lcd n keypad interfacing with 89v51rd2

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naresh bn

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i am doing a simple project on home security system. it consists of keypad(4*4),lcd(16*2), stepper moter, uln 2003, 89v51rd2. as a begginer , i dont know how to interface the keypad,lcd,stepper motor to 89v51rd2. please suggest me how to interface. program is ready with me but i dont know the pin connections exactly, to give.
 

just search there are plenty of books and websites
these are all basic things you can get in any book on microcontroller.
how do you got a program, the program need to match with your schematics
 


naresh bn said:
program is ready with me but i dont know the pin connections exactly, to give.
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post the code, someone will be able to figure out which pins the keypad & LCD use from the code.
 

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