-void __xprintf(const prog_char *format, ...); /* Send formatted string to the registered device */\r
-void __xsprintf(char*, const prog_char *format, ...); /* Put formatted string to the memory */\r
-void __xfprintf(void(*func)(uint8_t), const prog_char *format, ...); /* Send formatted string to the specified device */\r
+void __xprintf(const char *format_p, ...); /* Send formatted string to the registered device */\r
+void __xsprintf(char*, const char *format_p, ...); /* Put formatted string to the memory */\r
+void __xfprintf(void(*func)(uint8_t), const char *format_p, ...); /* Send formatted string to the specified device */\r