merge libmaple docs ("leaflabs-docs") into ./docs

In the past, libample documentation was forked out of this repository
because the documentation had increased in scope. For the librambutan,
and the rambutan project in general, we will try to keep documentation
closer to the source code, so the librambutan-specific documentation
should live here. Other sections of leaflabs-docs will be culled in a
following commit.

This merge attempts to maintain history by using a subtree strategy.
Followed directions at:

    http://nuclearsquid.com/writings/subtree-merging-and-you/

Full history for files should be accessible using the "--follow" flag to
git log, eg:

    git log --follow docs/source/adc.rst

It should be possible to pull patches from leaflabs-docs with:

    git pull -s subtree leaflabs-docs master

... at least until the docs in this repository diverge significantly.

5 files changed, 272 insertions, 0 deletions

diff --git a/docs/source/lang/unimplemented/notone.rst b/docs/source/lang/unimplemented/notone.rst
new file mode 100644
index 0000000..8af878b
--- /dev/null
+++ b/docs/source/lang/unimplemented/notone.rst
@@ -0,0 +1,37 @@
+.. _lang-notone:
+
+noTone()
+========
+
+Description
+-----------
+
+Stops the generation of a square wave triggered by
+`tone <http://arduino.cc/en/Reference/Tone>`_\ (). Has no effect if
+no tone is being generated.
+
+**NOTE:** if you want to play different pitches on multiple pins,
+you need to call noTone() on one pin before calling tone() on the
+next pin.
+
+Syntax
+------
+
+noTone(pin)
+
+Parameters
+----------
+
+pin: the pin on which to stop generating the tone
+
+Returns
+-------
+
+Nothing.
+
+See Also
+--------
+
+-  `tone <http://arduino.cc/en/Reference/Tone>`_ ()
+
+.. include:: /lang/cc-attribution.txt
diff --git a/docs/source/lang/unimplemented/pulsein.rst b/docs/source/lang/unimplemented/pulsein.rst
new file mode 100644
index 0000000..2b52428
--- /dev/null
+++ b/docs/source/lang/unimplemented/pulsein.rst
@@ -0,0 +1,82 @@
+.. _lang-pulsein:
+
+pulseIn()
+=========
+
+Description
+-----------
+
+Reads a pulse (either HIGH or LOW) on a pin. For example, if
+**value** is **HIGH**, **pulseIn()** waits for the pin to go
+**HIGH**, starts timing, then waits for the pin to go **LOW** and
+stops timing. Returns the length of the pulse in microseconds.
+Gives up and returns 0 if no pulse starts within a specified time
+out.
+
+
+
+The timing of this function has been determined empirically and
+will probably show errors in longer pulses. Works on pulses from 10
+microseconds to 3 minutes in length.
+
+
+
+Syntax
+------
+
+pulseIn(pin, value)
+pulseIn(pin, value, timeout)
+
+
+
+Parameters
+----------
+
+pin: the number of the pin on which you want to read the pulse.
+(*int*)
+
+
+
+value: type of pulse to read: either
+`HIGH <http://arduino.cc/en/Reference/Constants>`_ or
+`LOW <http://arduino.cc/en/Reference/Constants>`_. (*int*)
+
+
+
+timeout (optional): the number of microseconds to wait for the
+pulse to start; default is one second (*unsigned long*)
+
+
+
+Returns
+-------
+
+the length of the pulse (in microseconds) or 0 if no pulse started
+before the timeout (*unsigned long*)
+
+
+
+Example
+-------
+
+::
+
+
+
+    int pin = 7;
+    unsigned long duration;
+
+    void setup()
+    {
+      pinMode(pin, INPUT);
+    }
+
+    void loop()
+    {
+      duration = pulseIn(pin, HIGH);
+    }
+
+
+
+
+.. include:: /lang/cc-attribution.txt
diff --git a/docs/source/lang/unimplemented/stringclass.rst b/docs/source/lang/unimplemented/stringclass.rst
new file mode 100644
index 0000000..b893e83
--- /dev/null
+++ b/docs/source/lang/unimplemented/stringclass.rst
@@ -0,0 +1,6 @@
+.. _lang-stringclass:
+
+String Class
+============
+
+.. include:: /lang/cc-attribution.txt
diff --git a/docs/source/lang/unimplemented/stringobject.rst b/docs/source/lang/unimplemented/stringobject.rst
new file mode 100644
index 0000000..e47ed7e
--- /dev/null
+++ b/docs/source/lang/unimplemented/stringobject.rst
@@ -0,0 +1,89 @@
+.. _lang-stringobject:
+
+String
+======
+
+Description
+-----------
+
+The String class, part of the core as of version 0019, allows you to
+use and manipulate strings of text in more complex ways than character
+arrays do. You can concatenate Strings, append to them, search for and
+replace substrings, and more. It takes more memory than a simple
+character array, but it is also more useful.
+
+
+
+For reference, character arrays are referred to as strings with a
+small s, and instances of the String class are referred to as
+Strings with a capital S. Note that constant strings, specified in
+"double quotes" are treated as char arrays, not instances of the
+String class.
+
+
+
+Functions
+---------
+
+
+-  `String <http://arduino.cc/en/Reference/StringConstructor>`_\ ()
+-  `charAt <http://arduino.cc/en/Reference/StringCharAt>`_\ ()
+-  `compareTo <http://arduino.cc/en/Reference/StringCompareTo>`_\ ()
+-  `concat <http://arduino.cc/en/Reference/StringConcat>`_\ ()
+-  `endsWith <http://arduino.cc/en/Reference/StringEndsWith>`_\ ()
+-  `equals <http://arduino.cc/en/Reference/StringEquals>`_\ ()
+-  `equalsIgnoreCase <http://arduino.cc/en/Reference/StringEqualsIgnoreCase>`_\ ()
+-  `getBytes <http://arduino.cc/en/Reference/StringGetBytes>`_\ ()
+-  `indexOf <http://arduino.cc/en/Reference/StringIndexOf>`_\ ()
+-  `lastIndexOf <http://arduino.cc/en/Reference/StringLastIndexOf>`_\ ()
+-  `length <http://arduino.cc/en/Reference/StringLength>`_\ ()
+-  `replace <http://arduino.cc/en/Reference/StringReplace>`_\ ()
+-  `setCharAt <http://arduino.cc/en/Reference/StringSetCharAt>`_\ ()
+-  `startsWith <http://arduino.cc/en/Reference/StringStartsWith>`_\ ()
+-  `substring <http://arduino.cc/en/Reference/StringSubstring>`_\ ()
+-  `toCharArray <http://arduino.cc/en/Reference/StringToCharArray>`_\ ()
+-  `toLowerCase <http://arduino.cc/en/Reference/StringToLowerCase>`_\ ()
+-  `toUpperCase <http://arduino.cc/en/Reference/StringToUpperCase>`_\ ()
+-  `trim <http://arduino.cc/en/Reference/StringTrim>`_\ ()
+
+
+
+Operators
+---------
+
+
+-  `[] (element access) <http://arduino.cc/en/Reference/StringBrackets>`_
+-  `+ (concatenation) <http://arduino.cc/en/Reference/StringPlus>`_
+-  `== (comparison) <http://arduino.cc/en/Reference/StringComparison>`_
+
+
+
+Examples
+--------
+
+
+-  `StringConstructors <http://arduino.cc/en/Tutorial/StringConstructors>`_
+-  `StringAdditionOperator <http://arduino.cc/en/Tutorial/StringAdditionOperator>`_
+-  `StringIndexOf <http://arduino.cc/en/Tutorial/StringIndexOf>`_
+-  `StringAppendOperator <http://arduino.cc/en/Tutorial/StringAppendOperator>`_
+-  `StringLengthTrim <http://arduino.cc/en/Tutorial/StringLengthTrim>`_
+-  `StringCaseChanges <http://arduino.cc/en/Tutorial/StringCaseChanges>`_
+-  `StringReplace <http://arduino.cc/en/Tutorial/StringReplace>`_
+-  `StringCharacters <http://arduino.cc/en/Tutorial/StringCharacters>`_
+-  `StringStartsWithEndsWith <http://arduino.cc/en/Tutorial/StringStartsWithEndsWith>`_
+-  `StringComparisonOperators <http://arduino.cc/en/Tutorial/StringComparisonOperators>`_
+-  `StringSubstring <http://arduino.cc/en/Tutorial/StringSubstring>`_
+
+
+
+See Also
+--------
+
+
+-  `Character array strings <http://arduino.cc/en/Reference/String>`_
+-  `Variable Declaration <http://arduino.cc/en/Reference/VariableDeclaration>`_
+
+
+
+
+.. include:: /lang/cc-attribution.txt
diff --git a/docs/source/lang/unimplemented/tone.rst b/docs/source/lang/unimplemented/tone.rst
new file mode 100644
index 0000000..13d581e
--- /dev/null
+++ b/docs/source/lang/unimplemented/tone.rst
@@ -0,0 +1,58 @@
+.. _lang-tone:
+
+tone()
+======
+
+Description
+-----------
+
+Generates a square wave of the specified frequency (and 50% duty
+cycle) on a pin. A duration can be specified, otherwise the wave
+continues until a call to
+`noTone <http://arduino.cc/en/Reference/NoTone>`_\ (). The pin can be
+connected to a piezo buzzer or other speaker to play tones.
+
+Only one tone can be generated at a time. If a tone is already
+playing on a different pin, the call to tone() will have no effect.
+If the tone is playing on the same pin, the call will set its
+frequency.
+
+Use of the tone() function will interfere with PWM output on pins 3
+and 11 (on boards other than the Mega).
+
+**NOTE:** if you want to play different pitches on multiple pins,
+you need to call noTone() on one pin before calling tone() on the
+next pin.
+
+Syntax
+------
+
+tone(pin, frequency)
+tone(pin, frequency, duration)
+
+Parameters
+----------
+
+pin: the pin on which to generate the tone
+
+frequency: the frequency of the tone in hertz
+
+duration: the duration of the tone in milliseconds (optional)
+
+Returns
+-------
+
+nothing
+
+See Also
+--------
+
+-  `noTone <http://arduino.cc/en/Reference/NoTone>`_\ ()
+-  `analogWrite <http://arduino.cc/en/Reference/AnalogWrite>`_\ ()
+-  `Tutorial:Tone <http://arduino.cc/en/Tutorial/Tone>`_
+-  `Tutorial:Pitch follower <http://arduino.cc/en/Tutorial/Tone2>`_
+-  `Tutorial:Simple Keyboard <http://arduino.cc/en/Tutorial/Tone3>`_
+-  `Tutorial: multiple tones <http://arduino.cc/en/Tutorial/Tone4>`_
+-  `Tutorial: PWM <http://arduino.cc/en/Tutorial/PWM>`_
+
+.. include:: /arduino-cc-attribution.txt