grove: split code base for grove sensors into individual files

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/grove/groveslide.hpp

@@ -1,7 +1,8 @@
 /*
- * Place-holder Header for Documentation and future API change
- *
- * Copyright (c) 2014 Intel Corporation.
+ * Authors: Brendan Le Foll <brendan.le.foll@intel.com>
+ *          Mihai Tudor Panu <mihai.tudor.panu@intel.com>
+ *          Sarah Knepper <sarah.knepper@intel.com>
+ * Copyright (c) 2014 - 2016 Intel Corporation.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -22,7 +23,15 @@
  * 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.hpp>
+#include "grovebase.hpp"
+
+namespace upm {
+
 /**
  * @library grove
  * @sensor groveslide
@@ -39,4 +48,40 @@
  * @image html groveslide.jpeg
  * @snippet groveslide.cxx Interesting
  */
- 
+class GroveSlide: public Grove {
+    public:
+        /**
+         * Grove analog slide potentiometer constructor
+         *
+         * @param pin Number of the analog pin to use
+         *
+         * @param ref_voltage Reference voltage the board is set to, as a floating-point value; default is 5.0V
+         */
+        GroveSlide(unsigned int pin, float ref_voltage = 5.0);
+        /**
+         * GroveSlide destructor
+         */
+        ~GroveSlide();
+        /**
+         * Gets the raw value from the AIO pin
+         *
+         * @return Raw value from the ADC
+         */
+        float raw_value();
+        /**
+         * Gets the voltage value from the pin
+         *
+         * @return Voltage reading based on the reference voltage
+         */
+        float voltage_value();
+        /**
+         * Gets the board's reference voltage passed on object initialization
+         *
+         * @return Reference voltage the class was set for
+         */
+        float ref_voltage();
+    private:
+        mraa_aio_context m_aio;
+        float m_ref_voltage;
+};
+}