LE Audio Code Migration Need tools

Current experimental platform and environment
Test platform: BT631D (NRF5340)
SDK version: NCS2.3.0

製品概要

Bluetoothモジュールのモデル FSC-BT631D
Bluetoothバージョン ブルートゥース 5.3
チップセット Nordic nRF5340+CSR8811
インターフェース UART/I²S/USB
寸法 12mm x 15mm x 2.2mm
電力を送信します NRF5340 :+3 DBM
CSR8811:+5 DBM(Basic Data Rate)
プロファイル ギャップ, に, ガット, SMP, L2CAP
動作温度 -30°C~85°C
頻度 2.402 – 2.480 GHz
供給電圧 3.3v

Need to implement LE audio content

  1. LC3 encoding and decoding
  2. LE transmission encoding data
  3. Support for multiple streaming functions
  4. Support CIS unicast audio function
  5. Support BIS broadcast audio function
1686991085 Le Audio Specifications

Embed protocol stack contents

The execution sequence and flowchart are shown below

  1. The gateway receives audio data from the audio source.
  2. The gateway processes audio data in its application core and transmits data through the application layer:
  3. The host sends the encoded audio data to the network kernel subsystem (コントローラ).
  4. The subsystem forwards audio data LE to the hardware radio and sends it to the headphone device.
  5. The headphone receives encoded audio data on the network core.
  6. The network kernel subsystem (コントローラ) sends encoded audio data to the LE host on the headphone application core.
  7. Headphones process audio data in their application cores, which transmit data through the application layer:
  8. The decoded audio data is sent to the hardware audio output through I2S.
BT631 1
BT631 2

Attention points

Le audio is currently a new technology with few mature product solutions on the market, complex engineering, and many problems that need to be solved!

まとめ

The LE audio code migration process is a very complex , but the BT631D module testing results are relatively good after migration. Users who need this function can contact the Feasycom team!