hal.c

来自「基于AVR的USB单片机的源代码,其中部分代码被用在产品上.」· C语言 代码 · 共 44 行

//===================================================================//
//					Augest, 25, 2002		The Last Modified Date
//                  Modified by Dai LiZHou, HIT ([e-mail])
//===================================================================//

#include "AvrUsb.H"

void outportb(unsigned int nPort, unsigned char nVal)
{
	volatile unsigned char *exAddress;
	exAddress =(volatile unsigned char  *) nPort;
	*exAddress = nVal;
}

unsigned char inportb(unsigned int nPort)
{
	unsigned char nVal;
    volatile unsigned char *exAddress;

	exAddress =(volatile unsigned char *) nPort;
	nVal = *exAddress;

	return nVal;
}

void Delay(unsigned char nFactor)
{
	unsigned char i,j;

	for(j=0;j<4;j++)
	   for(i=0; i<nFactor; i++)
		i=i;
}

void DelayMs(unsigned char nFactor)
{
	unsigned char i,j;

	for(j=0;j<4;j++)
   	   for(i=0; i<nFactor; i++)
		Delay(2);
}