dtsm.c

用2*2矩阵键盘实现手动计数

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
#define	HI (65536-50000)/256
#define LO (65536-50000)%256
uchar table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar j,k;
sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit P23=P2^3;
sbit P24=P2^4;
sbit P25=P2^5;
void keyline_scan(void);
void delay(uint);
void delay10ms(uchar);
void display(void);
void main(void)
{
	TMOD=0x01;
	TH0=HI;
	TL0=LO;
	EA=1;
	ET0=1;
	TR0=1;	
	while(1)
	{
		display();
		keyline_scan();
	}
}
void keyline_scan(void)
{
	if(P20==0&&P22==0)
	{
		delay(1500);
		if(P20==1)
		{
			j++;	
			if(j==10)
			j=0;
		}
	}	
	if(P20==0&&P23==0)
	{
		delay(1500);
		if(P20==1)
		{
			k++;
			if(k==6)
			k=0;
		}
	}
	if(P21==0&&P22==0)
	{
		delay(1500);
		if(P21==1)
		{
			j--;
			if(j==0)
			j=10;
		}
	}
		if(P21==0&&P23==0)
	{
		delay(1500);
		if(P21==1)
		{
			k--;
			if(k==0)
			k=6;
		}
	}
}
void delay(uint t)
{
	uchar i;
	for(i=t;i>0;i--);
}
void display(void)
{
	P24=0;
	P1=table[j];delay(100);
	P24=1;
	P25=0;
	P1=table[k];delay(100);
	P25=1;	
}
void time0() interrupt 1
{
	uchar i;
	P22=0;
	P23=1;
	TH0=HI;
	TL0=LO;
	i++;
	if(i==5)
	{
		P22=~P22;
		P23=~P23;
		i=0;
	}
}