File list (Check if you may need any files):
c5131-usb-cdc-1_0_2
...................\ATCDC.inf
...................\Atmel
...................\.....\c5131-usb-cdc-1_0_2
...................\.....\...................\c5131-usb-cdc-1_0_2.html
...................\.....\...................\changes.txt
...................\.....\...................\config.h
...................\.....\...................\doc
...................\.....\...................\...\c5131_cdc.inf
...................\.....\...................\...\doc.gif
...................\.....\...................\...\htm.gif
...................\.....\...................\...\img.gif
...................\.....\...................\...\pdf.gif
...................\.....\...................\...\txt.gif
...................\.....\...................\...\zip.gif
...................\.....\...................\index.html
...................\.....\...................\lib_board
...................\.....\...................\.........\c5131_evab.h
...................\.....\...................\.........\kbd_drv.c
...................\.....\...................\.........\kbd_drv.h
...................\.....\...................\lib_mcu
...................\.....\...................\.......\5131_drv.h
...................\.....\...................\.......\c51_drv.h
...................\.....\...................\.......\compiler.h
...................\.....\...................\.......\ext_5131.h
...................\.....\...................\.......\mcu.h
...................\.....\...................\.......\mcu_drv.h
...................\.....\...................\.......\reg_5131.h
...................\.....\...................\.......\uart
...................\.....\...................\.......\....\tools
...................\.....\...................\.......\....\.....\c51_bdr.c
...................\.....\...................\.......\....\uart_bdr.h
...................\.....\...................\.......\....\uart_lib.c
...................\.....\...................\.......\....\uart_lib.h
...................\.....\...................\.......\usb
...................\.....\...................\.......\...\uart_usb_lib.c
...................\.....\...................\.......\...\uart_usb_lib.h
...................\.....\...................\.......\...\usb_drv.c
...................\.....\...................\.......\...\usb_drv.h
...................\.....\...................\LICENSE.txt
...................\.....\...................\main.c
...................\.....\...................\main.LST
...................\.....\...................\main.OBJ
...................\.....\...................\modules
...................\.....\...................\.......\scheduler
...................\.....\...................\.......\.........\scheduler.c
...................\.....\...................\.......\.........\scheduler.h
...................\.....\...................\.......\timer_soft
...................\.....\...................\.......\..........\timer_soft.c
...................\.....\...................\.......\..........\timer_soft.h
...................\.....\...................\.......\usb_cdc_enum
...................\.....\...................\.......\............\usb_cdc_enum.c
...................\.....\...................\.......\............\usb_cdc_enum.h
...................\.....\...................\scheduler.lst
...................\.....\...................\scheduler.obj
...................\.....\...................\timer_soft.lst
...................\.....\...................\timer_soft.obj
...................\.....\...................\uart_lib.lst
...................\.....\...................\uart_lib.obj
...................\.....\...................\uart_usb_lib.lst
...................\.....\...................\uart_usb_lib.obj
...................\.....\...................\usb_cdc.aof
...................\.....\...................\usb_cdc.aof.plg
...................\.....\...................\usb_cdc.hex
...................\.....\...................\usb_cdc.lnp
...................\.....\...................\usb_cdc.M51
...................\.....\............