Source code for OneInOneOutGUI.OneInOneOutGUI

"""\
OneInOneOutGUI.py

GUI controller for the OneInOneOutASCII Arduino sketch.  This interface shell
communicates over a serial port to an Arduino running a sketch which includes
line-oriented text input and output.

Copyright (c) 2015, Garth Zeglin.  All rights reserved. Licensed under the terms
of the BSD 3-clause license.

"""

from __future__ import print_function
import os, sys, argparse

# import the common GUI library over which this built
from ArduinoConsole import ArduinoConsole

#================================================================
# This requires a pySerial installation.
#  Package details: https://pypi.python.org/pypi/pyserial
#  Documentation:   http://pythonhosted.org/pyserial
import serial

################################################################
[docs]class OneInOneOutGUIController(object): """Application-specific control object to manage the GUI for OneInOneOutASCII. This class creates a generic ArduinoConsole GUI, adds application-specific GUI controls, and manages basic I/O. :param port: the name of the serial port device :param kwargs: collect any unused keyword arguments """ def __init__(self, port = None, **kwargs): # create the generic interface self.window = ArduinoConsole() # reroute printed output to the console window; this works because there is a write method defined sys.stdout = self.window # add custom interface elements. self.window.addSlider("PWM", self.pwm_slider_moved) self.window.addSlider("Servo", self.servo_slider_moved) self.window.addButton("LED On", self.led_on_button_pressed) self.window.addButton("LED Off", self.led_off_button_pressed) # add a plot window self.window.addScope() self.window.addScopeChannel('A0', color='blue', duration=20) # set up the connect/disconnect control self.window.attachConnectCallback( self._connect_disconnect ) # set up the command lin self.window.attachCommandCallback( self._command_input) # fill in the default text field for the Arduino port name if provided if port is not None: self.window.setArduinoPortName(port) # initialize connection state self.portname = port self.port = None self.input_monitor = None self.input_enabled = False self.arduino_time = 0 return #============================================================================= def _connect_disconnect(self, name, flag ): if flag: # connect if self.port is not None: print("Client already connected.") else: if name is not None and name != "": self.portname = name print("Connecting to the Arduino.") self.port = serial.Serial( self.portname, 115200, timeout=5 ) # set up an event after the Arduino has had time to boot self.window.newSingleShotTimer( 2000, self._startup_delay_complete) self.input_enabled = False # create a monitor for the serial port device connected to the Arduino to indicate when data is ready self.input_monitor = self.window.newInputMonitor( self.port.fileno(), self.port_data_ready ) else: # disconnect if self.port is not None: if self.input_monitor is not None: self.input_monitor.setEnabled(False) self.port.close() self.port = None self.input_monitor = None self.input_enabled = False else: print("Client not connected.") return def _startup_delay_complete(self): print("Arduino bootup delay complete.") self.port.flushInput() self.window.resetPlotPressed() self.input_enabled = True def _send_command(self, command): if self.port is not None: self.port.write( command + '\n') else: print("Not connected.") def _command_input(self, command): print( "User entered '%s'." % command) self._send_command(command) return #=============================================================================
[docs] def pwm_slider_moved(self, value): """Callback function activated when the PWM slider is moved.""" pwm = int(value * 255.0) print("User moved PWM slider to %d, emitting %d." % (value, pwm)) self._send_command("pwm %d" % pwm)
[docs] def servo_slider_moved(self, value): """Callback function activated when the Servo slider is moved.""" angle = int(value * 180.0) print("User moved Servo slider to %d, emitting %d." % (value, angle)) self._send_command("svo %d" % angle)
[docs] def led_on_button_pressed(self): """Callback function activated to enable the LED.""" print("User turning on LED.") self._send_command("led 1")
[docs] def led_off_button_pressed(self): """Callback function activated to disable the LED.""" print("User turning off LED.") self._send_command("led 0")
#=============================================================================
[docs] def port_data_ready(self, fd): """Callback function activated when data is received from the Arduino. This performs some basic processing of the status stream, but could be extended to handle more events. """ line = self.port.readline().rstrip() if self.window.isShowingRawData(): print("Received: '%s'" % line) if line and self.input_enabled: elements = line.split() if elements[0] == 'ana': analog_channel = int(elements[1]) analog_value = float(elements[2]) if analog_channel == 0: self.window.addScopeSamples('A0', [analog_value], [self.arduino_time]) self.window.replotScope() elif elements[0] == 'clk': self.arduino_time = 1e-6 * int(elements[1]) elif elements[0] == 'led': pass elif elements[0] == 'dig': pass elif elements[0] == 'dbg': print("Received debugging message: '%s'" % line) else: print("Unknown status message: '%s'" % line) return
#=============================================================================