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Audio Saving Module
Strašil, Ivo ; Kouřil, Jiří (referee) ; Říha, Kamil (advisor)
The aim of this thesis was to design and construct an autonomous, hardware voice recorder/player module. The device is made as a compact, built-in component for a motherboard of a target appliance. During recording, the incoming analog voice signal is converted to a digital stream by an ADC with 16 bits resolution and 24 kHz sample rate. Microcontroller LPC2103 (ARM7TDMI core) processes data, recalculates resolution and sample rate, encodes and converts to WAV format and save into a FAT/FAT32 filesystem on a Secure Digital memory card. At playback, the process is opposite: the microcontroller reads file from the memory card, decodes the stream and sends it to a DAC and then to a reconstruction filter. So there is an analog voice signal at the output again. The firmware allows control by logic inputs or by a serial bus, processing of uncompressed WAV files or WAV files with A-law or IMA ADPCM compression, continual recording including automatic freeing of card space by deleting the oldest records and a usage of a voice emphasis filter or of a signal dynamic compression circuit.
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Web Server for Embedded Applications
Pirkl, Tomáš ; Vašíček, Zdeněk (referee) ; Šimek, Václav (advisor)
This work discuses Embedded Ethernet systems. Embedded Webserver Platform is designed. This design embrace microkontroler, Ethernet driver, and external SRAM. It includes implementation on PCB with MMC interface and software implementation of MMC driver and FAT file system. Reference model ISO/OSI, reference model TCP/IP, Ethernet and UDP, TCP, IP, HTTP protocol is presented.
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Prototype of Outdoor Computer on STM32VL Discovery Platform
Leštach, Marek ; Orság, Filip (referee) ; Novotný, Tomáš (advisor)
This thesis focuses on describing of an outdoor computer prototype based on STM32VL Discovery platform and building it on the prototyping board. Prototype is able to locate itself with the help of GPS module and received data are recorded into connected MMC card formatted with the FAT filesystem. Information and trip statistics are displayed on a graphic display. Data on memory card are saved in NMEA-0183 format provided by the GPS module in order to be used with a map software on PC.
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GPS and Accelerometer Based Speedometer
Novotný, Tomáš ; Fiala, Jiří (referee) ; Orság, Filip (advisor)
This thesis deals with a design of speedometer for sportsmen, which is able to display current speed and to record a trip. The proposed parts are small enough. That's why sportsman won't be bothered much. The GPS is used for measurement of speed and to determine position. A strip, which consists of LED diodes, is used for speed displaying. The strip is situated in a sportsman's glasses. A trip is recorded to a MultiMediaCard. The FAT file system is used on the memory card.
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The Design of a USB Device
Klír, Tomáš ; Strašil, Ivo (referee) ; Hudec, Antonín (advisor)
In theoretical part of this master thesis is analyzed USB 2.0 interface, including USB OTG. Mainly are described here properties which are good to know for USB device design. In brief is given here a structure of the FAT file system. Practical part contains design of OTG Device and it’s realization including implementation of libraries for communication via USB and for working with FAT file system.
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Various File Systems Used on Different Storage Devices
Bortlová, Pavlína ; Krčma, Martin (referee) ; Lojda, Jakub (advisor)
The bachelor thesis deals with storing data on various storage devices, namely on the HDD, SSD, flash drives, SD cards. In the teoretical part are discussed principles of functions storage media and data storage structure through various file system. In the practical part was measured read and write speeds selected combinations of file systems (FAT, NTFS, XFS, ext4, btrfs, exFAT, JFFS, F2FS) and storage devices (HDD, SSD, flash drive, sd card).
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Analysis of Private Information from FAT32
Križan, Lukáš ; Rychlý, Marek (referee) ; Očenášek, Pavel (advisor)
The aim of this thesis was to create an application which can search for and recover specific files in the file system FAT32, and subsequently extract sensitive information from these files. The first part of this thesis describes the principles underlying FAT32, and focuses on how the analysed applications store information. The second part outlines the application and describes its implementation and simulations.
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Evaluation kit with ARM7
Březík, Petr ; Macho, Tomáš (referee) ; Burian, František (advisor)
The work deals with the 32-bit microcontroller with AT91SAM7X256 ARM7 core. The overall purpose of the thesis is to use the microcontroller as a data logger in Orpheus robotic system. The main part of the work focuses on detailed description of the designed board, software and development environment. A comparison of different varieties of the microcontroller with this core is included.
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Forensic Analysis of Discs and Metadata under OS Linux
Kocnová, Jitka ; Rychlý, Marek (referee) ; Očenášek, Pavel (advisor)
This bachelor's thesis is about forensic analysis of memory devices and their metadata. It's part is also an application for Linux system which focuses on restoring data from memory devices using EXT, UDF and ISO 9660 file systems; and also some examples for educational use. The application was written in the C++ language and restores files by searching for their start and end tags. The application was tested on real data and it was also compared with already existing similar applications. As a result, it was found out that the application is successful even if there is no chance to work with informations stored in journal file of EXT file system, that is used by some of the other programs the application was compared with.
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