触摸屏校准的思想及源代码，适合大多数使用的4线电阻式触摸屏。-touch screen calibration of thinking and the source code suitable for the majority of the use of 4-wire resistive touch screen.

常用的液晶电阻触摸屏驱动芯片，简单实用，成本很低！-Common LCD resistive touch screen driver chip, simple, practical, low cost!