Adding all files from Project 1 to start

include/timer_usec.h

@@ -0,0 +1,9 @@
+#ifndef TIMER_USEC_H
+#define TIMER_USEC_H
+#include <avr/io.h>
+
+struct Timer_usec {
+    Timer_usec();
+    void init(uint16_t period_us);
+};
+#endif