frmtest.cpp

来自「在PXA270开发平台上」· C++ 代码 · 共 82 行

#include "frmtest.h"
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#define LED_DEV		"/dev/emdoor_8led"


/* 
 *  Constructs a frmtest which is a child of 'parent', with the 
 *  name 'name' and widget flags set to 'f' 
 *
 *  The dialog will by default be modeless, unless you set 'modal' to
 *  TRUE to construct a modal dialog.
 */
frmtest::frmtest( QWidget* parent,  const char* name, bool modal, WFlags fl )
    : Formtest( parent, name, modal, fl )
{
    DispTimer=new QTimer(this);
    connect ( btnOpen, SIGNAL(clicked()), this, SLOT(OpenDevice()));
    connect ( btnClose,SIGNAL(clicked()), this, SLOT(CloseDevice()));
    connect ( btnExit,SIGNAL(clicked()), this, SLOT(close()));
    connect (btnDisplay, SIGNAL(clicked()), this,SLOT(Display()));
    connect (btnStop, SIGNAL(clicked()), this,SLOT(StopDisplay()));
    connect ( DispTimer, SIGNAL(timeout()),this,SLOT(DisplayTimer()));
    fd=-1;
    led=0xff;
    flag=FALSE;
    
}

/*  
 *  Destroys the object and frees any allocated resources
 */
frmtest::~frmtest()
{
    if(fd>0)
    {
	::close(fd);
	fd=-1;
    }
    // no need to delete child widgets, Qt does it all for us
}
void frmtest::OpenDevice()
{
    if(fd<0)
	fd = ::open(LED_DEV, O_RDWR);
    else
	qDebug("The Device is opened!!");
    
}

void frmtest::CloseDevice()
{
    if(fd>0)
    {
	::close(fd);
	fd=-1;
    }
    	
}

void frmtest::Display()
{
    DispTimer->start(500);
}

void frmtest::StopDisplay()
{
    DispTimer->stop();
}

void frmtest::DisplayTimer()
{
    flag=!flag;
    if(flag==TRUE)
	led=0xff;
    else
	led=0x0;
    if(fd>0)
	write(fd, &led, 1);
}