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docs: Updates to CANBUS_protocol.md 

Update the document with latest details.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2022-07-27 13:19:36 -04:00
parent 9e3feab0b4
commit 2005d4dbf4
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docs/CANBUS_protocol.md
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@ -38,23 +38,23 @@ with a RESP_NEED_NODEID response message.
The CMD_QUERY_UNASSIGNED message format is: The CMD_QUERY_UNASSIGNED message format is:
`<1-byte message_id = 0x00>` `<1-byte message_id = 0x00>`
### CMD_SET_NODEID message ### CMD_SET_KLIPPER_NODEID message
This command assigns a `canbus_nodeid` to the micro-controller with a This command assigns a `canbus_nodeid` to the micro-controller with a
given `canbus_uuid`. given `canbus_uuid`.
The CMD_SET_NODEID message format is: The CMD_SET_KLIPPER_NODEID message format is:
`<1-byte message_id = 0x01><6-byte canbus_uuid><1-byte canbus_nodeid>` `<1-byte message_id = 0x01><6-byte canbus_uuid><1-byte canbus_nodeid>`
### RESP_NEED_NODEID message ### RESP_NEED_NODEID message
The RESP_NEED_NODEID message format is: The RESP_NEED_NODEID message format is:
`<1-byte message_id = 0x20><6-byte canbus_uuid>` `<1-byte message_id = 0x20><6-byte canbus_uuid><1-byte set_klipper_nodeid = 0x01>`
## Data Packets ## Data Packets
A micro-controller that has been assigned a nodeid via the A micro-controller that has been assigned a nodeid via the
CMD_SET_NODEID command can send and receive data packets. CMD_SET_KLIPPER_NODEID command can send and receive data packets.
The packet data in messages using the node's receive CAN bus id The packet data in messages using the node's receive CAN bus id
(`canbus_nodeid * 2 + 256`) are simply appended to a buffer, and when (`canbus_nodeid * 2 + 256`) are simply appended to a buffer, and when