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

ref: 89d71e0ed0d2c3678ad07d06d08f27d089d71e2a stm32h747i-disco-usb-image-viewer/src/clocks.c -rw-r--r-- 1.7 KiB 
feat: implement usb devicd cdc descriptors, init, setup