S3C2440A在步进电机控制器人机交互中的应用

为实现步进电机控制器系统升级,深入探讨了S3C2440A在步进电机控制器人机交互接口中的应用。S3C2440A内部具有专用的触摸屏接口和LCD控制器,可方便实现与触摸屏和LCD的无缝连接。在介绍步进电机控制器结构的基础上,给出了S3C2440A与触摸屏和LCD的接口电路,并对其应用程序设计进行了详细分析。通过等待中断模式和X/Y坐标连续转换模式的结合实现触摸屏触点信息的采集,并介绍了触摸屏的三点校正方法,最后给出了示例代码。以320×240TFT LCD为例,对LCD控制器的时序、缓冲区设置和显示数据格式进行了详细分析,同样给出了应用程序代码。最后,完成了系统运行实验。实验结果表明,S3C2440A与触摸屏和LCD接口方便,采用该结构可简化硬件系统设计,并减轻系统运行负荷。整个系统运行可靠。

Application of S3C2440A in human-computer interaction of stepping motor controller

In order to upgrade the stepping motor controller, the application of S3C2440A in human-computer interaction of stepping motor controller was discussed in detail. The special touch-screen interface and LCD controller in S3C2440A could connect with touch-screen and LCD directly. Based on introducing the architecture of stepping motor controller, circuits among S3C2440A, touch-screen and LCD were given, and related application programming design was analyzed deeply. The information of touched point on touch-screen was sampled by combining interrupting mode and X/Y coordinate sequential conversion mode, meanwhile three-points calibration method was introduced. At last, sampling codes were given. The scheduling, buffer setting and displaying data format of LCD controller were analyzed based on 320×240 TFT LCD. Also, the applied programming codes were given. At last, the above codes were executed in practical system. Result shows that connection between S3C2440A, touch screen and LCD is convenient. So the hardware-design and load of the system could be predigested with this architecture. This system runs well in the application.