我用VC++编了个RS232串口的程序,以前能用的,不知道为什么现在用不起来了,我基本上试了每个串口,都接受不到信号。为什么啊?
// RS232CommDlg.cpp : implementation file
//#include "stdafx.h"
#include "RS232Comm.h"
#include "RS232CommDlg.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App Aboutclass 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()/////////////////////////////////////////////////////////////////////////////
// CRS232CommDlg dialogCRS232CommDlg::CRS232CommDlg(CWnd* pParent /*=NULL*/)
: CDialog(CRS232CommDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CRS232CommDlg)
m_recv = _T("");
m_send = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CRS232CommDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CRS232CommDlg)
DDX_Text(pDX, IDC_RECV_EDIT, m_recv);
DDX_Text(pDX, IDC_SEND_EDIT, m_send);
DDX_Control(pDX, IDC_MSCOMM1, m_mscom);
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CRS232CommDlg, CDialog)
//{{AFX_MSG_MAP(CRS232CommDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_SEND_BUTTON, OnSendButton)
ON_BN_CLICKED(IDC_CLEAR_BUTTON, OnClearButton)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CRS232CommDlg message handlersBOOL CRS232CommDlg::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
m_mscom.SetCommPort(5);//串口3
m_mscom.SetInBufferSize(1024);//设置输入缓冲区的大小,Bytes
m_mscom.SetOutBufferSize(1024);//设置输出缓冲区的大小,Bytes
if(!m_mscom.GetPortOpen())//打开串口
{
m_mscom.SetPortOpen(true);
}
m_mscom.SetInputMode(1);//设置输入方式为二进制方式
m_mscom.SetSettings("9600,n,8,1");//设置波特率等参数
m_mscom.SetRThreshold(1);//为1表示有一个字符即引发事件
m_mscom.SetInputLen(0);
return TRUE; // return TRUE unless you set the focus to a control
}void CRS232CommDlg::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 CRS232CommDlg::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 CRS232CommDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}void CRS232CommDlg::OnSendButton()
{
// TODO: Add your control notification handler code here
UpdateData(true);
CByteArray sendArr;
WORD wLength;
wLength=m_send.GetLength();
sendArr.SetSize(wLength);
for(int i=0;i<wLength;i++)
{
sendArr.SetAt(i,m_send.GetAt(i));
}
m_mscom.SetOutput(COleVariant(sendArr));
}void CRS232CommDlg::OnClearButton()
{
// TODO: Add your control notification handler code here
m_send="";
UpdateData(false);
}BEGIN_EVENTSINK_MAP(CRS232CommDlg, CDialog)
//{{AFX_EVENTSINK_MAP(CRS232CommDlg)
ON_EVENT(CRS232CommDlg, IDC_MSCOMM1, 1 /* OnComm */, OnOnCommMscomm1, VTS_NONE)
//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()void CRS232CommDlg::OnOnCommMscomm1()
{
// TODO: Add your control notification handler code here
UpdateData(true);
VARIANT variant_inp;
COleSafeArray safearray_inp;
long i=0;
int len;
char rxdata[1000];
CString tmp;
switch (m_mscom.GetCommEvent())
{
case 2:
{
variant_inp=m_mscom.GetInput();
safearray_inp=variant_inp;
len=safearray_inp.GetOneDimSize();
for(i=0;i<len;i++)
{
safearray_inp.GetElement(&i,&rxdata[i]);
}
rxdata[i]='\0';
}
m_recv +=rxdata;
UpdateData(false);
break;
default:
break;
}
}
// RS232CommDlg.cpp : implementation file
//#include "stdafx.h"
#include "RS232Comm.h"
#include "RS232CommDlg.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App Aboutclass 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()/////////////////////////////////////////////////////////////////////////////
// CRS232CommDlg dialogCRS232CommDlg::CRS232CommDlg(CWnd* pParent /*=NULL*/)
: CDialog(CRS232CommDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CRS232CommDlg)
m_recv = _T("");
m_send = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CRS232CommDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CRS232CommDlg)
DDX_Text(pDX, IDC_RECV_EDIT, m_recv);
DDX_Text(pDX, IDC_SEND_EDIT, m_send);
DDX_Control(pDX, IDC_MSCOMM1, m_mscom);
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CRS232CommDlg, CDialog)
//{{AFX_MSG_MAP(CRS232CommDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_SEND_BUTTON, OnSendButton)
ON_BN_CLICKED(IDC_CLEAR_BUTTON, OnClearButton)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CRS232CommDlg message handlersBOOL CRS232CommDlg::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
m_mscom.SetCommPort(5);//串口3
m_mscom.SetInBufferSize(1024);//设置输入缓冲区的大小,Bytes
m_mscom.SetOutBufferSize(1024);//设置输出缓冲区的大小,Bytes
if(!m_mscom.GetPortOpen())//打开串口
{
m_mscom.SetPortOpen(true);
}
m_mscom.SetInputMode(1);//设置输入方式为二进制方式
m_mscom.SetSettings("9600,n,8,1");//设置波特率等参数
m_mscom.SetRThreshold(1);//为1表示有一个字符即引发事件
m_mscom.SetInputLen(0);
return TRUE; // return TRUE unless you set the focus to a control
}void CRS232CommDlg::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 CRS232CommDlg::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 CRS232CommDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}void CRS232CommDlg::OnSendButton()
{
// TODO: Add your control notification handler code here
UpdateData(true);
CByteArray sendArr;
WORD wLength;
wLength=m_send.GetLength();
sendArr.SetSize(wLength);
for(int i=0;i<wLength;i++)
{
sendArr.SetAt(i,m_send.GetAt(i));
}
m_mscom.SetOutput(COleVariant(sendArr));
}void CRS232CommDlg::OnClearButton()
{
// TODO: Add your control notification handler code here
m_send="";
UpdateData(false);
}BEGIN_EVENTSINK_MAP(CRS232CommDlg, CDialog)
//{{AFX_EVENTSINK_MAP(CRS232CommDlg)
ON_EVENT(CRS232CommDlg, IDC_MSCOMM1, 1 /* OnComm */, OnOnCommMscomm1, VTS_NONE)
//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()void CRS232CommDlg::OnOnCommMscomm1()
{
// TODO: Add your control notification handler code here
UpdateData(true);
VARIANT variant_inp;
COleSafeArray safearray_inp;
long i=0;
int len;
char rxdata[1000];
CString tmp;
switch (m_mscom.GetCommEvent())
{
case 2:
{
variant_inp=m_mscom.GetInput();
safearray_inp=variant_inp;
len=safearray_inp.GetOneDimSize();
for(i=0;i<len;i++)
{
safearray_inp.GetElement(&i,&rxdata[i]);
}
rxdata[i]='\0';
}
m_recv +=rxdata;
UpdateData(false);
break;
default:
break;
}
}
2.用串口测试工具先试一下,看看硬件好着没
2.使用超级终端先试试,排除串口线及接口的物理错误
你对比一下定义及顺序,函数名不一样没关系,因为VC版本不一样,但你能看明白函数含义:
void CMy72V300AView::OnCommMscomm1()
{
VARIANT variant_inp;
COleSafeArray safearray_inp;
long i = 0,len;
switch (m_Comm1.get_CommEvent())
{
case 2:
//表示接收缓冲区内有字符
{variant_inp = m_Comm1.get_Input();
safearray_inp = variant_inp;
len = safearray_inp.GetOneDimSize();
for (i = 0; i < len; i++)
{
safearray_inp.GetElement(&i, &m_ReceBuff[i]);
}
m_Comm1.put_OutBufferCount(0);// '清空发送缓冲区
m_Comm1.put_InBufferCount(0);// '滑空接收缓冲区
safearray_inp.Clear();
}
break;
default:
break;
}
}
串口初始化:
view1->m_Comm1.put_CommPort(1); //串口1
view1->m_Comm1.put_InBufferSize(4096); //设置输入缓冲区的大小,Bytes
view1->m_Comm1.put_OutBufferSize(2048); //设置输入缓冲区的大小,Bytes
if(!view1->m_Comm1.get_PortOpen()) //打开串口
{
view1->m_Comm1.put_PortOpen(true);
}
view1->m_Comm1.put_OutBufferCount(0);// '清空发送缓冲区
view1->m_Comm1.put_InBufferCount(0);// '滑空接收缓冲区view1->m_Comm1.put_InputMode(1); //设置输入方式为二进制方式
view1->m_Comm1.put_Settings(str); //设置波特率等参数
view1->m_Comm1.put_RThreshold(8); //为8表示有8个字符即引发事件
view1->m_Comm1.put_InputLen(0);
这是发送函数:
int i,Count;
BYTE SendBuff[8];
CByteArray Array;
Count=8;
Array.RemoveAll();
Array.SetSize(Count);SendBuff[0]=0;
SendBuff[1]=0;
SendBuff[2]=0;
SendBuff[3]=0;
SendBuff[4]=0x55;
SendBuff[5]=0xaa;
SendBuff[6]=0x55;
SendBuff[7]=0xaa;
for(i=0;i<Count;i++)
Array.SetAt(i,SendBuff[i]);
m_CurrentCommandId=2;
m_Comm1.put_OutBufferCount(0);
// m_Comm1.put_InBufferCount(0);m_Comm1.put_Output(COleVariant(Array));