chore: clenaup

include/rom.h

@@ -0,0 +1,12 @@
+#ifndef ROM_H
+#define ROM_H
+
+#include <stdint.h>
+
+extern uint32_t DiagPrintf(const char *fmt, ...)
+    __attribute__((format(printf, 1, 2)));
+extern void DelayMs(uint32_t ms);
+
+#define printf DiagPrintf
+
+#endif  // ROM_H