grove: add grove button support and examples

Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/CMakeLists.txt

 add_executable (hmc5883l-example hmc5883l.cxx)
 add_executable (groveled-example groveled.cxx)
 add_executable (grovetemp-example grovetemp.cxx)
+add_executable (grovebutton-example grovebutton.cxx)
 add_executable (groverotary-example groverotary.cxx)
 add_executable (groveslide-example groveslide.cxx)
 add_executable (lcm-lcd-example lcm-lcd.cxx)
 target_link_libraries (hmc5883l-example hmc5883l ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groveled-example grove ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (grovetemp-example grove ${CMAKE_THREAD_LIBS_INIT})
+target_link_libraries (grovebutton-example grove ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groverotary-example grove ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (groveslide-example grove ${CMAKE_THREAD_LIBS_INIT})
 target_link_libraries (lcm-lcd-example i2clcd ${CMAKE_THREAD_LIBS_INIT})

examples/grovebutton.cxx

+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.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 <unistd.h>
+#include <iostream>
+#include "grove.h"
+
+int
+main(int argc, char **argv)
+{
+    // This example uses GPIO 0
+//! [Interesting]
+
+    // Create the button object using GPIO pin 0
+    upm::GroveButton* button = new upm::GroveButton(0);
+
+    // Read the input and print, waiting one second between readings
+    while( 1 ) {
+        std::cout << button->name() << " value is " << button->value() << std::endl;
+        sleep(1);
+    }
+
+    // Delete the button object
+    delete button;
+//! [Interesting]
+
+    return 0;
+}

examples/javascript/grovebutton.js

+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.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.
+ */
+
+// Load Grove module
+var groveSensor = require('jsupm_grove');
+
+// Create the button object using GPIO pin 0
+var button = new groveSensor.GroveButton(0);
+
+// Read the input and print, waiting one second between readings
+function readButtonValue() {
+    console.log(button.name() + " value is " + button.value());
+}
+setInterval(readButtonValue, 1000);

examples/python/grovebutton.py

+# Author: Sarah Knepper <sarah.knepper@intel.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.
+
+import time
+import pyupm_grove as grove
+
+# Create the button object using GPIO pin 0
+button = grove.GroveButton(0)
+
+# Read the input and print, waiting one second between readings
+while 1:
+    print button.name(), ' value is ', button.value()
+    time.sleep(1)
+
+# Delete the button object
+del button

src/grove/grove.cxx

 {
     return m_ref_voltage;
 }
+
+//// GroveButton ////
+
+GroveButton::GroveButton(unsigned int pin)
+{
+    mraa_init();
+    m_gpio = mraa_gpio_init(pin);
+    mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
+    m_name = "Button Sensor";
+}
+
+GroveButton::~GroveButton()
+{
+    mraa_gpio_close(m_gpio);
+}
+
+std::string GroveButton::name()
+{
+    return m_name;
+}
+
+int GroveButton::value()
+{
+    return mraa_gpio_read(m_gpio);
+}

src/grove/grove.h

         float m_ref_voltage;
 };
 
+/**
+ * @brief C++ API for Grove button
+ *
+ * Very basic UPM module for Grove button
+ *
+ * @ingroup grove gpio
+ * @snippet grovebutton.cxx Interesting
+ */
+class GroveButton: public Grove {
+    public:
+        /**
+         * Grove button constructor
+         *
+         * @param gpio pin to use
+         */
+        GroveButton(unsigned int pin);
+        /**
+         * Grove button destructor
+         */
+        ~GroveButton();
+        /**
+         * Get name of sensor
+         *
+         * @return the name of this sensor
+         */
+        std::string name();
+        /**
+         * Get value from GPIO pin
+         *
+         * @return the value from the GPIO pin
+         */
+        int value();
+    private:
+        std::string m_name;
+        mraa_gpio_context m_gpio;
+};
+
 }