1 files changed, 14 insertions, 0 deletions
diff --git a/sw-old/z80/arch/include/sleep.h b/sw-old/z80/arch/include/sleep.h
new file mode 100644
index 0000000..bd4214b
--- /dev/null
+++ b/sw-old/z80/arch/include/sleep.h
@@ -0,0 +1,14 @@
+#ifndef __SLEEP_H__
+#define __SLEEP_H__
+
+#ifndef F_CPU
+#error undefined CPU clock speed
+#endif
+
+#define SLEEP_UNIT ((F_CPU/4)/2)
+
+#include <stdint.h>
+
+void usleep(uint16_t microseconds);
+
+#endif // __SLEEP_H__
+\ No newline at end of file