Progress in USB driver
Nothing is working yet. But just getting this in here so it is saved.
Minor changes with USB power enabled
Serial over USB is working now.
Removed stm32_usbdev.c, added stm32_usbfs.c. Still needs review before pull-request.
Rewrote VDDUSB valid check to use register definitions. Wait for USB33RDY before moving on. Also style updates.
Renamed stm32_usbdev files to stm32_usbfs. Renamed STM32H5 configuration options from STM32H5_USB to STM32H5_USBFS. Properly named REGDEBUG defines. Added STM32H5_USB_REGDEBUG to Kconfig and updated stm32_usbfs.c to use it. TRACE functionality still needs work.
Updated REGDEBUG for 32-bit register accesses.
More style updates.
Added usbnsh defconfig to nucleo-h563zi
Update to allow 16 buffers (max for 8 endpoints). Renamed lpinterrupt and lptransfer. Changed board.h to use SYNCSRC_USB only if USB is enabled.
Buffer size is still set to max packet size of 64 bytes, because we are using a full-speed peripheral. It is unclear to me whether having a buffer larger than the max packet size has any benefit. Double buffering is a way to increase throughput, though that still needs to be implemented.
Adapted USBFS Buffer table for 32-bit accesses.
Style updates
Build stm32_hsi48.c based on CONFIG_STM32H5_HAVE_HSI48.
Change LPMODE CNTR bit to SUSPRDY.
689aa55e01