It is from the disk of a USB2.0 development board which I bought, it contains a total of five compressed files, more than 10 examples, I believe it is useful for us.

PubModule
.........\EEPROM.c
.........\EEPROM.h
.........\IO.c
.........\IO.h
.........\Key.c
.........\Key.h
.........\Led.c
.........\Led.h
.........\OTimer.c
.........\OTimer.h
.........\Serial.c
.........\Serial.h
standard_request
................\firmware
................\........\dscr.a51
................\........\dscr.LST
................\........\dscr.OBJ
................\........\fw.c
................\........\fw.LST
................\........\fw.OBJ
................\........\IO.c
................\........\IO.h
................\........\IO.LST
................\........\IO.OBJ
................\........\IO.__i
................\........\periph.c
................\........\periph.LST
................\........\periph.OBJ
................\........\sdRequest
................\........\sdRequest.hex
................\........\sdRequest.lnp
................\........\sdRequest.M51
................\........\sdRequest.Opt
................\........\sdRequest.plg
................\........\sdRequest.Uv2
................\........\sdRequest_Opt.Bak
................\........\sdRequest_Uv2.Bak
................\USB标准请求.pdf
vendor_request
..............\app
..............\...\HDDDB.h
..............\...\Project1.bpr
..............\...\Project1.cfg
..............\...\Project1.cpp
..............\...\Project1.dof
..............\...\Project1.obj
..............\...\Project1.res
..............\...\Project1.str
..............\...\Project1.tds
..............\...\Unit.cpp
..............\...\Unit.dfm
..............\...\Unit.h
..............\...\Unit.obj
..............\...\Unit1.dcu
..............\...\Unit1.ddp
..............\...\vendor.exe
..............\firmware
..............\........\dscr.a51
..............\........\dscr.LST
..............\........\dscr.OBJ
..............\........\EEPROM.c
..............\........\EEPROM.h
..............\........\EEPROM.LST
..............\........\EEPROM.OBJ
..............\........\EEPROM.__i
..............\........\fw.c
..............\........\fw.LST
..............\........\fw.OBJ
..............\........\IO.c
..............\........\IO.h
..............\........\IO.LST
..............\........\IO.OBJ
..............\........\Key.c
..............\........\Key.h
..............\........\Key.LST
..............\........\Key.OBJ
..............\........\Key.__i
..............\........\Led.c
..............\........\Led.h
..............\........\Led.LST
..............\........\Led.OBJ
..............\........\Led.__i
..............\........\periph.c
..............\........\periph.LST
..............\........\periph.OBJ
..............\........\Serial.c
..............\........\Serial.h
..............\........\Serial.LST
..............\........\Serial.OBJ
..............\........\Serial.__i
..............\........\vendorRequest
..............\........\vendorRequest.hex
..............\........\vendorRequest.lnp
..............\........\vendorRequest.M51
..............\........\vendorRequest.Opt
..............\........\vendorRequest.plg
..............\........\vendorRequest.Uv2
..............\........\vendorRequest_Opt.Bak
..............\........\vendorRequest_Uv2.Bak

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