Example: ds1808lc C++ example

Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

examples/c++/CMakeLists.txt

@@ -241,6 +241,7 @@ add_example (apds9930)
 add_example (kxcjk1013)
 add_example (ssd1351)
 add_example (bme280)
+add_example (ds1808lc)
 
 # These are special cases where you specify example binary, source file and module(s)
 include_directories (${PROJECT_SOURCE_DIR}/src)

examples/c++/ds1808lc.cxx

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <iostream>
+#include <string>
+#include "ds1808lc.h"
+
+#define EDISON_I2C_BUS 1            // Edison I2C-1
+#define DS1808_GPIO_PWR 15          // Edison GP165
+
+void printState(upm::ILightController *lightController)
+{
+   if (lightController->isPowered())
+   {
+      std::cout << "Light is powered, brightness = " << lightController->getBrightness() << std::endl;
+   }
+   else
+   {
+      std::cout << "Light is not powered." << std::endl;
+   }
+}
+
+int main( int argc, char **argv )
+{
+   int status = 0;
+   upm::ILightController* lightController;
+
+   try {
+      lightController = new upm::DS1808LC(DS1808_GPIO_PWR, EDISON_I2C_BUS);
+      std::cout <<  "Existing state: "; printState(lightController);
+      if (argc == 2)
+      {
+         std::string arg = argv[1];
+         int brightness = ::atoi(argv[1]);
+         if (brightness > 0) {
+            lightController->setPowerOn();
+            lightController->setBrightness(brightness);
+         } else
+            lightController->setPowerOff();
+      }
+      std::cout <<  "Now: ";printState(lightController);
+   } catch (std::exception& e) {
+      std::cout << "Error: " << e.what() << std::endl;
+      status = 1;
+   }
+
+   delete lightController;
+   return status;
+}
+
+

src/hlg150h/hlg150h.cxx

@@ -15,8 +15,6 @@ HLG150H::HLG150H(int pinRelay, int pinPWM)
    this->pinRelay = pinRelay;
    isPoweredShadow = false;
    pwmBrightness = new mraa::Pwm(pinPWM);
-   if (pwmBrightness == NULL)
-      UPM_THROW("pwm init failed");
    status = pwmBrightness->enable(true);
    status = pwmBrightness->period_us(PWM_PERIOD);
    if (status != mraa::SUCCESS)