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

ref: 8fd37eafa2cd7ba0dc587922c113260ce53aabca 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