#ifndef __DppComm_H__INCLUDED_
#define __DppComm_H__INCLUDED_
#define WM_DPPCOMM_RCV_CHAR (WM_USER + 400)
#define EV_THREAD_EXIT_EVENT 0
#define EV_READ_STATUS_EVENT 1
#define EV_WRITE_DATA_EVENT 2

static size_t m_SendBytes;
static BOOL ExitEvent;

class CDppComm
{										
public:
	CDppComm();
	virtual ~CDppComm();
	BOOL Settings(CWnd* hPortWnd, UINT PortID = 1, UINT BaudRate = 115200, char Parity = 'N', UINT DataBits = 8, UINT StopBits = 1, DWORD dwCommEvents = EV_RXCHAR, UINT nBufferSize = 1024);
	BOOL OpenPort();
	BOOL ClosePort();
	BOOL IsPortOpen();
	UINT GetComPortID();
	void WriteData(unsigned char* string, size_t NumBytes);
	bool SendPacketRS232(unsigned char Buffer[], CDppComm *CommPort);

protected:
	void GetCommErrStr(char* ErrorText);
	static UINT	DppCommThread(LPVOID pParam);
	static void	ReceiveByte(CDppComm* port, COMSTAT comStat);
	static void	WriteByte(CDppComm* port);
	CWinThread* m_WinThread;
	CRITICAL_SECTION m_csCommunicationSync;
	BOOL m_bThreadRunning;
	HANDLE ghThreadExitEvent;
	HANDLE m_hDppComm;
	HANDLE m_hWriteEvent;
	HANDLE m_hEvents[3];
	OVERLAPPED osIO;			// overlapped structure for asynchronous IO
	COMMTIMEOUTS m_CommTimeouts;
	DCB m_dcb;
	CWnd* m_pOwner;
	unsigned char* m_szWriteBuffer;
	DWORD m_dwCommEvents;
	DWORD m_nWriteBufferSize;
	UINT PortIDSetting;
	BOOL PortIsOpen;

};

#endif __DppComm_H__INCLUDED_