MSComm写串口通信驱动步骤

1、在OnInitDialog()中添加初始化代码

BOOL CSCommTestDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// TODO: 在此添加额外的初始化代码
	m_ctrlComm.put_CommPort(1);
	m_ctrlComm.put_InBufferSize(1024);
	m_ctrlComm.put_OutBufferSize(512);

	m_ctrlComm.put_Settings(_T("9600, n, 8, 1"));

	if (!m_ctrlComm.get_PortOpen())
		m_ctrlComm.put_PortOpen(TRUE);

	m_ctrlComm.put_RThreshold(1);
	m_ctrlComm.put_InputLen(0);
	m_ctrlComm.get_Input();

	return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE
}

2、在OnCommMscomm1中添加接收代码

void CSCommTestDlg::OnCommMscomm1()
{
	// TODO: 在此处添加消息处理程序代码
	VARIANT variant_inp;

	CString strtemp;
	if (m_ctrlComm.get_CommEvent() == 2) 
	{
		variant_inp = m_ctrlComm.get_Input();
		strtemp = variant_inp;
		m_strEditRxData += strtemp;
	}

	UpdateData(FALSE);
}

3、在OnBnClickedButtonMunualsend()中添加发送代码

 

void CSCommTestDlg::OnBnClickedButtonMunualsend()
{
	// TODO: 在此添加控件通知处理程序代码
	UpdateData(TRUE);
	m_ctrlComm.put_Output(COleVariant(m_strEditTxData));
}