89c52smg.txt

用定时器以间隔500MS在6位数码管上依次显示0、1、2、3….C、D、E、F

#include <reg52.h>

#define uint unsigned int
#define uchar unsigned char

sbit ledlk=P1^0;
sbit smglk=P1^1;
sbit smgbitlk=P1^2;
sbit beep=P2^6;
sbit jdq=P2^7;

void deplay(uint ms)
{
	uint i,j;
	for(i=0;i<ms;i++)
		for(j=120;j>0;j--);
}

uchar code table[]={0x3f  , 0x06 , 0x5b , 0x4f , 0x66 , 0x6d ,0x7d , 0x07 , 0x7f  , 
					0x6f , 0x77 , 0x7c ,0x39 , 0x5e , 0x79 , 0x71 , 0x00};

void showsmg(uchar smg,uchar value)
{	
	uchar code tablesmg[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
		smglk=1;
		P2=tablesmg[smg];
		smglk=0;
		smgbitlk=1;
		P2=table[value];
		smgbitlk=0;
		deplay(3);
}

uchar s=0;

void main()
{
	uint i=0;
	ledlk=0;
	smglk=1;
	P2=0xc0;
	smglk=0;
	smgbitlk=1;
	P2=table[0];
	EA=1;
	ET0=1;
	TR0=1;
	TF0=1;
	TMOD=0xf1;
	TH0=(65535-54250)/256;
	TL0=(65535-54250)%256;
	while(1)
	{
		if(s==10)
		{	
			s=0;
			i++;
			if(i==16) i=0;
			P2=table[i];
		}
	}	
}

void intermit() interrupt 1  // 中断
{
	s++;
	TH0=(65535-54250)/256;
	TL0=(65535-54250)%256;	
}