my9221: rewrite to include new functionality and serve as a base class

This driver has been rewritten to support some new functionality, be
more generic and fix up some old bugs.  Multiple MY9221's can now be
chained together and are supported by the MY9221 base class.

In addition, the Grove LED Bar and Grove Circular LED drivers have
been incoporated into the my9221 library, using the new MY9221 class
as their base class.  Examples have been fixed to work with the new
library, and renamed where needed.

The current grovecircularled driver has been removed as it is now a
part of the my9221 library.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/my9221/grovecircularled.h

@@ -0,0 +1,96 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * These modules were rewritten, based on original work by:
+ *
+ * (original my9221/groveledbar)
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * (grovecircularled)
+ * Author: Jun Kato and Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * Contributions: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2014 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <string>
+#include <mraa/common.hpp>
+#include <mraa/gpio.hpp>
+#include "my9221.h"
+
+namespace upm {
+
+  /**
+   * @library my9221
+   * @sensor grovecircularled
+   * @comname Grove Circular LED
+   * @type display
+   * @man seeed
+   * @web http://www.seeedstudio.com/wiki/Grove_-_Circular_LED
+   * @con gpio
+   *
+   * @brief API for the Grove Circular LED module
+   *
+   * This is a circular LED ring based on the MY9221 chip. It is often used
+   * with a rotary encoder and has 24 controllable LEDs.
+   *
+   * @image html grovecircularled.jpg
+   * @snippet grovecircularled.cxx Interesting
+   */
+
+  class GroveCircularLED : public MY9221 {
+  public:
+    /**
+     * Instantiates an GroveCircularLED object
+     *
+     * @param dataPin Data pin
+     * @param clockPin Clock pin
+     */
+    GroveCircularLED(uint8_t dataPin, uint8_t clockPin);
+
+    /**
+     * GroveCircularLED destructor
+     */
+    ~GroveCircularLED();
+
+    /**
+     * Sets the spinner (turns off all LEDs but selected one)
+     *
+     * @param position Selected position for the spinner (0-23)
+     */
+    void setSpinner(uint8_t position);
+
+    /**
+     * Sets the lighting status
+     *
+     * @param level Selected level for the circular LED (0-23)
+     * @param direction Up or down; up is true and default
+     */
+    void setLevel(uint8_t level, bool direction=true);
+
+  protected:
+  private:
+  };
+
+}