Module Webcam-Acquisition.src.controls

Classes

class Arduino (port)

A class used to represent a Arduino connected to the computer by a USB connection

Args

port : list of str

A list containg the name of the Arduino Serial Port

Expand source code

class Arduino():
    def __init__(self, port):
        """A class used to represent a Arduino connected to the computer by a USB connection

        Args:
            port (list of str): A list containg the name of the Arduino Serial Port
        """
        self.port = port
        self.frame_index = 0
        try:
            self.serial= serial.Serial(port, 9600, timeout=1)
            self.reset()
        except Exception:
            pass
    def open_read_serial_thread(self):
        """Start the thread responsible for reading the Arduino serial output"""
        self.acquisition_running = True
        self.read_serial_thread = Thread(target=self.read_serial)
        self.read_serial_thread.start()

    def read_serial(self):
        """Read the serial output and sets the last read line as the frame index"""
        buffer_string = ''
        while self.acquisition_running:
            buffer_string = buffer_string + self.serial.read(self.serial.inWaiting()).decode("utf-8")
            if '\n' in buffer_string:
                lines = buffer_string.split('\n')
                self.frame_index = int(lines[-2])
                buffer_string = lines[-1]

    def reset(self):
        """Send Reset command to the Arduino, which makes its pulse count 0"""
        self.serial.write("reset".encode('utf-8'))
        self.serial.read(self.serial.in_waiting)

Methods

def open_read_serial_thread(self)

Start the thread responsible for reading the Arduino serial output

Expand source code

def open_read_serial_thread(self):
    """Start the thread responsible for reading the Arduino serial output"""
    self.acquisition_running = True
    self.read_serial_thread = Thread(target=self.read_serial)
    self.read_serial_thread.start()

def read_serial(self)

Read the serial output and sets the last read line as the frame index

Expand source code

def read_serial(self):
    """Read the serial output and sets the last read line as the frame index"""
    buffer_string = ''
    while self.acquisition_running:
        buffer_string = buffer_string + self.serial.read(self.serial.inWaiting()).decode("utf-8")
        if '\n' in buffer_string:
            lines = buffer_string.split('\n')
            self.frame_index = int(lines[-2])
            buffer_string = lines[-1]

def reset(self)

Send Reset command to the Arduino, which makes its pulse count 0

Expand source code

def reset(self):
    """Send Reset command to the Arduino, which makes its pulse count 0"""
    self.serial.write("reset".encode('utf-8'))
    self.serial.read(self.serial.in_waiting)