基于嵌入式STM32的ModbusRTU协议实现

随着工业现场总线技术的快速发展，Modbus协议以其高效性、可靠性，广泛应用于电力行业。为了提高电厂对数据采集的可靠性和实时性，提出了将Modbus通信协议与32位STM32F103ZE微处理器相结合的设计方案，介绍了系统的总体设计方案和Modbus通信协议的内容。在嵌入式实时操作系统μC／OS-Ⅱ上实现了基于ModbusRTu通信协议的主站和从站的通信，并详细讨论了Modbus通信协议中CRC校验码的生成。实验结果表明，该方案有效地实现了Modbus协议，可以广泛地应用于电厂和其他工业现场。

Implementation of Modbus RTU Communication Protocol Based on STM32

With the rapid development of industrial field bus technology, the Modbus protocol is widely used in electric power industry because of its high efficiency and reliability. In order to improve the reliability and real-time performance of data acquisition of the power plant, this paper puts forward a design of Modbus communication protocol with a 32-bit STM32F103ZE microprocessor. The overall design scheme of the system and the content of Modbus Communication Protocol are introduced. The communication between master station and slave station is implemented based on the Modbus RTU communication protocol in the embedded real-time operating system μC/OS-Ⅱ.The generation of Cyclic Redundancy Check in the Modbus Communication Protocol is discussed. The experimental results show that the scheme has realized the Modbus protocol effectively, which can be widely used in power plants and other industrial field.