Add virtual timer

interfaces/HwTimerInterface.h

@@ -0,0 +1,19 @@
+#ifndef __INTERFACES_HWTIMERINTERFACE_H__
+#define __INTERFACES_HWTIMERINTERFACE_H__
+
+#include <cstdint>
+
+namespace pinetime::interfaces
+{
+
+class HwTimerInterface
+{
+public:
+    virtual void enable_timer() = 0;
+    virtual void disable_timer() = 0;
+    virtual uint64_t tick() = 0;
+};
+
+}
+
+#endif

interfaces/VirtualTimerInterface.h

@@ -0,0 +1,19 @@
+#ifndef __INTERFACES_VIRTUALTIMERINTERFACE_H__
+#define __INTERFACES_VIRTUALTIMERINTERFACE_H__
+
+#include <cstdint>
+
+namespace pinetime::interfaces
+{
+
+class VirtualTimerInterface
+{
+public:
+    virtual void timer_notification(uint64_t) = 0;
+    virtual void timer_enable() = 0;
+    virtual void timer_disable() = 0;
+};
+
+}
+
+#endif