Driver Design of Touch Screen Based on S3C2410 Embedded System

In order to meet the requirements of the good performance,stable operation,high precision for touch screen in the embedded system,a kind of driver design of touch screen in embedded system is put forward.The scheme is based on the S3C2410 microprocessor with touch screen hardware interface in embedded ucos operating system software implementation,using external transistor connected with the touch screen to the S3C2410 interface circuit.The designed driver can read out the voltage value of X-Y coordinates and control the touch-screen by using S3C2410's waiting interrupt mode and automatic X-Y coordinate conversion mode.The touch state detection and touch data conversion are completed efficiently.The realization method is simple and efficient,and is easily to be implemented.