Protocol decoder:avclan
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| Name | AVC-LAN |
|---|---|
| Description | A multi-drop multi-master differential CAN-like bus |
| Status | 100% |
| License | GPLv3+ |
| Source code | decoders/ |
| Input | iebus |
| Probes | — |
| Optional probes | ? |
| Options | — |
The avclan protocol decoder handles decoding IEBus frames which are used in the multimedia control AVC-LAN protcol. It handles communications between Audio Head Units, CD Changers, Amplifiers, Switches, Navigation and so on.
Protocol
The decoder matches hardware addresses to their known device names as well as device functions (aka. Logical Addresses) to known names. It also decodes frame contents for some devices such as CD-Player, Radio Tuner, CD Changer and so on.
Usage with Pulseview
An example session with Pulseview can be shown below:
Usage with sigrok-cli
➜ avclan git:(avclan-dumps) ✗ sigrok-cli -i CD-REPORT_PLAYBACK.sr -P iebus:bus=D0,avclan -A iebus=fields,avclan=devices:control:cmd:cd:audio:radio iebus-1: Broadcast iebus-1: Master: 0x190 avclan-1: AUDIO_HU2 iebus-1: Slave: 0x1ff avclan-1: GROUP_AUDIO iebus-1: Control: WRITE_DATA iebus-1: Data Length: 11 iebus-1: Data: 0x62 iebus-1: Data: 0x31 iebus-1: Data: 0xf1 iebus-1: Data: 0x01 iebus-1: Data: 0x10 iebus-1: Data: 0x01 iebus-1: Data: 0x02 iebus-1: Data: 0x03 iebus-1: Data: 0x15 iebus-1: Data: 0x00 iebus-1: Data: 0x80 avclan-1: From Function: CD avclan-1: To Function avclan-1: State: CDStateCodes.PLAYBACK avclan-1: CD #1 avclan-1: Track #2 avclan-1: Time: 03:15 avclan-1: Flags: CDFlags.0 avclan-1: Opcode: REPORT_PLAYBACK ➜ avclan git:(avclan-dumps) ✗
Resources
Available proof-of-concept implementations of IEBus and AVC-LAN protocols: