text1.c

来自「用c++语言编写的」· C语言 代码 · 共 44 行

#include <reg51.h>
#include <stdio.h>

#define DELAYTIME   5000 //定义延迟时间常数

//定义bit 类型的变量
sbit p10=P1^0;
sbit p11=P1^1;

void delay(unsigned int temp)//延时程序
{
  while(--temp);
}

void main()
{

        P2=255;//led is off
        while(1)
		{
            if(p10==0) //判断P1.0是否按下
			{ 
				P2=0X7F;
				delay(DELAYTIME);
				 while(P2)
			 {
				P2=P2/2;
				delay(DELAYTIME);
			 }
			}
			if(p11==0)//判断P1.1是否按下
			{
				P2=0X3F;
				delay(DELAYTIME);
				P2=0XCF;
				delay(DELAYTIME);
				P2=0XF3;
			 	delay(DELAYTIME);
				P2=0XFC;
				delay(DELAYTIME);
			 }
			
		}
}