lesson 4_2.c

有51单片机C语言基础后在较短时间内学会51单片机C。

#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_d,num_w,t;    //定义全局变量
uchar code table_d[]={	//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};
uchar code table_w[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
void main()
{
	t=0;num_d=1;num_w=0;
    initial();	  //中断初始化

	temp=0xfe;
	P1=temp;

    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==10)
		{
		t=0;
		dula=1;
		P0=table_d[num_d];
		dula=0;
		num_d++;
		if(num_d==7)
		num_d=1;
		
		wela=1;
		P0=table_w[num_w];
		wela=0;
		num_w++;
		if(num_w==6)
			num_w=0;					
		}
}

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