light: Added light sensor C source

Added the C source for the light sensor with necessary changes to cmake,
examples, docs.

    * Renamed all files with grovelight to light
    * Replaced all instances of grovelight with light
    * Added C source for light sensor
    * Updated all cmake files
    * Added C example for light sensor
    * Split out light sensor from grove library

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/c++/CMakeLists.txt

@@ -89,7 +89,7 @@ link_directories (${MRAA_LIBDIR})
 add_example (hmc5883l)
 add_example (groveled)
 add_example (groverelay)
-add_example (grovelight)
+add_example (light)
 add_example (grovetemp)
 add_example (grovebutton)
 add_example (groverotary)

examples/c++/light.cxx

@@ -25,14 +25,14 @@
 
 #include <unistd.h>
 #include <iostream>
-#include "grove.hpp"
+#include "light.hpp"
 
 int
 main(int argc, char **argv)
 {
 //! [Interesting]
     // Create the light sensor object using AIO pin 0
-    upm::GroveLight* light = new upm::GroveLight(0);
+    upm::Light* light = new upm::Light(0);
 
     // Read the input and print both the raw value and a rough lux value,
     // waiting one second between readings

examples/c/CMakeLists.txt

@@ -99,6 +99,7 @@ add_example (mqx)
 add_example (o2)
 add_example (emg)
 add_example (gsr)
+add_example (light)
 
 # Custom examples
 add_custom_example (nmea_gps_i2c-example-c nmea_gps_i2c.c nmea_gps)

examples/c/light.c

@@ -0,0 +1,86 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 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 <signal.h>
+
+#include "light.h"
+
+bool shouldRun = true;
+
+void sig_handler(int signo)
+{
+    if (signo == SIGINT)
+        shouldRun = false;
+}
+
+int main()
+{
+    signal(SIGINT, sig_handler);
+
+    //! [Interesting]
+
+    // Instantiate a light sensor on analog pin A0
+    light_context sensor = light_init(0);
+
+    if (!sensor)
+    {
+        printf("light_init() failed.\n");
+        return -1;
+    }
+
+    // Set the aref, scale, and offset
+    light_set_aref(sensor, 5.0);
+    light_set_scale(sensor, 1.0);
+    light_set_offset(sensor, -.1);
+    printf("aRef: %0.03f scale: %0.03f offset: %0.03f\n\n",
+            light_get_aref(sensor),
+            light_get_scale(sensor),
+            light_get_offset(sensor));
+
+    // Every half a second, sample the sensor output
+    while (shouldRun)
+    {
+        float normalized = 0.0;
+        float raw_volts = 0.0;
+        float lux = 0.0;
+
+        light_get_normalized(sensor, &normalized);
+        light_get_raw_volts(sensor, &raw_volts);
+        light_get_lux(sensor, &lux);
+
+        printf("Normalized output: %0.03f, raw light sensor output: %0.03f v "
+                "light output: %0.03f lux\n", normalized, raw_volts, lux);
+
+        usleep(500000);
+    }
+
+    //! [Interesting]
+
+    printf("Exiting\n");
+
+    light_close(sensor);
+
+    return 0;
+}

examples/java/CMakeLists.txt

@@ -38,7 +38,7 @@ add_example(Emg emg)
 add_example(Gsr gsr)
 add_example(GroveLed_multiSample grove)
 add_example(GroveLEDSample grove)
-add_example(GroveLightSample grove)
+add_example(LightSample grove)
 add_example(GroveLineFinderSample grovelinefinder)
 add_example(GroveMDSample grovemd)
 add_example(GroveMoistureSample grovemoisture)

examples/java/LightSample.java

@@ -22,10 +22,10 @@
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-public class GroveLightSample {
+public class LightSample {
 	public static void main(String args[]) throws InterruptedException {
 		// ! [Interesting]
-		upm_grove.GroveLight gl = new upm_grove.GroveLight(2);
+		upm_grove.Light gl = new upm_grove.Light(2);
 
 		while (true) {
 			float raw_value = gl.raw_value();

examples/javascript/light.js

@@ -26,7 +26,7 @@
 var groveSensor = require('jsupm_grove');
 
 // Create the light sensor object using AIO pin 0
-var light = new groveSensor.GroveLight(0);
+var light = new groveSensor.Light(0);
 
 // Read the input and print both the raw value and a rough lux value,
 // waiting one second between readings

examples/python/light.py

@@ -24,7 +24,7 @@ import time
 import pyupm_grove as grove
 
 # Create the light sensor object using AIO pin 0
-light = grove.GroveLight(0)
+light = grove.Light(0)
 
 # Read the input and print both the raw value and a rough lux value,
 # waiting one second between readings