A design of dsPIC based signal monitoring and processing system

Abstract

In this study, our objective is to develop a dsPIC based signal monitoring and processing system foranalogue signals such as physiological originated signals (ECG, EMG, EEG, etc.). Microcontrolleror microprocessor based monitoring systems can be much cheaper than PC based systems. However,the implementation of digital signal processing techniques using microcontroller is neither simple norstraight forward. The designed device consists of following hardware stages; a microcontrolleradaptor board, dsPIC development board, (128×64) graphic LCD, and (4×4) keypad. Also, there arefive different software modules which are ADC (Analog Digital Converter), FFT (Fast FourierTransform), graphic LCD, keypad, and filter programs. The proposed device takes analogue signalsvia an ADC module and processes them with dsPIC by using keypad commands and then allows toplot at graphic LCD.