GENERATING A PULSE-WIDTH MODULATED SIGNAL BY MEANS OF TIMER MODULE INTERRUPT OF PIC18F2550 MCU
Journal Title: Aerospace Research in Bulgaria - Year 2017, Vol 29, Issue
Abstract
The article hereby examines an approach towards pulse-width modulated (PWM) signal generation by means of PIC18F2550 microcontroller unit (MCU). The proposed technique employs the so-called internal interrupt by timer module. This solution may come into use in process automation as a terminal device, for instance putting in motion a servo motor. Although the MCU provides a hardware PWM module, it is dependant of the crystal oscillator frequency. Most of the time, it is difficult to generate a PWM signal at low frequencies. The proposed solution is shown to be versatile enough and suitable to actuate servomotors widely used in RC hobby activities. Special attention is given to the MCU software peculiarities. Additional computer simulation has also been made. The used software was MikroC Pro for PIC and Proteus VMS. The proposed solution has been shown to operate with sufficient precision. The source code is also included in the present article.
Authors and Affiliations
Konstantin Metodiev
Keywords
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- EP ID EP363253
- DOI 10.7546/AeReBu.29.18.01.12
- Views 35
- Downloads 0
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GENERATING A PULSE-WIDTH MODULATED SIGNAL BY MEANS OF TIMER MODULE INTERRUPT OF PIC18F2550 MCU
The article hereby examines an approach towards pulse-width modulated (PWM) signal generation by means of PIC18F2550 microcontroller unit (MCU). The proposed technique employs the so-called internal interrupt by timer mo...