks,

[DheerajPK_41 · Accepted solution]

Hi,

Could you please try using Modustoolbox & BTSDK since it is the latest software. It has CYW20706 support. The bug fixes will be released in the latest software only. 

Thanks,

-Dheeraj.P.K

[ted0]

Hi Dheeraj,

I've already tried to use ModusToolbox at first.

But it doesn't support CYBT-343026-EVAL. That's why I was trying with Wiced Studio..

You can find the supported_targets in the down below. I will also attach the capture of the code.

mtb-example-btsdk-audio-a2dp-sink/makefile at master · Infineon/mtb-example-btsdk-audio-a2dp-sink · ...

Thanks,

[DheerajPK_41]

Update

The app supports CYW920706WCDEVAL. We can port the app to CYBT-343026-EVAL and use it. CYBT-343026-EVAL also has the same chip (CYW20706). The difference is between the BSP - Hardware configurations.