tslib触摸屏校准源代码，校准触摸屏以获得正确的坐标值-tslib touch screen calibration source code, touch screen calibration in order to obtain the correct coordinate values

简单示例，利用QTcreator画圆，固定圆心，圆的半径、圆心可调节，并显示坐标-A simple example, the use of QTcreator Circle, a fixed center, the radius of the circle, the center can be adjusted, and the display coordinate

用ARM11控制GPS GPRS RFID 三个模块 实现读取 GPS信号传回的坐标值 并在谷歌地图上显示-Control with ARM11 GPS GPRS RFID three module reads the coordinate values ​ ​ of the GPS signal returned and displayed in Google Maps