Alcor6L/eLua/can
< Alcor6L
This module contains functions for accessing the CAN interfaces of the eLua CPU
Two types of CAN identifier numbers are used:
- can.ID_STD: Standard CAN identifiers are 11 bits in length
- can.ID_EXT: Extended identifiers are 29 bits.
Functions edit
can.setup edit
Setup the CAN interface
clock = can.setup( id, clock )
- id - the ID of the CAN interface
- clock - the clock of the CAN interface.
Returns:
- clock - The actual clock set on the CAN interface. Depending on the hardware, this might have a different value than the clock parameter.
can.send edit
Send message over the CAN bus.
can.send( id, canid, canidtype, message )
- id - the ID of the CAN interface.
- canid - CAN identifier number.
- canidtype - identifier type: can.ID_STD or can.ID_EXT
- message - message in string format, 8 or fewer bytes.
Returns: nothing.
can.recv edit
Receive CAN bus message.
canid, canidtype, message = can.recv( id )
- id - the ID of the CAN interface.
Returns:
- canid - CAN identifier number.
- canidtype - identifier type: can.ID_STD or can.ID_EXT
- message - message in string format, 8 or fewer bytes.