delay.c

lcd液晶驱动显示原代码 根据硬件自己修改

/*---------------------------------------延时函数-------------------------------------*/ 

/*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
void delay_1us(void)                 //1us延时函数
  {
   asm("nop");
  }

void delay_nus(unsigned int n)       //N us延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1us();
  }

void delay_1ms(void )  //延时1ms 
{ 
   unsigned int i ; 
   unsigned char xtal; 
   xtal=4; 
   for (i=1;i<(xtal*143-2);i++) 
   { 
    ; 
   }    
} 

void delay_nms(unsigned int n)  //延时nms 
{ 
   unsigned int i=0 ;  
   for(i=0;i<n;i++) 
   { 
    delay_1ms();  
   } 
}