定时器0._c

avr基础程序大全

#include <iom16v.h>
#include <macros.h>
#define  uchar unsigned char
#define  uint  unsigned int
uchar num=0;
#pragma interrupt_handler miao:9

uchar  const  table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,
		           0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar const LED_W[8] = {0,1,2,3,4,5,6,7};
void delay(uint ms)
{
        uint i,j;
	for(i=0;i<ms;i++)
	   {
	   for(j=0;j<1141;j++);
       }
}
void show(uchar j,uchar k)
{
      
	
		PORTA = table[j];		 // i 值的 个位数
		PORTC = LED_W[k];		 //点亮第一位数码管
		
		delay(2);
	
		/*j++;
		i++;
		if(j == 8)			 //利用 j 值的变化，来控制数码管数值变化间隔的时间
		{
			j = 0;
			i = 0;
		}*/
	
}
void miao()
{
    if(num==60)
	   num=0;
	 num++;
	TCNT1H=0X85;
	TCNT1L=0XED;  
}
void main()
{
    DDRA=0xff;	
	DDRC=0XFF;
	
	TCCR1B=0X04;
	TCNT1H=0X85;
	TCNT1L=0XED;
	TIMSK|=BIT(2);
	SREG|=BIT(7);
	
	while(1)
	{
	    show(num/10,1);
		show(num%10,0);
	}
}