serial_device

frog.hardware.serial_device

Provides a base class for USB serial devices.

Attributes

Classes

SerialDevice(port, baudrate)

Bases: AbstractDevice

A base class for USB serial devices.

Note that it is not sufficient for a device type class to inherit from this class alone: it must also inherit from a device base class. When doing so, this class must be listed before any other parent classes, otherwise the ABC won't be able to find this class's implementation of close() and will complain about missing functions.

Create a new serial device.

Parameters:

Name	Type	Description	Default
port	str	Description of USB port (vendor ID + product ID)	required
baudrate	int	Baud rate of port	required

Source code in frog/hardware/serial_device.py

def __init__(self, port: str, baudrate: int) -> None:
    """Create a new serial device.

    Args:
        port: Description of USB port (vendor ID + product ID)
        baudrate: Baud rate of port
    """
    # If port is unknown, it may be because the user connected the device after the
    # list of serial ports was retrieved, so we refresh the list to check if it is
    # now available. Similarly, the COM port may have changed due to the user
    # disconnecting and reconnecting the device, in which case we also need to
    # refresh the list.
    try:
        self.serial = _create_serial(port, baudrate, refresh=False)
    except SerialException:
        self.serial = _create_serial(port, baudrate, refresh=True)

Attributes

serial = _create_serial(port, baudrate, refresh=False) instance-attribute

Underlying serial device.

Functions

close()

Close the connection to the device.

Source code in frog/hardware/serial_device.py

def close(self) -> None:
    """Close the connection to the device."""
    self.serial.close()