At 2016-10-29 00:28:30, g4@novadsp.com wrote: >Hello > >> And could you tell me how to run udev or mdev? > >This is quite useful: http://free-electrons.com/doc/mdev-lab.pdf Thank you! After adding "mdev -s" in file /etc/init.d/rcS, I can find device nodes in /dev/ directory