CC2564C: Does TI Bluetooth stack contain a flag to indicate packet loss

Dave Jordahl

Part Number: CC2564C

We are using a design the requires BLE and HFP WBS to run simultaneously. To do this the HFP WBS is being implemented in a STM32Fxx running TI bluetooth stack. We are adding HFP WBS functionality to the TI BT stack by adding our own mSBC codec and PLC(packet loss concealment) algorithm. Audio data is being communicated over the HCI interface rather than the PCM interface. Our PLC algorithm requires a flag that packet loss has occurred. Is there a S/W flag available in the BT stack to indicate packet loss has occurred?

over 8 years ago

0 Vihang Parmar over 8 years ago

TI__Mastermind 29311 points

Hi Dave,

Since the PLC is implemented in the AVPR of the CC2564C, my understanding is that there is no standard HCI command / Event associated with it. This means that the Bluetooth stack does not have a medium to get this notification.

I will still check internally to get a second opinion on this and follow up if I find something interesting.

Best regards,
Vihang

0 Vihang Parmar over 8 years ago in reply to Vihang Parmar

TI__Mastermind 29311 points

Dave,

There will not be an indication over HCI for packet loss.

But if you have the PCM output of the CC256x feeding into the processor for the SW PLC algorithm, you can get the cue from the data-stream that comes in the processor over the PCM lines. You will get an empty byte (zero) for a lost packet. You can use this a the indication for your SW PLC algorithm.

Hope this helps.

Best regards,
Vihang

0 Dave Jordahl over 8 years ago in reply to Vihang Parmar

Intellectual 330 points

Vihang,
Thank you for the info. This is a great help.

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CC2564C: Does TI Bluetooth stack contain a flag to indicate packet loss