对串口通讯的封装(C++)

基于MFC的对串口通讯的封装

// SerialPort.h

 class CSerialPort
{
private:
 HANDLE m_hnd;
 void Init( int );

public:
 cSerialPort() : m_hnd(INVALID_HANDLE_VALUE) {}
 ~cSerialPort() { Close(); }
 BOOL Open( int, int=-1 );
 BOOL IsOpen() { return m_hnd!=INVALID_HANDLE_VALUE; }
 void Close();
 BOOL Send( char*, int );
 BOOL Receive( char*, int& );
};

// SerialPort.cpp

#include "stdafx.h"

BOOL CSerialPort::Open( int port, int baud )
{
 if( port < 0 || port > 8 )
  return FALSE;
 char buf[8];
 sprintf( buf, "COM%i", port );
 m_hnd=::CreateFile( buf, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL );
 if( m_hnd!=INVALID_HANDLE_VALUE )
  Init( baud );
 return m_hnd!=INVALID_HANDLE_VALUE;
}

void CSerialPort::Close()
{
 if( m_hnd!=IN