Re: [beagleboard] Re: BBB Jessie image with UART4 support

[Enoch]

Thanks Winston & Graham: I will soon follow your steps but candidly, that's improper to require an application developer to go this deep to tweak the available platform resources. With so many people invested in the BBB platform it should not be too much to expect having a GUI to configure the use of P8/P9/etc... :-) Regards, Enoch. On 03/12/2015 02:20 PM, Graham Haddock wrote: If all that you want different from the default configuration is ttyO4 working, then Winston's advice is good. If there are other/additional changes, then you will need to make additional edits or changes to the ".dts" or ".dti" files. --- Graham == On Thu, Mar 12, 2015 at 12:21 PM, <smith.winston....@gmail.com> wrote: On Thursday, March 12, 2015 at 12:36:33 PM UTC-4, Enoch wrote: Is there some /etc/init.d script or equivalent to manipulate the pin mux? If not, links to where to start dealing with the source would be appreciated. You need a DTB with the UARTs enabled.  See: https://github.com/RobertCNelson/dtb-rebuilder/tree/3.14-ti In particular, for ttyO4 you'll want to look at: https://github.com/RobertCNelson/dtb-rebuilder/blob/3.14-ti/src/arm/am335x-boneblack-ttyO4.dts The steps are: git clone https://github.com/RobertCNelson/dtb-rebuilder.git cd dtb-rebuilder git checkout 3.14-ti make src/arm/am335x-boneblack-ttyO4.dtb cp src/arm/am335x-boneblack-ttyO4.dtb /boot/dtbs/`uname -r`/ Then you'll need to edit /boot/uEnv.txt and add: dtb=am335x-boneblack-ttyO4.dtb Then reboot; check dmesg to make sure that the pinmux-helper has properly set up the pins for uart mode. -W -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to a topic in the Google Groups "BeagleBoard" group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/beagleboard/E0D26y1wypU/unsubscribe. To unsubscribe from this group and all its topics, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- 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. -- 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.