说明：  本实验将介绍如何创建一个简单的 Qtopia2.2.0 程序，并将其集成到 Qtopia2.2.0 中，我们将以 PWM控制蜂鸣器作为例子，演示开发一个 Qtopia2.2.0 应用程序的完整步骤，包括使用 designer 设计图形程序界面、交叉编译 arm 版本的程序等等。
(This experiment will introduce how to create a simple Qtopia2.2.0 program, and integrated into the Qtopia2.2.0, we will take PWM as an example to control the buzzer, complete the steps to demonstrate the development of a Qtopia2.2.0 application, including the use of designer design of graphical programming interface, cross compile the arm version of the program.)