On Saturday, May 19, 2018 at 5:55:50 PM UTC-7, Dennis Lee Bieber wrote: > > On Sat, 19 May 2018 08:12:37 -0700 (PDT), > rj...@umich.edu declaimed the following: > > >Hello, > > > >I'm trying to follow the Adafruit_BBIO UART tutorial > >( > https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/installation-on-ubuntu) > > > > > > That's a pretty old page, going back to Debian Wheezy, cape > manager, > and kernel device tree overlays. >
Hey Drew, what's the current way to setup a UART with the latest Adafruit_BBIO? > >debian@beaglebone:/boot$ cat uEnv.txt > > > ># this uEnv.txt created by configure_robotics_dt > > > >uname_r=4.9.78-ti-r94 > >dtb=am335x-boneblack-roboticscape.dtb > >cmdline=coherent_pool=1M > > While this is using the robotics cape specific device tree... Did > that > device tree export the UART. Can you use the command line config-pin on > the > UART pins to set the mode? > The roboticscape dt doesn't expose all of the pinmux helpers, so I'm guessing that it won't work. Still, you shouldn't need to as most of the UARTs are already setup with that device tree. Some good news is that if you accidentally said yes to installing the roboticscape device tree, the installer saves a backup of the original uEnv.txt file so you can back out the change. https://github.com/StrawsonDesign/Robotics_Cape_Installer/blob/3d35ecbd12b7cae475cc07085cea78dea3cc53a9/device_tree/configure_robotics_dt.sh#L121 Just look for /boot/uEnv.txt.backup and copy it to /boot/uEnv.txt (after making sure the contents are sane). > > If you aren't actually using robotics cape features, you probably > should not have accepted it during the initialization phase of the new OS > image. {I was very disappointed last week to get home and find my BBB > stopped on a prompt about installing the robotics cape stuff -- I'd left > home after starting "apt-get upgrade" on the new SD card image; prior > experience said that would run with no human interaction} > > > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/ > > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/acdcd9ac-6857-4d62-aa11-89259952c27c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
