Merge branch 'master' into debug-serialusb.

Chose debug-serialusb version in cases of conflict.

Conflicts:
	libmaple/usb/usb_callbacks.c

1 files changed, 45 insertions, 0 deletions

diff --git a/docs/source/lang/api/loop.rst b/docs/source/lang/api/loop.rst
new file mode 100644
index 0000000..d8f6183
--- /dev/null
+++ b/docs/source/lang/api/loop.rst
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+.. highlight:: cpp
+
+.. _lang-loop:
+
+loop()
+======
+
+After creating a :ref:`setup() <lang-setup>` function, which
+initializes your sketch, the ``loop()`` function gets called
+repeatedly, allowing your program to change and respond.  Use it to
+actively control your Maple board.
+
+Example
+-------
+
+::
+
+
+    int buttonPin = 38;
+
+    // setup initializes serial and the button pin
+    void setup() {
+      SerialUSB.begin();
+      pinMode(buttonPin, INPUT);
+    }
+
+    // loop() checks the button pin each time it executes,
+    // and will print 'H' if it is pressed, 'L' otherwise
+    void loop() {
+      if (digitalRead(buttonPin) == HIGH) {
+        SerialUSB.println('H');
+      } else {
+        SerialUSB.println('L');
+      }
+
+      delay(1000);
+    }
+
+See Also
+--------
+
+- :ref:`setup() <lang-setup>`
+
+
+.. include:: cc-attribution.txt