[apps] Create a LED timer

Change-Id: Ice5a5fbf9fdf7b493597aa9542206372ebf0ae81

apps/Makefile

@@ -17,6 +17,7 @@ app_objs += $(addprefix apps/,\
   constant.o\
   global_preferences.o\
   i18n.o\
+  led_timer.o\
   main.o\
   math_toolbox.o\
   node.o\

apps/led_timer.cpp

@@ -0,0 +1,13 @@
+#include "led_timer.h"
+
+LedTimer::LedTimer() :
+  Timer(1),
+  m_on(false)
+{
+}
+
+void LedTimer::fire() {
+  m_on = !m_on;
+  KDColor ledColor = m_on ? KDColorRed : KDColorBlack;
+  Ion::LED::setColor(ledColor);
+}

apps/led_timer.h

@@ -0,0 +1,15 @@
+#ifndef APPS_LED_TIMER_H
+#define APPS_LED_TIMER_H
+
+#include <escher.h>
+
+class LedTimer : public Timer {
+public:
+  LedTimer();
+private:
+  void fire() override;
+  bool m_on;
+};
+
+#endif
+