Data Transmission Technologies → Ethernet over SDH

NG SDH, LCAS, Ethernet, GFP, SDH, VCAT

Ethernet and SDH technologies are focused on computer and information networks. But the main problem in their interaction is pairing constant fixed speed SDH channels with pulsating Ethernet traffic. For example, VC-4 has a speed of 149.760 Mb / s, …

Data Transmission Technologies → DELL Networking. Basics Routing Policy (Part 2)

DELL, Route-Map

Server Priority

DELL Networking - Server Priority In this example, the database server should be provided more bandwidth at a specific time to access the storage server.

Configuring VLAN interface on 1G

console#config 
console(config)#vlan 10 
console(config-vlan10)#exit 
console(config)#interface vlan 10 
console(config-if-vlan10)#ip …

Qt → Qt/C++ - Lesson 014. Dynamic creation of widgets in Qt

Qt, Dynamic widget, Динамический виджет, QPushButton

In complex projects may not be enough to have a static widget in the interface as the incoming information can change every second. Therefore the question on creation of dynamic widgets, such as the layout Qt buttons.

This tutorial describes …

AVR → Macro Assembler in the example of AVR

AVR, Assembler, macro

Macro - a set of commands and instructions that are grouped together into a single command to automate programming tasks, speed up frequently performed editing and formatting actions.

Macros can also be used to accelerate software development for microcontrollers on …

Qt → Qt/C++ - Lesson 013. QMenu – How to work with context menu in QTableView?

QMenu, QMenu example, QMenu Qt, Qt, контекстное меню, меню

To use the context menu in Qt is used QMenu class. When performing actions that should cause the menu handler is called, which creates the menu and binds handlers to act in this menu.

In this lesson, work with the …

Qt → Qt/C++ - Lesson 012. QShortcut – How to work with Hot Keys in Qt?

QShortcut, QShortcut example, Qt

Even in the official documentation on the topic QShortcut written not so much, so it's probably a note not to forget, not a full-fledged article. Just a few words about how to connect QShortcut entity that will be responsible for …

Qt → Qt/C++ - Lesson 007. Filter for records in QSqlTableModel

QSqlRelationalTableModel, фильтр, QSqlTableModel, QSqlTableModel example

Continuing to work with tables to Qt, we would like to spent the time, how to install the filter on the model of data representation in QSqlTableModel or QSqlRelationalTableModel . Therefore, the program code of the tutorial on QSqlTableModel was …

Qt → Qt/C++ - Lesson 011. XML files in Qt – Reading and Writing

QXmlStreamWriter, Qt, XML, xml example, QXmlStreamReader

Qt development tools include functionality for working with XML files, which allows you to create XML files and read them, which may be useful to create the automatic creation of XML markup software, configuration files, using XML, or for parsing …

AVR → USI in Attiny24 - settings of Two-wire mode

Attiny24, USI

USI - Universal Serial Interface (Universal Serial Interface) is actually a workpiece for hardware serial transmit and receive data. This interface is not a ready-made solution for some specific data transmission protocol, but provides a more convenient way to transfer …

Qt → Qt/C++ - Lesson 010. QSplitter – how to add splitter?

QPallete, QSplitter, QSplitter color, QSplitter example, Qt

Qualitative layout always increases application usability, and this is true for all kinds of applications, from desktop to mobile. One such interface elements, which can improve usability is QSplitter class, which is an object-type layout with a movable divider that …

AVR → MUL - multiplication operation in AVR Attiny

Attiny, MUL

MUL - multiplication instruction in microcontrollers, is present, for example, microcontrollers Atmega. But not all AVR microcontrollers there is hardware support multiplication of functions. For example, in microcontrollers Attiny MUL team simply does not exist, so the solution to this …

AVR → BCD format in Assembler in AVR Atmega

BCD, Atmega

Decimal numbers machine language may be represented in the form of eight-bit sequences of ones and zeros, that is bytes. However, there are two types of presentation formats decimal numbers. It is packed format (BCD), and unpacked.

Uncompressed format

In …