VC菜菜鸟-创建一个即时串口通信程序

//编者注：串口接收基于多线程任务。

#include <windows.h>
#include <windowsx.h>
#include "main.h"
#include "dialogs.h"
#include "resource.h"
#include "stdio.h"

HANDLE hCom;
DWORD dwError;
DCB LpdcbCom;
OVERLAPPED m_ov;
//Compile error using LPDCB
char ScomBuf[256];

DWORD WINAPI PTRead(LPVOID pParam)
{
 DWORD EV_COMM;
 char str[256];
 char ByteRead[256];
 DWORD BytesSent;
 COMSTAT ComSta;
 DWORD Counter;
 DWORD ErrorNum;
 while(1)
 {
  ( WaitCommEvent(hCom,&EV_COMM,&m_ov));
  if( EV_COMM == EV_RXCHAR )
  {
//   MessageBox(NULL,"RX Event Happened...","",MB_OK);
   EV_COMM = 0;
// sprintf(ByteRead,"\0");
 for(int tmp=0; tmp<256; tmp++)
  ByteRead[tmp]= '\0';

 ClearCommError(hCom,&ErrorNum,&ComSta);
   ReadFile(hCom,  // Handle to COMM port
              &ByteRead,   // RX Buffer Pointer
          ComSta.cbInQue,     // Read one byte
          &BytesSent,   // Stores number of bytes read
                 &m_ov);     // pointer to the m_ov structure
 sprintf(ByteRead,"%s\0",ByteRead);
 SetDlgItemText((HWND )(pParam),IDC_TEXT,ByteRead);//Note: HWND is a Pointer...
//MessageBox(NULL,ByteRead,"",MB_OK);
/*
    sprintf(str,"%c",ByteRead);
 if( ByteRead == '\0' )
 {
  MessageBox(NULL,str,NULL,MB_OK);
  break;
  
 }

*/

  }
// MessageBox(NULL,"Sub-thread","",MB_OK);
// Sleep(1);
 }
/*
 while(1)
 {
  
   ReadFile(hCom,  // Handle to COMM port
              &ByteRead,   // RX Buffer Pointer
          1,     // Read one byte
          &BytesSent,   // Stores number of bytes read
                 &m_ov);     // pointer to the m_ov structure
          sprintf(str,"%c",ByteRead);
 MessageBox(hwnd,str,NULL,MB_OK);
 if( ByteRead == '\0' ) break;
 
 }

*/
}

void OpenScom()
{
 DWORD Error=0;

    CloseHandle(hCom); //Avoid Open Scomm too much time in the same thread.

 hCom = CreateFile( "COM7",\
      GENERIC_READ | GENERIC_WRITE,\
      0,\
      NULL,\
      OPEN_EXISTING,
      FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,\
      NULL
     );

 
 if( hCom == INVALID_HANDLE_VALUE)
 {
  
  if( 5 == GetLastError() )
  {
   sprintf(ScomBuf,"%s","串口已被占用");
   MessageBox(NULL,ScomBuf,NULL,MB_OK);
  }
  ClearCommError(hCom,&Error,NULL);  
//  sprintf(ScomBuf,"%u",dwError);
 } 

 GetCommState(hCom,&LpdcbCom);
 BuildCommDCB("baud=9600 parity=N data=8 stop=1",&LpdcbCom);
 SetCommState(hCom,&LpdcbCom);
 
 
}

void InitScom()
{
 
}

 

BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        //BEGIN MESSAGE CRACK
        HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog);
        HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand);
        HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose);
        //END MESSAGE CRACK
    }

    return FALSE;
}

////////////////////////////////////////////////////////////////////////////////
//  Main_OnInitDialog
BOOL Main_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam)
{
    // Set app icons
    HICON hIcon = LoadIcon((HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE) ,MAKEINTRESOURCE(IDI_ICONAPP));
    SendMessage(hwnd, WM_SETICON, TRUE,  (LPARAM)hIcon);
    SendMessage(hwnd, WM_SETICON, FALSE, (LPARAM)hIcon);
//    SetDlgItemText(hwnd,IDC_TEXT,"jr");

 CreateThread(NULL,0,PTRead,hwnd,0,NULL);   
    //
    // Add initializing code here
    //

   
    return TRUE;
}

////////////////////////////////////////////////////////////////////////////////
//  Main_OnCommand
void Main_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)
{
 DWORD BytesSent = 0;
 char ByteRead;
 char str[255];
    switch(id)
    {
     case IDC_SEND:
     //  MessageBox(hwnd,"TEST","TEST",MB_OK);
//    TransmitCommChar(hCom,'J');

   WriteFile(hCom, // Handle to COMM Port
        "Hello,world.", // Pointer to message buffer in calling finction
        12,  // Length of message to send
        &BytesSent,  // Where to store the number of bytes sent
        &m_ov );   // Overlapped structure

  break;
     
        case IDC_OK:
//            MessageBox(hwnd,TEXT("You clicked OK!"),TEXT("SCOM"),MB_OK);
   OpenScom();
   SetCommMask(hCom,EV_RXCHAR);
//              EndDialog(hwnd, id);
        break;
        case IDC_CANCEL:
//            MessageBox(hwnd,TEXT("You clicked Cancel!"),TEXT("SCOM"),MB_OK);

         CloseHandle(hCom);

//        EndDialog(hwnd, id);
        break;
        default:break;
    }

}

////////////////////////////////////////////////////////////////////////////////
//  Main_OnClose
void Main_OnClose(HWND hwnd)
{
    EndDialog(hwnd, 0);
}