I want to add OLED library in keil 5 I looked around but I did not get the library files and the procedure to add in keil.
Any help will be gratefull.
Do you probably mean the emWin graphics library that is part of the Middleware component?
emWin User Guide & Reference Manual (keil.com)
MDK-Middleware: Overview (keil.com)
Graphics Component: Graphics Component (keil.com)