usbhal.c

开发环境ADS 通过编写一段程序使PC机与实验箱的从USB相连接。连接的时候

/************************************************************************
 *File	: Usbhal.c															*
 *By 	: hugang, [e-mail]								*
 ************************************************************************/ 

#include "armusb.h"
#include "..\inc\44b.h"

void outportb(unsigned char port, unsigned char val)
{
#ifdef JINGZHUANG
	if(port) USB_D12_COMMAND;		// 若为命令采用奇地址
	else USB_D12_DATA;				// 若为数据采用偶地址
	
	USB_D12_PORT = val;
#else
	unsigned char i;
	
	if(port) USB_D12_CMDPROT = val;
	else USB_D12_DATAPROT = val;

	i = 5;							//延时，使得读写周期大于500ns
	while(i--);
#endif
}

unsigned char inportb(unsigned char port)
{
	unsigned char c;
#ifdef JINGZHUANG	
	if(port) USB_D12_COMMAND;		// 若为命令采用奇地址
	else USB_D12_DATA;				// 若为数据采用偶地址
	
	c = USB_D12_PORT;
#else
	unsigned char i;

	if(port) c = USB_D12_CMDPROT;
	else c = USB_D12_DATAPROT;

	i = 5;							//延时，使得读写周期大于500ns
	while(i--);
#endif
	return c;
}