tailieunhanh - CAN Controller Area Network

Carrier Sense Multiple Access (CSMA) is a probabilisticMedia Access Control (MAC) protocol in which a node verifies the absence of other traffic before transmitting on a shared transmission medium CAN uses a nondestructive bitwise arbitration, which means that messages remain intact after arbitration is completed even if collisions are detected. All the arbitration takes place without corruption or delay of the message that wins the arbitration. | 10 14 2012 CAN Controller CAN Is Central To Automotive Networks Area Network 1 10 14 2012 r CAN Tutorial r F Why CAN I Mature standard r CAN protocol more than 14 years Numerous CAN products and tools on the market Hardware implementation of the protocol r Combination of error handling and fault confinement With high transmission speed Simple Transmission Medium Twisted pair of wires is the standard but also just one wire will work r Other links works too Opto - or radio links Excellent Error Handling CRC error detection mechanism Fault Confinement r Built-in feature to prevent faulty node to block system Most used protocol in industrial and automotive world Best Performance Price ratio I CAN Tutorial k F CAN Protocol . What is CAN ISO-OSI Reference Model CAN Bus Logic Typical CAN Node CAN Bus Access and Arbitration CAN Bit Coding Bit Stuffing CAN Bus Synchronization CAN Bit Construction Relation between Baud Rate and Bus Length Frame Formats 1 Frame Formats 2 Frame Formats 3 Frame Formats 4 Fault Confinement 1 Fault Confinement 2 Undetected Errors 2 10 14 2012 CAN Tutorial What is CAN Controller Area Network r Invented by Robert Bosch GmbH Asynchronous Serial Bus Absence of node addressing V Message identifier specifies contents and priority Lowest message identifier has highest priority Non-destructive arbitration system by CSMA with collision detection Multi-master Broadcasting concept Sophisticated error detection handling system Industrial and Automotive Applications Gesellschaft mit beschrankter Haftung abbreviated GmbH most common GesmbH or . German for company with limited liability Carrier Sense Multiple Access CSMA is a probabilistic Media Access Control MAC protocol in which a node verifies the absence of other traffic before transmitting on a shared transmission medium CAN uses a nondestructive bitwise arbitration which means that messages remain intact after arbitration is completed even if collisions are detected. All the arbitration takes .