Realization of a digital chaotic oscillator by using a low cost microcontroller
Ercan Köse, Aydın Mühürcü · University of Zagreb University Computing Centre (SRCE) · 2017
This study addresses the in-detail steps to create a chaotic oscillator with continuous-time equations using microcontroller hardware with a little lower clock-frequency and narrower data bus, utilized at 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.Besides, the performance of the discrete-time chaotic oscillator was executed in the PIC18F452 microcontroller, produced by the Microchip Technology Inc. and visualized in 1D and 2D graphs on an oscilloscope screen.