数码管按键移动位数闪烁实验

2015-06-23 来源：51hei

#include

#define uchar unsigned char
#define uint unsigned int

sbit k1=P1^0;

void delay(uint k)
{
while(k--);

}

code uchar seg[]={0x28,0x7e,0xa2,0x62,0x74,0x61,0x21,0x7a,0x20,0x60}; //数码管码表
code uchar tab[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe}; //数码管位选

uchar move,flag;

void time0_init()
{
TMOD=0x01;
TH0=0x00;
TL0=0x00;
TR0=1;
}

void str_init() //中断初始化
{
EA=1;
ET0=1;
}

void time0_event() interrupt 1 //中断事件
{
static uchar i;
i++;
if(i==15)
{
flag=~flag;i=0;
}
}

void show()
{
uchar i;
for(i=0;i<4;i++)
{
   if(i==move)
   {
   P0=seg[i]|(0xdf&flag);
   }
   else
   {
   P0=seg[i];
   }
   P2=tab[i];
   delay(100);
   P0=0xff;
   P2=0xff;
}
}

void key()
{
static uchar i,j;
if(k1==0)
{
   if(i==0)
   {
j++;
if(j>10)
{
   if(k1==0)
   {
    i=1;j=0;
    move++;
    if(move==4)move=0;
   }
}
}
}
else
{
i=0;
j=0;
}
}

void main()
{
time0_init();
str_init();
while(1)
{
key();
show();
}

}

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