state-handler: create eKey fucntionality

This commit introduces buttonHandling of esp-vent
within the StateHandler class and main().

esp-vent-main/src/esp-vent-main.cpp

@@ -16,6 +16,9 @@
 #endif
 #endif
 
+#include "DigitalIoPin.h"
+#include "StateHandler.h"
+
 #include <cr_section_macros.h>
 
 // TODO: insert other include files here
@@ -30,7 +33,7 @@ main (void)
   // Read clock settings and update SystemCoreClock variable
   SystemCoreClockUpdate ();
 #if !defined(NO_BOARD_LIB)
-  // Set up and initialize all required blocks and
+  // Set b_up_state and initialize all required blocks and
   // functions related to the board hardware
   Board_Init ();
   // Set the LED to the state of "On"
@@ -38,8 +41,43 @@ main (void)
 #endif
 #endif
 
+  DigitalIoPin b_up ();
+  DigitalIoPin b_down ();
+  DigitalIoPin b_toggle ();
+  bool b_up_state = false, b_down_state = false, b_toggle_state = false;
+
+  StateHandler ventMachine;
+
   while (1)
     {
+      if (b_up.read ())
+        b_up_state = true;
+      if (!b_up.read () && b_up_state)
+        {
+          ventMachine.HandleState (Event (Event::eKey, BUTTON_CONTROL_UP));
+          b_up_state = false;
+        }
+      if (b_down.read ())
+        b_down_state = true;
+      if (!b_down.read () && b_down_state)
+        {
+          ventMachine.HandleState (Event (Event::eKey, BUTTON_CONTROL_DOWN));
+          b_down_state = false;
+        }
+      if (b_toggle.read ())
+        b_toggle_state = true;
+      if (!b_toggle.read () && b_toggle_state)
+        {
+          ventMachine.HandleState (
+              Event (Event::eKey, BUTTON_CONTROL_TOG_MODE));
+          b_toggle_state = false;
+        }
+
+      /**
+       * TODO:
+       * - Update current pressure to eTick
+       */
+      ventMachine.HandleState (Event (Event::eTick));
     }
 
   return 0;