RTC code/data

include/string_util.h

@@ -1,6 +1,16 @@
 #ifndef GUARD_STRING_UTIL_H
 #define GUARD_STRING_UTIL_H
 
+#include "global.h"
+
+#define CHAR_SPACE          0x00
+#define CHAR_QUESTION_MARK  0xAC
+#define CHAR_HYPHEN         0xAE
+#define CHAR_COLON          0xF0
+#define EXT_CTRL_CODE_BEGIN 0xFC // extended control code
+#define PLACEHOLDER_BEGIN   0xFD // string placeholder
+#define EOS                 0xFF // end of string
+
 enum StringConvertMode
 {
     STR_CONV_MODE_LEFT_ALIGN,