libopie2/opiecore/device/:

    Patch by hrhr to add basic backlight support for the
    hx4700 series of iPAQs to ODevice

2 files changed, 14 insertions, 1 deletions

diff --git a/libopie2/opiecore/device/odevice.h b/libopie2/opiecore/device/odevice.h
index 0c78277..2566979 100644
--- a/libopie2/opiecore/device/odevice.h
+++ b/libopie2/opiecore/device/odevice.h
@@ -1,201 +1,201 @@
 /*
                              This file is part of the Opie Project
                              Copyright (C) The Opie Team <opie-devel@handhelds.org>
               =.
             .=l.
            .>+-=
  _;:,     .>    :=|.         This program is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or  modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU Library General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This program is distributed in the hope that
      +  .  -:.       =       it will be useful,  but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
 ..}^=.=       =       ;      Library General Public License for more
 ++=   -.     .`     .:       details.
  :     =  ...= . :.=-
  -.   .:....=;==+<;          You should have received a copy of the GNU
   -_. . .   )=.  =           Library General Public License along with
     --        :-=`           this library; see the file COPYING.LIB.
                              If not, write to the Free Software Foundation,
                              Inc., 59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 */
 
 #ifndef ODEVICE_H_
 #define ODEVICE_H_
 
 /* OPIE */
 #include <opie2/odevicebutton.h>
 #include <qpe/qpeapplication.h> /* for Transformation enum.. */
 
 /* QT */
 #include <qnamespace.h>
 #include <qobject.h>
 #include <qstring.h>
 
 
 #include <qstrlist.h>
 #include <qwindowsystem_qws.h>
 
 
 class Sound;
 
 namespace Opie{
 namespace Core{
 
 class ODeviceData;
 /**
  * The available devices
  */
 enum OModel {
     Model_Unknown, // = 0
 
     Model_Series_Mask   = 0xffff0000,
 
     Model_iPAQ          = ( 1 << 16 ),
 
     Model_iPAQ_All      = ( Model_iPAQ | 0xffff ),
     Model_iPAQ_H31xx    = ( Model_iPAQ | 0x0001 ),
     Model_iPAQ_H36xx    = ( Model_iPAQ | 0x0002 ),
     Model_iPAQ_H37xx    = ( Model_iPAQ | 0x0003 ),
     Model_iPAQ_H38xx    = ( Model_iPAQ | 0x0004 ),
     Model_iPAQ_H39xx    = ( Model_iPAQ | 0x0005 ),
     Model_iPAQ_H5xxx    = ( Model_iPAQ | 0x0006 ),
     Model_iPAQ_H22xx    = ( Model_iPAQ | 0x0007 ),
     Model_iPAQ_H191x    = ( Model_iPAQ | 0x0008 ),
     Model_iPAQ_H1940    = ( Model_iPAQ | 0x0009 ),
-
+    Model_iPAQ_HX4700   = ( Model_iPAQ | 0x000A ),
     Model_Jornada       = ( 6 << 16 ),
     Model_Jornada_56x   = ( Model_Jornada | 0x0001 ),
     Model_Jornada_720   = ( Model_Jornada | 0x0002 ),
 
     Model_Zaurus        = ( 2 << 16 ),
 
     Model_Zaurus_SL5000 = ( Model_Zaurus | 0x0001 ),
     Model_Zaurus_SL5500 = ( Model_Zaurus | 0x0002 ),
     Model_Zaurus_SLA300 = ( Model_Zaurus | 0x0003 ),
     Model_Zaurus_SLB600 = ( Model_Zaurus | 0x0004 ),
     Model_Zaurus_SLC7x0 = ( Model_Zaurus | 0x0005 ),
     Model_Zaurus_SL6000 = ( Model_Zaurus | 0x0006 ),
     Model_Zaurus_SLC3000 = ( Model_Zaurus | 0x0007 ),
     Model_Zaurus_SLC1000 = ( Model_Zaurus | 0x0008 ),
     Model_Zaurus_SLC3100 = ( Model_Zaurus | 0x0009 ),
 
     Model_SIMpad        = ( 3 << 16 ),
 
     Model_SIMpad_All    = ( Model_SIMpad | 0xffff ),
     Model_SIMpad_CL4    = ( Model_SIMpad | 0x0001 ),
     Model_SIMpad_SL4    = ( Model_SIMpad | 0x0002 ),
     Model_SIMpad_SLC    = ( Model_SIMpad | 0x0003 ),
     Model_SIMpad_TSinus = ( Model_SIMpad | 0x0004 ),
 
     Model_Ramses        = ( 4 << 16 ),
 
     Model_Ramses_All    = ( Model_Ramses | 0xffff ),
     Model_Ramses_MNCI   = ( Model_Ramses | 0x0001 ),
     Model_Ramses_MNCIRX = ( Model_Ramses | 0x0002 ),
 
     Model_Yopy          = ( 5 << 16 ),
 
     Model_Yopy_All      = ( Model_Yopy | 0xffff ),
     Model_Yopy_3000     = ( Model_Yopy | 0x0001 ),
     Model_Yopy_3500     = ( Model_Yopy | 0x0002 ),
     Model_Yopy_3700     = ( Model_Yopy | 0x0003 ),
 
     Model_Beagle        = ( 6 << 16 ),
 
     Model_Beagle_All    = ( Model_Beagle | 0xffff ),
     Model_Beagle_PA100  = ( Model_Beagle | 0x0001 ),
 
     Model_GenuineIntel  = ( 7 << 16 ),
 
     Model_MyPal         = ( 8 << 16 ),
 
     Model_MyPal_All     = ( Model_MyPal | 0xffff ),
     Model_MyPal_620     = ( Model_MyPal | 0x0001 ),
     Model_MyPal_716     = ( Model_MyPal | 0x0002 ),
     Model_MyPal_730     = ( Model_MyPal | 0x0003 ),
 
     Model_HTC           = ( 9 << 16 ),
     Model_HTC_All       = ( Model_HTC | 0xffff ),
     Model_HTC_Universal = ( Model_HTC | 0x0001 )
 };
 
 /**
  * The vendor of the device
  */
 enum OVendor {
     Vendor_Unknown,
 
     Vendor_HP,
     Vendor_Sharp,
     Vendor_SIEMENS,
     Vendor_MundN,
     Vendor_GMate,
     Vendor_MasterIA,
     Vendor_GenuineIntel,
     Vendor_Asus,
     Vendor_HTC
 };
 
 /**
  * The System used
  */
 enum OSystem {
     System_Unknown,
 
     System_Familiar,
     System_Zaurus,
     System_OpenZaurus,
     System_Linupy,
     System_OpenEmbedded,
     System_PC
 };
 
 typedef struct {
     OSystem system;
     char* sysstr;
     char* sysvfile;
 } ODistribution;
 
 extern ODistribution distributions[];
 
 
 enum OLedState {
     Led_Off,
     Led_On,
     Led_BlinkSlow,
     Led_BlinkFast
 };
 
 enum OLed {
     Led_Mail,
     Led_Power,
     Led_BlueTooth
 };
 
 enum OHardKey {
     HardKey_Datebook  = Qt::Key_F9,
     HardKey_Contacts  = Qt::Key_F10,
     HardKey_Menu      = Qt::Key_F11,
     HardKey_Home      = Qt::Key_F12,
     HardKey_Mail      = Qt::Key_F13,
     HardKey_Record    = Qt::Key_F24,
     HardKey_Suspend   = Qt::Key_F34,
     HardKey_Backlight = Qt::Key_F35,
     HardKey_Action    = Qt::Key_F10,
     HardKey_OK        = Qt::Key_F11,
     HardKey_End       = Qt::Key_F12,
 };
 
 enum ODirection {
     CW   = 0,
     CCW  = 1,
     Flip = 2,
 };
diff --git a/libopie2/opiecore/device/odevice_ipaq.cpp b/libopie2/opiecore/device/odevice_ipaq.cpp
index a221e23..e6e3145 100644
--- a/libopie2/opiecore/device/odevice_ipaq.cpp
+++ b/libopie2/opiecore/device/odevice_ipaq.cpp
@@ -28,441 +28,454 @@
 */
 
 #include "odevice_ipaq.h"
 
 /* QT */
 #include <qapplication.h>
 #include <qfile.h>
 #include <qtextstream.h>
 #include <qwindowsystem_qws.h>
 
 /* OPIE */
 #include <qpe/config.h>
 #include <qpe/sound.h>
 #include <qpe/qcopenvelope_qws.h>
 
 #include <opie2/okeyfilter.h>
 #include <opie2/oresource.h>
 
 /* STD */
 #include <fcntl.h>
 #include <math.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <unistd.h>
 #ifndef QT_NO_SOUND
 #include <linux/soundcard.h>
 #endif
 
 
 using namespace Opie::Core;
 using namespace Opie::Core::Internal;
 
 /* KERNEL */
 #define OD_IOC(dir,type,number,size)    (( dir << 30 ) | ( type << 8 ) | ( number ) | ( size << 16 ))
 
 #define OD_IO(type,number)              OD_IOC(0,type,number,0)
 #define OD_IOW(type,number,size)        OD_IOC(1,type,number,sizeof(size))
 #define OD_IOR(type,number,size)        OD_IOC(2,type,number,sizeof(size))
 #define OD_IORW(type,number,size)       OD_IOC(3,type,number,sizeof(size))
 
 typedef struct {
   unsigned char OffOnBlink;       /* 0=off 1=on 2=Blink */
   unsigned char TotalTime;        /* Units of 5 seconds */
   unsigned char OnTime;           /* units of 100m/s */
   unsigned char OffTime;          /* units of 100m/s */
 } LED_IN;
 
 typedef struct {
         unsigned char mode;
         unsigned char pwr;
         unsigned char brightness;
 } FLITE_IN;
 
 #define LED_ON    OD_IOW( 'f', 5, LED_IN )
 #define FLITE_ON  OD_IOW( 'f', 7, FLITE_IN )
 
 struct i_button ipaq_buttons [] = {
     { Model_iPAQ_H31xx | Model_iPAQ_H36xx | Model_iPAQ_H37xx | Model_iPAQ_H38xx | Model_iPAQ_H39xx | Model_iPAQ_H5xxx | Model_iPAQ_H191x,
     Qt::Key_F9, QT_TRANSLATE_NOOP("Button", "Calendar Button"),
     "devicebuttons/ipaq_calendar",
     "datebook", "nextView()",
     "today", "raise()" },
     { Model_iPAQ_H31xx | Model_iPAQ_H36xx | Model_iPAQ_H37xx | Model_iPAQ_H38xx | Model_iPAQ_H39xx | Model_iPAQ_H5xxx | Model_iPAQ_H191x,
     Qt::Key_F10, QT_TRANSLATE_NOOP("Button", "Contacts Button"),
     "devicebuttons/ipaq_contact",
     "addressbook", "raise()",
     "addressbook", "beamBusinessCard()" },
     { Model_iPAQ_H31xx | Model_iPAQ_H36xx | Model_iPAQ_H37xx,
     Qt::Key_F11, QT_TRANSLATE_NOOP("Button", "Menu Button"),
     "devicebuttons/ipaq_menu",
     "QPE/TaskBar", "toggleMenu()",
     "QPE/TaskBar", "toggleStartMenu()" },
     { Model_iPAQ_H38xx | Model_iPAQ_H39xx | Model_iPAQ_H5xxx,
     Qt::Key_F13, QT_TRANSLATE_NOOP("Button", "Mail Button"),
     "devicebuttons/ipaq_mail",
     "opiemail", "raise()",
     "opiemail", "newMail()" },
     { Model_iPAQ_H31xx | Model_iPAQ_H36xx | Model_iPAQ_H37xx | Model_iPAQ_H38xx | Model_iPAQ_H39xx | Model_iPAQ_H5xxx | Model_iPAQ_H191x,
     Qt::Key_F12, QT_TRANSLATE_NOOP("Button", "Home Button"),
     "devicebuttons/ipaq_home",
     "QPE/Launcher", "home()",
     "buttonsettings", "raise()" },
     { Model_iPAQ_H31xx | Model_iPAQ_H36xx | Model_iPAQ_H37xx | Model_iPAQ_H38xx | Model_iPAQ_H39xx | Model_iPAQ_H5xxx,
     Qt::Key_F24, QT_TRANSLATE_NOOP("Button", "Record Button"),
     "devicebuttons/ipaq_record",
     "QPE/VMemo", "toggleRecord()",
     "sound", "raise()" },
 
     { Model_iPAQ_H191x,
     Qt::Key_F8, QT_TRANSLATE_NOOP("Button", "Mail Button"),
     "devicebuttons/ipaq_mail",
     "opiemail", "raise()",
     "opiemail", "newMail()" },
     { Model_iPAQ_H191x,
     Qt::Key_F7, QT_TRANSLATE_NOOP("Button", "Record Button"),
     "devicebuttons/ipaq_record",
     "QPE/VMemo", "toggleRecord()",
     "sound", "raise()" },
 
 };
 
 void iPAQ::init(const QString& model)
 {
     d->m_vendorstr = "HP";
     d->m_vendor = Vendor_HP;
 
     d->m_modelstr = model.mid(model.findRev('H'));
 
     if ( d->m_modelstr == "H3100" )
         d->m_model = Model_iPAQ_H31xx;
     else if ( d->m_modelstr == "H3600" )
         d->m_model = Model_iPAQ_H36xx;
     else if ( d->m_modelstr == "H3700" )
         d->m_model = Model_iPAQ_H37xx;
     else if ( d->m_modelstr == "H3800" )
         d->m_model = Model_iPAQ_H38xx;
     else if ( d->m_modelstr == "H3900" )
         d->m_model = Model_iPAQ_H39xx;
     else if ( d->m_modelstr == "H5400" )
         d->m_model = Model_iPAQ_H5xxx;
     else if ( d->m_modelstr == "H2200" )
         d->m_model = Model_iPAQ_H22xx;
     else if ( d->m_modelstr == "H1910" )
         d->m_model = Model_iPAQ_H191x;
     else if ( d->m_modelstr == "H1940" )
         d->m_model = Model_iPAQ_H1940;
+    else if ( d->m_modelstr == "HX4700" )
+        d->m_model = Model_iPAQ_HX4700;
+
     else
         d->m_model = Model_Unknown;
 
     switch ( d->m_model ) {
         case Model_iPAQ_H31xx:
         case Model_iPAQ_H38xx:
             d->m_rotation = Rot90;
             break;
         case Model_iPAQ_H5xxx:
         case Model_iPAQ_H22xx:
         case Model_iPAQ_H191x:
         case Model_iPAQ_H1940:
+        case Model_iPAQ_HX4700:
             d->m_rotation = Rot0;
             break;
         case Model_iPAQ_H36xx:
         case Model_iPAQ_H37xx:
         case Model_iPAQ_H39xx:
         default:
             d->m_rotation = Rot270;
             break;
 
         }
 
     m_leds [0] = m_leds [1] = Led_Off;
 
     m_power_timer = 0;
 
 }
 
 void iPAQ::initButtons()
 {
     if ( d->m_buttons )
         return;
 
     if ( isQWS( ) ) {
         addPreHandler(this);
     }
 
     d->m_buttons = new QValueList <ODeviceButton>;
 
     for ( uint i = 0; i < ( sizeof( ipaq_buttons ) / sizeof( i_button )); i++ ) {
         i_button *ib = ipaq_buttons + i;
         ODeviceButton b;
 
         if (( ib->model & d->m_model ) == d->m_model ) {
             b. setKeycode ( ib->code );
             b. setUserText ( QObject::tr ( "Button", ib->utext ));
             b. setPixmap ( OResource::loadPixmap ( ib->pix ));
             b. setFactoryPresetPressedAction ( OQCopMessage ( makeChannel ( ib->fpressedservice ), ib->fpressedaction ));
             b. setFactoryPresetHeldAction ( OQCopMessage ( makeChannel ( ib->fheldservice ), ib->fheldaction ));
 
             d->m_buttons->append ( b );
         }
     }
     reloadButtonMapping();
 }
 
 QValueList <OLed> iPAQ::ledList() const
 {
     QValueList <OLed> vl;
     vl << Led_Power;
 
     if ( d->m_model == Model_iPAQ_H38xx )
         vl << Led_BlueTooth;
     return vl;
 }
 
 QValueList <OLedState> iPAQ::ledStateList ( OLed l ) const
 {
     QValueList <OLedState> vl;
 
     if ( l == Led_Power )
         vl << Led_Off << Led_On << Led_BlinkSlow << Led_BlinkFast;
     else if ( l == Led_BlueTooth && d->m_model == Model_iPAQ_H38xx )
         vl << Led_Off; // << Led_On << ???
 
     return vl;
 }
 
 OLedState iPAQ::ledState ( OLed l ) const
 {
     switch ( l ) {
         case Led_Power:
             return m_leds [0];
         case Led_BlueTooth:
             return m_leds [1];
         default:
             return Led_Off;
     }
 }
 
 bool iPAQ::setLedState ( OLed l, OLedState st )
 {
     static int fd = ::open ( "/dev/touchscreen/0", O_RDWR | O_NONBLOCK );
 
     if ( l == Led_Power ) {
         if ( fd >= 0 ) {
             LED_IN leds;
             ::memset ( &leds, 0, sizeof( leds ));
             leds. TotalTime  = 0;
             leds. OnTime     = 0;
             leds. OffTime    = 1;
             leds. OffOnBlink = 2;
 
             switch ( st ) {
                 case Led_Off      : leds. OffOnBlink = 0; break;
                 case Led_On       : leds. OffOnBlink = 1; break;
                 case Led_BlinkSlow: leds. OnTime = 10; leds. OffTime = 10; break;
                 case Led_BlinkFast: leds. OnTime =  5; leds. OffTime =  5; break;
             }
 
             if ( ::ioctl ( fd, LED_ON, &leds ) >= 0 ) {
                 m_leds [0] = st;
                 return true;
             }
         }
     }
     return false;
 }
 
 
 bool iPAQ::filter ( int /*unicode*/, int keycode, int modifiers, bool isPress, bool autoRepeat )
 {
     int newkeycode = keycode;
 
     switch ( keycode ) {
         // H38xx/H39xx have no "Q" key anymore - this is now the Mail key
         case HardKey_Menu: {
             if (( d->m_model == Model_iPAQ_H38xx ) ||
                 ( d->m_model == Model_iPAQ_H39xx ) ||
                 ( d->m_model == Model_iPAQ_H5xxx)) {
                 newkeycode = HardKey_Mail;
             }
             break;
         }
 
         // Rotate cursor keys 180 or 270
         case Key_Left :
         case Key_Right:
         case Key_Up   :
         case Key_Down : {
             if (( d->m_model == Model_iPAQ_H31xx ) ||
                 ( d->m_model == Model_iPAQ_H38xx )) {
                 newkeycode = Key_Left + ( keycode - Key_Left + 2 ) % 4;
             }
             // Rotate the cursor keys by 270
             // keycode - Key_Left = position of the button starting from left clockwise
             // add the rotation to it and modolo. No we've the original offset
             // add the offset to the Key_Left key
             if (( d->m_model == Model_iPAQ_H5xxx ) ||
                 ( d->m_model == Model_iPAQ_H191x ) ||
                 ( d->m_model == Model_iPAQ_H1940 ))
                 newkeycode = Key_Left + ( keycode - Key_Left + 3 ) % 4;
             break;
         }
 
         // map Power Button short/long press to F6 for h191x
         case Key_F6:
             if ( d->m_model != Model_iPAQ_H191x )
                 break;
         // map Power Button short/long press to F34/F35
         case Key_SysReq: {
             if ( isPress ) {
                 if ( m_power_timer )
                     killTimer ( m_power_timer );
                 m_power_timer = startTimer ( 500 );
             }
             else if ( m_power_timer ) {
                 killTimer ( m_power_timer );
                 m_power_timer = 0;
                 QWSServer::sendKeyEvent ( -1, HardKey_Suspend, 0, true, false );
                 QWSServer::sendKeyEvent ( -1, HardKey_Suspend, 0, false, false );
             }
             newkeycode = Key_unknown;
             break;
         }
     }
 
     if ( newkeycode != keycode ) {
         if ( newkeycode != Key_unknown )
             QWSServer::sendKeyEvent ( -1, newkeycode, modifiers, isPress, autoRepeat );
         return true;
     }
     else
         return false;
 }
 
 void iPAQ::timerEvent ( QTimerEvent * )
 {
     killTimer ( m_power_timer );
     m_power_timer = 0;
     QWSServer::sendKeyEvent ( -1, HardKey_Backlight, 0, true, false );
     QWSServer::sendKeyEvent ( -1, HardKey_Backlight, 0, false, false );
 }
 
 
 void iPAQ::playAlarmSound()
 {
 #ifndef QT_NO_SOUND
     static Sound snd ( "alarm" );
     if(!snd.isFinished())
         return;
 
     changeMixerForAlarm(0, "/dev/sound/mixer", &snd );
     snd. play();
 #endif
 }
 
 bool iPAQ::setDisplayBrightness ( int bright )
 {
     bool res = false;
     int fd;
 
     if ( bright > 255 )
         bright = 255;
     if ( bright < 0 )
         bright = 0;
 
     QString cmdline;
 
     switch ( model()) {
     case Model_iPAQ_H191x:
         if ( !bright )
             cmdline = QString::fromLatin1( "echo 4 > /sys/class/backlight/pxafb/power");
         else
             cmdline = QString::fromLatin1( "echo 0 > /sys/class/backlight/pxafb/power; echo %1 > /sys/class/backlight/pxafb/brightness" ).arg( bright );
         // No Global::shellQuote as we gurantee it to be sane
         res = ( ::system( QFile::encodeName(cmdline) ) == 0 );
         break; 
+        
+    case Model_iPAQ_HX4700:
+            cmdline = QString::fromLatin1( "echo %1 > /sys/class/backlight/w100fb/brightness" ).arg( bright );
+        // No Global::shellQuote as we gurantee it to be sane
+        res = ( ::system( QFile::encodeName(cmdline) ) == 0 );
+        break; 
+        
+
     default:
         if (( fd = ::open ( "/dev/touchscreen/0", O_WRONLY )) >= 0 ) {
             FLITE_IN bl;
             bl. mode = 1;
             bl. pwr = bright ? 1 : 0;
             bl. brightness = ( bright * ( displayBrightnessResolution() - 1 ) + 127 ) / 255;
             res = ( ::ioctl ( fd, FLITE_ON, &bl ) == 0 );
             ::close ( fd );
         }
     }
     return res;
 }
 
 int iPAQ::displayBrightnessResolution() const
 {
     switch ( model()) {
         case Model_iPAQ_H31xx:
         case Model_iPAQ_H36xx:
         case Model_iPAQ_H37xx:
             return 128;     // really 256, but >128 could damage the LCD
 
         case Model_iPAQ_H38xx:
         case Model_iPAQ_H39xx:
             return 64;
         case Model_iPAQ_H5xxx:
+        case Model_iPAQ_HX4700:
             return 255;
         case Model_iPAQ_H191x:
             return 7;
         case Model_iPAQ_H1940:
             return 44;
         default:
             return 2;
     }
 }
 
 bool iPAQ::setDisplayStatus ( bool on )
 {
     bool res = false;
 
     QString cmdline;
 
     if ( model() == Model_iPAQ_H191x ) {
         cmdline = QString::fromLatin1( "echo %1 > /sys/class/lcd/pxafb/power; echo %2 > /sys/class/backlight/pxafb/power").arg( on ? "0" : "4" ).arg( on ? "0" : "4" );
     } else {
         return OAbstractMobileDevice::setDisplayStatus(on);
     }
 
     res = ( ::system( QFile::encodeName(cmdline) ) == 0 );
 
     return res;
 }
 
 bool iPAQ::hasLightSensor() const
 {
     return true;
 }
 
 int iPAQ::readLightSensor()
 {
     int fd;
     int val = -1;
 
     if (( fd = ::open ( "/proc/hal/light_sensor", O_RDONLY )) >= 0 ) {
         char buffer [8];
 
         if ( ::read ( fd, buffer, 5 ) == 5 ) {
             char *endptr;
 
             buffer [4] = 0;
             val = ::strtol ( buffer + 2, &endptr, 16 );
 
             if ( *endptr != 0 )
                 val = -1;
         }
         ::close ( fd );
     }
 
     return val;
 }
 
 int iPAQ::lightSensorResolution() const
 {
     return 256;
 }