进程间共享串口

【实例截图】

【核心代码】

// MainProcessDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "MainProcess.h"
#include "MainProcessDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#define UWM_COPYHANDLE (WM_USER 100)


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

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

// 对话框数据
enum { IDD = IDD_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CMainProcessDlg 对话框




CMainProcessDlg::CMainProcessDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CMainProcessDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMainProcessDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CMainProcessDlg, CDialogEx)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_CREATESUB, &CMainProcessDlg::OnBnClickedCreatesub)
ON_BN_CLICKED(IDC_OPENSHARE, &CMainProcessDlg::OnBnClickedOpenshare)
ON_BN_CLICKED(IDC_SEND, &CMainProcessDlg::OnBnClickedSend)
END_MESSAGE_MAP()


// CMainProcessDlg 消息处理程序

BOOL CMainProcessDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();

// 将“关于...”菜单项添加到系统菜单中。

// IDM_ABOUTBOX 必须在系统命令范围内。
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);

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

// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
//  执行此操作
SetIcon(m_hIcon, TRUE); // 设置大图标
SetIcon(m_hIcon, FALSE); // 设置小图标

// TODO: 在此添加额外的初始化代码

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

void CMainProcessDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialogEx::OnSysCommand(nID, lParam);
}
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CMainProcessDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // 用于绘制的设备上下文

SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

// 使图标在工作区矩形中居中
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;

// 绘制图标
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialogEx::OnPaint();
}
}

//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CMainProcessDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}



void CMainProcessDlg::OnBnClickedCreatesub()
{
STARTUPINFO si = {sizeof(si)};
PROCESS_INFORMATION pi;
TCHAR subPath[] = L"SubProcess";
CreateProcess(NULL,subPath,NULL,NULL,TRUE,0,NULL,NULL,&si,&pi);

m_hSubProcess = pi.hProcess;
m_hMainProcess = GetCurrentProcess();
}


void CMainProcessDlg::OnBnClickedOpenshare()
{
DCB dcb;

// Open Comm
m_hComm = CreateFile(L"COM3",
     GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
NULL);
if (m_hComm != INVALID_HANDLE_VALUE)
{
GetCommState(m_hComm,&dcb);
dcb.BaudRate = CBR_9600;
dcb.ByteSize = 8;
dcb.StopBits = ONESTOPBIT;
dcb.Parity = NOPARITY;
SetCommState(m_hComm,&dcb);
}

// Share Comm
BOOL bSuccess = DuplicateHandle(m_hMainProcess,m_hComm,m_hSubProcess,&m_hSubComm,
0,TRUE,DUPLICATE_SAME_ACCESS);

// Send Share Handle to SubProcess
if (bSuccess)
{
AfxMessageBox(_T("Success"));

HWND hWindow = ::FindWindow(NULL,_T("SubProcess"));
::PostMessage(hWindow,UWM_COPYHANDLE,(WPARAM)m_hSubComm,0);
}
else
{
AfxMessageBox(_T("Failed"));
CloseHandle(m_hSubProcess);
CloseHandle(m_hComm);
}
}


void CMainProcessDlg::OnBnClickedSend()
{
if (m_hComm != INVALID_HANDLE_VALUE)
{
byte sendBuffer[8];
sendBuffer[0] = 0x80;
sendBuffer[1] = 0x94;
sendBuffer[2] = 0x06;
sendBuffer[3] = 0xff;
sendBuffer[4] = 0xff;
sendBuffer[5] = 0xff;
sendBuffer[6] = 0xff;
sendBuffer[7] = 0xff;

WriteFile(m_hComm,sendBuffer,8,NULL,NULL);
}
}