I would like to know if it is possible to use assembly language to interface with the LCD screen on 8051 f120. I have searched different places, but they all use c language to use the LCD. Can you please include an example in your answer if assembly language can be used. Much appriciated
The 8051 neither knows nor cares what source language you use;
The LCD doesn't even know nor care what processor you use!
"they all use c language to use the LCD"
Assembler gives you direct acccess to the processor's instruction set - so, if it can be done at all, it can be done in assembler!
If you have 'C' code, then you have a specification of what you need to do; If your assembler skills are not up to implementing this, then you need to go back to basics with learning assembler...