定时器0.c.100827203408

来自「avr基础程序大全」· 100827203408 代码 · 共 55 行

#include <iom16v.h>
#include <macros.h>
#define  uchar unsigned char
#define  uint  unsigned int
uchar num=0;
#pragma interrupt_handler miao:9
#pragma data:code 
const  table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,
		           0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

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|=BIT(3);
	PORTB=table[j];
	PORTA&=~BIT(3);
	
	PORTB=0XFF;
	PORTB&=~BIT(k);
	PORTA|=BIT(4);
	PORTA&=~BIT(4);
	delay(1);
}
void miao()
{
    if(num==60)
	   num=0;
	 num++;
	TCNT1H=0X85;
	TCNT1L=0XED;  
}
void main()
{
    DDRB=0XFF;
	DDRA|=0X18;
	
	TCCR1B=0X04;
	TCNT1H=0X85;
	TCNT1L=0XED;
	TIMSK|=BIT(2);
	SREG|=BIT(7);
	
	while(1)
	{
	    show(num/10,0);
		show(num%10,1);
	}
}