micropython: add micropython component

components/language/micropython/docs/pyboard/tutorial/lcd_skin.rst

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+The LCD and touch-sensor skin
+=============================
+
+Soldering and using the LCD and touch-sensor skin.
+
+.. image:: img/skin_lcd_1.jpg
+    :alt: pyboard with LCD skin
+    :width: 250px
+
+.. image:: img/skin_lcd_2.jpg
+    :alt: pyboard with LCD skin
+    :width: 250px
+
+The following video shows how to solder the headers onto the LCD skin.
+At the end of the video, it shows you how to correctly connect the LCD skin to the pyboard.
+
+.. raw:: html
+
+    <iframe style="margin-left:3em;" width="560" height="315" src="http://www.youtube.com/embed/PowCzdLYbFM?rel=0" frameborder="0" allowfullscreen></iframe>
+
+For circuit schematics and datasheets for the components on the skin see :ref:`hardware_index`.
+
+Using the LCD
+-------------
+
+To get started using the LCD, try the following at the MicroPython prompt.
+Make sure the LCD skin is attached to the pyboard as pictured at the top of this page. ::
+
+    >>> import pyb
+    >>> lcd = pyb.LCD('X')
+    >>> lcd.light(True)
+    >>> lcd.write('Hello uPy!\n')
+
+You can make a simple animation using the code::
+
+    import pyb
+    lcd = pyb.LCD('X')
+    lcd.light(True)
+    for x in range(-80, 128):
+        lcd.fill(0)
+        lcd.text('Hello uPy!', x, 10, 1)
+        lcd.show()
+        pyb.delay(25)
+
+Using the touch sensor
+----------------------
+
+To read the touch-sensor data you need to use the I2C bus.  The
+MPR121 capacitive touch sensor has address 90.
+
+To get started, try::
+
+    >>> import pyb
+    >>> i2c = pyb.I2C(1, pyb.I2C.CONTROLLER)
+    >>> i2c.mem_write(4, 90, 0x5e)
+    >>> touch = i2c.mem_read(1, 90, 0)[0]
+
+The first line above makes an I2C object, and the second line
+enables the 4 touch sensors.  The third line reads the touch
+status and the ``touch`` variable holds the state of the 4 touch
+buttons (A, B, X, Y).
+
+There is a simple driver `here <http://micropython.org/resources/examples/mpr121.py>`__
+which allows you to set the threshold and debounce parameters, and
+easily read the touch status and electrode voltage levels.  Copy
+this script to your pyboard (either flash or SD card, in the top
+directory or ``lib/`` directory) and then try::
+
+    >>> import pyb
+    >>> import mpr121
+    >>> m = mpr121.MPR121(pyb.I2C(1, pyb.I2C.CONTROLLER))
+    >>> for i in range(100):
+    ...   print(m.touch_status())
+    ...   pyb.delay(100)
+    ...
+
+This will continuously print out the touch status of all electrodes.
+Try touching each one in turn.
+
+Note that if you put the LCD skin in the Y-position, then you need to
+initialise the I2C bus using::
+
+    >>> m = mpr121.MPR121(pyb.I2C(2, pyb.I2C.CONTROLLER))
+
+There is also a demo which uses the LCD and the touch sensors together,
+and can be found `here <http://micropython.org/resources/examples/lcddemo.py>`__.