错误报告信息:
Error[Li005]: no definition for "USBD_ReqGetStatus" [referenced from D:\kl25z\
kl25_sc_rev10\klxx-sc-baremetal\build\iar\platinum\FLASH_128KB\Obj\usbd_core.o]
Error[Li005]: no definition for "USBD_ReqSetClrFeature" [referenced from D:\kl25z\
kl25_sc_rev10\klxx-sc-baremetal\build\iar\platinum\FLASH_128KB\Obj\usbd_core.o]
Error[Li005]: no definition for "USBD_ReqSetAddress" [referenced from D:\kl25z\
kl25_sc_rev10\klxx-sc-baremetal\build\iar\platinum\FLASH_128KB\Obj\usbd_core.o]
Error[Li005]: no definition for "USBD_ReqGetConfiguration" [referenced from D:\kl25z\
kl25_sc_rev10\klxx-sc-baremetal\build\iar\platinum\FLASH_128KB\Obj\usbd_core.o]
Error while running Linker