"{ Encoding: utf8 }"

"

 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' }"

"{ NameSpace: Smalltalk }"

NonPositionableExternalStream subclass:#SerialPort

	instanceVariableNames:'portName baudRate stopBitsType parityType dataBits inFlowCtrlType

		outFlowCtrlType xOnChar xOffChar'

	classVariableNames:'DefaultPortName'

	poolDictionaries:''

	category:'Streams-External'

!

!SerialPort primitiveDefinitions!

%{

#include "stxOSDefs.h"

#ifdef __win32__

/* this is to catch uses of those - there should be none */

# undef __BEGIN_INTERRUPTABLE__

# undef __END_INTERRUPTABLE__

# ifdef __TCC__

#  define __BEGIN_INTERRUPTABLE__ xxxx

#  define __END_INTERRUPTABLE__ yyyy

# else

#  define __BEGIN_INTERRUPTABLE__ ..

#  define __END_INTERRUPTABLE__ ..

# endif

# 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__) console_printf x; }

#else

# define DBGPRINTF(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.

    Before opening, the port should be configured, unless the default settings

    are not correct.

    i.e.

        port := SerialPort new.

        port setBaudrate:19200

        port open.

    Arguments/Parameters/Instvars:

        portName                String                  device name

                                                            WIN32:  COM0, COM1, ...

                                                            Unix:   /dev/ttyS0, ...

                                                                    /dev/cua0, ...

        baudRate                Integer                 9600, 19200, ...

        stopBitsType            Symbol                  #stop1, #stop1_5 or #stop2

        parityType              Symbol                  #odd, #even or #none

        dataBits                Integer                 5, 6, 7, 8

        inFlowCtrlType          Symbol                  #xOnOff, #hardware or #none

        outFlowCtrlType         Symbol                  #xOnOff, #hardware or #none

        xOnChar                 Integer | Character

        xOffChar'               Integer | Character

"

!

examples

"

    example (get help info from an nntp server):

									[exBegin]

    |serialPort|

    serialPort := SerialPort new setPortName:(SerialPort defaultPortName).

    serialPort open.

    serialPort close.

									[exEnd]

									[exBegin]

    |serialPort|

    serialPort := SerialPort new setPortName:'COM5'.

    serialPort open.

    serialPort nextPutAll:'hello world'.

    serialPort cr.

    serialPort close.

									[exEnd]

									[exBegin]

    |serialPort|

    serialPort := SerialPort new setPortName:'COM5'.

    serialPort open.

    Transcript showCR:(serialPort nextAvailable:100).

    serialPort close.

									[exEnd]

"

! !

!SerialPort class methodsFor:'instance creation'!

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.

     baudrate is a number i.e. 9600, 19200...

     stopBitsType must be one of: #stop1, #stop1_5 or #stop2

     parityType must be one of: #odd, #even or #none

     dataBits must be 5, 6, 7 or 8

     inFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)

     outFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)  

     xOnChar must be nil or a character or a small byte valued integer

     xOffChar must be nil or a character or a small byte valued integer

    "

    ^ self new

        setPortName:portName

        baudRate:baudRateOrNil stopBitsType:stopBitsTypeOrNil

        parityType:parityTypeOrNil dataBits:dataBitsOrNil

        inFlowCtrlType:inFlowCtrlTypeOrNil outFlowCtrlType:outFlowCtrlTypeOrNil

        xOnChar:xOnCharOrNil xOffChar:xOffCharOrNil

! !

!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 class methodsFor:'defaults'!

defaultPortName

    DefaultPortName notNil ifTrue:[^ DefaultPortName ].

    OperatingSystem isMSDOSlike ifTrue:[

        ^ 'COM1'

    ].

    ^ '/dev/ttyS0'

    "Modified: / 05-02-2020 / 17:54:20 / stefan"

!

defaultPortName:aString

    DefaultPortName := aString

! !

!SerialPort methodsFor:'accessing'!

pathName

    "answer the port name - compatibilty with FileStream"

    ^ portName

!

setBaudRate:baudRateOrNil

    "baudrate is a number i.e. 9600, 19200....

     Must be set before opening."

    baudRate := baudRateOrNil.

!

setDataBits:dataBitsOrNil

    "dataBits must be 5, 6, 7 or 8.

     Must be set before opening."

    dataBits := dataBitsOrNil.

!

setInFlowCtrlType:inFlowCtrlTypeOrNil

    "inFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)

     Must be set before opening."

    inFlowCtrlType := inFlowCtrlTypeOrNil.

!

setOutFlowCtrlType:outFlowCtrlTypeOrNil

    "outFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)

     Must be set before opening."

    outFlowCtrlType := outFlowCtrlTypeOrNil.

!

setParityType:parityTypeOrNil

    "parityType must be one of: #odd, #even or #none.

     Must be set before opening."

    parityType := parityTypeOrNil.

!

setPortName:portNameArg

    "Must be set before opening."

    (portNameArg startsWith:'C') ifTrue:[

        "/ add special port name to support COM ports > 9

        portName := '\\.\', portNameArg.

        ^ self

    ].

    portName := portNameArg.

!

setPortName:portNameArg

        baudRate:baudRateOrNil stopBitsType:stopBitsTypeOrNil

        parityType:parityTypeOrNil dataBits:dataBitsOrNil

        inFlowCtrlType:inFlowCtrlTypeOrNil outFlowCtrlType:outFlowCtrlTypeOrNil

        xOnChar:xOnCharOrNil xOffChar:xOffCharOrNil

    "these must be set before opening.

     baudrate is a number i.e. 9600, 19200...

     stopBitsType must be one of: #stop1, #stop1_5 or #stop2

     parityType must be one of: #odd, #even or #none

     dataBits must be 5, 6, 7 or 8

     inFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)

     outFlowCtrlType must be one of: #xOnOff, #hardware or #none (or nil)  

     xOnChar must be nil or a character or a small byte valued integer

     xOffChar must be nil or a character or a small byte valued integer

    "

    self setPortName:portNameArg.

    baudRate := baudRateOrNil.

    stopBitsType := stopBitsTypeOrNil.

    parityType := parityTypeOrNil.

    dataBits := dataBitsOrNil.

    inFlowCtrlType := inFlowCtrlTypeOrNil.

    outFlowCtrlType := outFlowCtrlTypeOrNil.

    xOnChar := xOnCharOrNil.

    xOffChar := xOffCharOrNil.

!

setStopBitsType:stopBitsTypeOrNil

    "stopBitsType must be one of: #stop1, #stop1_5 or #stop2.

     Must be set before opening."

    stopBitsType := stopBitsTypeOrNil.

!

setXOffChar:xOffCharOrNil

    "xOffChar must be nil or a character or a small byte valued integer.

     Must be set before opening."

    xOnChar := xOffCharOrNil.

!

setXOnChar:xOnCharOrNil

    "xOnChar must be nil or a character or a small byte valued integer.

     Must be set before opening."

    xOnChar := xOnCharOrNil.

! !

!SerialPort methodsFor:'initialization'!

initialize

    super initialize.

    "/ transparent

    eolMode := nil.

! !

!SerialPort methodsFor:'inspecting'!

inspectorExtraMenuOperations

    "extra operation-menu entries to be shown in an inspector.

     Answers a collection of pairs contining aString and action aBlock.

     aString is the label of the menu item.

     aBlock is evaluated when the menu item is selected.

     To be redefined in objects which think that it makes sense to offer

     often used operations in an inspector.

     See SerialPort as an example."

    ^ super inspectorExtraMenuOperations

    , {

        { 'Close SerialPort' . [self close] }

    }

! !

!SerialPort methodsFor:'low level'!

baudRate:newRate

    "allows change of the baudrate while being open.

     Currently, only works for windows.

     Unix users should close, reconfigure and reopen."

    handle isNil ifTrue:[

        "not open"

        baudRate := newRate.

        ^ self

    ].

%{

    OBJ fp;

    fp = __INST(handle);

    if (__isSmallInteger(newRate)) {

        SERIALPORT port;

        int ret;

        port = PORT_FROM_FILE_OBJECT(fp);

#ifdef __win32__

        {

            DCB dcb;

            ZeroMemory(&dcb, sizeof(dcb));

            dcb.DCBlength = sizeof(dcb);

            GetCommState(port, &dcb);

            dcb.BaudRate = __intVal(newRate);

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

                RETURN(false);

            }

            __INST(baudRate) = newRate;

            RETURN(true);

        }

# else /* ! __win32__ */

        /* add code for unix ioctl here ... */

# endif /* __win32__ */

    }

%}.

    self primitiveFailed.

! !

!SerialPort protectedMethodsFor:'low level'!

closeFile

    "low level close"

%{

    OBJ t = __INST(handle);

    if (t != nil) {

	FILE *fp = __FILEVal(t);

	__INST(handle) = nil;

#if defined(__win32__) && defined(xxxDO_WRAP_CALLS)

	{

	    int ret;

	    do {

		__threadErrno = 0;

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

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

	}

#else

	fclose(fp);

#endif

    }

%}

    "Modified: / 05-08-2011 / 14:13:35 / cg"

! !

!SerialPort methodsFor:'opening'!

open

    "open the OS-port.

    Notice: all parameters (baudrate, stopbits, etc.) must have been set before"

    |errorSymbol errorNumber|

    handle 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 FLG_FLOW_XONOFF    1

#   define FLG_FLOW_HARDWARE  2

#   define FLG_FLOW_NONE      3

#   define FLG_STOP_1         1

#   define FLG_STOP_2         2

#   define FLG_STOP_1_5       3

#   define FLG_PARITY_ODD     1

#   define FLG_PARITY_EVEN    2

#   define FLG_PARITY_NONE    3

    if (__isStringLike(__INST(portName))) {

        __portName = __stringVal(__INST(portName));

    } else {

        errorSymbol = @symbol(portName);

        goto getOutOfhere;

    }

    if (__isSmallInteger(__INST(baudRate))) {

        __baudRate = __intVal(__INST(baudRate));

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

        __setBaudRate = 0;

    } else {