vantaði baud rate inn í ini.

Allt virkar upp að vissu marki.

src/timer_usec.cpp

@@ -8,6 +8,15 @@ Timer_usec::Timer_usec() //= default;
 
 }
 
+void Timer_usec::set_callback(
+    callback_t callback_function,
+    void *user_data)
+{
+    callback = callback_function;
+    callback_context = user_data;
+}
+
+
 // void Timer_usec::init(uint16_t period_us) { // for custom duty cycle duration in ms in part 1
 //     TCCR1A = 0;
 //     TCCR1B = 0;