一种多通道CAN总线通讯M模块的设计

针对船舶燃机监控系统的CAN总线数据通信需求，设计了一种多通道CAN总线通讯模块。该方案采用M模块标准设计，使用4片独立的CAN控制器和CAN隔离收发器实现CAN节点电路、4通道CAN通讯控制和信号电气隔离。通过可编程逻辑器件CPLD以及硬件描述语言VerilogHDL，实现了M模块接口和4通道CAN总线接口的转换；在硬件设计的基础上，进行了CAN总线通信程序设计。经测试和应用结果表明，本模块能够实现4通道CAN总线大量数据通信，满足了设计需求，具有很好的应用前景。

Design of a Multi-channel CAN Bus Communication M-Module

Aiming at CAN bus communication requirement within a gas turbine monitoring system, this article introduces the design of a multi-channel CAN bus communication M-Module.SThe design is based on M-Module standard, using four CAN controllers and four isolated CAN transceivers to achieve 4-channel CAN communication control and electrical isolation. The module adopts a CPLD with VerilogHDL firmware to achieve the conversion of M-Module interface and CAN controller interface. A set of test software is developed with C language to realize CAN bus communication control by PC. The experimental results show that this module can realize communication of large amounts of 4-channel CAN data, which meets the design requirement. It can be seen that this M-Module has a good application prospect.