利用动态扫描和定时器1在数码管上显示

出从765432开始以1/10秒的速度往下递减

直至765398并保持显示此数，与此同时利

用定时器0以500MS速度进行流水灯从上至

下移动，当数码管上数减到停止时，实验

板上流水灯也停止然后全部开始闪烁，3秒

后（用T0定时）流水灯全部关闭、数码管上

显示出"HELLO"。到此保持住。

设晶振频率为12MHz。-The use of dynamic scanning and Timer 1 in the digital display on the tube starting from 765 432 to 1/10 sec down and remain down until the 765 398 number displayed at the same time using Timer 0 to 500MS speed of light from water to next move, when the LED on the reduced number of stops, the experimental water board and then all the lights have stopped flashing, 3 seconds (timed with T0) water all the lights turned off, digital tube display " HELLO" . This hold. Let the crystal frequency is 12MHz.