Source code for isotp.can_message

__all__ = ['CanMessage']

from binascii import hexlify

[docs]class CanMessage: """ Represent a CAN message (ISO-11898) :param arbitration_id: The CAN arbitration ID. Must be a 11 bits value or a 29 bits value if ``extended_id`` is True :type arbitration_id: int :param dlc: The Data Length Code representing the number of bytes in the data field :type dlc: int :param data: The 8 bytes payload of the message :type data: bytearray :param extended_id: When True, the arbitration ID stands on 29 bits. 11 bits when False :type extended_id: bool :param is_fd: When True, message has to be transmitted or has been received in a CAN FD frame. CAN frame when set to False :type is_fd: bool :param bitrate_switch: When True, message has the Bit Rate Switch (BRS) bit set. :type bitrate_switch: bool """ __slots__ = 'arbitration_id', 'dlc', 'data', 'is_extended_id', 'is_fd', 'bitrate_switch' arbitration_id: int dlc: int data: bytes extended_id: bool is_fd: bool bitrate_switch: bool def __init__(self, arbitration_id: int = 0, dlc: int = 0, data: bytes = bytes(), extended_id: bool = False, is_fd: bool = False, bitrate_switch: bool = False ): self.arbitration_id = arbitration_id self.dlc = dlc = data self.is_extended_id = extended_id self.is_fd = is_fd self.bitrate_switch = bitrate_switch def __repr__(self) -> str: data_str = hexlify([:64]).decode('ascii') if len( > 64: data_str += '...' if self.is_extended_id: id_str = "%08x" % self.arbitration_id else: id_str = "%03x" % self.arbitration_id addr = "0x%x" % id(self) flags = [] if self.is_fd: flags.append('fd') if self.bitrate_switch: flags.append('bs') flag_str = ','.join(flags) if flag_str: flag_str = f'({flag_str})' return f'<{self.__class__.__name__} {id_str} [{self.dlc}] {flag_str} "{data_str}" at {addr}>'