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/ad8232/ad8232.hpp

@@ -0,0 +1,110 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2015 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 <stdint.h>
+#include <sys/time.h>
+
+#include <mraa/gpio.hpp>
+
+#include <mraa/aio.hpp>
+
+#define AD8232_DEFAULT_AREF  3.3
+
+namespace upm {
+
+  /**
+   * @brief AD8232 Heart Rate Monitor library
+   * @defgroup ad8232 libupm-ad8232
+   * @ingroup sparkfun gpio medical
+   */
+
+  /**
+   * @library ad8232
+   * @sensor ad8232
+   * @comname AD8232 Heart Rate Monitor
+   * @type medical
+   * @man sparkfun
+   * @web https://www.sparkfun.com/products/12650
+   * @con gpio aio
+   *
+   * @brief UPM module for the AD8232 Heart Rate Monitor
+   *
+   * Note: this sensor must be driven at 3.3V only.
+   *
+   * This module simply spits out the ADC values reported by the sensor, with
+   * the intent to send that data, via serial or network port, somewhere to
+   * another piece of software running on a computer that plots the data for
+   * you, like an EKG.
+   * 
+   * Processing (https://www.processing.org/) is software
+   * that should work, using information from the SparkFun* website.
+   *
+   * This example just dumps the raw data:
+   *
+   * @image html ad8232.jpg
+   * <br><em>AD8232 Heart Rate Monitor image provided by SparkFun under
+   * <a href=https://creativecommons.org/licenses/by-nc-sa/3.0/>
+   * CC BY-NC-SA-3.0</a>.</em>
+   *
+   * @snippet ad8232.cxx Interesting
+   */
+
+  class AD8232 {
+  public:
+
+    /**
+     * AD8232 constructor
+     *
+     * @param loPlus Digital pin to use for LO+
+     * @param loMinus Digital pin to use for LO-
+     * @param output Analog pin to read the data
+     */
+    AD8232(int loPlus, int loMinus, int output, float aref=AD8232_DEFAULT_AREF);
+
+    /**
+     * AD8232 destructor
+     */
+    ~AD8232();
+
+    /**
+     * Returns the current ADC value for the device output pin.  If an
+     * LO (leads off) event is detected, 0 is returned.
+     *
+     * @return ADC value
+     */
+    int value();
+
+  private:
+    mraa::Aio m_aioOUT;
+    mraa::Gpio m_gpioLOPlus;
+    mraa::Gpio m_gpioLOMinus;
+
+    float m_aref;
+    int m_ares;
+
+  };
+}
+
+