HMI串口触摸屏在单片机系统开发中的应用

Application Skills of HMI Serial Touch Screen in SCM System Development

HMI串口触摸屏的驱动程序比较复杂,是单片机系统开发的难点之一。通过对HMI串口触摸屏的硬件、接口协议以及编程原理的分析,选择触摸屏动态图像显示、曲线绘制以及文本动态定位显示为应用需求,提出了控件添加、图形化编程和单片机指令控制的方法。利用上位机与显示器同屏操作方法,降低了触摸屏的图形绘制、按键控制的编程难度,解决了现有触摸屏开发周期长、程序复杂、性能不稳定等问题。

The driver program of the touch screen is more complicated,which is one of the difficulties in the development of the single-chip microcomputer system.Through the analysis of the hardware,interface protocol and programming principle of HMI serial touch screen,the application requirements of dynamic image display,curve drawing and text dynamic positioning display on the touch screen are selected,and the definition,transmission and call of control variables based on control addition,graphical programming,and single-chip microcomputer program are proposed.The method,and the use of the same screen operation skills of the host computer and the display,reduces the difficulty of drawing graphics and key control programming of the touch screen,and solves the problems of long development cycle of the existing touch screen,complex procedures,and unstable performance.