mini2440之--leds程序

如图所示，图中用到了PushButton,GroupBox,SpinBox,PixmapLabel,TextLabel组件

led.h

#ifndef MYHELLOFORM_H

#define MYHELLOFORM_H

#include "led_base.h"

#include <qpixmap.h>

class MyLEDForm : public LEDBaseForm

{ 

    Q_OBJECT

    public:

        MyLEDForm( QWidget* parent = 0, const char* name = 0, WFlags fl = 0 );

    virtual ~MyLEDForm();

    //const QPixmap *eddy;

    private slots:

        void startSys();

void stopSys();

void OnLED();

void OffLED();

void blink1();

void blink2();

};

#endif // MYHELLOFORM_H

led.cpp

#include "led.h"

#include <qlabel.h>

#include <qpushbutton.h>

#include <qspinbox.h>

#include <qtopia/qpeapplication.h>

#include <unistd.h>

#include <sys/types.h>

#include <stdio.h>

#include <stdlib.h>

#include <sys/ioctl.h>

#include <sys/stat.h>

#include <fcntl.h>

MyLEDForm::MyLEDForm( QWidget* parent, const char* name, WFlags fl)

    :LEDBaseForm(parent, name, fl)

{

    connect(PushButton1,SIGNAL(clicked()),this,SLOT(stopSys()));

    connect(PushButton2,SIGNAL(clicked()),this,SLOT(startSys()));

    connect(PushButton3,SIGNAL(clicked()),this,SLOT(OnLED()));

    connect(PushButton4,SIGNAL(clicked()),this,SLOT(OffLED()));

    connect(PushButton5,SIGNAL(clicked()),this,SLOT(blink1()));

    connect(PushButton6,SIGNAL(clicked()),this,SLOT(blink2()));

}

MyLEDForm::~MyLEDForm()

{

    system("/etc/rc.d/init.d/leds start");

}

void MyLEDForm::stopSys()

{

    system("/etc/rc.d/init.d/leds stop");

    TextLabel1->setText("System Led is Stoped");

}

void MyLEDForm::startSys()

{

    system("/etc/rc.d/init.d/leds start");

    TextLabel1->setText("System Led is Started");

}void MyLEDForm::OnLED()

{

    int iData=SpinBox1->text().toFloat();

    int fd = ::open("/dev/leds", 0);

    ::ioctl(fd, 1, iData);

    ::close(fd); // 关闭设备

}

void MyLEDForm::OffLED()

{

    int iData=SpinBox1->text().toFloat();//取得SpinBox1上的数字

    int fd = ::open("/dev/leds", 0);

    ::ioctl(fd, 0, iData);

    ::close(fd); // 关闭设备

}

void MyLEDForm::blink1()

{

    volatile int k;

    int fd=::open("/dev/leds", 0);  // 打开设备

    for (k=0; k<4; k++)

    {

      ::ioctl(fd, 1, k);      

usleep(500000);

      ::ioctl(fd, 0, k);

usleep(500000);

    }

    ::close(fd); // 关闭设备

}

void MyLEDForm::blink2()

{

    // transfer codes from the demostration.

    // " :: "is added before each function.

    int fd = ::open("/dev/leds0", 0);

    if (fd < 0) {

fd = ::open("/dev/leds", 0);

    }

    if (fd < 0) {

::perror("open device leds");

::exit(1);

    }

    for (int k=0; k<4; k++)

    {

      ::ioctl(fd, 0, 3-k);      

usleep(500000);

      ::ioctl(fd, 1, 3-k);

usleep(500000);

    }

    ::close(fd);

}