内有几个自己所写的51单片机简单代码。包括定时器流水灯按键启停、定时器计数在数码管中显示按键启停、独立按键按要求点亮流水灯、外部中断流水灯触发蜂鸣器和数码管显示矩阵键盘按键等。适合新手学习51使用-There are several simple himself wrote 51 microcontroller code. Including start and stop the timer light water button, the timer counts in the digital