LE Audio Code Migration Need tools
Current experimental platform and environment
Test platform: BT631D (NRF5340)
SDK version: NCS2.3.0
Product Overview
| Bluetooth Module Model | FSC-BT631D |
| Bluetooth version | Bluetooth 5.3 |
| Chipset | Nordic nRF5340+CSR8811 |
| lnterface | UART/I²S/USB |
| Dimension | 12mm x 15mm x 2.2mm |
| Transmit Power | nRF5340 :+3 dBm |
| CSR8811:+5 dBm(Basic Data Rate) | |
| Profiles | GAP, ATT, GATT, SMP, L2CAP |
| Operating temperature | -30°C~85°C |
| Frequency | 2.402 - 2.480 GHz |
| Supply voltage | 3.3v |
Need to implement LE audio content
- LC3 encoding and decoding
- LE transmission encoding data
- Support for multiple streaming functions
- Support CIS unicast audio function
- Support BIS broadcast audio function
Embed protocol stack contents
The execution sequence and flowchart are shown below
- The gateway receives audio data from the audio source.
- The gateway processes audio data in its application core and transmits data through the application layer:
- The host sends the encoded audio data to the network kernel subsystem (controller).
- The subsystem forwards audio data LE to the hardware radio and sends it to the headphone device.
- The headphone receives encoded audio data on the network core.
- The network kernel subsystem (controller) sends encoded audio data to the LE host on the headphone application core.
- Headphones process audio data in their application cores, which transmit data through the application layer:
- The decoded audio data is sent to the hardware audio output through I2S.
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!
Summary
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!
