Original scientific paper
Realization of a digital chaotic oscillator by using a low cost microcontroller
Ercan Köse
; Mersin University
Aydın Mühürcü
; Sakarya University
Abstract
This study addresses the in-detail steps to create a chaotic oscillator having continuous-time equations using a microcontroller hardware which has a lower clock-frequency and narrower data bus, as well as much lower hardware, software and algorithm development costs compared to chaotic oscillators developed using analog circuit components or a hardware-based software platform such as FPGA. For this purpose, a Lorenz chaotic oscillator with continuous-time nonlinear equations was selected. Lorenz t-domain equations were transformed into S-domain and Z-domain respectively. After these transformations, a detailed flowchart was given to illustrate the steps required to implement the chaotic oscillator in the microcontroller. All the details derived were simulated by running simultaneous MATLAB-SIMULINK simulations. And, the performance of the discrete-time chaotic oscillator executed in the PIC18F452 microcontroller produced by the Microchip Technology Inc. was visualized by 1D and 2D graphs on an oscilloscope screen.
Keywords
microcontroller; FPGA; chaotic oscillator; discrete-time; s and z-transform; algorithm
Hrčak ID:
184823
URI
Publication date:
18.7.2017.
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