1.利用I/O口产生一定频率的方波
1.利用I/O口产生一定频率的方波，驱动蜂鸣器，发出不同的音调，从而演奏乐曲（最少三首乐曲，每首不少于30秒） 2．采用LCD显示信息 3．开机时有英文欢迎提示字符，播放时显示歌曲序号（或名称） 4．可通过功能键选择乐曲，暂停，播放。 5．选作内容：显示乐曲播放时间或剩余时间...
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I have a dream that I am always young. Then I will have enough energy to do everything whenever I want. Moreover, I don t have to worry about the old ...
本简易网络导纳分析仪以C8051F020为控制和数据处理核心
本简易网络导纳分析仪以C8051F020为控制和数据处理核心，由正弦信号发生器模块、滤波和功率放大模块、I/V变换模块、导纳角测量模块、导纳模测量模块、键盘模块以及液晶显示模块组成。采用数字控制DDS芯片AD9851产生100Hz－10KHz正弦信号，经滤波和功率放大后驱动网络负载。从网络负载中提取...
I use C to implement thread operating,include initiallize,fork,yield,exit,kill. You should have driv
I use C to implement thread operating,include initiallize,fork,yield,exit,kill. You should have driver to use this library. I choose array for ready q...
Welcome to the Wrox Press C++ tutorial "I hope you ll enjoy reading this tutorial with your portabl
Welcome to the Wrox Press C++ tutorial "I hope you ll enjoy reading this tutorial with your portable, your work, or your home PC. It s a perfect comp...
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