Rotary: Added C source

Added C source for rotary angle sensor

    * Renamed all files from groverrotary to rotary
    * Replaced all instances of groverrotary with rotary
    * Added C source for rotary angle sensor
    * Updated all CMake files

Signed-off-by: Sisinty Sasmita Patra <sisinty.s.patra@intel.com>

src/rotary/rotary.hpp

@@ -0,0 +1,108 @@
+/*
+ * Authors: Brendan Le Foll <brendan.le.foll@intel.com>
+ *          Mihai Tudor Panu <mihai.tudor.panu@intel.com>
+ *          Sarah Knepper <sarah.knepper@intel.com>
+ * Copyright (c) 2014 - 2016 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/aio.hpp>
+
+#include "rotary.hpp"
+
+namespace upm {
+
+/**
+ * @library rotary
+ * @sensor rotary
+ * @comname Grove Rotary Angle Sensor
+ * @altname Rotary Potentiometer
+ * @type ainput
+ * @man seeed
+ * @con analog
+ * @kit gsk
+ *
+ * @brief API for the Rotary Angle Sensor (Knob)
+ *
+ * Basic UPM module for the rotary angle sensor (knob) on analog. Provides
+ * a set of functions to read the absolute pin value, degrees or radians, and another set
+ * to do the same relative to the center of the knob's range.
+ *
+ * @image html rotary.jpeg
+ * @snippet rotary.cxx Interesting
+ */
+class Rotary{
+    public:
+        /**
+         * Grove rotary angle sensor constructor
+         *
+         * @param pin Number of the analog pin to use
+         */
+        Rotary(unsigned int pin);
+        /**
+         * Rotary destructor
+         */
+        ~Rotary();
+        /**
+         * Gets the absolute raw value from the AIO pin
+         *
+         * @return Unsigned value from the ADC
+         */
+        float abs_value();
+        /**
+         * Gets absolute raw degrees from the AIO pin
+         *
+         * @return Unsigned degrees from the ADC
+         */
+        float abs_deg();
+        /**
+         * Gets absolute raw radians from the AIO pin
+         *
+         * @return Unsigned radians from the ADC
+         */
+        float abs_rad();
+        /**
+         * Gets the relative value from the AIO pin
+         *
+         * @return Signed value from the ADC
+         */
+        float rel_value();
+        /**
+         * Gets relative degrees from the AIO pin
+         *
+         * @return Signed degrees from the ADC
+         */
+        float rel_deg();
+        /**
+         * Gets relative radians from the AIO pin
+         *
+         * @return Signed radians from the ADC
+         */
+        float rel_rad();
+        std::string name(){ return "Rotary Angle Sensor";}
+    private:
+        mraa_aio_context m_aio;
+        static const int m_max_angle = 300;
+};
+}