usbhal.c

来自「smp860运动控制器USB驱动,对从事数控技术开发人员非常有用」· C语言 代码 · 共 31 行

/************************************************************************
 *File	: Usbhal.c				    									*
 *By 	: hugang, [e-mail]								*
 ************************************************************************/ 
#include "usb.h"

void outportb_D12(unsigned char port, unsigned char val)
{
	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--);
}

unsigned char inportb_D12(unsigned char port)
{
	unsigned char c;
	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--);

	return c;
}