这是程序演示如何使用触摸屏功能，上电后，显示校准界面，按下界面提示的校准点后，进入主界面。主界面会实时显示触笔的坐标。-Is this application demonstrates how to use the touch screen function, after power on, according to the calibration interface, press the screen tips after calibration point, enter the main i