iframe-proxy | Sunbelt Computer Software

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FILES -------------------------------------------------------------------------
  - all the (possibly consolidated) stm32 lib and usb example code
  - USB-specific hardware setup. Interrupts, clocks, etc. handling USB when
    not "Attached". some low-level callbacks (low power mode, init, reset,
    resume, etc).
usb_callbacks.c
  - aka endpoints: handling data transfer when "Configured". calls out to
    application specific callbacks (i.e. DFU).
usb_descriptor.c
  - aka application descriptor; big static struct and callbacks for sending
    the descriptor.
  - main loop and calling any hardware init stuff. timing hacks for EEPROM
    writes not to block usb interrupts. logic to handle 2 second timeout then
    jump to user code.
  - init routines to setup clocks, interrupts, also destructor functions.
    does not include USB stuff. EEPROM read/write functions.
  - mostly the giant FSM case switch, also some USB endpoint callbacks
TODO --------------------------------------------------------------------------
 * pack the structs
 * use sizeof() for usb application descriptor once structs are packed

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