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随着智能电网的发展,电力系统对智能电子设备提出了新的需求,介绍了一种基于Modbus协议的DSP与触摸屏之间的通信方法,实现异步串行通信。系统选用TI公司的TMS320F2812为核心处理器,Samkoon-3.5A作为系统人机界面,介绍了DSP的SCI模块特点和Modbus通信协议,给出了程序流程图和硬件连接方式,编写了数据通信程序,最终实现数据通信。通过触摸屏进行显示和操作更加直观简单,节省装置空间和成本,为智能电子设备的开发提供了一种切实可行的方法。
With the development of smart grid, the power system puts forward new requirements for intelligent electronic devices. A method of communication between DSP and touch screen based on Modbus protocol is introduced to realize asynchronous serial communication. The system uses TI’s TMS320F2812 as the core processor, Samkoon-3.5A as the system man-machine interface, introduces the characteristics of SCI module of DSP and Modbus communication protocol, gives program flow chart and hardware connection, compiles data communication program, The ultimate realization of data communications. Through the touch screen for display and operation more intuitive and simple, saving installation space and cost, for the development of intelligent electronic devices provides a practical method.