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Energy Aware RTOS for EFM32
Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Computer and Information Science.
2011 (English)MasteroppgaveStudent thesis
Abstract [en]

Power consumption is a major concern for portable or battery-operated devices. Recently, new low power consumption techniques have been used to achieve acceptable autonomy battery-powered systems. FreeRTOS is a real-time kernel designed especially for embedded low-power MCUs. Energy Micro develops and sells energy friendly microcontrollers based on the industry leading ARM Cortex-M3 32-bit architecture. The aim of this thesis is to propose a new FreeRTOS Tickless Framework solution that exploits the power modes provided by EFM32. Three different solutions have been proposed, such as FreeRTOS RTC, FreeRTOS Tickless with prescaling and FreeRTOS Tickless without prescaling. The simulations showed that the Tickless Framework saves energy from 15x to 44x more than Original version of FreeRTOS. Using a self-made benchmark the battery (1500 mAh) lifetime has been increased from 11 days to 487 days.

Place, publisher, year, edition, pages
Institutt for datateknikk og informasjonsvitenskap , 2011. , 167 p.
Keyword [no]
ntnudaim:6102, MTDT datateknikk, Komplekse datasystemer
URN: urn:nbn:no:ntnu:diva-13918Local ID: ntnudaim:6102OAI: diva2:444235
Available from: 2011-09-28 Created: 2011-09-28

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