pca9685: Adding doxygen comments and image from adafruit site

Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

src/pca9685/pca9685.h

@@ -39,11 +39,19 @@
 namespace upm {
   
   /**
-   * @brief UPM module for the PCA9685 16 channel, 12 bit pwm LED controller.
+   * @brief 16 Channel, 12 bit pwm LED controller library
    * @defgroup pca9685 libupm-pca9685
+   * @ingroup adafruit i2c led motor
    */
-
   /**
+   * @library libupm-pca9685
+   * @sensor pca9685
+   * @comname 16 Channel, 12 bit pwm LED controller
+   * @type led motor
+   * @man adafruit
+   * @web http://www.adafruit.com/products/815
+   * @con i2c
+   *
    * @brief C++ API for the PCA9685 16 channel, 12 bit pwm LED controller
    *
    * This controller is also used on the Adafruit Motor Shield v2.3
@@ -52,7 +60,7 @@ namespace upm {
    *
    * This module was tested with the Adafruit Motor Shield v2.3
    *
-   * @ingroup i2c pca9685
+   * @image html pca9685.jpg
    * @snippet pca9685.cxx Interesting
    */
   class PCA9685 {