基于DSP的CAN总线应用层协议开发与实现

Development and Realization of CAN Application Layer Based on DSP

针对某红外探测系统中信息交互的需要,结合TMS320F2812DSP中增强型CAN控制器模块的特点,设计了一种CAN应用层协议。该协议对扩展帧的报文标识符进行了详细定义,保证了重点探测目标的优先级,同时对信息的超时及不可靠节点制定了相应规则,满足了探测系统对信息更新的要求。最后简要介绍了协议的硬件和软件实现。

To satisfy the requirements of the communication in the IR detecting system, an application layer CAN protocol is developed, after analyzing the peculiarities of CAN block on TMS320F2812DSP. In order to assure the priority of important objects and the require of message update, each bit of message identifier have been defined, and rules have been made for the delay of message and the unstable nodes in this protocol. Finally, the hardware and software realization of the protocol are briefly introduced.