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

ref: 4c34bf99a65daa0fbc7ed26e30c0587290a8b062 stm32h747i-disco-usb-image-viewer/include/clocks.h -rw-r--r-- 1012 bytes 
feat: implement usb devicd cdc descriptors, init, setup