Alcor6L/eLua/can

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

can.setup

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

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

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.