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| author | Kevin O'Connor <kevin@koconnor.net> | 2022-07-27 13:38:23 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2022-07-29 11:40:54 -0400 |
| commit | dc012f8659989f572eab1b839da5ab4c38376155 (patch) | |
| tree | b914cc3ab5342e521c69e2e064eb07c003a0f053 /docs | |
| parent | 2005d4dbf45bc15429ac372a290aa36111ab533e (diff) | |
| download | kutter-dc012f8659989f572eab1b839da5ab4c38376155.tar.gz kutter-dc012f8659989f572eab1b839da5ab4c38376155.tar.xz kutter-dc012f8659989f572eab1b839da5ab4c38376155.zip | |
docs: Recommend allow-hotplug in CANBUS.md when using USB to canbus bridge
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/CANBUS.md | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/docs/CANBUS.md b/docs/CANBUS.md index 90efacf5..f8d64676 100644 --- a/docs/CANBUS.md +++ b/docs/CANBUS.md @@ -4,9 +4,9 @@ This document describes Klipper's CAN bus support. ## Device Hardware -Klipper currently only supports CAN on stm32 chips. In addition, the -micro-controller chip must support CAN and it must be on a board that -has a CAN transceiver. +Klipper currently supports CAN on stm32 and rp2040 chips. In addition, +the micro-controller chip must be on a board that has a CAN +transceiver. To compile for CAN, run `make menuconfig` and select "CAN bus" as the communication interface. Finally, compile the micro-controller code @@ -73,7 +73,7 @@ powered and wired correctly, and then run: If uninitialized CAN devices are detected the above command will report lines like the following: ``` -Found canbus_uuid=11aa22bb33cc +Found canbus_uuid=11aa22bb33cc, Application: Klipper ``` Each device will have a unique identifier. In the above example, @@ -118,7 +118,13 @@ Some important notes when using this mode: menuconfig" and the bus speed specified in Linux is ignored. * Whenever the "bridge mcu" is reset, Linux will disable the - corresponding `can0` interface. Generally, this may require running - commands such as "ip up" to restart the interface. Thus, Klipper - FIRMWARE_RESTART commands (or regular RESTART after a config change) - may require restarting the `can0` interface. + corresponding `can0` interface. To ensure proper handling of + FIRMWARE_RESTART and RESTART commands, it is recommended to replace + `auto` with `allow-hotplug` in the `/etc/network/interfaces.d/can0` + file. For example: +``` +allow-hotplug can0 +iface can0 can static + bitrate 500000 + up ifconfig $IFACE txqueuelen 128 +``` |