This project produces a system that Handles the entire scan routine on the MCU of STC12C5A60S2. This file contains the control of the stepper motors as they move the scanner head across the entire platform. Also starts the ADC conversions for scanning light intensity using the phototransistors and sends them to MATLAB. Nothing is done until a start command is received from MATLAB, in the form of the ASCII string "start". The stop command is conversely, the ASCII string "stop"