Microcontroller › 8051 › INTERFACING OF KEYPAD WITH 8051 MICROCONTROLLER (AT89C51). › code in assembly
u can get the assembly the assembly code from ‘MAZIDI’ a book to learn programing of 8051 in assembly and c.
if u want i can send u it’s ebook on your mail send your email_id for it.
programing in assembly is quite difficult so u should first learn it in C