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-.. _arduino-analogwrite:
-
-analogWrite()
-=============
-
-TODO
-
-In libmaple, analogWrite is just a convenience alias for
-:ref:`pwmWrite`.  This is because PWM is not true analog output (i.e.,
-is not the output of a DAC), so the name was badly-chosen; however,
-for the sake of compatibility, the alias was provided.
-
-.. doxygenfunction:: pwmWrite
-
-Description
------------
-
-Writes an analog value
-(`PWM wave <http://arduino.cc/en/Tutorial/PWM>`_) to a pin. Can be
-used to light a LED at varying brightnesses or drive a motor at
-various speeds. After a call to **analogWrite()**, the pin will
-generate a steady square wave of the specified duty cycle until the
-next call to **analogWrite()** (or a call to **digitalRead()** or
-**digitalWrite()** on the same pin). The frequency of the PWM
-signal is approximately 490 Hz.
-
-
-
-On most Arduino boards (those with the ATmega168 or ATmega328),
-this function works on pins 3, 5, 6, 9, 10, and 11. On the Arduino
-Mega, it works on pins 2 through 13. Older Arduino boards with an
-ATmega8 only support analogWrite() on pins 9, 10, and 11. You do
-not need to call pinMode() to set the pin as an output before
-calling analogWrite().
-
-
-
-The *analogWrite* function has nothing whatsoever to do with the
-analog pins or the *analogRead* function.
-
-
-
-Syntax
-------
-
-analogWrite(pin, value)
-
-
-
-Parameters
-----------
-
-pin: the pin to write to.
-
-
-
-value: the duty cycle: between 0 (always off) and 255 (always on).
-
-
-
-Returns
--------
-
-nothing
-
-
-
-Notes and Known Issues
-----------------------
-
-The PWM outputs generated on pins 5 and 6 will have
-higher-than-expected duty cycles. This is because of interactions
-with the millis() and delay() functions, which share the same
-internal timer used to generate those PWM outputs. This will be
-noticed mostly on low duty-cycle settings (e.g 0 - 10) and may
-result in a value of 0 not fully turning off the output on pins 5
-and 6.
-
-
-
-Example
--------
-
-Sets the output to the LED proportional to the value read from the
-potentiometer.
-
-
-
-::
-
-     
-    int ledPin = 9;      // LED connected to digital pin 9
-    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 pin as output
-    }
-    
-    void loop()
-    {
-      val = analogRead(analogPin);   // read the input pin
-      analogWrite(ledPin, val / 4);  // analogRead values go from 0 to 1023, analogWrite values from 0 to 255
-    }
-
-
-
-See also
---------
-
-
--  `analogRead <http://arduino.cc/en/Reference/AnalogRead>`_\ ()
--  `Tutorial: PWM <http://arduino.cc/en/Tutorial/PWM>`_
-
-