grovelinefinder: Initial implementation

This module adds support for the Grove Line Finder sensor.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Zion Orent <zorent@ics.com>
Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>

src/grovelinefinder/CMakeLists.txt

@@ -0,0 +1,5 @@
+set (libname "grovelinefinder")
+set (libdescription "upm grove line finder sensor module")
+set (module_src ${libname}.cxx)
+set (module_h ${libname}.h)
+upm_module_init()

src/grovelinefinder/grovelinefinder.cxx

@@ -0,0 +1,56 @@
+/*
+ * 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.
+ */
+
+#include <iostream>
+
+#include "grovelinefinder.h"
+
+using namespace upm;
+using namespace std;
+
+GroveLineFinder::GroveLineFinder(int pin)
+{
+  if ( !(m_gpio = mraa_gpio_init(pin)) )
+    {
+      cerr << __FUNCTION__ << ": mraa_gpio_init() failed" << endl;
+      return;
+    }
+
+  mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
+}
+
+GroveLineFinder::~GroveLineFinder()
+{
+  mraa_gpio_close(m_gpio);
+}
+
+bool GroveLineFinder::whiteDetected()
+{
+  return (!mraa_gpio_read(m_gpio) ? true : false);
+}
+
+bool GroveLineFinder::blackDetected()
+{
+  return (mraa_gpio_read(m_gpio) ? true : false);
+}

src/grovelinefinder/grovelinefinder.h

@@ -0,0 +1,71 @@
+/*
+ * 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 <mraa/gpio.h>
+
+namespace upm {
+
+  /**
+   * @brief C++ API for the Grove Line Finder sensor
+   *
+   * UPM module for the Grove Line Finder sensor.  It outputs a
+   * digital signal indicating whether it is detecting black on a
+   * white background, or white on a black background.
+   *
+   * @ingroup gpio
+   * @snippet grovelinefinder.cxx Interesting
+   */
+  class GroveLineFinder {
+  public:
+    /**
+     * Grove Line Finder digital sensor constructor
+     *
+     * @param pin digital pin to use
+     */
+    GroveLineFinder(int pin);
+    /**
+     * GroveLineFinder Destructor
+     */
+    ~GroveLineFinder();
+    /**
+     * Determine whether white has been detected
+     *
+     * @return True if white is being detected
+     */
+    bool whiteDetected();
+    /**
+     * Determine whether black has been detected
+     *
+     * @return True if black is being detected
+     */
+    bool blackDetected();
+
+  private:
+    mraa_gpio_context m_gpio;
+  };
+}
+
+

src/grovelinefinder/jsupm_grovelinefinder.i

@@ -0,0 +1,8 @@
+%module jsupm_grovelinefinder
+%include "../upm.i"
+
+%{
+    #include "grovelinefinder.h"
+%}
+
+%include "grovelinefinder.h"

src/grovelinefinder/pyupm_grovelinefinder.i

@@ -0,0 +1,9 @@
+%module pyupm_grovelinefinder
+%include "../upm.i"
+
+%feature("autodoc", "3");
+
+%include "grovelinefinder.h"
+%{
+    #include "grovelinefinder.h"
+%}