cpp_headers: Renamed C++ headers from .h -> .hpp

To make room for UPM C and C++ sensor code to coexist, all UPM
C++ headers have been renamed from h -> hpp.  This commit contains
updates to documentation, includes, cmake collateral, examples, and
swig interface files.

    * Renamed all cxx/cpp header files which contain the string
    'copyright intel' from .h -> .hpp (if not already hpp).

    * Replaced all references to .h with .hpp in documentation,
    source files, cmake collateral, example code, and swig interface
    files.

    * Replaced cmake variable module_h with module_hpp.

    * Intentionally left upm.h since this file currently does not
    contain code (documentation only).

Signed-off-by: Noel Eck <noel.eck@intel.com>

src/grovevdiv/grovevdiv.hpp

@@ -0,0 +1,98 @@
+/*
+ * Author: 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 <iostream>
+#include <stdint.h>
+#include <mraa/aio.h>
+
+// reference voltage in millivolts
+#define GROVEVDIV_VREF  4980
+
+// default ADC resolution
+#define GROVEVDIV_ADC_RES 1024
+
+namespace upm {
+  /**
+   * @brief Grove Voltage Divider Sensor library
+   * @defgroup grovevdiv libupm-grovevdiv
+   * @ingroup seeed analog electric robok
+   */
+
+  /**
+   * @library grovevdiv
+   * @sensor grovevdiv
+   * @comname Grove Voltage Divider
+   * @type electric
+   * @man seeed
+   * @con analog
+   * @kit robok
+   *
+   * @brief API for the Grove Voltage Divider Sensor
+   *
+   * UPM module for the Grove Voltage Divider sensor
+   *
+   * @image html grovevdiv.jpg
+   * @snippet grovevdiv.cxx Interesting
+   */
+  class GroveVDiv {
+  public:
+    /**
+     * Grove Voltage Divider sensor constructor
+     *
+     * @param pin Analog pin to use
+     */
+    GroveVDiv(int pin);
+
+    /**
+     * Grove Voltage Divider destructor
+     */
+    ~GroveVDiv();
+
+    /**
+     * Gets the conversion value from the sensor
+     *
+     * @param samples Specifies how many samples to average over
+     * @return Average ADC conversion value
+     */
+    unsigned int value(unsigned int samples);
+
+    /**
+     * Computes the measured voltage
+     *
+     * @param gain Gain switch, either 3 or 10 for Grove
+     * @param val Measured voltage (from value())
+     * @param vref Reference voltage in millivolts
+     * @param res ADC resolution
+     *
+     * @return Measured voltage
+     */
+    float computedValue(uint8_t gain, unsigned int val, int vref=GROVEVDIV_VREF,
+                        int res=GROVEVDIV_ADC_RES);
+
+  private:
+    mraa_aio_context m_aio;
+  };
+}