http://kei321test.googlecode.com/svn-history/r15/trunk/
中，有对应的源码：
kei321test – Revision 15: /trunk
- ..
- STARTUP.A51
- USB_Configuration.h
- USB_Descriptor.c
- USB_Descriptor.h
- USB_HID_Requests.c
- USB_HID_Requests.h
- USB_INT_to_HID_Type.h
- USB_ISR.c
- USB_ISR.h
- USB_Register.h
- USB_Standard_Requests.c
- USB_Standard_Requests.h
- bitop.h
- c8051f321_code_generation.cwg
- config.h
- ev.c
- ev.h
- ev_timer.c
- ev_timer.h
- flash_rw.c
- flash_rw.h
- init_code.c
- interrupt.c
- main.c
- obj/
- test.c
- tp06ca.Opt
- tp06ca.Uv2
- tp06ca.plg
- type.h
- uart.c
- uart.h