串口上位机程序编写

借助开源文件：Com_class.h

程序实例：http://pan.baidu.com/s/1qWHUQmS

使用步骤：  1.包含Com_class.h头文件

2.

#include "Com_class.h"
class CComDlgDlg : public CDialog
{
// Construction
public:
	LRESULT On_Receive(WPARAM wp, LPARAM lp);
	_thread_com com2;
	CComDlgDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	//{{AFX_DATA(CComDlgDlg)
	enum { IDD = IDD_COMDLG_DIALOG };
	CString	m_e;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CComDlgDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CComDlgDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	virtual void OnOK();
	afx_msg void OnButton1();
	afx_msg void OnButton2();
	afx_msg void OnButton3();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_COMDLGDLG_H__75BDFED3_C096_4C40_AB56_E631ECD7434D__INCLUDED_)

　　3.添加消息映射

BEGIN_MESSAGE_MAP(CComDlgDlg, CDialog)
    //{{AFX_MSG_MAP(CComDlgDlg)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
    ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
    ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
    //}}AFX_MSG_MAP
    ON_MESSAGE(ON_COM_RECEIVE, On_Receive)
END_MESSAGE_MAP()

4.添加重载函数

LRESULT CComDlgDlg::On_Receive(WPARAM wp, LPARAM lp)
{
    int len;
    char str[100];
    len = com2.read(str, 100);
    if(len > 0)
    {
        char com_str[10];
        strcpy(com_str, "COM");
        ltoa((long)wp, com_str + 3, 10); //    WPARAM 保存端口号
        m_e += com_str;
        m_e += " : ";
        m_e += str;
        m_e += "\r\n";
        UpdateData(false);
    }

    return 0;
}

5.打开串口

void CComDlgDlg::OnButton1()
{
    if(!com2.open(5))//默认是9600 调用不同的OPEN可以调节波特率
        MessageBox("open fail", "COM5", MB_OK);
    else
        com2.set_hwnd(m_hWnd);

}

6.发送数据

void CComDlgDlg::OnButton3()
{
    char  buff[100];
    // TODO: Add your control notification handler code here
//    com2<<1;
    buff[0]=0x55;
    com2.write(buff,1);
}

7.关闭串口

void CComDlgDlg::OnButton2()
{
    com2.close();
}