lesson 4_1.c

来自「有51单片机C语言基础后在较短时间内学会51单片机C。」· C语言 代码 · 共 72 行

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
void delay(uint);
void initial();
sbit dula=P2^6;
sbit wela=P2^7;
uchar temp,num,t;    //定义全局变量
uchar code table[]={	//共阴极LED显示列表数据
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void main()
{
	t=0;num=1;
    initial();	  //中断初始化

	temp=0xfe;
	P1=temp;

	wela=1;		  //开机显示0
	P0=0xc0;
	wela=0;

	dula=1;
	P0=0x3f;
	dula=0;

    while(1)
	{
		temp=_crol_(temp,1);
		P1=temp;
		delay(500);
	}
}

void initial()
{
	TMOD=0x01;			//T0初始化
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;	
}

void T_0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	t++;
	if(t==20)
		{
		dula=1;
		P0=table[num];
		dula=0;
		t=0;
		num++;
		if(num>9)
		num=0;			
		}
}

void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=100;y>0;y--);
}