1.实现中断嵌套 2.使用定时器4，采用中断方法实现RUN LED闪烁，频率为5hz， 3.使用外部中断0，控制RUN LED是否闪烁。-1. Achieve interrupt nested 2. Use timer 4, the interrupt method RUN LED flash, frequency for 5 hz, 3. Use external interruption 0, control whether RUN LED twinkle.

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

我们将使用低阶的波形声音API（即，前缀是waveOut的函数）来建立一个称作SINEWAVE的声音正弦波生成器。此程序以1 Hz的增量来生成从20Hz（人可感觉的最低值）到5,000Hz（与人感觉的最高值相差两个八度音阶）的正弦波。-We re going to use the low-level waveform audio APIs (that is, the functions beginning with the prefix waveOut) to create an audio s