zhongduan.c

avr单片机中断test程序,详细说明 含工程文件

#include <avr/io.h> 
#define  	uchar	unsigned char

#define 	uint	unsigned int
unsigned char countnum[4]={0,0,0,0};
unsigned char a=0;
unsigned const char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};



#pragma interrupt_handler int_0:2
unsigned char int_0()
{
a++;
}




	 
/****************************************
*  函数名称: void delay_ms(uint i)		*
*  函数功能：延时函数			 		*
*  晶振频率：7.3728MHZ					*
*  入口参数：i mS						*
****************************************/
void delay_us(unsigned int i)
	{
	while(i--)
	 	{
		asm("nop");
		asm("nop");
		}
	}
	 
/****************************************
*  函数名称: void delay_ms(uint i)		*
*  函数功能：延时函数			 		*
*  晶振频率：7.3728MHZ					*
*  入口参数：i mS						*
****************************************/
void delay_ms(unsigned int i)
	{
	unsigned int a;
	for(;i;i--)
		{
		for(a=570;a;a--)
			{;}
		}
	}

//显示函数
void led(void)
{
    unsigned char i;
    static unsigned char lednum[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x3f};
    //unsigned char countnum[4]={0,0,0,0};
    DDRB=0xff;
    PORTB=0xff;
    DDRD=0x0f;
    PORTD=0x0ff;
//显示计数值
   for(i=0;i<4;i++)
   {
       PORTD&=~(1<<i);
	   if(2==i)
	      PORTB=lednum[countnum[i]]+0x80;
		  else
		      PORTB=lednum[countnum[i]];
          delay_ms(1);
		  PORTD|=0xff;
      }

       //if(countnum[0]==9 && countnum[1]==9 && countnum[2]==9 && countnum[3]==9)
       //  break;
  // }
  //}
}

void main(void)
{

   SREG=0X80;
   GIMSK=0X40;
   MCUCR=0X02;
   DDRA=0;
   DDRB=0XFF;
   while(1)
   {
PORTA=table[a];
   ;
   }
}