First implementation of the HR sensor using 100% foss code (ported from waspos)

src/displayapp/screens/HeartRate.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <cstdint>
+#include <chrono>
+#include "Screen.h"
+#include <bits/unique_ptr.h>
+#include <libs/lvgl/src/lv_core/lv_style.h>
+#include <libs/lvgl/src/lv_core/lv_obj.h>
+
+namespace Pinetime {
+  namespace Controllers {
+    class HeartRateController;
+  }
+  namespace Applications {
+    namespace Screens {
+
+      class HeartRate : public Screen{
+      public:
+        HeartRate(DisplayApp* app, Controllers::HeartRateController& HeartRateController);
+        ~HeartRate() override;
+
+        bool Refresh() override;
+        bool OnButtonPushed() override;
+
+      private:
+        Controllers::HeartRateController& heartRateController;
+        lv_obj_t* label_hr;
+        lv_obj_t* label_bpm;
+        lv_obj_t* label_status;
+        lv_style_t labelBigStyle;
+        lv_style_t* labelStyle;
+
+        bool running = true;
+
+      };
+    }
+  }
+}