My Note: September 2014

Qt Type Convertor

// int to QString
QString::number(int)

//

Qt Timer

3 down vote

Other way is using of built-in method start timer & event TimerEvent. Header:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
    int timerId;

protected:
    void timerEvent(QTimerEvent *event);
};

#endif // MAINWINDOW_H

Source:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    timerId = startTimer(1000);
}

MainWindow::~MainWindow()
{
    killTimer(timerId);
    delete ui;
}

void MainWindow::timerEvent(QTimerEvent *event)
{
    //qDebug() << "Update...";

    ui->label->setText(QString::number(m_count++)); 
}

Telnet server in IMX6 Linux OS

* mkdir /dev/pts
* mount -t devpts devpts /dev/pts
*telnetd -l /bin/login

TFTP Server in Ubuntu

Install following packages.
```
sudo apt-get install xinetd tftpd tftp
```

Create /etc/xinetd.d/tftp and put this entry

service tftp
{
protocol        = udp
port            = 69
socket_type     = dgram
wait            = yes
user            = nobody
server          = /usr/sbin/in.tftpd
server_args     = /tftpboot
disable         = no
}

Create a folder /tftpboot this should match whatever you gave in server_args. mostly it will be tftpboot
```
sudo mkdir /tftpboot
sudo chmod -R 777 /tftpboot
sudo chown -R nobody /tftpboot
```
Restart the xinetd service.
```
sudo /etc/init.d/xinetd restart
```
Now our tftp server is up and running.

## TFTP from Target

GET: tftp -l [local file name] -r [remote file name] -g [server Ip]

PUT: tftp -l [local file name] -r [remote file name] -p [server Ip]