I am working on 4 bit LCDisply. I want difference between thesetwo instructions : lcd_com( )& lcd_puts( ). Please give the exact difference between them with their exact defination.
These are not instructions; they are function calls Since you have said nothing about where you got these functions it is impossible to tell you anything about them at all! (one might guess, from the name, that lcd_puts should write a string to the LCD - but that's about it). If you want information about these functions, you need to consult the Documentation for them - or contact the author (or both).
i m working on 4 bit LCD. i want defination of lcd_com() function call. i got this functon from lcd 4 bit c code in google search. please give defination of this unction. shubhanajli
"i got this functon from lcd 4 bit c code in google search." That is absolutely no help to anyone whatsoever! You have the code in front of you, and you know where it came from - so look at the code, and look at the supporting information for it. If it doesn't have supporting information, keep on goggling til you find something that is properly explained! Nobody else has any idea what code you're talking about, so can't possibly comment on it!
Probably you should write your LCD driver on your own. Using code from the internet makes only sense if you are able to understand it (without asking someone else). You should also read the datasheet for you display.