PERFORMANCE COMPARISON OF USART COMMUNICATION BETWEEN REAL TIME OPERATING SYSTEM (RTOS) AND NATIVE INTERRUPT
Abstract: Comunication
between microcontrollers is one of the crucial point in embedded sytems. On the
other hand, embedded system must be able to run many parallel task
simultaneously. To handle this, we need a reliabe system that can do a
multitasking without decreasing every task’s performance. The most widely used
methods for multitasking in embedded systems are using Interrupt Service
Routine (ISR) or using Real Time Operating System (RTOS). This research
compared perfomance of USART communication on system with RTOS to a system that
use interrupt. Experiments run on two identical development board XMega
A3BU-Xplained which used intenal sensor (light and temperature) and used servo
as external component. Perfomance comparison done by counting ping time
(elapsing time to transmit data and get a reply as a mark that data has been
received) and compare it. This experiments divided into two scenarios: (1)
system loaded with many tasks, (2) system loaded with few tasks. Result of the
experiments show that communication will be faster if system only loaded with
few tasks. System with RTOS has won from interrupt in case (1), but lose to
interrupt in case (2).
Author: Novian Habibie,
Machmud Roby Alhamidi, Dwi Marhaendro Jati Purnomo, Muhammad Febrian Rachmadi
Journal Code: jptkomputergg160005
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