如何使用MScomm控件

1:如果添加MSComm控件?

见:http://blog.csdn.net/flydream0/article/details/8002012

 

2:为对话框添加MSComm控件成员变量

右击MSComm控件，然后选择Add Variable...

 

3:为对话框添加OnComm事件

右击MSComm控件，然后选择Add Event Handle..

 

4:打开/关闭串口.

void Ctbox_debug_viewDlg::OnBnClickedBtOpen()
{
// TODO: Add your control notification handler code here

if(m_mscomm.get_PortOpen())
{
m_mscomm.put_PortOpen(FALSE);
GetDlgItem(IDC_BT_OPEN)->SetWindowText(_T("打开"));
ShowInfo(_T("关闭串口成功!"));
m_OpenStatus =false;
return;
}
UpdateData(TRUE);
m_OpenStatus =true;
//当前端口号
m_mscomm.put_CommPort(m_Port+1);//端口号
m_mscomm.put_InBufferSize(1024);//接收缓冲区 
m_mscomm.put_OutBufferSize(1024);//发送缓冲区 

m_mscomm.put_InputLen(0);//设置当前接收区数据长度为0，表示全部读取   
m_mscomm.put_InputMode(1);//以二进制方式读写数据   
m_mscomm.put_RThreshold(1);//接收缓冲区有1个及1个以上字符时，将引发接收数据的OnComm事件   



//波特率
DWORD baudrate;
switch(m_CombolBaudrate.GetCurSel())
{
case 0:
baudrate =115200;
break;
case 1:
baudrate =9600;
break;
default:
ASSERT(FALSE);
break;
}
CString setting;
setting.Format(_T("%d,n,8,1"),baudrate);
m_mscomm.put_Settings(setting/*_T("115200,n,8,1")*/);//波特率，无校验，8个数据位，1个停止1位

m_mscomm.put_PortOpen(TRUE);//打开串口  
GetDlgItem(IDC_BT_OPEN)->SetWindowText(_T("关闭"));
ShowInfo(_T("打开串口成功!"));

}

5:接收串口数据

void Ctbox_debug_viewDlg::OnCommMscomm1()
{
// TODO: Add your message handler code here
short curEvent =m_mscomm.get_CommEvent();
switch(curEvent)
{
case CMscomm1::comEvReceive:
EvReceiveHandle();
break;
}

}

void Ctbox_debug_viewDlg::EvReceiveHandle(void){static unsigned int cnt=0;  VARIANT variant_inp;  COleSafeArray safearray_inp;  long len,k;  /*unsigned intdata[1024]={0};*/  BYTE rxdata[1024];//设置BYTE数组CString strtemp; cnt++;  variant_inp= m_mscomm.get_Input();//读取缓冲区   safearray_inp= variant_inp;//变量转换   len= safearray_inp.GetOneDimSize();//得到有效的数据长度   for (k=0;k<len;k++)  {  safearray_inp.GetElement(&k,rxdata+k);  }  /*char c_char; */ for (k=0;k<len;k++)  {  strtemp.Format(_T("%c"),*(rxdata+k));m_RecveString +=strtemp; if(*(rxdata+k) =='\n'){ShowInfoByFilter(m_RecveString);m_RecveString ="";}}}

6:发送串口数据

void Ctbox_debug_viewDlg::OnBnClickedBtSend()
{
// TODO: Add your control notification handler code here
if(m_OpenStatus ==false)
{
AfxMessageBox(_T("请先打开串口"));
return;
}
UpdateData(TRUE);
if(m_SendString.IsEmpty())
return;
if(m_AutoAddLF)
{
m_SendString +="\r\n";
}
m_mscomm.put_Output(COleVariant(m_SendString));
ShowInfo(m_SendString);
}