基于Cortex-M3的低成本液晶触摸屏设计

摘要

选用NXP公司内置LCD控制器的Cortex-M3处理器LPC1788作为主控，设计了一种低成本的液晶触摸屏。介绍了四线电阻式触摸屏与LPC1788的接口设计，移植emWin图形界面库为GUI提供支持。实际运用证明，低成本液晶触摸屏运行稳定，界面设计便捷。%This paper provides a Iow-cost LCD Touch Screen design which use LPC1788 as the processor.LPC1788 which is de-signed by NXP,is a SoC based on Cortex-M3 CPU and contains a buiId-in LCD controI er,and introduces the interface of 4-wire resistive touch pad with LPC1788.In addition,transpIant the graphicaI interface Iibrary emWin to provide best support for the design of GUI.The practicaI appIication shows this screen works stabIy and makes the interface design convenient.