rs232dlg.cpp

采用VC6的API函数编写串口程序

// RS232Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "RS232.h"
#include "RS232Dlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

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

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRS232Dlg dialog

CRS232Dlg::CRS232Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRS232Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRS232Dlg)
	m_sPort =0;
	m_nSETBT = 1;
	m_sSend = 0;
	m_sReseved = 0;
	m_nBt = 19200;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CRS232Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRS232Dlg)
	DDX_Control(pDX, IDC_EDIT_RESEVED, m_cEditreseved);
	DDX_Control(pDX, IDC_EDIT_SEND, m_cEditsend);
	DDX_Control(pDX, IDC_RESEVED, m_cReseved);
	DDX_Control(pDX, IDC_OPENCOMM, m_cOpencomm);
	DDX_Control(pDX, IDC_SEND, m_cSend);
	DDX_Control(pDX, IDC_SETUPCOM, m_cSetupcomm);
	DDX_Control(pDX, IDC_CLOSECOMM, m_cClosecomm);
	DDX_CBIndex(pDX, IDC_COMBO_SELECT, m_sPort);
	DDX_CBIndex(pDX, IDC_BTSETUP, m_nSETBT);
	DDX_Text(pDX, IDC_EDIT_SEND, m_sSend);
	DDX_Text(pDX, IDC_EDIT_RESEVED, m_sReseved);
	DDX_Text(pDX, IDC_EDIT_BAUT, m_nBt);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRS232Dlg, CDialog)
	//{{AFX_MSG_MAP(CRS232Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPENCOMM, OnOpencomm)
	ON_BN_CLICKED(IDC_CLOSECOMM, OnClosecomm)
	ON_BN_CLICKED(IDC_SETUPCOM, OnSetupcom)
	ON_BN_CLICKED(IDC_SEND, OnSend)
	ON_BN_CLICKED(IDC_RESEVED, OnReseved)
	ON_CBN_SELCHANGE(IDC_BTSETUP, OnSelchangeBtsetup)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRS232Dlg message handlers

BOOL CRS232Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	m_cClosecomm.EnableWindow(false);
	m_cSend.EnableWindow(false);
	m_cSetupcomm.EnableWindow(false);
	m_cReseved.EnableWindow(false);
		
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CRS232Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CRS232Dlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CRS232Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CRS232Dlg::OnOpencomm() 
{
	// TODO: Add your control notification handler code here
	switch(m_sPort)
	{case 0: m_strPort="COM1";  break;
	 case 1: m_strPort="COM2";  break; }
	hCom=CreateFile(m_strPort,GENERIC_READ|GENERIC_WRITE,0,NULL,
					OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
	m_cClosecomm.EnableWindow(true);
	m_cSetupcomm.EnableWindow(true);
	m_cSetupcomm.SetFocus();
	m_cSend.EnableWindow(false);
	m_cOpencomm.EnableWindow(false);
	m_cReseved.EnableWindow(false);
	
}

void CRS232Dlg::OnClosecomm() 
{
	// TODO: Add your control notification handler code here
	CloseHandle(hCom);
	m_cOpencomm.EnableWindow(true);
    m_cOpencomm.SetFocus();
	m_cReseved.EnableWindow(false);
	m_cSend.EnableWindow(false);
	m_cClosecomm.EnableWindow(false);
	m_cSetupcomm.EnableWindow(false);
}

void CRS232Dlg::OnSetupcom() 
{
	// TODO: Add your control notification handler code here
//开启端口的最后一步是通过使用COMMTIMEOUTS数据结构
//和调用SetCommTimeouts函数进行通讯超时设置
	UpdateData(true);
	SetupComm(hCom,1024,1024);//配置传送时的缓冲区及接收时的缓冲区
	COMMTIMEOUTS Timeouts;
	Timeouts.ReadIntervalTimeout=50;// 接收时，两字符间最大的时延
    Timeouts.ReadTotalTimeoutConstant=500;// 读串口数据的固定超时
	// 总超时 = ReadTotalTimeoutMultiplier * 字节数 + ReadTotalTimeoutConstant
	Timeouts.ReadTotalTimeoutMultiplier=50;// 读取每字节的超时
	Timeouts.WriteTotalTimeoutConstant=500;// 写串口数据的固定超时
	Timeouts.WriteTotalTimeoutMultiplier=50;// 写每字节的超时
	SetCommTimeouts(hCom,&Timeouts);// 将超时参数写入设备控制
    //int m_nSetupbt;
	switch(m_nSETBT)
	{case 0: m_nSetupbt=4800;break;
		case 1: m_nSetupbt=9600;break;
			case 2: m_nSetupbt=19200;break;}
	GetCommState(hCom,&dcb);
	dcb.BaudRate=10000;//m_nSetupbt;
	dcb.ByteSize=8;
	dcb.StopBits=ONESTOPBIT;
	dcb.Parity=NOPARITY;
	SetCommState(hCom,&dcb);
	UpdateData(false);
	m_cSend.EnableWindow(true);
	m_cSend.SetFocus();
	m_cSetupcomm.EnableWindow(false);
	m_cEditsend.SetFocus();
}

void CRS232Dlg::OnSend() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true); 
	bool bSend;
	DWORD length=0;
	unsigned ch[10];
	ch[0]=m_sSend;
	bSend = WriteFile(hCom,ch,1,&length,NULL);
	m_cReseved.EnableWindow(true);



}

void CRS232Dlg::OnReseved() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	bool bReseved;
	DWORD length=0;
	unsigned ch[10];
	bReseved = ReadFile(hCom,ch,1,&length,NULL);
	UpdateData(false);
	ch[0]=ch[0]-3435973632;
	m_sReseved=ch[0];
	SetCommMask(hCom,EV_TXEMPTY);
	UpdateData(false);
	m_cReseved.EnableWindow(false);
}

void CRS232Dlg::OnSelchangeBtsetup() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	m_nBt=m_nSetupbt;
	UpdateData(false);
}

void CRS232Dlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	CRS232Dlg::OnClosecomm();
	CDialog::OnCancel();
}