play-manual-square-wave-instead-of-file (#2)

Remove dependency on external raw audio file.\
Play manual square wave instead.

Reviewed-on: #2
Co-authored-by: bjoernf <bjoern.foersterling@web.de>
Co-committed-by: bjoernf <bjoern.foersterling@web.de>

time_utils.c

@@ -0,0 +1,10 @@
+#include <time.h>
+
+void sleep_ms(int milliseconds) {
+	struct timespec ts = {
+		.tv_sec = 0,
+		.tv_nsec = milliseconds * 1e6,
+	};
+
+	nanosleep(&ts, NULL);
+}