#ifndef __SERIALPORT_H__
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#define __SERIALPORT_H__
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#define WM_COMM_BREAK_DETECTED WM_USER+1 // A break was detected on input.
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#define WM_COMM_CTS_DETECTED WM_USER+2 // The CTS (clear-to-send) signal changed state.
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#define WM_COMM_DSR_DETECTED WM_USER+3 // The DSR (data-set-ready) signal changed state.
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#define WM_COMM_ERR_DETECTED WM_USER+4 // A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY.
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#define WM_COMM_RING_DETECTED WM_USER+5 // A ring indicator was detected.
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#define WM_COMM_RLSD_DETECTED WM_USER+6 // The RLSD (receive-line-signal-detect) signal changed state.
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#define WM_COMM_RXCHAR WM_USER+7 // A character was received and placed in the input buffer.
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#define WM_COMM_RXFLAG_DETECTED WM_USER+8 // The event character was received and placed in the input buffer.
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#define WM_COMM_TXEMPTY_DETECTED WM_USER+9 // The last character in the output buffer was sent.
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class CSerialPort
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{
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public:
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// contruction and destruction
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CSerialPort();
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virtual ~CSerialPort();
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// port initialisation
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BOOL InitPort(CWnd* pPortOwner, UINT portnr = 1, UINT baud = 19200, char parity = 'N', UINT databits = 8, UINT stopsbits = 1, DWORD dwCommEvents = EV_RXCHAR | EV_CTS, UINT nBufferSize = 512);
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// start/stop comm watching
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BOOL StartMonitoring();
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BOOL RestartMonitoring();
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BOOL StopMonitoring();
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DWORD GetWriteBufferSize();
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DWORD GetCommEvents();
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DCB GetDCB();
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void WriteToPort(unsigned char* Data, UINT size);
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void ClearReadBuff(void);
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BOOL m_ReadComplete;
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unsigned char m_ReadBuff[256];
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int m_ReadCount;
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BOOL m_bThreadRun;
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protected:
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// protected memberfunctions
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void ProcessErrorMessage(char* ErrorText);
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static UINT CommThread(LPVOID pParam);
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static void ReceiveChar(CSerialPort* port, COMSTAT comstat);
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static void WriteChar(CSerialPort* port);
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// thread
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CWinThread* m_Thread;
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// synchronisation objects
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CRITICAL_SECTION m_csCommunicationSync;
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BOOL m_bThreadAlive;
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// handles
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HANDLE m_hShutdownEvent;
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HANDLE m_hComm;
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HANDLE m_hWriteEvent;
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// Event array.
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// One element is used for each event. There are two event handles for each port.
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// A Write event and a receive character event which is located in the overlapped structure (m_ov.hEvent).
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// There is a general shutdown when the port is closed.
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HANDLE m_hEventArray[3];
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// structures
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OVERLAPPED m_ov;
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COMMTIMEOUTS m_CommTimeouts;
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DCB m_dcb;
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// misc
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UINT m_nPortNr;
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unsigned char* m_szWriteBuffer;
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DWORD m_dwCommEvents;
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DWORD m_nWriteBufferSize;
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UINT m_WriteDataSize;
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};
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#endif __SERIALPORT_H__
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