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CAN-BITRATE: 71-can-up matches the PEAK by USB id; NAME== never fired on hot-plug
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz
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Mikkeli Matlock
2026-10-13 16:25:38 +09:00
parent eeda69a145
commit df84b1570f
1 changed files with 3 additions and 1 deletions
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docs/impl/plans/CAN-BITRATE.md
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@@ -16,7 +16,9 @@ The OBD port is **not** gatewayed: broadcast traffic is visible passively.
Persisted (boot and hot-plug): Persisted (boot and hot-plug):
- `/etc/udev/rules.d/71-can-up.rules`: on add of `can_pcan`, wants `can-up@can_pcan.service` - `/etc/udev/rules.d/71-can-up.rules`: on add of the PEAK (USB 0c72:000c, matched like `70-can-names.rules`), wants
`can-up@can_pcan.service`. It first matched `NAME=="can_pcan"`, which never matches on udev 249, so hot-plug left the
interface down and the 2026-10-13 run recorded nothing. Fixed that day; check `can_pcan` is UP after the next replug.
- `/etc/systemd/system/can-up@.service`: oneshot; reads `/etc/default/can-<iface>`, sets the bitrate and options, brings the interface up, and stops with the device - `/etc/systemd/system/can-up@.service`: oneshot; reads `/etc/default/can-<iface>`, sets the bitrate and options, brings the interface up, and stops with the device
- `/etc/default/can-can_pcan`: `BITRATE=500000`, `CAN_OPTS="restart-ms 100"` - `/etc/default/can-can_pcan`: `BITRATE=500000`, `CAN_OPTS="restart-ms 100"`