FILES -------------------------------------------------------------------------
stm32lib/*
- all the (possibly consolidated) stm32 lib and usb example code
usb.c - 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.c
- 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. hardware.c
- init routines to setup clocks, interrupts, also destructor functions.
does not include USB stuff. EEPROM read/write functions.
dfu.c
- 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