Dynamic Message Id Allocation and Arbitration In Can Architecture

On board communication on FPGA is an issue of interest for many researchers in recent years. Various protocols have been proposed in the literature to provide communication between central unit and peripherals. Control Area Network is also an On board protocol for communication of FPGA or microcontrollers with different peripherals. Traditionally the message id allocation in CAN is static which means only one id is given to each application and it remains same throughout the communication. This leads to biasness for various applications while others always access the bus at the time of arbitration. In this paper Dynamic approach of message id allocation from the message id window is proposed which increases the randomness and thereby decreases the biasness. The results discussed in the coming sections also prove the same.