1 files changed, 52 insertions, 0 deletions
diff --git a/source/wirish/pwmwrite.rst b/source/wirish/pwmwrite.rst
new file mode 100644
index 0000000..b1f0515
--- /dev/null
+++ b/source/wirish/pwmwrite.rst
@@ -0,0 +1,52 @@
+.. highlight:: cpp
+
+.. _wirish-pwmwrite:
+
+pwmWrite()
+==========
+
+Writes a :ref:`PWM wave <pwm>` to a pin.  You can use this to make an
+LED get brighter or dimmer, control a servomotor, etc. After a call to
+pwmWrite(), the pin will output a steady square wave with the given
+duty cycle.  You can change the duty cycle later by calling pwmWrite()
+again with the same pin and a different duty.
+
+.. contents:: Contents
+   :local:
+
+Library Documentation
+---------------------
+
+.. doxygenfunction:: pwmWrite
+
+Example
+-------
+
+Sets the output to the LED proportional to the value read from the
+potentiometer (adapted for Maple from the Arduino `analogWrite()
+reference <http://www.arduino.cc/en/Reference/AnalogWrite>`_\ )::
+
+     
+    int ledPin = 13;      // LED connected to pin 13 (Maple-specific)
+    int analogPin = 3;    // potentiometer connected to analog pin 3
+    int val = 0;          // variable to store the read value
+    
+    void setup() {
+      pinMode(ledPin, OUTPUT);   // sets the LED pin as output
+
+      pinMode(analogPin, PWM);   // sets the potentiometer pin as PWM
+                                 // output (Maple-specific)
+    }
+    
+    void loop() {
+      val = analogRead(analogPin);   // read the input pin
+
+      analogWrite(ledPin, val / 16);  // analogRead values go from 0 to 4095,
+                                      // analogWrite values from 0 to 65535
+                                      // (Maple-specific)
+    }
+
+See Also
+--------
+
+-  :ref:`Maple PWM tutorial <pwm>`