Usage

To create a new HDLC controller instance, you need to call the HDLController class with two parameters:

hdlc_c = HDLController(read_func, write_func)

The first parameter is a function used to read from the serial bus while the second parameter is a function used to write on it. For example, using the pyserial module:

ser = serial.Serial('/dev/ttyACM0')

def read_serial():
    return ser.read(ser.in_waiting)

hdlc_c = HDLController(read_serial, ser.write)

To start the reception thread:

hdlc_c.start()

To send a new data frame:

hdlc_c.send('Hello world!')

And to get the next received data frame available in the HDLController internal queue:

data = hdlc_c.get_data()

The get_data() method will block until a new data frame is available.

Finally, to stop all the HDLController threads:

hdlc_c.stop()