embedded C, matrix board 89c52 input password and timer




File list:
exam2
....\EXAMENFINAL2
....\EXAMENFINAL2.hex
....\EXAMENFINAL2.lnp
....\EXAMENFINAL2.M51
....\EXAMENFINAL2.plg
....\EXAMENFINAL2.uvgui.MenitaBack
....\EXAMENFINAL2.uvgui_MenitaBack.bak
....\EXAMENFINAL2.uvopt
....\EXAMENFINAL2.uvproj
....\EXAMENFINAL2_uvopt.bak
....\EXAMENFINAL2_uvproj.bak
....\keypad.h
....\lcd.h
....\main.c
....\main.LST
....\main.OBJ
....\reloj.h
....\sistema.h
....\uah_irq.c
....\uah_irq.h
....\uah_types.h