grovegsr: initial implementation

This module implements support for the Grove GSR (Galvanic Skin
Response) sensor.

Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: John Van Drasek <john.r.van.drasek@intel.com>

src/grovegsr/CMakeLists.txt

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+set (libname "grovegsr")
+set (libdescription "upm grovegsr galvanic skin response sensor module")
+set (module_src ${libname}.cxx)
+set (module_h ${libname}.h)
+upm_module_init()

src/grovegsr/grovegsr.cxx

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+/*
+ * Author: Zion Orent <zorent@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.
+ */
+
+#include <iostream>
+
+#include "grovegsr.h"
+
+using namespace upm;
+using namespace std;
+
+GroveGSR::GroveGSR(int pin)
+{
+    if ( !(m_aio = mraa_aio_init(pin)) )
+    {
+      cerr << __FUNCTION__ << ": mraa_aio_init() failed" << endl;
+      return;
+    }
+}
+
+GroveGSR::~GroveGSR()
+{
+  mraa_aio_close(m_aio);
+}
+
+void GroveGSR::calibrate()
+{
+	sleep(1);
+	int val, threshold, sum = 0;
+
+	for(int i=0; i<500; i++)
+	{
+		val = mraa_aio_read(m_aio);
+		sum += val;
+		usleep(5000);
+	}
+	threshold = sum / 500;
+	cout << "Threshold = " << threshold << endl;
+}
+
+int GroveGSR::value()
+{
+	int val = mraa_aio_read(m_aio);
+	return val;
+}

src/grovegsr/grovegsr.h

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+/*
+ * Author: Zion Orent <zorent@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 <string>
+#include <mraa/aio.h>
+
+namespace upm {
+  /**
+   * @brief UPM module for the GroveGSR Galvanic Skin Response Sensor
+   * @defgroup grovegsr libupm-grovegsr
+   */
+  /**
+   * @brief C++ API for the GroveGSR Galvanic Skin Response Sensor
+   * 
+   * Measure the electrical conductance of skin in order
+   * to measure strong emotional reaction.
+   * In other words, it measures sweat on your fingers
+   * as an indicator of strong emotional reactions.
+   *
+   * @ingroup analog grovegsr
+   * @snippet grovegsr.cxx Interesting
+   */
+  class GroveGSR {
+  public:
+    /**
+     * GroveGSR sensor constructor
+     *
+     * @param pin analog pin to use
+     */
+    GroveGSR(int pin);
+    /**
+     * GroveGSR Destructor
+     */
+    ~GroveGSR();
+
+    /**
+     * Calibrate the GroveGSR Sensor
+     */
+    void calibrate();
+
+    /**
+     * Measure the electrical conductance of the skin from the sensor
+     *
+     * @return the electrical conductance of the skin
+     */
+    int value();
+
+  private:
+    mraa_aio_context m_aio;
+  };
+}
+
+

src/grovegsr/jsupm_grovegsr.i

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+%module jsupm_grovegsr
+%include "../upm.i"
+
+%{
+    #include "grovegsr.h"
+%}
+
+%include "grovegsr.h"

src/grovegsr/pyupm_grovegsr.i

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+%module pyupm_grovegsr
+%include "../upm.i"
+
+%feature("autodoc", "3");
+
+%include "grovegsr.h"
+%{
+    #include "grovegsr.h"
+%}