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Automatic generation of test questions
Cídl, Pavel ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
This project deal with automatic generation testing questions. We will find that turn-key solution problem randomly generation questions. By the help of languages HTML and PHP is created simple application susceptible data access from database: adding, editing, addition entries, etc . System further makes it possible to potluck testing questions of several perimeters and according to type generated test. Next function is generation question and correct answers in size PDF and HTML by the help of system latex.
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Realization of OFDM coder for DVB-T system
Zelinka, Petr ; Maršálek, Roman (referee) ; Frýza, Tomáš (advisor)
The contents of this thesis is a delineation of the European Standard ETSI EN 300 744 for terrestrial digital video broadcasting (DVB-T) and a description of created OFDM coder and decoder for baseband signal transmission in 2K mode without error correction capabilities. The proper function of both devices is verified by means of Matlab simulations and practically implemented into Texas Instruments’ digital signal processor TMS320C6711 using Starter Kits.
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BER Meter for Video Signals
Šimoník, Petr ; Frýza, Tomáš (referee) ; Říčný, Václav (advisor)
The diplomma thesis is dealing with possibilities of Signal to noise ratio measurement by method, which is based on direct measurement. It is chosen the most suitable method – signal and noise separation to two different parallel signal branches, where is measured signal strength in one branch and root mean square value in the other. The thesis is consisted of a concept of detail block scheme of Signal to noise ratio meter, which was designed in terms of theoretical knowledge. Particular functional blocks were circuit-designed, the active and passive parts were chosen and their function were described. There were made simulation and displayed input and output time flows. There is designed the whole connection of engineered Signal to noise ratio meter in the last part of my thesis. The double-sided board of printed circuit is contained too. It was created simple programme for supervisor micro-processor. Thereby were constructed complete bases for realization.
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IEEE802.15.4 and ZigBee technologies, examples of applications
Skládaný, Vojtěch ; Frýza, Tomáš (referee) ; Kováč, Michal (advisor)
The main goals of diploma thesis are application and realization of tool for projection and installation wireless networks according to IEEE802.15.4. The thesis is specialized in construction of transmitter and receiver device in term of mobility and visualization of data measured in terrain. Than the software support for measuring and control appropriate periphery are summarised and described. The system is defined in C programming language and uses OpenMAC library. Last part of thesis is focus on practical measurement and testing tool for projection and installation wireless network.
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Helping tool for AVR microcontrollers programming in C language
Ševčík, Radek ; Dřínovský, Jiří (referee) ; Frýza, Tomáš (advisor)
This article describes AVR Wizard programme that was developed for AVR Studio. This software simpliefies microcontrollers (MCUs) programming in a way of general peripheries settings and registers settings for varied MCUs. AVR Wizard is able to generate C language-based MCU main programme structure with chosen settings. User-friendly handling and no longer detailed studies of MCU datasheets are also main advantage.
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Communication with external devices by I2C bus
Prax, Jakub ; Šebesta, Jiří (referee) ; Frýza, Tomáš (advisor)
This diploma paper deals with the data bus line I2C and a supportive demonstration tool for the subject Microprocessor technology taught at the Radioelectronics faculty. The data bus line I2C is convenient when short-distance data transmission with restricted spatial possibilities is required but high velocity of data transmission is not necessary. The tool is compiled in such a way that enables it to also perform other tasks apart from those dealing with the I2C data bus line. The data bus line in the tool is utilized for transmission of date, time, temperature, data for the D/A converter, data from and to the EEPROM memory and data to 16 bits expander.
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Alternative methods and algorithms for flame detection
Kozubík, Kamil ; Dřínovský, Jiří (referee) ; Frýza, Tomáš (advisor)
This master’s thesis deals with flame detection methods. The purpose of the project was to create a flame detector, which uses the alternative method of flame detection. The introduction of this thesis gives the summary overview of the existing methods for flame detection. Further, the existing flame detectors and their applications are described. Two alternative algorithms for flame detection which are based on the digital signal analysis were realized on the PC. Flame detector, which utilizes the digital analysis of audio signal, was realized on 8 bit microcontroller Atmega128 and achieved results are presented.
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Wireless Security and Surveillance System
Výborný, Jiří ; Frýza, Tomáš (referee) ; Prokopec, Jan (advisor)
This Master’s thesis deals with design and construction of a wireless security and surveillance system in ZigBee wireless networks (IEEE802.15.4). The design consists of creating a star network topology with intended monitoring of home area via end device boards paired with coordinator board, which provides basic networking functionality. End device is used to send data from a temperature sensor DS1631 and magnetic reed switches to coordinator. ZigBee module ZDM-A1281-A2 made by MeshNetics company embedded on each board contains a micro controller ATMega1281 and a transceiver AT86RF230 working in a 2,4GHz frequency band. System is able to notice of any door or window move actions and too high temperature. The non-fully functional ZigBee stack, which is called an Open MAC software, based on MAC (Media Access Control ) layer and PHY (Physical) layer from MeshNetics, has been used to develop the user software. Open MAC consists of three application samples in C code. One of them was modified by the user for an application of communication between the module and sensors. The same design with module RC2204AT made by Radiocrafts company was tested as well, but it couldn’t be executed. All developed boards have been constructed and tested via Terminal PC program.
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Control of wireless ZigBee network
Fuchs, Michal ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
The Master’s Thesis deals with a ZigBee technology and its devices working each other in wireless personal area network. The ZigBee and its advantages are compared with other wireless protocols working in ISM bands. A first part deals with a topology of IEEE 802.4.15 WPAN and the ZigBee features. Types and format of the ZigBee data-frame are mentioned. A Second part of this thesis describes a design and testing of the ZigBee devices. Results of this thesis are demonstrated on ZMU (ZigBee Modules Utility) program that has been developed for the testing of this technology.
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Library for graphic objects for microcontrollers Atmel AVR and graphic displays
Skopal, Miroslav ; Frýza, Tomáš (referee) ; Fedra, Zbyněk (advisor)
This bachelor’s thesis is concerned about the graphic LCD display control by the Atmel´s AVR microprocessors. Toshiba T6963 controller is described in detail. The overall result of my bachelor’s thesis is the modular library written in C language (GCC). It provides a set of functions for simple graphic objects and controls drawing. The library is designed as a multi - layered one. It supports the usage of different LCD display controllers without any extensive program code modification.
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