/*
Comm Base Library(WIN98/NT/2000) ver 1.1
Compile by： BC++ 5; C++ BUILDER 4, 5, 6, X; VC++ 5, 6; VC.NET; GCC;
copyright(c) 2004.5 - 2005.8 llbird wushaojian@21cn.com
*/ 
#ifndef _CN_COMM_H_
#define _CN_COMM_H_
#pragma warning(disable: 4530)
#pragma warning(disable: 4786)
#pragma warning(disable: 4800)
#include <assert.h>
#include <stdio.h>
#include <windows.h>
//送到窗口的消息 WPARAM 端口號
#define ON_COM_RECEIVE WM_USER + 618
#define ON_COM_CTS WM_USER + 619 //LPARAM 1 valid
#define ON_COM_DSR WM_USER + 621 //LPARAM 1 valid
#define ON_COM_RING WM_USER + 623
#define ON_COM_RLSD WM_USER + 624
#define ON_COM_BREAK WM_USER + 625
#define ON_COM_TXEMPTY WM_USER + 626
#define ON_COM_ERROR WM_USER + 627 //LPARAM save Error ID
#define DEFAULT_COM_MASK_EVENT EV_RXCHAR | EV_ERR | EV_CTS | EV_DSR | EV_BREAK | EV_TXEMPTY | EV_RING | EV_RLSD
#define  XON   0x11
#define  XOFF  0x13

class cnComm
{
public:
	//------------------------------Construction-----------------------------------
	//第1個參數為是否在打開串口時啟動監視線程， 第2個參數為IO方式 阻塞方式（0）/ 異步重疊方式（默認）
	cnComm(bool fAutoBeginThread = true, DWORD dwIOMode =
		FILE_FLAG_OVERLAPPED): _dwIOMode(dwIOMode), _fAutoBeginThread(fAutoBeginThread)
{
	Init();
}
virtual ~cnComm()
{
	Close();
	UnInit();
}
//----------------------------------Attributes----------------------------------
//判斷串口是否打開
inline bool IsOpen()
{
	return _hCommHandle != INVALID_HANDLE_VALUE;
}
//判斷串口是否打開
operator bool()
{
	return _hCommHandle != INVALID_HANDLE_VALUE;
}
//獲得串口句炳
inline HANDLE GetHandle()
{
	return _hCommHandle;
}
//獲得串口句炳
operator HANDLE()
{
	return _hCommHandle;
}
//獲得串口參數 DCB
DCB *GetState()
{
	return IsOpen() && ::GetCommState(_hCommHandle, &_DCB) == TRUE ?
		&_DCB: NULL;
}
//設置串口參數 DCB
bool SetState(DCB *pdcb = NULL)
{
	return IsOpen() ? ::SetCommState(_hCommHandle, pdcb == NULL ? &_DCB:pdcb) == TRUE: false;
}
//設置串口參數：波特率，停止位，等 支持設置字符串 "9600, 8, n, 1"
bool SetState(char *szSetStr)
{
	if (IsOpen())
	{
		if (::GetCommState(_hCommHandle, &_DCB) != TRUE)
			return false;
		if (::BuildCommDCB(szSetStr, &_DCB) != TRUE)
			return false;
		return ::SetCommState(_hCommHandle, &_DCB) == TRUE;
	}
	return false;
}
//設置串口參數：波特率，停止位，等
bool SetState(DWORD dwBaudRate, DWORD dwByteSize = 8, DWORD dwParity =
			  NOPARITY, DWORD dwStopBits = ONESTOPBIT)
{
	if (IsOpen())
	{
		if (::GetCommState(_hCommHandle, &_DCB) != TRUE)
			return false;
		_DCB.BaudRate = dwBaudRate;
		_DCB.ByteSize = (unsigned char)dwByteSize;
		_DCB.Parity = (unsigned char)dwParity;
		_DCB.StopBits = (unsigned char)dwStopBits;
		return ::SetCommState(_hCommHandle, &_DCB) == TRUE;
	}
	return false;
}
//獲得超時結構
LPCOMMTIMEOUTS GetTimeouts(void)
{
	return IsOpen() && ::GetCommTimeouts(_hCommHandle, &_CO) == TRUE ?
		&_CO: NULL;
}
//設置超時
bool SetTimeouts(LPCOMMTIMEOUTS lpCO)
{
    return IsOpen() ? ::SetCommTimeouts(_hCommHandle, lpCO) == TRUE:false;
}
//設置串口的I/O緩沖區大