iar6-3.c

手把手教你学AVR单片机C程序设计实验程序

#include<iom16.h>			
#define uchar unsigned char	
#define uint unsigned int
__flash uchar SEG7[16]={0x3f,0x06,0x5b,0x4f,0x66,
0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
//=============================
void delay_ms(uint k)			
{
    uint i,j;
    for(i=0;i<k;i++)
    {
       for(j=0;j<1140;j++);
    }
}
//=============================
void main(void)		
{					
uchar temp;	
DDRA=0xff;		
DDRC=0xff;		
DDRD=0x00;		
PORTA=0x00;		
PORTC=0xff;		
PORTD=0xff;	
   while(1)		
   {				
   	temp=~(PIND&0xf0);	
	temp=temp>>4;	
   	PORTA=SEG7[temp];
	PORTC=0xfe;
   	delay_ms(10);		
    }			
}