STM32的U盘移植注意点--重要！重要！重要！

错误：…\USB\STM32_USB_OTG_Driver\inc\usb_core.h(99): error: #101: “URB_NOTREADY” has already been declared in the current scope URB_NOTREADY, …\USB\STM32_USB_OTG_Driver\inc\usb_core.h(100): error: #101:

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