Interactive Firmata motor control notebook

Motor control.ipynb

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   "cells": [
    {
     "cell_type": "code",
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     "input": [
      "from threading import Thread\n",
      "import time\n",
      "import pyfirmata\n",
      "from IPython.html.widgets import interactive\n",
      "\n",
      "\n",
      "g_on_period = 1\n",
      "g_off_period = 1\n",
      "g_active = False\n",
      "\n",
      "\n",
      "def motor_control():\n",
      "    global g_on_period\n",
      "    global g_off_period\n",
      "    global g_active\n",
      "    \n",
      "    g_on_period = 1\n",
      "    g_off_period = 1\n",
      "    g_active = False\n",
      "    \n",
      "    board = pyfirmata.Board('/dev/ttyACM0')\n",
      "    control_pin = board.digital[13]\n",
      "    control_pin.mode = pyfirmata.OUTPUT\n",
      "    \n",
      "    while True:\n",
      "        if g_active:\n",
      "            control_pin.write(1)\n",
      "            time.sleep(g_on_period)\n",
      "            control_pin.write(0)\n",
      "            time.sleep(g_off_period)\n",
      "        else:\n",
      "            control_pin.write(0)\n",
      "            time.sleep(.1)\n",
      "            \n",
      "            \n",
      "def set_motor_parameters(on_period=1., off_period=1., active=False):\n",
      "    global g_on_period\n",
      "    global g_off_period\n",
      "    global g_active\n",
      "    \n",
      "    print on_period, off_period, active\n",
      "    g_on_period = on_period\n",
      "    g_off_period = off_period\n",
      "    g_active = active"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "control_thread = Thread(target=motor_control)\n",
      "control_thread.daemon = True\n",
      "control_thread.start()\n",
      "\n",
      "interactive(set_motor_parameters,\n",
      "            on_period=(0, 10, .01),\n",
      "            off_period=(0, 10, .01))"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
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       "stream": "stdout",
       "text": [
        "1.0 1.0 False\n"
       ]
      }
     ],
     "prompt_number": 2
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You'll need to install pyfirmata before running the notebook.

pip install pyfirmata