Browsing by Author "Strydom, Phillip"

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    The design and development of a 64-Bit Linux based single board computer specifically for visible light positioning
    (Stellenbosch : Stellenbosch University, 2022-04) Strydom, Phillip; Smit, Willem; Stellenbosch University. Faculty of Science. Dept. of Electrical and Electronic Engineering.
    ENGLISH SUMMARY: The University of Stellenbosch and Katholieke Universiteit Leuven currently utilise freely available single board computers (SBC) for teaching and research purposes, but updates in future hardware iterations may render current software incompatible. A custom SBC is designed specifically for the needs of both institutions. This SBC is based on the NXP i.MX8MQ ARM processor. The processor has 4 high performance ARM Cortex-A53 cores and 1 high efficiency ARM Cortex-M4F core. This work successfully implements the i.MX8MQ processor alongside 2GB of LPDDR4 memory and SD card storage. This SBC has an analogue to digital converter (ADC), 2 46-pin expansion connectors, 100Mbps Ethernet, HDMI, 2 USB 3.0 and a UART-to-USB serial debug port. The power system of this SBC provides 16 voltage rails and is capable of delivering up to 50W . This design is implemented on a 6-layer 86.36mm x 55.88mm printed circuit board (PCB). The PCB has 4mi l/4mi l minimum width and spacing and 0.2mm via holes. The layer stackup of the PCB is custom designed to meet required impedance-, crosstalk- and timing constraints. The stackup has 4 signal layers, 1 power layer and 1 ground layer. The PCB is manufactured and sub-assembled in China and completed at the University of Stellenbosch. Debugging is performed and the design is deemed to function well. A custom Linux image is compiled, loaded and found to function reliably.