grove: split code base for grove sensors into individual files

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

src/grove/groveled.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/gpio.hpp>
+#include "grovebase.hpp"
+
+namespace upm {
+
 /**
  * @library grove
  * @sensor groveled
@@ -35,7 +44,7 @@
  * @brief API for the Grove LED
  *
  * UPM module for the Grove LED (or other similar light-emitting diodes).
- * An LED is a small lightbulb that emits light in 
+ * An LED is a small lightbulb that emits light in
  * response to a small current. The longer wire of an LED connects
  * to the positive seat (anode); the shorter wire connects to the
  * negative seat (cathode). The flat side of the bulb corresponds
@@ -45,4 +54,43 @@
  * @snippet groveled.cxx Interesting
  * @snippet groveled-multi.cxx Interesting
  */
- 
+class GroveLed: public Grove {
+    public:
+        /**
+         * Grove LED constructor
+         *
+         * @param gpio Pin to use
+         */
+        GroveLed(int pin);
+        /**
+         * Grove LED destructor
+         */
+        ~GroveLed();
+        /**
+         * Turns the LED on or off, depending on the value.
+         * If the value is positive (greater than or equal
+         * to 1), the LED is turned on.  Otherwise, for 0
+         * or negative values, the LED is turned off.
+         *
+         * @param value Tells the LED to turn on (for values >=1)
+         * or off (for values <1)
+         *
+         * @return 0 if successful, non-zero otherwise
+         */
+        mraa_result_t write(int value);
+        /**
+         * Turns the LED off
+         *
+         * @return 0 if successful, non-zero otherwise
+         */
+        mraa_result_t off();
+        /**
+         * Turns the LED on
+         *
+         * @return 0 if successful, non-zero otherwise
+         */
+        mraa_result_t on();
+    private:
+        mraa_gpio_context m_gpio;
+};
+}