--- /dev/null
+#ifndef WAIT_H
+#define WAIT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(__AVR__)
+# include <util/delay.h>
+# define wait_ms(ms) _delay_ms(ms)
+# define wait_us(us) _delay_us(us)
+#elif defined(__arm__)
+# include "wait_api.h"
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif