lesson 5_1.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
uchar temp,t0,t1,a1,a2,a3,bai,shi,ge,i;
uint shu;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
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 initial();
void delay(uint z);
void display(uchar a1,uchar a2,uchar a3,uchar bai,uchar shi,uchar ge);
void main()
{
    initial();
	while(1)
	{
		display(7,6,5,bai,shi,ge);
	}
}

void initial()
{
    t0=0;
	shu=432;
	temp=0xfe;
	P1=temp;

	TCON=0x11;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	ET0=1;
	TR0=1;

	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	ET1=1;
	TR1=1;

	EA=1;
}

void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	t0++;
	if(t0==10)
	{
		t0=0;
		temp=_crol_(temp,1);
		P1=temp;
	}	
}

void timer1() interrupt 3
{
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	t1++;
	if(t1==2)
	{
		t1=0;
		shu--;
		bai=shu/100;
		shi=shu%100/10;
		ge=shu%10;
		if(shu==389)
		{
			TR0=0;
			TR1=1;		
		}
			
	}	
}

void display(uchar a1,uchar a2,uchar a3,uchar bai,uchar shi,uchar ge)
{		for(i=0;i<6;i++)
		{
        dula=1;
		if(i==0)  P0=table[ge];
		if(i==1)  P0=table[shi];
		if(i==2)  P0=table[bai];
		if(i==3)  P0=table[a3];
		if(i==4)  P0=table[a2];
		if(i==5)  P0=table[a1];
		dula=0;
		P0=0xff;	//消隐
		wela=1;
		P0=table_w[i];
		wela=0;
		delay(3);
		}
}
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}