基于ARM嵌入式触摸屏的设计与研究

Design of the Embedded Touch-screen Based on ARM

通过对触摸屏及控制器ADS7843工作原理的分析以及与ARM7微处理器LPC2387硬件连接的研究,设计出两种不同的触摸屏控制方式,并给出必要的软件编程及相关的触摸屏逻辑坐标与LCD物理坐标的转换公式.实验表明,Microwire总线控制方式反应更灵敏、人机交互能力更强.

Based on the study and analysis of ADS 7843 touchscreen controller working principle and the hardware connections with LPC 2387,two different kinds of touch-screen control were designed,and a necessary software were given.The formula transformation between logical coordinates of touch-screen and physical coordinates of LCD was also given.The experiment results showed that the bus control of Microwire is more sensitive to response and more capable of human-computer exchange.