说明：  Microchip 的MCP2515 是一款独立控制器局域网络 （Controller Area Network， CAN）协议控制器，完全 支持CAN V2.0B 技术规范。该器件能发送和接收标准 和扩展数据帧以及远程帧。MCP2515 自带的两个验收 屏蔽寄存器和六个验收滤波寄存器可以过滤掉不想要的 报文，因此减少了主单片机（MCU）的开销。MCP2515 与MCU 的连接是通过业界标准串行外设接口（Searial Peripheral Interface， SPI）来实现的。
(Microchip s MCP2515 is a stand-alone controller area network (Controller Area Network, CAN) protocol controller, complete Supporting CAN V2.0B specifications. The device can send and receive standard And extended data frames and remote frames. MCP2515 comes with two acceptance Acceptance filter mask registers and six registers can filter out unwanted Packets, thus reducing the main microcontroller (MCU) overhead. MCP2515 Connection with the MCU is through industry-standard serial peripheral interface (Searial Peripheral Interface, SPI) to achieve.)