usb2com.const.h

这是一个关于USB转接串口的驱动程序开发

//********************************************************************
//	created:	11:7:2008   21:16
//	file:		usb2com.const.h
//	author:		tiamo
//	purpose:	const
//********************************************************************

#pragma once

//
// Reasons that recption may be held up.
//

#define SERIAL_RX_DTR									0x01
#define SERIAL_RX_XOFF									0x02
#define SERIAL_RX_RTS									0x04
#define SERIAL_RX_DSR									0x08

//
// Reasons that transmission may be held up.
//
#define SERIAL_TX_CTS									0x01
#define SERIAL_TX_DSR									0x02
#define SERIAL_TX_DCD									0x04
#define SERIAL_TX_XOFF									0x08
#define SERIAL_TX_BREAK									0x10

#define try_leave(S)									{S;__leave;}