mydelay.h

诺基亚3310手机液晶屏驱动程序

   /*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
/*key words

void DelayMs(unsigned int );
void Delay(Unsigned int );

*/

#ifndef _mydelay_H_
#define _mydelay_H_

#include <avr/delay.h>

#define FEQ 8    //系统时钟8MHz


void DelayMs(unsigned int t)
{
	unsigned int i;
	for(i=0;i<t;i++)
		_delay_loop_2(FEQ * 250 );
}



   /*-----------------------------------------------------------------------
软延时延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
void delay_1us(void)                 //1us延时函数
  {
   asm("nop");
  // _delay_loop_2(250);//4
  
  }

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)                 //1ms延时函数
  {
   unsigned int i;
   for (i=0;i<1140;i++);
  }
  
void delay_nms(unsigned int n)       //N ms延时函数
{
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
}
void delay_s(unsigned int n)
{
   unsigned int i=0;
   for(i=0;i<n;i++)
       delay_nms(1000);
}  
void delay(unsigned int n)       //N ms延时函数
{
  delay_nms(n);
}

//******结束 

/*
void Delay(unsigned int t)
{
   unsigned int i;
   while( (t--)!=0 )
	{
		for(i=0;i<125;i++)
		{
			;
		}
	}	
} 

*/

   /*-----------------------------------------------------------------------
软延时延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
/*
void delay_1us(void)                 //1us延时函数
  {
   _delay_loop_2(255);//4
  }

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)                 //1ms延时函数
  {
   unsigned int i;
   for (i=0;i<1140;i++);
  }
  
void delay_nms(unsigned int n)       //N ms延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }
void delay(unsigned int n)
{
   unsigned int i=0;
   for(i=0;i<n;i++)
       delay_nms(i);
}  
//-----结束  
*/

#endif