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介绍了SAE J1939协议,针对目前我国还大量使用的传统拖拉机仪表显示单元的缺点,利用CAN总线技术以及SAE J1939协议设计了一种新型拖拉机综合信息显示系统。该系统以STC89C52RC单片机为微处理器,SJA1000为CAN控制器,PCA82C250为CAN收发器,将驾驶员所需的拖拉机发动机转速、车速、水温、挡位、警示信息、作业信息等主要信息通过TFT-LCD液晶屏进行实时显示。在实际的调试过程当中,系统可靠性好,信息显示准确,运行正常。
The SAE J1939 protocol is introduced. In view of the shortcomings of the traditional tractor instrument display unit which is also widely used in our country, a new tractor comprehensive information display system is designed by using CAN bus technology and SAE J1939 protocol. The system uses the STC89C52RC microcontroller as the microprocessor, the SJA1000 as the CAN controller and the PCA82C250 as the CAN transceiver. The main information of the tractor such as the engine speed, speed, water temperature, gear position, warning information and operation information required by the driver is transmitted through the TFT- LCD screen for real-time display. In the actual debugging process, the system reliability is good, the information is displayed accurately and the operation is normal.