how to use keypad in avr

keypad
keypad\Backup Of New Project.pdsbak
keypad\Exe
keypad\Exe\keypad.hex
keypad\Exe\keypad.rom
keypad\keypad.c
keypad\keypad.cbi
keypad\keypad.cci
keypad\keypad.cof
keypad\keypad.cwp
keypad\keypad.c~
keypad\keypad.fct
keypad\keypad.prj
keypad\keypad.txt
keypad\Linker
keypad\Linker\alcd.al
keypad\Linker\alcd.ol
keypad\Linker\keypad.a
keypad\Linker\keypad.o
keypad\Linker\string.al
keypad\Linker\string.ol
keypad\List
keypad\List\keypad.asm
keypad\List\keypad.lst
keypad\List\keypad.map
keypad\New Project.pdsprj
keypad\New Project.pdsprj.DImmuBORGIR-PC.DImmuBORGIR.workspace
keypad\Obj
keypad\Obj\keypad.cof
keypad\Obj\keypad.obj
keypad\Obj\keypad.str1
keypad\Obj\keypad.sym1
keypad\Obj\keypad.sym2
keypad\Obj\keypad.sym3

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