display.cpp

在ARM9和ARMLinux下利用QT编写的实时数据采集

    screenSec = new Screen( this, "screenSec" );
	screenSec->setYTitle( QObject::tr( "Vlure 2" ) );
    //screenSec->setMinimumSize( QSize( 100, 100 ) );
    //screenSec->setFrameShape( QFrame::StyledPanel );
    //screenSec->setFrameShadow( QFrame::Raised );
    layout1->addWidget( screenSec );

    screenThr = new Screen( this, "screenThr" );
	screenThr->setYTitle( QObject::tr( "Vlure 3" ) );
    //screenThr->setSizePolicy( QSizePolicy( (QSizePolicy::SizeType)5, (QSizePolicy::SizeType)5, 0, 0, screenThr->sizePolicy().hasHeightForWidth() ) );
    //screenThr->setMinimumSize( QSize( 100, 100 ) );
    //screenThr->setFrameShape( QFrame::StyledPanel );
    //screenThr->setFrameShadow( QFrame::Raised );
    layout1->addWidget( screenThr );

    DisplayWidgetLayout->addMultiCellLayout( layout1, 0, 1, 2, 2 );

    startButton = new QPushButton( this, "startButton" );
    startButton->setAutoDefault( FALSE );
    startButton->setDefault( TRUE );
	connect( startButton, SIGNAL( clicked () ), SLOT( start() ) );

    DisplayWidgetLayout->addWidget( startButton, 2, 0 );

    labelPixmap = new QLabel( this, "labelPixmap" );
    //labelPixmap->setPixmap( image0 );
	labelPixmap->setPixmap( QPixmap("qtlogo.bmp")  );

    DisplayWidgetLayout->addMultiCellWidget( labelPixmap, 0, 0, 0, 1 );

    stopButton = new QPushButton( this, "stopButton" );
	connect( stopButton, SIGNAL( clicked () ), SLOT( stop() ) );

    DisplayWidgetLayout->addWidget( stopButton, 2, 1 );
    QSpacerItem* spacer = new QSpacerItem( 31, 300, QSizePolicy::Minimum, QSizePolicy::Expanding );
    DisplayWidgetLayout->addItem( spacer, 1, 1 );

    layout5 = new QHBoxLayout( 0, 0, 6, "layout5"); 

    layout2 = new QVBoxLayout( 0, 0, 6, "layout2"); 

    labelFir = new QLabel( this, "labelFir" );
    labelFir->setAlignment( int( QLabel::AlignCenter ) );
    layout2->addWidget( labelFir );

    lineEditFir = new QLineEdit( this, "lineEditFir" );
    lineEditFir->setReadOnly( TRUE );
    layout2->addWidget( lineEditFir );
    layout5->addLayout( layout2 );

    layout3 = new QVBoxLayout( 0, 0, 6, "layout3"); 

    labelSec = new QLabel( this, "labelSec" );
    labelSec->setAlignment( int( QLabel::AlignCenter ) );
    layout3->addWidget( labelSec );

    lineEditSec = new QLineEdit( this, "lineEditSec" );
	lineEditSec->setReadOnly( TRUE );
    layout3->addWidget( lineEditSec );
    layout5->addLayout( layout3 );

    layout4 = new QVBoxLayout( 0, 0, 6, "layout4"); 

    labelThr = new QLabel( this, "labelThr" );
    labelThr->setAlignment( int( QLabel::AlignCenter ) );
    layout4->addWidget( labelThr );

    lineEditThr = new QLineEdit( this, "lineEditThr" );
	lineEditThr->setReadOnly( TRUE );
    layout4->addWidget( lineEditThr );
    layout5->addLayout( layout4 );

    DisplayWidgetLayout->addLayout( layout5, 2, 2 );
    languageChange();
    resize( QSize(630, 450).expandedTo(minimumSizeHint()) );
    //setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
    clearWState( WState_Polished );

	yval[0] = 0.0;
	yval[1] = 0.0;
	yval[2] = 0.0;
	ADFile = new QFile( ADC_DEV );
	//readFile();
}

/*
 *  Destroys the object and frees any allocated resources
 */
DisplayWidget::~DisplayWidget()
{
    // no need to delete child widgets, Qt does it all for us
}

/*
 *  Sets the strings of the subwidgets using the current
 *  language.
 */
void DisplayWidget::languageChange()
{
    setCaption( tr( "Cureve" ) );
    startButton->setText( tr( "&Start" ) );
    startButton->setAccel( QKeySequence( tr( "Alt+S" ) ) );
    labelPixmap->setText( QString::null );
    stopButton->setText( tr( "Sto&p" ) );
    stopButton->setAccel( QKeySequence( tr( "Alt+P" ) ) );
    labelFir->setText( tr( "First Curve" ) );
    labelSec->setText( tr( "Second Curve" ) );
    labelThr->setText( tr( "Thrid Curve" ) );
}

void DisplayWidget::run()
{
	//screen->initNumber();
	//screen->initCordinate();
    if ( !timer ) {
	timer = new QTimer( this );
	connect( timer, SIGNAL( timeout() ), SLOT( tick() ) );
    }
    
    
    timer->start( 1000 );
}


void DisplayWidget::tick()
{
/*
	//time += 2;
	yval = readCurveDate();
    	//screen->animate(time, yval);
	screenFir->animate( yval );
	screenSec->animate( yval );
	screenThr->animate( yval );
	lineEditFir->setText( QString::number( yval ) );
	lineEditSec->setText( QString::number( yval ) );
	lineEditThr->setText( QString::number( yval ) );
*/
	for(int i=0; i<=2; i++)
    	{//采样0~2路A/D值
		yval[i]=((float)GetADresult(i)*3.3)/1024.0;
		printf("a%d=%8.4f\t",i,yval[i]);
   	 }
	//screenFir->animate( yval[0] );
	//screenSec->animate( yval[1] );
	//screenThr->animate( yval[2] );
	screenFir->animate( yval[0]*25 );
	screenSec->animate( yval[1]*25 );
	screenThr->animate( yval[2]*25 );
	lineEditFir->setText( QString::number( yval[0] ) );
	lineEditSec->setText( QString::number( yval[1] ) );
	lineEditThr->setText( QString::number( yval[2] ) );

}

void DisplayWidget::start()
{
/*
	//int adc_fd;
	if((adc_fd=open(ADC_DEV, O_RDWR))<0){
		printf("Error opening %s adc device\n", ADC_DEV);
		return -1;
	}
*/
	ADFile->open( IO_ReadWrite );
	run();
}
void DisplayWidget::stop()
{
	//close( adc_fd );
	
	timer->stop();
	ADFile->close();
}

QSize DisplayWidget::sizeHint() const
{
	//return QSize( 16 * Margin, 12 * Margin );
	return QSize( 20 * Margin, 15 * Margin );
}

int DisplayWidget::GetADresult(int channel)
{
	int PRESCALE=0XFF;
	int data;		//=ADC_WRITE(channel, PRESCALE);
	data=ADC_WRITE(channel, PRESCALE);
	//write(adc_fd, &data, sizeof(data));
	//read(adc_fd, &data, sizeof(data));
	ADFile->writeBlock( (char *)(&data), sizeof(int) );
	ADFile->readBlock( (char *)(&data), sizeof(int) );
	return (data);
}

/*
void DisplayWidget::readFile()
{
	QFile file("in.txt");
	file.open(IO_ReadOnly);
	QTextStream in(&file);	
	str = in.read();
	strlist = QStringList::split(" ", str);
	it = strlist.begin();	
}

double DisplayWidget::readCurveDate( )
{
	QString tempStr;
	double tempDate;
	

	tempStr =(QString) *it;
	tempDate = tempStr.toDouble();
	
	if (it != strlist.end())
	{	
		++it;
		//cerr<<"time=108"<<endl;	
	}
	else
	{
		it = strlist.begin();
		//cerr<<"time=109"<<endl;	
	}
	//cerr<<"curveDate ="<<tempDate<<endl;
	return tempDate;
}
*/