// YsAT.h: interface for the CYsComm class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_YSAT_H__D43071E4_C7CF_11D5_971D_0050BADA81C3__INCLUDED_)
#define AFX_YSAT_H__D43071E4_C7CF_11D5_971D_0050BADA81C3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/****************************************************************
名稱:				重疊操作串口類
作者:				廣州暨南大學97計算機 姚舜
EMAIL:				ycatx@ycatx.net
創建時間:			2001.10.23
最近修改時間:		2003.5.21
功能:				對串口操作進行全面的封裝
等級:				☆☆☆☆☆
****************************************************************/

#define TYPE_READ		1
#define TYPE_WRITE		0
//#define BAUDRATE 1200//定義baudrate
//定義串口事件
#define WM_YSCOMM_MESSAGE WM_USER+2998
#define	WM_EV_BREAK		WM_USER+2999	//A break was detected on input. 
#define	WM_EV_CTS		WM_EV_BREAK+1	//The CTS (clear-to-send) signal changed state. 
#define	WM_EV_DSR		WM_EV_BREAK+2	//The DSR (data-set-ready) signal changed state. 
#define	WM_EV_ERR		WM_EV_BREAK+3	//A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY. 
#define	WM_EV_RING		WM_EV_BREAK+4	//A ring indicator was detected. 
#define	WM_EV_RLSD		WM_EV_BREAK+5	//The RLSD (receive-line-signal-detect) signal changed state. 
#define	WM_EV_RXCHAR	WM_EV_BREAK+6	//A character was received and placed in the input buffer. 
#define	WM_EV_RXFLAG	WM_EV_BREAK+7	//The event character was received and placed in the input buffer. The event character is specified in the device's DCB structure, which is applied to a serial port by using the SetCommState function. 
#define	WM_EV_TXEMPTY	WM_EV_BREAK+8	//The last character in the output buffer was sent. 


#define PURGE_ALL PURGE_TXABORT|PURGE_RXABORT|PURGE_TXCLEAR|PURGE_RXCLEAR
class CYsComm
{
private:
	BOOL m_bSemiduplex;
protected:
	OVERLAPPED	m_overlappedWrite;
	OVERLAPPED	m_overlappedRead;
	OVERLAPPED	m_overlappedEvent;
	HWND		m_hWnd;//用來接收消息的窗口
	HANDLE		m_hFileHandle;//存在comm句柄
	HANDLE		m_hStopReadEvent;
	HANDLE		m_hStopWriteEvent;
public:
	BOOL		IsConnect(){return m_hFileHandle!=NULL;}
	UINT		m_nPort;//端口號
	int			m_iBaud;
////////////////////
	BOOL StopRead();
	BOOL StopWrite();

	CYsComm();
	virtual ~CYsComm();

	BOOL Create(UINT port,BOOL bSemiduplex=0,HWND hWnd=NULL);
	void StopComm();//退出
//////Write & Read //////////////
	int ReadIn(PBYTE  lpszInputBuffer,
			DWORD dwNumberOfBytesToRead,
			DWORD dwReadTimeOut);//內部使用使用

	int ReadComm(PBYTE lpszInputBuffer,
			DWORD dwCountoByte,
			DWORD* dwHaveReaded,
			DWORD dwReadTimeOut);

	int ReadComm(PBYTE buffer,//緩沖區
			DWORD dwRead,//希望讀的長度
			LPDWORD pdwReaded,//讀到的長度
			DWORD dwStartTimeOut,//最大的開始讀數等待時間
			DWORD dwInterTimeOut//讀每個字符之間的等待時間
			);//讀出緩沖區里的數據

	int WriteComm(PBYTE lpszStringToWrite,
			DWORD dwNumberOfBytesToWrite);//寫操作
	
	BOOL Purge(DWORD nType);//清除串口

///////// State /////////

	//查詢緩沖區內的字符數
	//nType=1 表示查輸入緩沖區,nType=0表示輸出緩沖區
	BOOL GetBufferCount(int nType,LPDWORD lpNumberInBuffer);

	BOOL SetComm(int iBaud);//設置Comm口

////// Event Operation/////////////

	BOOL SetEvent(DWORD dwEvent);

	int WaitEvent(DWORD* pwdEvent,DWORD dwTimeOut);//設置并響應comm事件

	virtual BOOL DoStateEvent(DWORD dwEvent);//用來對串口事件進行處理
};

#endif // !defined(AFX_YSAT_H__D43071E4_C7CF_11D5_971D_0050BADA81C3__INCLUDED_)