Hi,

First of all, let me tell you that CC2650STK is in the process of being discontinued. I am not sure a new design should be based on this product. In addition, TI provides an audio plugin that might interest you.

1 & 3- The audio example is not located inside the simplelink SDK but inside the tirtos SDK. You will find it here: tirtos_cc13xx_cc26xx_z_zz_zz_zz\examples\TI\CC2650STK\pdmstream
Sometimes some examples are removed from the SDK, so you can try to look in the older SDKs to find the example you want. However keep in mind that some examples might be removed because of some issues (I am not fully aware of this audio example).

2- You can find an audio example using I2S (not PDM) here: https://github.com/ti-simplelink/ble_examples/tree/simplelink_cc2640r2_sdk-2.20/examples/rtos/CC2640R2_LAUNCHXL/bleapps

4- The description of your solution seems corect

5- Please review the schematic of the CC2650STK for details

I hope this will help,

Regards,

Hi Clément,

Thanks for your reply.

I've tried to immigrate the C:\ti\simplelink\ble_sdk_2_02_01_18\examples\cc2650stk\sensortag_audio to  C:\ti\simplelink\ble_sdk_2_02_03_08\examples\cc2650stk

The attached file is my project sensortag_audio.zip

@ I've build it successfully and flash multiple images ok.

@ The following is my test steps:

CC2650STK Sensortag power on --> Open the Android Sensortag App and Connect the device

Select the BLE Audio Control --> then it will enter new page that shows Volume Meter, Connection Status, Current connection Interval

The Connection Status will show Starting Service ->Connect ->Enabling audio

Then I press the User button of sensortag , the Connection Status will show  Audio Rx -> Idle ->Disconnect

It can not demo "voice over BLE" that described in http://software-dl.ti.com/lprf/simplelink_cc2640r2_latest/docs/blestack/ble_user_guide/html/voice/ble_voice.html#ble-voice-frame-data

@ The problem is when I press the user button of sensortag,

the error happened,it will go to PDMCC26XX_STREAM_ERROR, then the connection status becomes "Idle" in android app (SensorTag App).

if (events & PDM_EVT_BLK_ERROR) {
/* Notify caller of error */
streamNotification.status = PDMCC26XX_STREAM_ERROR;
object->callbackFxn(pdmHandle, &streamNotification);
}

Can you please help me check where my project configuration went wrong?

Thanks a lot.

Best regards,

MM

Hi,

The problem seems to be due to the PDM driver itself. It would be nice to verify that.

Please do the following:

- Without the BLE connection, do you successfully read the audio data and store it in a buffer?

If not, this part of the system will require to be fixed first.

Regards,

Hi  Clément,

Is there sensortag_audio project for cc2650stk in platform of ble_sdk_2_02_03_08, tirtos_cc13xx_cc26xx_2_21_01_08 and xdctools_3_32_00_06_core?

There are too few reference materials.

Best regards,

Yapi

Hi,

The exact example you are asking for does not exist. You will be required to port it from other versions as I suggested.

Please note that more examples are available for the LPSTK-CC1352R.

Regards,

Hi Clément,

I try to use gatttool, please check the history in the attachment.

After clicking the user button of the cc2650stk sensor tag multiple times, the red LED is always on, and then suddenly disconnected.

Do you know how to use gatttool to check the problem?

Which UUID Services should I confirm?

Thank you.

Log History I :

Log History II  :

Best regards,

MM

Hi Clément,

Sorry,correct the error description :

After clicking the user button of the cc2650stk sensor tag multiple times, the red LED is always on, and the audio frame is stopped, and the sensortag can not write/read anything.

When write the command of "disconnect" then the sensortag green led is blinking.

Hi,

The description of the problem, makes me think to an error in the BLE connection. This error might be due to various elements, maybe a memory leak.

Try to use the ROV once the error has occurred. You can use the debugging chapter of the BLE Stack User's guide to help you in this debug.

Kind regards,