[beagleboard] Using /dev/ttyS0 under read-only rootfs
I have successfully created a read-only FS with the latest debian (2015-03-01) image and figured out how to get a USB drive mounted as well as the network running, however I can't figure out how to use the UARTS, specifically /dev/ttyS0. I assume that the fact that the system is read only is the problem but I am not sure how I can "mount" the tty as read-write. Does anyone have any suggestions? For reference my fstab looks like this: # /etc/fstab: static file system information. # UUID=4912b57f-749f-4804-8e26-2dcf1617a5eb / ext4 ro,noatime,errors=remount-ro 0 1 debugfs /sys/kernel/debug debugfs defaults 0 0 tmpfs /tmp tmpfs nodev,nosuid,size=32M 0 0 tmpfs /srv tmpfs nodev,size=512K 0 0 tmpfs /var/log tmpfs defaults,noatime,size=1M 0 0 tmpfs /var/tmp tmpfs defaults,noatime,size=512K 0 0 tmpfs /var/run tmpfs defaults,noatime,size=512K 0 0 /dev/sda1 /USBDRIVE vfat defaults,user,dmask=000,fmask=111 0 0 #this is for the USB thumb drive Thanks, Mark -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Using /dev/ttyS0 under read-only rootfs
On 09/20/2015 08:09 PM, Mark Fisher wrote: > I assume that the fact that the system is read only is the problem but I > am not sure how I can "mount" the tty as read-write. Does anyone have > any suggestions? You might want to mount your /dev as a tmpfs? A quick google gave me this: https://sites.google.com/site/linuxpendrive/rorootfs cheers, Nuno -- -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] Using /dev/ttyS0 under read-only rootfs
I tried that, thanks, but it didn't work. Maybe I didn't have the syntax correct. Can anyone suggest the correct syntax? After reading many articles I have made the USB drive and networking function but I really can't find any information specific to this problem. Thanks > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
