FreescaleK60单片机USB模块源程序，分层很清楚

Ch12-PRG(USB)\K60MCU-USBDevice\USBDevice\.cproject
.............\................\.........\.cwGeneratedFileSetLog
.............\................\.........\.project
.............\................\.........\rseHostSettingsCache.xml
.............\................\.........\SaAnalysispointsManager.apconfig
.............\................\.........\工程说明
.............\................\.........\Sources\includes.h
.............\................\.........\.......\isr.c
.............\................\.........\.......\main.c
.............\................\.........\.......\MCUabout\common.c
.............\................\.........\.......\........\common.h
.............\................\.........\.......\........\MK60N512VMD100.h
.............\................\.........\.......\........\sysinit.c
.............\................\.........\.......\........\sysinit.h
.............\................\.........\.......\........\vectors.c
.............\................\.........\.......\........\vectors.h
.............\................\.........\.......\hwComponent\Wdog\wdog.c
.............\................\.........\.......\...........\....\wdog.h
.............\................\.........\.......\...........\USB\hw_usb.c
.............\................\.........\.......\...........\...\hw_usb.h
.............\................\.........\.......\...........\.ART\hw_uart.c
.............\................\.........\.......\...........\....\hw_uart.h
.............\................\.........\.......\...........\GPIO\hw_gpio.c
.............\................\.........\.......\...........\....\hw_gpio.h
.............\................\.........\.......\GPIOapplication\Light\light.c
.............\................\.........\.......\...............\.....\light.h
.............\................\.........\Project_Settings\SaAnalysispointsManager.apconfig
.............\................\.........\................\.tartup_Code\crt0.s
.............\................\.........\................\............\start.c
.............\................\.........\................\Linker_Files\128KB_ram.lcf
.............\................\.........\................\............\512KB_flash.lcf
.............\................\.........\................\Debugger\init_kinetis.tcl
.............\................\.........\................\........\K60_MK60N512VMD100_INTERNAL_FLASH_PnE OSJTAG.launch
.............\................\.........\................\........\K60_MK60N512VMD100_INTERNAL_FLASH_PnE OSJTAG.pemicro
.............\................\.........\................\........\K60_MK60N512VMD100_INTERNAL_FLASH_Segger J-Link.launch
.............\................\.........\................\........\K60_MK60N512VMD100_INTERNAL_RAM_PnE OSJTAG.launch
.............\................\.........\................\........\K60_MK60N512VMD100_INTERNAL_RAM_Segger J-Link.launch
.............\................\.........\................\........\mass_erase_kinetis.tcl
.............\................\.........\................\........\MK60N512VMD100.mem
.............\................\.........\................\........\MK60N512VMD100.ttf
.............\................\.........\MK60N512VMD100_INTERNAL_RAM\makefile
.............\................\.........\...........................\makefile.local
.............\................\.........\...........................\objects.mk
.............\................\.........\...........................\SDHC.args
.............\................\.........\...........................\sources.mk
.............\................\.........\...........................\Sources\isr.args
.............\................\.........\...........................\.......\main.args
.............\................\.........\...........................\.......\subdir.mk
.............\................\.........\...........................\.......\MCUabout\common.args
.............\................\.........\...........................\.......\........\subdir.mk
.............\................\.........\...........................\.......\........\sysinit.args
.............\................\.........\...........................\.......\........\vectors.args
.............\................\.........\...........................\.......\hwComponent\Wdog\subdir.mk
.............\................\.........\...........................\.......\...........\....\wdog.args
.............\................\.........\...........................\.......\...........\USB\hw_usb.args
.............\................\.........\...........................\.......\...........\...\subdir.mk
.............\................\.........\...........................\.......\...........\.ART\hw_uart.args
.............\................\.........\...........................\.......\...........\....\subdir.mk
.............\................\.........\...........................\.......\...........\GPIO\hw_gpio.args
.............\................\.........\...........................\.......\...........\....\subdir.mk
.............\................\.........\...........................\.......\GPIOapplication\Light\light.args
.............\................\.........\...........................\.......\...............\.....\subdir.mk
.............\................\.........\...........................\Project_Settings\Startup_Code\crt0.args
.............\................\.........\...........................\................\............\start.args
.............\................\.........\...........................\................\............\subdir.mk
.............\................\.........\...........................\................\Linker_Files\subdir.mk
.............\................\.........\........................FLASH\makefile
.............\................\.........\.............................\makefile.local
.............\................\.........\.............................\objects.mk
.............\................\.........\.............................\sources.mk
.............\................\.........\.............................\USBDevice.afx
.............\................\.........\.............................\USBDevice.afx.hex
.............\................\.........\.............................\USBDevice.afx.S19
.............\................\.........\.............................\USBDevice.afx.xMAP
.............\................\.........\.............................\USBDevice.args
.............\................\.........\.............................\Sources\isr.args
.............\................\.........\.............................\.......\isr.d
.............\................\.........\.............................\.......\isr.obj
.............\................\.........\.............................\.......\main.args
.............\................\.........\.............................\.......\main.d
.............\................\.........\.............................\.......\main.obj
.............\................\.........\.............................\.......\subdir.mk
.............\................\.........\.............................\.......\MCUabout\common.args
.............\................\.........\.............................\.......\........\common.d
.............\................\.........\.............................\.......\........\common.obj
.............\................\.........\.............................\.......\........\subdir.mk
.............\................\.........\.............................\.......\........\sysinit.args
.............\................\.........\.............................\.......\........\sysinit.d
.............\................\.........\.............................\.......\........\sysinit.obj
.............\................\.........\.............................\.......\........\vectors.args
.............\................\.........\.............................\.......\........\vectors.d
.............\................\.........\.............................\.......\........\vectors.obj
.............\................\.........\.............................\.......\hwComponent\Wdog\subdir.mk
.............\................\.........\.............................\.......\...........\....\wdog.args
.............\................\.........\.............................\.......\...........\....\wdog.d
.............\................\.........\.............................\.......\...........\....\wdog.obj
.............\................\.........\.............................\.......\...........\USB\hw_usb.args
.............\................\.........\.............................\.......\...........\...\hw_usb.d
.............\................\.........\.............................\.......\...........\...\hw_usb.obj
.............\................\.........\.............................\.......\...........\...\subdir.mk