Thread: Transmit Data using Motorola and Intel Format

  1. #1
    Registered User
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    Apr 2019

    Transmit Data using Motorola and Intel Format

    I am facing serious problem of understanding and confusion of Motorola and Intel formats. My requirement is I have to transmit 8 bytes of data using CAN communications it is serial communication. Could you please explain me if i have to transmit data say

    ex1: 234 (0xEA) -- Byte 0
    ex2: 1230(0x4CE) -- Byte 0 and Byte1

    How would i transmit? For Intel i think it is straight forward of Transmitting 0xEA. For Motorola how it will look like?

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    You look at the specification for CAN.

    If CAN says little-endian, then you transmit CE 04 regardless of whether your machine is big-endian or little-endian.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
    Registered User
    Join Date
    Feb 2019
    It's not explicit in the specifications of Controller Area Network, but it suggests all data encodings are BIG ENDIAN (pretty standard for any network packets since the 60's). Groups of bits are arranged from msb to lsb order. (See DL3-DL0 and CRC SEQUENCE fields)...

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