mini2440之--adc程序

如图所示，用到的组块：TextLabel,LCDNumber,Pixmap Label,Group Box,PushButton

adc.h

#ifndef MYHELLOFORM_H

#define MYHELLOFORM_H

#include "adc_base.h"

#include <qpixmap.h>

class MyADCForm : public ADCBaseForm

{ 

    Q_OBJECT

    public:

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

	    virtual ~MyADCForm();

	    //const QPixmap *eddy;

		int fd;

    private slots:

        void startADC();

	void stopADC();

};

#endif // MYHELLOFORM_H

adc.cpp

#include "adc.h"

#include <qlabel.h>

#include <qpushbutton.h>

#include <qspinbox.h>

#include <qlcdnumber.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>

*/

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <sys/ioctl.h>

#include <fcntl.h>

#include <linux/fs.h>

#include <errno.h>

#include <string.h>

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

	    :ADCBaseForm(parent, name, fl)

{

fd=0;

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

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

}

MyADCForm::~MyADCForm()

{

	::close(fd);

}

void MyADCForm::startADC()

{

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

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

	if (fd < 0) {

		::exit(1);

	}

	for(int num=0;num<20;num++) {

		char buffer[30];

		int len = ::read(fd, buffer, sizeof buffer -1);

		if (len > 0) {

			buffer[len] = '\0';

			int value = -1;

			sscanf(buffer, "%d", &value);

			//printf("ADC Value: %d\n", value);

			LCDNumber1->display(value);

		} else	::exit(1);

		usleep(500* 1000);

		LCDNumber2->display(num);

	}

	::close(fd);

}void MyADCForm::stopADC()

{

::close(fd);

}