~ruther/stm32h747i-disco-usb-image-viewer

ref: 89d71e0ed0d2c3678ad07d06d08f27d089d71e2a stm32h747i-disco-usb-image-viewer/src/registers.c -rw-r--r-- 983 bytes
fix: clear bit operation
chore: some renames
feat: add registers, pin, exti, usb_device skeleton