delay.c

ATMEL AVR 单片机开发套件和大量C和ASM代码工程

#define xtal 8   
void delay_1ms(void)
{ unsigned int i;
 for(i=1;i<(unsigned int)(xtal*143-2);i++)
    ;
}
void delay_ms(unsigned int n)
{
 unsigned int i=0;
   while(i<n)
   {delay_1ms();
    i++;
   }
}
void delay_us(int time)
 {     
  do
	{
	time--;
	}	
  while (time>1);
 }