هنگام استفاده از کد مثال کتابخانه با پیام خطای زیر مواجه میشم و کامپایل نمیشه.
C:\Program Files (x86)\Arduino\libraries\UTFT\DefaultFonts.c:21:14: error: variable 'SmallFont' must be const in order to be put into read-only section by means of '__attribute__((progmem))'

fontdatatype SmallFont[1144] PROGMEM={

^

C:\Program Files (x86)\Arduino\libraries\UTFT\DefaultFonts.c:125:14 : error: variable 'BigFont' must be const in order to be put into read-only section by means of '__attribute__((progmem))'

fontdatatype BigFont[3044] PROGMEM={

^

C:\Program Files (x86)\Arduino\libraries\UTFT\DefaultFonts.c:234:14 : error: variable 'SevenSegNumFont' must be const in order to be put into read-only section by means of '__attribute__((progmem))'

fontdatatype SevenSegNumFont[2004] PROGMEM={

^