Bluetooth: A2DP Shell

The a2dp command exposes parts of the A2DP API.

The following examples assume that you have two devices already connected.

Here is a example connecting two devices:

  • Source and Sink sides register a2dp callbacks. using a2dp register_cb.

  • Source and Sink sides register stream endpoints. using a2dp register_ep source sbc and a2dp register_ep sink sbc.

  • Source establish A2dp connection. It will create the AVDTP Signaling and Media L2CAP channels. using a2dp connect.

  • Source and Sink side can discover remote device’s stream endpoints. using a2dp discover_peer_eps

  • Source or Sink configure the stream to create the stream after discover remote’s endpoints. using a2dp configure.

  • Source or Sink establish the stream. using a2dp establish.

  • Source or Sink start the media. using a2dp start.

  • Source test the media sending. using a2dp send_media to send one test packet data.

uart:~$ a2dp register_cb
success
uart:~$ a2dp register_ep source sbc
SBC source endpoint is registered
uart:~$ a2dp connect
Bonded with XX:XX:XX:XX:XX:XX
Security changed: XX:XX:XX:XX:XX:XX level 2
a2dp connected
uart:~$ a2dp discover_peer_eps
endpoint id: 1, (sink), (idle):
  codec type: SBC
  sample frequency:
          44100
          48000
  channel mode:
          Mono
          Stereo
          Joint-Stereo
  Block Length:
          16
  Subbands:
          8
  Allocation Method:
          Loudness
  Bitpool Range: 18 - 35
uart:~$ a2dp configure
success to configure
stream configured
uart:~$ a2dp establish
success to establish
stream established
uart:~$ a2dp start
success to start
stream started
uart:~$ a2dp send_media
frames num: 1, data length: 160
data: 1, 2, 3, 4, 5, 6 ......