基于C8051F SPI接口液晶触摸屏的控制设计

LCD touch-screen and its controller design based on C8051F021 SPI

本文简述了液晶触摸屏控制的工作原理,ADS7846触摸屏控制器与SPI接口与SED1335和单片机的接口电路,介绍了液晶触摸屏触点坐标的获取和实现及在液晶屏上换算的算法,并给出了采用单片机C8051F021控制LCD触摸屏的应用与SPI通讯的软件流程。

This article introduces the working principle of the LCD touch-screen ,the electric circuit diagram between SED1335 controller and C8051F021 as well as interface between ADS7846 controller and SPI, how the coordinates of the touching positions are converted on LCD screen is also presented. Additionally, this paper shows SPI communication software designing process of C8051F021' controlling over LCD touch-screen and its application.