8515fourportsledshift.~c

单片机开发资料光盘-双龙-686M.zip

#include <io8515.h>                     
#define BIT(x) (1<<(x))   
void delay(unsigned char delayValue)
{
 unsigned char i,j;
    for(i=0;i<delayValue;i++)
       for (j=1;j;j++)
           ;
}
void led_pb(unsigned char t)            
{
 unsigned char i;
 DDRB=0xff;                             
 for (i=0;i<8;i++)                       
   {
    PORTB=~BIT(i);                      
    delay(t);                           
   }
 PORTB=0xff;                            
}
void led_pd(unsigned char t)            
{
 unsigned char i;
 DDRD=0xff;
 for (i=0;i<8;i++)                      
    {
     PORTD=~BIT(i);
     delay(t);
    }
 PORTD=0xff;
}
void led_pc(unsigned char t)           
{
 unsigned char i;
 DDRC=0xff;
 for (i=0;i<8;i++)                     
   {
    PORTC=~BIT(i);
    delay(t);
   }
 PORTC=0xff;
}
void led_pa(unsigned char t)          
{
 unsigned char i;
 DDRA=0xff;
 for (i=8;i>0;i--)                    
   {
    PORTA=~BIT(i-1);
    delay(t);
   }
 PORTA=0xff;
}
void main (void)                      
{
 unsigned char dt;
 while (1)                            
     {
      for (dt=5;dt<200;dt+=25)
         {
          led_pb(dt);                 
          led_pd(dt);
          led_pc(dt);
          led_pa(dt);
         }
      }
}