"

 COPYRIGHT (c) 2006 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libbasic2' }"

NonPositionableExternalStream subclass:#SerialPort

	classVariableNames:'DefaultPortName'

	poolDictionaries:''

	category:'Streams-External'

!

!SerialPort primitiveDefinitions!

%{

#include "stxOSDefs.h"

#ifdef WIN32

# undef __BEGIN_INTERRUPTABLE__

# undef __END_INTERRUPTABLE__

# define __BEGIN_INTERRUPTABLE__ ..

# define __END_INTERRUPTABLE__ ..

# define WRAP_STDIO

# define PORT_FROM_FD(fd)     (_get_osfhandle(fd))

# define closePort(port)      closeHandle(port)

# define SERIALPORT           HANDLE

#else /* not WIN32 */

# define PORT_FROM_FD(fd)     (fd)

# define closePort(port)      close(port)

# define SERIALPORT           int

#endif /* WIN32 */

# define PORT_FROM_FILE(f)             (PORT_FROM_FD(fileno(f)))

# define PORT_FROM_FILE_OBJECT(f)      (PORT_FROM_FILE(__FILEVal(f)))

#include <stdio.h>

#include <errno.h>

/*

 * on some systems errno is a macro ... check for it here

 */

#ifndef errno

 extern errno;

#endif

#ifdef USE_H_ERRNO

# ifndef h_errno

 extern h_errno;

# endif

#endif

#ifdef DEBUG

# define DBGPRINTF(x)    { if (__debugging__) printf x; }

# define DBGFPRINTF(x)   { if (__debugging__) fprintf x; }

#else

# define DBGPRINTF(x)    /* as nothing */

# define DBGFPRINTF(x)   /* as nothing */

#endif

#ifndef TRUE

# define TRUE   1

#endif

#ifndef FALSE

# define FALSE  0

#endif

#ifndef WIN32

typedef int BOOL;

#endif

%}

! !

!SerialPort primitiveVariables!

%{

static int __debugging__ = 0;

%}

! !

!SerialPort class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2006 by eXept Software AG

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    This class provides access to serial ports

"

!

examples

"

    example (get help info from an nntp server):

"

! !

portName:portName

   baudRate:baudRateOrNil stopBitsType:stopBitsTypeOrNil

   parityType:parityTypeOrNil dataBits:dataBitsOrNil

   inFlowCtrlType:inFlowCtrlTypeOrNil outFlowCtrlType:outFlowCtrlTypeOrNil

   xOnChar:xOnCharOrNil xOffChar:xOffCharOrNil

    "arguments are self describing; nil values mean: leave setting as is"

    ^ (self new

	setPortName:portName

	baudRate:baudRateOrNil stopBitsType:stopBitsTypeOrNil

	parityType:parityTypeOrNil dataBits:dataBitsOrNil

	inFlowCtrlType:inFlowCtrlTypeOrNil outFlowCtrlType:outFlowCtrlTypeOrNil

	xOnChar:xOnCharOrNil xOffChar:xOffCharOrNil) open

! !

!SerialPort class methodsFor:'debugging'!

debug:aBoolean

    "turn on/off internal debugprints.

     This method is for ST/X debugging only and

     may  be removed in later versions"

%{  /* NOCONTEXT */

    __debugging__ = (aBoolean == true);

%}

    "

     SerialPort debug:true

     SerialPort debug:false

    "

! !

!SerialPort methodsFor:'accessing'!

setPortName:portNameArg

	baudRate:baudRateOrNil stopBitsType:stopBitsTypeOrNil

	parityType:parityTypeOrNil dataBits:dataBitsOrNil

	inFlowCtrlType:inFlowCtrlTypeOrNil outFlowCtrlType:outFlowCtrlTypeOrNil

	xOnChar:xOnCharOrNil xOffChar:xOffCharOrNil

    portName := portNameArg.

    baudRate := baudRateOrNil.

    stopBitsType := stopBitsTypeOrNil.

    parityType := parityTypeOrNil.

    dataBits := dataBitsOrNil.

    inFlowCtrlType := inFlowCtrlTypeOrNil.

    outFlowCtrlType := outFlowCtrlTypeOrNil.

    xOnChar := xOnCharOrNil.

    xOffChar := xOffCharOrNil.

! !

!SerialPort protectedMethodsFor:'low level'!

closeFile

    "low level close"

%{

    OBJ t;

    t = __INST(filePointer);

    if (t != nil) {

	FILE *fp;

	SERIALPORT port;

	__INST(filePointer) = nil;

	fp = __FILEVal(t);

	port = PORT_FROM_FILE(fp);

# ifdef xxDO_WRAP_CALLS

	{ int ret;

	  do {

	    __threadErrno = 0;

	    ret = STX_C_CALL1("fclose", fclose, fp);

	  } while ((ret < 0) && (__threadErrno == EINTR));

#  ifdef WIN32

	  do {

	    __threadErrno = 0;

	    ret = STX_WSA_CALL1("CloseHandle", CloseHandle, port);

	  } while ((ret < 0) && (__threadErrno == EINTR));

	  CloseHandle(port);

#  endif

	}

# else /* !DO_WRAP_CALLS */

	fclose(fp);

#  ifdef WIN32

	CloseHandle(port);

#  endif

# endif /* !DO_WRAP_CALLS */

    }

%}

! !

!SerialPort methodsFor:'opening'!

open

    |errorNumber|

    filePointer notNil ifTrue:[

	^ self errorAlreadyOpen

    ].

%{

    FILE *fp;

    SERIALPORT port;

    char *__portName;

    int __setBaudRate = 1,

	__setDataBits = 1,

	__setXOnChar = 1,

	__setXOffChar = 1,

	__setInFlowCtrl = 1,

	__setOutFlowCtrl = 1,

	__setStopBits = 1,

	__setParityType = 1;

    int __baudRate, __dataBits;

    int __xOnChar, __xOffChar;

    int __inFlowCtrl, __outFlowCtrl;

    int __stopBits, __parityType;

#ifdef WIN32

    COMMTIMEOUTS timeouts;

    DCB dcb;

#endif /* WIN32 */

#   define XONOFF    1

#   define HARDWARE  2

#   define STOP1     1

#   define STOP2     2

#   define STOP1_5   3

#   define ODD       1

#   define EVEN      2

#   define NONE      3

    if (__isString(__INST(portName))) {

	__portName = __stringVal(__INST(portName));

    } else {

	goto failure;

    }

    if (__isSmallInteger(__INST(baudRate))) {

	__baudRate = __intVal(__INST(baudRate));

    } else if (__INST(baudRate) == nil) {

	__setBaudRate = 0;

    } else {

	goto failure;

    }

    if (__isSmallInteger(__INST(dataBits))) {

	__dataBits = __intVal(__INST(dataBits));

    } else if (__INST(dataBits == nil)) {

	__setDataBits = 0;

    } else {

	goto failure;

    }

    if (__isSmallInteger(__INST(xOnChar))) {

	__xOnChar = __intVal(__INST(xOnChar));

    } else if (__isCharacter(__INST(xOnChar))) {

	__xOnChar = __intVal(_characterVal(__INST(xOnChar)));

    } else if (__INST(xOnChar) == nil) {

	__setXOnChar = 0;

    } else {

	goto failure;

    }

    if (__isSmallInteger(__INST(xOffChar))) {

	__xOffChar = __intVal(__INST(xOffChar));

    } else if (__isCharacter(__INST(xOffChar))) {

	__xOffChar = __intVal(__characterVal(__INST(xOffChar)));

    } else if (__INST(xOffChar) == nil) {

	__setXOffChar = 0;

    } else {

	goto failure;

    }

    if (__INST(inFlowCtrlType) == @symbol(xOnOff)) {

	__inFlowCtrl = XONOFF;

    } else if (__INST(inFlowCtrlType) == @symbol(hardware)) {

	__inFlowCtrl = HARDWARE;

    } else if (__INST(inFlowCtrlType) == nil) {

	__setInFlowCtrl = 0;

    } else {

	goto failure;

    }

    if (__INST(outFlowCtrlType) == @symbol(xOnOff)) {

	__outFlowCtrl = XONOFF;

    } else if (__INST(outFlowCtrlType) == @symbol(hardware)) {

	__outFlowCtrl = HARDWARE;

    } else if (__INST(outFlowCtrlType) == nil) {

	__setOutFlowCtrl = 0;

    } else {

	goto failure;

    }

    if (__INST(stopBitsType) == @symbol(stop1)) {

	__stopBits = STOP1;

    } else if (__INST(stopBitsType) == @symbol(stop2)) {

	__stopBits = STOP2;

    } else if (__INST(stopBitsType) == @symbol(stop1_5)) {

	__stopBits = STOP1_5;

    } else if (__INST(stopBitsType) == nil) {

	__setStopBits = 0;

    } else {

	goto failure;

    }

#ifdef WIN32

    port = CreateFile(__portName,

	      GENERIC_READ | GENERIC_WRITE,

	      0,             /* comm devices must be opened with exclusive access */

	      NULL,          /* no security attrs */

	      OPEN_EXISTING, /* comm devices must use OPEN_EXISTING */

	      0,             /* no overlapped I/O */

	      NULL           /* hTemplate must be NULL for comm devices */

	   );

    if (port == INVALID_HANDLE_VALUE) {

	fprintf(stderr, "Win32OS [info]: serial port open failed\n");

	errorNumber = __mkSmallInteger( __WIN32_ERR(GetLastError()) );

	goto failure;

    }

    /* Flush the driver */

    PurgeComm( port, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR );

    /* Set driver buffer sizes */

    SetupComm( port, 4096 /*SERIAL_IN_QUEUE_SIZE*/, 4096 /*SERIAL_OUT_QUEUE_SIZE*/);

    /* Reset timeout constants */

    timeouts.ReadIntervalTimeout= 0xFFFFFFFF;

    timeouts.ReadTotalTimeoutMultiplier = 0;

    timeouts.ReadTotalTimeoutConstant = 0;

    timeouts.WriteTotalTimeoutMultiplier = 0;

    timeouts.WriteTotalTimeoutConstant = 0;

    SetCommTimeouts( port, &timeouts );

    /* Set communication parameters */

    ZeroMemory(&dcb, sizeof(dcb));

    dcb.DCBlength = sizeof(dcb);

    GetCommState(port, &dcb);

    if (__setBaudRate) dcb.BaudRate = __baudRate;

    if (__setDataBits) dcb.ByteSize = __dataBits;

    if (__setXOnChar)  dcb.XonChar = __xOnChar;

    if (__setXOffChar) dcb.XoffChar = __xOffChar;

    if (__setStopBits) {

	/* set stop bits */

	switch(__stopBits) {

	    case STOP1_5: dcb.StopBits = 1; break; /* 1.5 stop bits */

	    case STOP1: dcb.StopBits = 0; break; /* 1 stop bit */

	    case STOP2: dcb.StopBits = 2; break; /* 2 stop bits */

	    default: goto errExit;

	}

    }

    if (__setParityType) {

	/* set parity */

	switch(__parityType) {

	    case NONE: dcb.Parity = NOPARITY; break;

	    case ODD: dcb.Parity = ODDPARITY; break;

	    case EVEN: dcb.Parity = EVENPARITY; break;

	    default: goto errExit;

	}

    }

    if (__setInFlowCtrl) {

	/* set control flow */

	dcb.fInX = FALSE;

	dcb.fDtrControl = FALSE;

	if (__inFlowCtrl == XONOFF) dcb.fInX = TRUE;  /* XOn/XOff handshaking */

	if (__inFlowCtrl == HARDWARE) dcb.fDtrControl = TRUE;  /* hardware handshaking */

    }

    if (__setOutFlowCtrl) {

	dcb.fOutX = FALSE;

	dcb.fOutxCtsFlow = FALSE;

	if (__outFlowCtrl == XONOFF) dcb.fOutX = TRUE;  /* XOn/XOff handshaking */

	if (__outFlowCtrl == HARDWARE) dcb.fOutxCtsFlow = TRUE;  /* hardware handshaking */

    }

    if (! SetCommState(port, &dcb)) {

	fprintf(stderr, "Win32OS [info]: serial port comm-setup failed\n");

	errorNumber = __mkSmallInteger( __WIN32_ERR(GetLastError()) );

	goto errExit;

    }

# endif /* WIN32 */

    /*

     * make it a FILE *

     */

# ifdef WIN32

    {

	int _fd = _open_osfhandle(port, 0);

	fp = fdopen(_fd, "r+");

    }

# else

    fp = fdopen(port, "r+");

# endif

    if (! fp) {

	errorNumber = __MKSMALLINT(errno);

	goto errExit;

    }

    {

	OBJ t;

	t = __MKOBJ(fp);

	__INST(filePointer) = t;

	__STORE(self, t);

    }

	RETURN( true );

errExit: ;

    CloseHandle(port);

failure: ;

#   undef XONOFF

#   undef HARDWARE

#   undef STOP1

#   undef STOP2

#   undef STOP1_5

#   undef ODD

#   undef EVEN

#   undef NONE

%}.