Vmesnik za videokamero na razvojni plošči MiniZed

STARMAN, JURIJ (author), Trost, Andrej (mentor)

Cilj projekta, predstavljenega v tem magistrskem delu, je izdelava vmesnika med OV7670 slikovnim senzorjem ter MiniZed razvojno ploščo. Sliko, pridobljeno iz slikovnega senzorja, vmesnik ustrezno spremeni ter jo skupaj z nespremenjeno sliko, prikaže na VGA zaslonu. Algoritem, ki se uporablja za spreminjanje slike, lahko uporabnik izdelka poljubno spreminja. Za povezavo slikovnega senzorja z MiniZed plošče je uporabljeno t.i. OV7670-MiniZed razširitveno vezje, medtem ko je za prenašanje VGA signalov iz MiniZed plošče, uporabljeno t.i. MiniZed-VGA razširitveno vezje. Vmesnik je v celoti izdelan v vezju FPGA in njegovo delovanje je opisano v jeziku VHDL. Za zagotovitev pravilnega delovanja vmesnika, je potrebno pred uporabo na slikovnem senzorju nastaviti ustrezno frekvenco prenosa ter barvni format izhodnih podatkov. Konfiguracija OV7670 slikovnega senzorja se izvaja po I2C protokolu in je opisana v programskem jeziku C. Vmesnik porablja 80% razpoložljivega BRAM pomnilnika ter 56% razpoložljivih I/O priključkov. Poraba ostalih elementov vezja FPGA pa je nižja od 6%. Izhodni sliki se na zaslonu prikazujeta s frekvenco 62.5 Hz in ločljivostjo 320x240.

• Language: Slovenian
• Keywords: MiniZed, razširitveno vezje, FPGA, VHDL, OV7670 kamera
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2022
• PID: 20.500.12556/RUL-138136
• COBISS.SI-ID: 115003907
• Publication date in RUL: 12.07.2022

Secondary language

• Language: English
• Title: Videocamera interface on MiniZed development board

Abstract

The goal of the project, presented in this master's thesis, is to create an interface between the OV7670 image sensor and the MiniZed development board. The image obtained from the image sensor is modified and displayed alongside the unmodified image, on a VGA screen. The algorithm used to modify the image can be customized to fit the interface user's preferences. The connection between the image sensor and the MiniZed board is implemeted via the socalled OV7670-MiniZed expansion circuit, while the so-called MiniZed expansion circuit is used to transmit signals from the MiniZed board. The interface is made entirely in the FPGA curcuit, which is programmed using the VHDL language. To ensure the correct operation of the interface, it is necessary to set the appropriate transmission frequency and color format of the output data, of the image sensor. The image sensor is configured using the I2C protocol, which is implemeted in the C programming language. The interface uses 80% of the available BRAM memory and 56% of the available I/O ports. The use of other FPGA circuit elements is limited to 6%. The output images are displayed with a frequency of 62.5 Hz and a resolution of 320x240.

• Keywords: MiniZed, expansion circuit, FPGA, VHDL, OV7670 camera