99count.c

0-99的计数器

#include <iom128v.h>
#define uchar unsigned char
#define uint unsigned int
const uchar table[ ] ={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//0-9十个数字
uchar led[2] ;
uint count=99;
void delay_1ms(void)      //延时1ms程序          
  {
   unsigned int i;
   for (i=0;i<1140;i++);
  }
  
void delay_nms(unsigned int n)   //延时nms程序    
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }
void init_disp(void) 
{
DDRA=0xFF;//A口为输出
DDRC=0x30;//数码管第一个输出
}
void disp(void)
{
uchar i;
for (i=0;i<4;i++)
{
PORTC=~(0x01<<(i+4));
PORTA=table[led[i]];
delay_nms(8);
}
}
void conv(void)  //把各个位上的值算出来
{
led[1] =count/10%10;
led[0] =count%10;
}
void main(void)
{
init_disp();
count=0;
conv();
for(;;)
{count=count;
count--;
while((PIND&0x01)==0)
{
disp();
}
conv();
disp();
while(count==0)
count=99;
}
}