init.c

用于串口的测试调试

/*-----------------------------------------------------------------------------

    This is a part of the Microsoft Source Code Samples. 
    Copyright (C) 1995 Microsoft Corporation.
    All rights reserved. 
    This source code is only intended as a supplement to 
    Microsoft Development Tools and/or WinHelp documentation.
    See these sources for detailed information regarding the 
    Microsoft samples programs.

    MODULE: Init.c

    PURPOSE: Intializes global data and comm port connects.
                Closes comm ports and cleans up global data.

    FUNCTIONS:
        GlobalInitialize  - Init global variables and system objects
        GlobalCleanup     - cleanup global variables and system objects
        ClearTTYContents  - Clears the tty buffer
        InitNewFont       - Creates a new font for the TTY child window
        CreateTTYInfo     - Creates the dynamic tty info structure controlling
                            behavior of tty
        DestroyTTYInfo    - deallocates tty info structure
        StartThreads      - Starts worker threads when a port is opened
        SetupCommPort     - Opens the port for the first time
        WaitForThreads    - Sets the thread exit event and wait for worker
                            threads to exit
        BreakDownCommPort - Closes a connection to the comm port
        DisconnectOK      - Asks user if it is ok to disconnect

-----------------------------------------------------------------------------*/

#include <windows.h>
#include <commctrl.h>
#include "mttty.h"

/*
    Prototypes for functions called only within this file
*/
void StartThreads( void );
DWORD WaitForThreads( DWORD );

/*
    TimeoutsDefault
        We need ReadIntervalTimeout here to cause the read operations
        that we do to actually timeout and become overlapped.
        Specifying 1 here causes ReadFile to return very quickly
        so that our reader thread will continue execution.
*/
COMMTIMEOUTS gTimeoutsDefault = { 0x01, 0, 0, 0, 0 };


/*-----------------------------------------------------------------------------

FUNCTION: GlobalInitialize

PURPOSE: Intializes global variables before any windows are created

COMMENTS: Partner to GlobalCleanup

HISTORY:   Date:      Author:     Comment:
           10/27/95   AllenD      Wrote it

-----------------------------------------------------------------------------*/
void GlobalInitialize()
{
    int cyMenuHeight, cyCaptionHeight, cyFrameHeight;

    //
    // critical sections in status reporting & node management
    //
    InitializeCriticalSection(&gStatusCritical);
    InitializeCriticalSection(&gcsWriterHeap);
    InitializeCriticalSection(&gcsDataHeap);

    //
    // status message event
    //
    ghStatusMessageEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    if (ghStatusMessageEvent == NULL)
        ErrorReporter("CreateEvent (Status message event)");

    //
    // thread exit event
    //
    ghThreadExitEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    if (ghThreadExitEvent == NULL)
        ErrorReporter("CreateEvent (Thread exit event)");        

    //
    // used in file transfer status bar
    //
    //InitCommonControls();

    //
    // font for status reporting control
    //
    ghFontStatus = CreateStatusEditFont();

    //
    // the following are used for sizing the tty window and dialog windows
    //
    gwBaseY = HIWORD(GetDialogBaseUnits());
    cyMenuHeight = GetSystemMetrics(SM_CYMENU);
    cyCaptionHeight = GetSystemMetrics(SM_CYCAPTION);
    cyFrameHeight = GetSystemMetrics(SM_CYFRAME);
    gcyMinimumWindowHeight = cyMenuHeight + \
                            4 * cyCaptionHeight + \
                            2 * cyFrameHeight +
                            (SETTINGSFACTOR + STATUSFACTOR) * gwBaseY ;
    return ;
}


/*-----------------------------------------------------------------------------

FUNCTION: GlobalCleanup

PURPOSE: Cleans up any global variables

COMMENTS: Partner to GlobalInitialize

HISTORY:   Date:      Author:     Comment:
           10/27/95   AllenD      Wrote it

-----------------------------------------------------------------------------*/
void GlobalCleanup()
{
    DeleteCriticalSection(&gStatusCritical);
    DeleteCriticalSection(&gcsWriterHeap);
    DeleteCriticalSection(&gcsDataHeap);
    DeleteObject(ghFontStatus);
    CloseHandle(ghStatusMessageEvent);
    CloseHandle(ghThreadExitEvent);
    HeapDestroy(ghStatusMessageHeap);
    return;
}


/*-----------------------------------------------------------------------------

FUNCTION: ClearTTYContents

PURPOSE: Clears the tty buffer

RETURN: always TRUE

HISTORY:   Date:      Author:     Comment:
           10/27/95   AllenD      Wrote it

-----------------------------------------------------------------------------*/
BOOL ClearTTYContents()
{
    FillMemory(SCREEN(TTYInfo), MAXCOLS*MAXROWS, ' ');
    return TRUE;
}


/*-----------------------------------------------------------------------------

FUNCTION: InitNewFont(LOGFONT, COLORREF)

PURPOSE: Prepares a font for use in the TTY screen

PARAMETERS:
    LogFont  - New logical font for tty screen
    rgbColor - New color for TTY painting

COMMENTS: Called when a new connection is made, or the TTY font
          is changed by the user.

HISTORY:   Date:      Author:     Comment:
           10/27/95   AllenD      Wrote it

-----------------------------------------------------------------------------*/
void InitNewFont(LOGFONT LogFont, COLORREF rgbColor)
{
    TEXTMETRIC tm;
    HDC        hDC;

    //
    // if old one exists, then I should delete it
    //
    if (HTTYFONT(TTYInfo))
        DeleteObject(HTTYFONT(TTYInfo));

    LFTTYFONT(TTYInfo) = LogFont;
    HTTYFONT(TTYInfo) = CreateFontIndirect(&(LFTTYFONT(TTYInfo)));
    FGCOLOR(TTYInfo) = rgbColor;

    hDC = GetDC( ghwndMain ) ;
    SelectObject( hDC, HTTYFONT( TTYInfo ) ) ;
    GetTextMetrics( hDC, &tm ) ;
    ReleaseDC( ghwndMain, hDC ) ;

    //
    // character width and height
    //
    XCHAR( TTYInfo ) = tm.tmAveCharWidth  ;
    YCHAR( TTYInfo ) = tm.tmHeight + tm.tmExternalLeading ;

    XOFFSET( TTYInfo ) = 0 ;
    YOFFSET( TTYInfo ) = YCHAR(TTYInfo) * ROW(TTYInfo);
}

/*-----------------------------------------------------------------------------

FUNCTION: InitTTYInfo

PURPOSE: Initializes TTY structure

COMMENTS: This structure is a collection of TTY attributes
          used by all parts of this program

HISTORY:   Date:      Author:     Comment:
           10/27/95   AllenD      Wrote it
            2/14/96   AllenD      Removed npTTYInfo

-----------------------------------------------------------------------------*/
BOOL InitTTYInfo()
{
    //
    // initialize generial TTY info
    //
    COMDEV( TTYInfo )        = NULL ;
    CONNECTED( TTYInfo )     = FALSE ;
    LOCALECHO( TTYInfo )     = FALSE ;
    CURSORSTATE( TTYInfo )   = CS_HIDE ;
    PORT( TTYInfo )          = 1 ;
    BAUDRATE( TTYInfo )      = CBR_9600 ;
    BYTESIZE( TTYInfo )      = 8 ;
    PARITY( TTYInfo )        = NOPARITY ;
    STOPBITS( TTYInfo )      = ONESTOPBIT ;
    AUTOWRAP( TTYInfo )      = TRUE;
    NEWLINE( TTYInfo )       = FALSE;
    XSIZE( TTYInfo )         = 0 ;
    YSIZE( TTYInfo )         = 0 ;
    XSCROLL( TTYInfo )       = 0 ;
    YSCROLL( TTYInfo )       = 0 ;
    COLUMN( TTYInfo )        = 0 ;
    ROW( TTYInfo )           = MAXROWS - 1 ;
    DISPLAYERRORS( TTYInfo ) = TRUE ;

    //
    // timeouts
    //
    TIMEOUTSNEW( TTYInfo )   = gTimeoutsDefault;

    //
    // read state and status events
    //
    gdwReceiveState            = RECEIVE_TTY;
    EVENTFLAGS( TTYInfo )    = EVENTFLAGS_DEFAULT;
    FLAGCHAR( TTYInfo )      = FLAGCHAR_DEFAULT;

    //
    // Flow Control Settings
    //
    DTRCONTROL( TTYInfo )    = DTR_CONTROL_ENABLE;
    RTSCONTROL( TTYInfo )    = RTS_CONTROL_ENABLE;
    XONCHAR( TTYInfo )       = ASCII_XON;
    XOFFCHAR( TTYInfo )      = ASCII_XOFF;
    XONLIMIT( TTYInfo )      = 0;
    XOFFLIMIT( TTYInfo )     = 0;
    CTSOUTFLOW( TTYInfo )    = FALSE;
    DSROUTFLOW( TTYInfo )    = FALSE;
    DSRINFLOW( TTYInfo )     = FALSE;
    XONXOFFOUTFLOW(TTYInfo)  = FALSE;
    XONXOFFINFLOW(TTYInfo)   = FALSE;
    TXAFTERXOFFSENT(TTYInfo) = FALSE;

    NOREADING(TTYInfo)       = FALSE;
    NOWRITING(TTYInfo)       = FALSE;
    NOEVENTS(TTYInfo)        = FALSE;
    NOSTATUS(TTYInfo)        = FALSE;
    SHOWTIMEOUTS(TTYInfo)    = FALSE;

    //
    // setup default font information
    // 
    LFTTYFONT( TTYInfo ).lfHeight =         12 ;
    LFTTYFONT( TTYInfo ).lfWidth =          0 ;
    LFTTYFONT( TTYInfo ).lfEscapement =     0 ;
    LFTTYFONT( TTYInfo ).lfOrientation =    0 ;
    LFTTYFONT( TTYInfo ).lfWeight =         0 ;
    LFTTYFONT( TTYInfo ).lfItalic =         0 ;
    LFTTYFONT( TTYInfo ).lfUnderline =      0 ;
    LFTTYFONT( TTYInfo ).lfStrikeOut =      0 ;