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http://dx.doi.org/10.9717/kmms.2013.16.1.075

An Embedded Systems Implementation Technique based on Multiple Finite State Machine Modeling using Microcontroller Interrupts  

Lee, Sang Seol (원광대학교 전기.정보통신공학부)
Publication Information
Journal of Korea Multimedia Society / v.16, no.1, 2013 , pp. 75-86 More about this Journal
Abstract
This paper presents a technique to implement embedded systems using interrupts of the one-chip microcontroller with many peripherals based on a multiple finite state machines model. The multiple finite state machine model utilizes the structure of FSMD used for hardware design and the features of flow control by interrupts. The main finite state machine corresponds to the main program and the sub-state machines corresponds to the interrupt subroutines. Therefore, interrupts from the peripherals can be processed immediately in the sub-state machines. The request and reply variables are used to interface between the finite state machines. Additional operating system is not necessary for the context switching between the main state machine and the sub-state machine, because the flow-control caused by interrupt can be replaced with the switching. An embedded system modeled on multiple finite state machine with ASM charts can be easily implemented by the conversion of ASM charts into C-language programs. This implementation technique can be easily adopted to the hardware oriented embedded systems because of the detail description of the model and the fast response to the interrupt events in the sub-state machine.
Keywords
Embedded Systems; Microcontroller; Multiple Finite State Machines; ASM chart; FSMD;
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Times Cited By KSCI : 3  (Citation Analysis)
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