两键控制8盏LED灯实现不同周期的闪烁.doc

考试题目：编写灯闪烁程序：当key1键按下时灯以T=500ms闪烁；当key2键按下时灯以T=1s闪烁。#include reg51.h sbit P1_0=P10;sbit P1_1=P11;unsigned char i,j,temp;keyscan1() TMOD=0x11; /*用定时/计数器0定时10ms*/TH0=(65535-10000)/256;TL0=(65535-10000)%256; /*TH1=0xD8;TL1=0xF0*/EA=1; ET0=1; TR0=1; i=0;keyscan2() TMOD=0x11; /*用定时/计数器1也定时10ms*/TH1=(65535-10000)/256;TL1=(65535-10000)%256; /*TH1=0xD8;TL1=0xF0*/EA=1; ET1=1; TR1=1; j=0;voi