一种汽车CAN总线网关的报文接收和发送方法

摘要

提出并验证了一种汽车CAN总线网关的报文接收和发送方法.以软件缓冲区配合CAN控制器的硬件缓冲区,设计软件缓冲区管理任务,通过与硬件缓冲区的联动能够实时地接收报文,保证报文不丢失.同时,在CAN控制器硬件缓冲区未满时及时将报文发送到总线上,不漏发报文,也不影响周期报文的周期准确性.%A massage receiving and transmitting method of automotive CAN bus gateway is proposed and verified. The management tasks of the software buffer were designed to make the software buffer match up the hardware buffer of the CAN con-troller. The interaction of software buffer with the hardware buffer can realize the real-time message receiving,and ensure the message not to be lost. At the same time,the message is timely sent to the bus before the hardware buffer of CAN controller is completely filled up,which can send all the messages without missing,and maintain the periodic accuracy of periodic messages.