利用CSerialPort 类进行通信串口

示例代码：
打开串口
CSerialPort m_Port;  //CSerialPort类对象
if (m_Port.InitPort(this, m_nCom, m_nBaud,m_cParity,m_nDatabits,m_nStopbits,m_dwCommEvents,512))
{
m_Port.StartMonitoring();
m_ctrlIconOpenoff.SetIcon(m_hIconRed);
strStatus.Format("STATUS：COM%d OPENED，%d,%c,%d,%d",m_nCom, m_nBaud,m_cParity,m_nDatabits,m_nStopbits);
//"当前状态：串口打开，无奇偶校验，8数据位，1停止位");
}
else
{
AfxMessageBox("没有发现此串口或被占用");
m_ctrlIconOpenoff.SetIcon(m_hIconOff);
}
函数原型：
BOOL CSerialPort::InitPort(CWnd* pPortOwner,	// the owner (CWnd) of the port (receives message)
UINT  portnr,		// portnumber (1..4)
UINT  baud,			// baudrate
char  parity,		// parity
UINT  databits,		// databits
UINT  stopbits,		// stopbits
DWORD dwCommEvents,//EV_RXCHAR, EV_CTS etc
UINT  writebuffersize)	// size to the writebuffer
发送数据：
示例代码：
if(m_Port.m_hComm!=NULL)
{
m_Port.WriteToPort(data,len);
//m_Port.WriteToPort((LPCTSTR)m_strSendData);
}
函数原型：
void		WriteToPort(char* string);
void		WriteToPort(char* string,int n);
void		WriteToPort(LPCTSTR string);
void		WriteToPort(LPCTSTR string,int n);
接收数据：
//添加消息映射函数
ON_MESSAGE(WM_COMM_RXCHAR, OnCommunication)
//函数原型
LONG CSCommDlg::OnCommunication(WPARAM ch, LPARAM port)
ch是接受的字符,port是com口号
关闭串口
m_Port.ClosePort();