WIN32 API实现基于对话框的串口通信呈现

// COMSerialDlg.cpp : implementation file // #include "stdafx.h" #include "COMSerial.h" #include "COMSerialDlg.h" #include "afxmt.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() ///////////////////////////////////////////////////////////////////////////// // CCOMSerialDlg dialog CCOMSerialDlg::CCOMSerialDlg(CWnd* pParent /*=NULL*/) : CDialog(CCOMSerialDlg::IDD, pParent) { //{{AFX_DATA_INIT(CCOMSerialDlg) m_nParity = 0; m_nCom = 0; m_dwBaud = 9600; m_nData = 0; m_bOverlap = FALSE; m_nStop = 0; m_nShake = 0; //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CCOMSerialDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CCOMSerialDlg) DDX_Radio(pDX, IDC_PARITY_NONE, m_nParity); DDX_CBIndex(pDX, IDC_COMBO_COM, m_nCom); DDX_Text(pDX, IDC_EDIT_BAUD, m_dwBaud); DDX_Text(pDX, IDC_EDIT_DATA, m_nData); DDX_Check(pDX, IDC_CHECK_OVERLAP, m_bOverlap); DDX_Radio(pDX, IDC_STOP_ONE, m_nStop); DDX_Radio(pDX, IDC_SHAKE_NONE, m_nShake); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CCOMSerialDlg, CDialog) //{{AFX_MSG_MAP(CCOMSerialDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_TRANSFER, OnTransfer) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCOMSerialDlg message handlers BOOL CCOMSerialDlg::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 // TODO: Add extra initialization here return TRUE; // return TRUE unless you set the focus to a control } void CCOMSerialDlg::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 CCOMSerialDlg::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 CCOMSerialDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CCOMSerialDlg::OnTransfer() { COMMCONFIG cfg; CommConfigDialog("COM1",NULL,&cfg); /* // TODO: Add your control notification handler code here // 获得用户指定的参数 this->UpdateData(); // 初始化COM端口 this->Open(m_bOverlap); // 分别采用同步和异步模式 if (m_bOverlap) this->Sync(); else this->Async(); */ } void CCOMSerialDlg::Sync() { HANDLE hCom = Open(FALSE); if (hCom == NULL) return; // 获得调制解调器状态 DWORD dwModemStatus; if (!GetCommModemStatus(hCom, &dwModemStatus)) { AfxMessageBox(_T("读取MODEM状态失败!")); ::CloseHandle(hCom); return; } if (!SetupComm(hCom,9888,9888)) { AfxMessageBox(_T("创建输入/输出缓冲区失败!")); ::CloseHandle(hCom); return; } // 设定访问的超时值 COMMTIMEOUTS timeouts; timeouts.ReadIntervalTimeout = MAXDWORD; timeouts.ReadTotalTimeoutConstant = 0; timeouts.ReadTotalTimeoutMultiplier = 0; timeouts.WriteTotalTimeoutConstant = 0; timeouts.WriteTotalTimeoutMultiplier = 0; // 发送一批数据 CString strSend = "The Data has been Sent!"; DWORD dwWritten = 0; if (!WriteFile(hCom,(LPCTSTR)strSend,strSend.GetLength(),&dwWritten,NULL)) { AfxMessageBox(_T("向端口写数据失败!")); ::CloseHandle(hCom); return; } // 选定“感兴趣”的事件、信号 if (!SetCommMask(hCom,EV_TXEMPTY)) { AfxMessageBox(_T("选择监听信号失败!")); ::CloseHandle(hCom); return; } // 停止对串口的写操作 if (!PurgeComm(hCom,PURGE_TXABORT)) { AfxMessageBox(_T("停止写端口操作时发生错误!")); ::CloseHandle(hCom); return; } char chRead[18]; DWORD dwRead = 0; if (!ReadFile(hCom,chRead,18,&dwRead,NULL)) { AfxMessageBox(_T("从串口读取数据失败!")); ::CloseHandle(hCom); return; } // 停止对串口的写操作 if (!PurgeComm(hCom,PURGE_RXABORT)) { AfxMessageBox(_T("停止读端口操作时发生错误!")); ::CloseHandle(hCom); return; } // 将缓冲区中的数据发送到串口 if (!FlushFileBuffers(hCom)) { AfxMessageBox(_T("处理缓冲数据时发生错误!")); ::CloseHandle(hCom); return; } ::CloseHandle(hCom); } void CCOMSerialDlg::Async() { HANDLE hCom = Open(TRUE); if (hCom == NULL) return; CEvent event(FALSE,TRUE); OVERLAPPED overlapped; // 初始化OVERLAPPED结构 memset(&overlapped,sizeof(OVERLAPPED),'\0'); overlapped.hEvent = event; DWORD dwWritten = 0; CString strSend = "The Data has been Sent!"; // 异步发送 if (!WriteFile(hCom,(LPCTSTR)strSend,strSend.GetLength(),&dwWritten,&overlapped)) { if (GetLastError() != ERROR_IO_PENDING) { AfxMessageBox(_T("写端口失败!")); ::CloseHandle(hCom); return; } WaitForSingleObject(event,INFINITE); if (!::GetOverlappedResult(hCom,&overlapped,&dwWritten,TRUE)) { AfxMessageBox(_T("等待异步操作结果时发生错误!")); ::CloseHandle(hCom); return; } } char chRead[18]; DWORD dwRead = 0; // 异步读取 if (!ReadFile(hCom,chRead,18,&dwRead,&overlapped)) { if (GetLastError() != ERROR_IO_PENDING) { AfxMessageBox(_T("读端口失败!")); ::CloseHandle(hCom); return; } if (WaitForSingleObject(event,1888) != WAIT_OBJECT_0) { AfxMessageBox(_T("读端口失败!")); ::CloseHandle(hCom); return; } if (!::GetOverlappedResult(hCom,&overlapped,&dwRead,TRUE)) { AfxMessageBox(_T("等待异步操作结果时发生错误!")); ::CloseHandle(hCom); return; } } DWORD dwMask = EV_TXEMPTY; if (!S