Hello,
I’m following a tutorial to learn to use beaglebone, and to change gpio configuration for each boot…
I compile an DTBO file and i try to copy it in the following location:
/sys/firmware with the command:
sudo cp myFile.dtbo /sys/firmware
But, the system return me :
cp: cannot create regular file /sys/firmware/myFile.dtbo: No such file or directory
Of course my file exist …
So i dont know what i shoud do to realise that…
Please help me! And sorry for my poor English…
On Sat, 15 Oct 2016 01:53:34 -0700 (PDT), Sebastien Capel
<sebastiencapel.sc@gmail.com> declaimed the
following:
Hello,
I'm following a tutorial to learn to use beaglebone, and to change gpio
How old is that tutorial... What OS build was it based upon, and what
OS build are you running?
configuration for each boot...
I compile an DTBO file and i try to copy it in the following location:
/sys/firmware with the command:
*sudo cp myFile.dtbo /sys/firmware*
But, the system return me :
cp: cannot create regular file `/sys/firmware/myFile.dtbo`: No such file or
directory
Of course my file exist ...
Note that the error message is not about the file your trying to copy,
but about where you are trying to put it...
http://kilobaser.com/blog/2014-07-15-beaglebone-black-gpios
implies that overlays are stored in /lib/firmware -- not /sys/firmware. And
to activate an overlay you have to "echo" the name to the capemanager
slots.
Most of the /sys "files" are not really files, as I understand it, but
rather entries created by the kernel which really actuate code when
read/written.
{warning -- even that link is a bit out of date; current builds no longer
have a FAT partition, and Jessie uses systemd instead of the older init
system}
device tree overlays go into /lib/firmware