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

ref: 3644d05456728e9e59ae8fa9deeead6768544eff stm32h747i-disco-usb-image-viewer/src/usb_device.c -rw-r--r-- 3.0 KiB 
feat: add registers, pin, exti, usb_device skeleton