====== STM32_USB ======

  
  
  



===== - 参考资料 =====

  * [[https://blog.csdn.net/ZCShouCSDN/article/details/78936456|STM32 之三 标准外设版USB驱动库详解]]
  * [[https://blog.csdn.net/dragon_cheng/article/details/83146547|STM32 USB HID 组合设备]]


===== - 数据路径 =====
  - USB中断

    ENTRY OTG_FS_IRQHandler (.s)
      USBD_OTG_ISR_Handler() (usbd_usr.c)
        USBD_OTG_ISR_Handler(USB_OTG_CORE_HANDLE*) (usb_dcd_int.c)
          USB_OTG_IsDeviceMode  ()             // 1
          USB_OTG_ReadCoreItr   ()             // 2
          DCD_HandleOutEP_ISR   ()             // 3
          DCD_HandleInEP_ISR    ()             // 4
          DCD_HandleResume_ISR  ()             // 5
          DCD_HandleUSBSuspend_ISR  ()         // 6
          DCD_HandleSof_ISR         ()         // 7
          DCD_HandleRxStatusQueueLevel_ISR  () // 8
          DCD_HandleUsbReset_ISR    ()         // 9
          DCD_HandleEnumDone_ISR    ()         // 10
          DCD_IsoINIncomplete_ISR   ()         // 11
          DCD_IsoOUTIncomplete_ISR  ()         // 12
          DCD_SessionRequest_ISR    ()         // 13
          DCD_OTG_ISR  ()                      // 14

  // 4
  DCD_HandleInEP_ISR(USB_OTG_CORE_HANDLE*) (usb_dcd_int.c)
  
  // 3
  DCD_HandleOutEP_ISR(USB_OTG_CORE_HANDLE*) (usb_dcd_int.c)