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+/*
+ * Author: Sarah Knepper <sarah.knepper@intel.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/gpio.hpp>
+
+namespace upm {
+/**
+ * @brief TTP223 Touch Detector Sensor library
+ * @defgroup ttp223 libupm-ttp223
+ * @ingroup seeed gpio touch
+ */
+/**
+ * @library ttp223
+ * @sensor ttp223
+ * @comname TTP223 Touch Sensor
+ * @altname Grove Touch Sensor
+ * @type touch
+ * @man seeed
+ * @web http://www.seeedstudio.com/depot/Grove-Touch-Sensor-p-747.html
+ * @con gpio
+ *
+ * @brief API for the TTP223 Touch Sensor
+ * 
+ *   This touch sensor detects when a finger is near the metallic pad
+ *   by the change in capacitance. It can replace a more traditional push
+ *   button. The touch sensor can still function when placed under a 
+ *   non-metallic surface like glass or plastic.
+ *
+ * @image html ttp223.jpg
+ * @snippet ttp223.cxx Interesting
+ */
+class TTP223 {
+    public:
+        /**
+         * TTP223 constructor
+         *
+         * @param pin GPIO pin where the sensor is connected
+         */
+        TTP223(unsigned int pin);
+
+        /**
+         * TTP223 destructor
+         */
+        ~TTP223();
+
+        /**
+         * Returns the name of this sensor
+         *
+         * @return Name of this sensor
+         */
+        std::string name();
+
+        /**
+         * Gets the value from the GPIO pin
+         *
+         * @return Value from the GPIO pin
+         */
+        int value();
+
+        /**
+         * Determines whether the touch sensor is being touched
+         *
+         * @return True if touched, false otherwise
+         */
+        bool isPressed();
+
+        /**
+         * Installs an interrupt service routine (ISR) to be called when
+         * the button is activated or deactivated.
+         *
+         * @param fptr Pointer to a function to be called on interrupt
+         * @param arg Pointer to an object to be supplied as an
+         * argument to the ISR.
+         */
+#if defined(SWIGJAVA) || defined(JAVACALLBACK)
+        void installISR(mraa::Edge level, jobject runnable);
+#else
+        void installISR(mraa::Edge level, void (*isr)(void *), void *arg);
+#endif
+        /**
+         * Uninstalls the previously installed ISR
+         *
+         */
+        void uninstallISR();
+
+    protected:
+#if defined(SWIGJAVA) || defined(JAVACALLBACK)
+        void installISR(mraa::Edge level, void (*isr)(void *), void *arg);
+#endif
+        std::string         m_name; //!< name of this sensor
+        mraa_gpio_context   m_gpio; //!< GPIO pin
+        bool                m_isrInstalled;
+};
+
+}