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<set_> That new blog post rules!
<set_> u-boot stepped up and ported some nice things!
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<Pieter0420> Hi, when I boot off an SD card(without intention to flash the eMMC) the internet is unable to be reached. I can connect to wifi however no addresses can be pinged. Can anyone help with this
<Pieter0420> Anyone please? I can't flash the eMMC because the packages I intend to install is too large. Thus I hope to run Debian 10 from the SD card, also helping me to save the Images as progress is made
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<set_> Pieter0420: Hello!
<set_> What board are you using?
<set_> Try Bullseye and look to the forums! There are many images for SD Cards and some info. on how to update/upgrade w/ apt for your specified kernel.
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<Pieter0420> set_ I'm using the Blue, its been configured and connected to my campus wifi but unable to reach anything
<set_> Oh.
<set_> Well...
<Pieter0420> pinging just returns Network unreachable
<Pieter0420> But when booted form eMMC it behaves normally
<set_> Did you set up WiFi for enterprise?
<set_> I think there are two, distinct differences in WiFi for local and enterprise. Let me see what I dredge up.
<Pieter0420> I'm unsure, I only setup an eduroam config file but that normally works
<Pieter0420> How would I set up wifi to be enterprise?
<set_> Are you using connmanctl or wpa_supplicant?
<Pieter0420> connmanctl
<set_> Oh.
<set_> Hmm. I think people have moved on, i.e. me. I think connmanctl still works w/ older images but the updated images uses wpa_supplicant w/ networkd.
<set_> Maybe someone else knows something.
<Pieter0420> Okay, I did use the most recent image provided by beagleboard
<set_> Those are old. Look at that link posted for the Debian 11 Bullseye images.
<set_> Now, if you can get them to work, yes. If not, try an updated image.
<Pieter0420> Okay I see thanks a lot, will check it out
<set_> I is worth a shot. You can still use kernel 4.19.x but w/ Bullseye instead of the older Buster images from .
<Pieter0420> I may even have to switch to Ubuntu 16 since I need to use ROS but it also doesn't reach the internet
<set_> Pieter0420: Are you the person on the forums using ROS2?
<set_> If so, neat. I have been, for a long time, trying to find time to make it work.
<Pieter0420> I haven't posted anything on using ROS2 but I am trying to get it to work on my Blue yeah
<Pieter0420> Which forums?
<set_> Oh! Okay...oh.
<set_> I was asking b/c there was a fellow or gal/whomever asking about it. he/she was trying to make it work.
<set_> I think they got it to boot and then using C/C++, they commanded some source w/ an Ubuntu Image.
<Pieter0420> Ohh, no I haven't posted anything but I have been struggling with it... Considering using old images with ROS1 but the problem still remains about being unable to use the internet
<set_> That person got to it and had some issues w/ permissions.
<zmatt> Pieter0420: one thing to beware of when running from SD card: you can get weird problems if eMMC has a bootloader installed that's substantially different from the one on SD card. a simple fix for that is wiping eMMC (using sudo blkdiscard /dev/mmcblk1) since in that case the bootloader will be loaded from SD card instead of from eMMC
<set_> Zoinks.
<Pieter0420> zmatt: Okay that might be causing it, if I do wipe the eMMC is it possible to set it up again later?
<zmatt> yes you can reflash eMMC later
<Pieter0420> Okay cool I think I'll try that, after wiping do I need to reboot the device?
<zmatt> yes
<Pieter0420> Trying it now, hopefully it does the trick
<zmatt> the issue is that a wildly different bootloader version (especially if the bootloader on eMMC is much older than on SD card) may not be able to correctly interpret config settings in /boot/uEnv.txt which can result in a variety of issues even if it seems to boot okay
<zmatt> I don't know if it's at all related to whatever problem you're trying to solve, it's just something to beware of
<zmatt> it doesn't sound likely honestly but who knows
<zmatt> you're saying it connects to wifi but you can't ping anything? pastebin the output of the commands "ip addr" and "ip route"
<Pieter0420> I think it was the same image from 2020, but it hasn't really changed anything, still can't ping anything
<Pieter0420> debian@beaglebone:/var/lib/cloud9$ ip addr
<Pieter0420> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
<Pieter0420>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
<Pieter0420>     inet scope host lo
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420>     inet6 ::1/128 scope host
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420> 2: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
<Pieter0420>     link/can
<Pieter0420> 3: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
<Pieter0420>     link/ether 50:65:83:dd:7e:20 brd ff:ff:ff:ff:ff:ff
<Pieter0420>     inet brd scope global usb0
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420>     inet6 fe80::5265:83ff:fedd:7e20/64 scope link
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420> 4: usb1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
<Pieter0420>     link/ether 50:65:83:dd:7e:24 brd ff:ff:ff:ff:ff:ff
<Pieter0420>     inet brd scope global usb1
<zmatt> STOP
<zmatt> don't paste multi-line output into chat!
<zmatt> use a paste service like
<Pieter0420> Wait sorry I wasn't aware of that, will do
<Pieter0420> debian@beaglebone:/var/lib/cloud9$ ip addr
<Pieter0420> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
<Pieter0420>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
<Pieter0420>     inet scope host lo
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420>     inet6 ::1/128 scope host
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420> 2: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
<Pieter0420>     link/can
<Pieter0420> 3: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
<Pieter0420>     link/ether 50:65:83:dd:7e:20 brd ff:ff:ff:ff:ff:ff
<Pieter0420>     inet brd scope global usb0
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420>     inet6 fe80::5265:83ff:fedd:7e20/64 scope link
<Pieter0420>        valid_lft forever preferred_lft forever
<Pieter0420> 4: usb1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
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<Pieter0420> How tf does pastebin even work? What do I copy and where do I post?
<zmatt> you paste into the big text field and then hit the "Create New Paste" button at the bottom of the form
<zmatt> then share the url of the resulting page here
<Pieter0420> Yeah did that, and then the text result or the raw result is copied?
<set_> You guys...
<set_> Pieter0420: The resulting link (hyperlink) will be in the address bar, i.e.$TOGOLS;af.
<set_> or whatever the resulting link will be.
<Pieter0420> As such? I have literally never heard of this
<set_> yes sir.
<zmatt> yep
<Pieter0420> Okay sorry about that and thanks
<set_> It is a paste service so bloat is bloatless.
<zmatt> ok well it's definitely not connected to wifi
<Pieter0420> zmatt: which is weird because when using connmanctl to connect it says already connected
<set_> GenTooMan: I got my funny servos up and runnin' again. DynamixelSDK ones...
<zmatt> I don't really know much about connman... what does "connmanctl services" output?
<zmatt> (use pastebin if the output is multi-line)
<set_> @zmatt: I found a couple of pastes from years ago for the ServoCape.
<set_> You did it! I am going to try them soon.
<Pieter0420> zmatt:
<set_> I never got around to it for reasons unbeknown to me.
<zmatt> Pieter0420: euhhh
<zmatt> Pieter0420: maye check logs of connman and wpa_supplicant using: journalctl -u connman -u wpa_supplicant --no-pager
<Pieter0420> zmatt: this is definitely a long one
<zmatt> oh lol, I get it
<zmatt> it can't connect to wifi because it can't validate the TLS certificate as part of WPA Enterprise authentication because the system date/time is wrong, and it can't set the system date/time because to do so it needs NTP i.e. it needs to connect to wifi first
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<Pieter0420> Eesh, should I try internet over USB?
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<zmatt> no, try setting the system date/time manually: sudo date --set='2022-06-09 11:24 UTC'
<zmatt> if the system date is even approximately right it should be able to connect and then will automaticaly set the system date/time properly
<Pieter0420> Okay its set, do I reboot and try again or just disconnect and reconnect?
<zmatt> it should auto-reconnect
<zmatt> you can monitor wpa_supplicant's activity with: journalctl -f -u wpa_supplicant (use ctrl-C to kill it again)
<Pieter0420> Okay I'll try that, it hasn't worked yet
<zmatt> there's probably also some way to tell it to just ignore the certificate validity, although that's not an ideal workaround obviously from a security point of view
<zmatt> there's also probably some way to poke it into retrying the connection immediately instead of waiting for it
<Pieter0420> I disabled and enabled wifi, no luck there
<zmatt> has it made no attempt yet or is it still failing?
<zmatt> (based on logs)
<Pieter0420> Can now successfully ping google, thanks a lot for the help
<set_> !
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<zmatt> it would be nice if there were some global way to tell OpenSSL that the system date is unreliable and "certificate is not yet valid" errors should therefore be suppressed
<zmatt> but normally you wouldn't try to establish TLS connections until *after* you've connected to the internet, at which point it can set the system date/time correctly using NTP
<zmatt> using TLS-based wifi authentication such as PEAP however is an exception to that rule
<set_> what about dpkg-reconfigure tzdata?
<zmatt> that is completely irrelevant here
<set_> Oh.
<set_> Okay.
<zmatt> your timezone is purely a cosmetic thing
<set_> oh.
<set_> I could never get to update w/out this dpkg-reconfigure tzdata command.
<zmatt> that does nothing
<set_> Well...oh.
<set_> It helps w/ dates and times...
<zmatt> no it doesn't
<set_> The BBB w/ the images given out is in UTC.
<zmatt> it just lets you change what timezone you've selected
<set_> If I set up that command to my local timezone, I get to update/upgrade w/out rebooting.
<zmatt> which is something you'll want to set to your local timezone (once)
<zmatt> but it's purely cosmetic and has no effect on update/upgrade
<zmatt> if you think it did, most likely it's just because you had to wait a moment for the system date/time to get set correctly, and fiddling with that command made you wait a moment
<set_> Oh.
<set_> Okay.
<zmatt> doing nothing for the same amount of time would have the same result
<set_> I can never, never, use my board w/out the update of my local timezone (supposedly).
<set_> It is set to Americas. I need to set it to US.
* set_ kept on thinking that was it.
<set_> Thank you for explaining I was aloof.
<set_> Mental aloofness is keen!
<set_> which way did he go George? ^ < ^ > ?
<set_> @zmatt: Way to dig. I am always learning from you and your ability to problem solve!
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<Pete90> Hi does anyone have experience in Ubuntu 20.04 on a BB Blue, its not much but I cannot get it to connect to my, or my campus, wifi and most guides use tools that aren't available in the base images of Connman isn't available and I don't understand how the wpa_cli works
<set_> Do you have internets?
<set_> Sorry.
<set_> Do you have Internet?
<set_> Look to this site:
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<Pete90> Yes I have internet but going back until beginning last year didn't give any results
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<set_> Hold on.
<set_> Let me get you updated.
<Pete90> Champ, thanks a lot
<set_> That may help depending on what kernel and image you are using.
<set_> You are welcome...
<set_> I figured it is the least I can do.
<Pete90> Using this one:  bone-ubuntu-20.04.4-console-armhf-2022-05-22-4gb.img
<Pete90> Any idea to configure it for campus wifi when an ID is also necessary or is that maybe in the documentation?
<set_> Oh! Let me think. Please hold.
<set_> Hmm. So, you cannot get online yet?
<Pete90> Hold on I'm at home, just thinking in advance
<Pete90> I set it up but I'm unsure if it actually connected
<set_> Oh.
<set_> ip a?
<set_> Does it show a valid IP Address?
<Pete90> state down on wlan0
<set_> Ut oh.
<set_> I remember something from earlier today. @zmatt was telling a fellow to update time or something. Let me check the logs.
<Pete90> Saw something earlier, how do you set the time and date on terminal?
<set_> Right.
<Pete90> Okay I changed it successfully, do I wait for it to change or do I reset connection or maybe reboot?
<set_> Pete90: That first link I showed you has the instructions on how exactly to perform the Wifi connection.
<Pete90> Only needed another enabling, thanks for the help man I really appreciate it
<set_> So, change /etc/wpa_supplicant/wpa_supplicant-wlan0.conf w/ your credentials.
<set_> Oh.
<set_> No issue.
<set_> Did it work?
<Pete90> Yeah connected to my home wifi, can ping google so
<set_> Okay. Nice. that forum has some good ideas on it. Specifically regarding updated systems from the people.
<Pete90> Will definitely check it out, thanks
<set_> I always forget the command to update the WiFi system.
<set_> I keep going back and back again. Writing it down this time will prevent me from looking it up again.
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<Pete90> Any suggestions regarding campus wifi where I need to sign in using credentials?
<set_> I think w/ the BBBW or BBBlue along w/ WiFi, you have to update the time and date.
<set_> brb
<set_> Pete90: I am not sure about campus wiring for WiFi. Maybe once you make it to campus, someone at some point can pitch in.
<set_> It is a signal, right. So, there is a way. may need to update timing and dates from what @zmatt what saying earlier.
<Pete90> set_: thanks man, that'll only be about a week from now, the date should be fine but it requires my email and password to log in
<set_> Hmm.
<Pete90> I tried this method but it did not work and removed the file
<set_> Odd. So, you need access to a server and have permission to do so.
<set_> I wonder...can they override your access to get your board connected.
<set_> ?
<set_> They usually have things set up so one does not actually damage their server.
<Pete90> Very much doubt, even if I email they'll take quite a while to respond
<set_> I never really thought about it until now.
<set_> It is not easy to say what a school will allow and what they will not allow.
<set_> For instance, the library here does not allow me to just show up and attach a BBB to their computers.
<Pete90> Yup even worse cause its university and they tend to just ignore anything they won't consider
<set_> It is a security issue from their standpoint unless it is allowed.
<set_> I am sure they have a password for one server and another for another server. One may allow for direct access while others may only allow for connections for usb debugging.
<set_> Pete90: Have you talked to the IT Dept. yet?
<Pete90> Nope I haven't, using the original Debian 10 image allowed you to configure a file in the connman folder with the specified in and it would connect automatically so I though I might find one here
<set_> I tried to chat w/ the IT Dept. once at this college I attended. They invited me back to the lair, I stood still for five minutes, and then left. No one showed up. I should have stayed patient.
<set_> Oh.
<set_> Okay.
<set_> Maybe.
<Pete90> As far as I've found these guys don't like helping people
<set_> Most people hate to help others.
<set_> "Do it yourself."
<set_> Ha.
<set_> I understand, sort of. "If I help you, how am I going to help myself?"
<set_> The BBB land is the same.
<set_> I like to learn and sometimes me getting in the way by helping only hurts me and others too.
<set_> Anyway, if you configure things at the school, good on ya'.
<set_> If not, maybe a computer w/ a Hotspot?
<Pete90> That is the other option yeah, laptops can relay the connection
<set_> So, even outside of the library, one cannot connect to a BBB on the campus?
<set_> What if you did not have Internet access on the BBB/BBBlue?
<set_> Could you still debug
<set_> ?
<Pete90> This wifi is campus wide, so you can't import packages then
<set_> For instance, you can load your...blah.
<set_> There is no way they have one access to WiFi on the entire campus. It is tons of servers in different locations.
<set_> For instance, Hall A has their setup. Library has their setup and so on.
<Pete90> Yeah but a lot of access points all under the same name and such so wherever you move the Eduroam wifi is always about 3 or 4 bars
<set_> It is almost like they are watching you...I am scared.
<set_> Oh. Odd.
<set_> I never used wifi at the college before today and I would not know about it. It is interesting though.
<set_> it is like they put up a web page right for you to access your WiFi?
<Pete90> Actually no, you just click on the wifi to connect, provide email and password, and then its connected campus wide, each lecture hall has 1 or 2 routers etc
<set_> I am scared.
<set_> Do you take notes on your computer or by pen/paper
<set_> ?
<set_> All jokes aside, it is normal.
<Pete90> Mostly pen and paper but they provide notes a lot now so that does help
<set_> They "Provide" notes?
<set_> Who does?
<set_> Oh. Like worksheets and print-outs.
<Pete90> The lecturer gives notes on the topic he covers the day
<set_> Damn!
<set_> That is too much.
<Pete90> For online you might as well I guess, you have to give the recording so
<set_> I remember one class. The lady handed out the lesson on paper. It was about memory and not the actual subject.
<set_> Oh.
<set_> Online school.
<set_> I want to try it one day.
<set_> Futuristic.
<Pete90> No physical school, online classes, our country isn't fully out of lock down so classes have a size limit and I never felt the need to book
<set_> Oh.
<set_> That makes sense.
<set_> Oh. COVID?
<Pete90> Yup, still
<set_> Did you see that test case based around the BBB? It is biomedical but interesting nonetheless.
<zmatt> Pete90: if you're trying to connect to wifi using WPA Enterprise (e.g. eduroam), make sure the system date is set at least *roughly* correctly otherwise it won't be able to verify certificates
<Pete90> set_: Biomedical is cool and I would consider it but I hate the lecturers in charge of it
<zmatt> (normally the system date and time would be set using NTP once the beaglebone has internet access, but when connecting to wifi requires TLS you get a chicken and egg problem)
<Pete90> zmatt: Okay I'll check that it is up to date but how would you enter the identity? Like my email address
<zmatt> apparently by putting a config file in the right place: (I don't really use connman myself but someone had success with that today)
<zmatt> this is assuming you're using a debian buster image
<Pete90> Eesh but Ubuntu doesn't have connman
<zmatt> I think he was using ubuntu actually
<zmatt> I have no idea what's on any ubuntu images that float around for the beaglebone
<Pete90> Okay I'll check if I find anything but connman and nmcli isn't on
<zmatt> it'll depend on what network manager is used on whatever image you're using
<zmatt> e.g. the debian buster images use connman, the debian bullseye images use systemd-networkd and wpa_supplicant
<Pete90> This one also uses wpa_supplicant
<zmatt> I mean, wpa_supplicant is of course always used for wifi, but it can be either controlled by another network manager or it can be used directly
<zmatt> with its own config file
<Pete90> Ohh thats what you mean
<zmatt> when systemd-networkd is the network manager (as is the case on debian bullseye images), wifi requires configuring wpa_supplicant directly
<zmatt> like I said, I have no idea what any of the ubuntu images use
<zmatt> also, the right settings may depend on your institution
<zmatt> "Important: all configuration instructions are specific for the issuing institution. It is not helpful to follow configuration instructions of other institutions; the settings are different from institution to institution and you will very likely mis-configure your device if trying third-party configurations" .. according to eduroam
<Pete90> Yeah  found a config earlier for a German university and though it probably wouldn't work
<Pete90> Guess I'll find out once I'm back on campus
<zmatt> eduroam has a config assist tool but I'm not sure if it can just provide the settings (an "installer" is obviously not helpful here)
<zmatt> what institution are you studying at?
<Pete90> University of Pretoria, in South Africa
<zmatt> not listed in eduroam's config assist tool :/
<Pete90> Ffs, there really is no help at this place -_-
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<zmatt> like, WPA-EAP has a ton of options and I have no idea though what magic those get selected if you're not asked to configure them explicitly
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<Pete90> Ofcourse none of the links work
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<Pete90> I could have a chat with the networking department lecturer
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<calrama> Hey, how would I go about enabling timer10 and setting clock source and rate on the beaglebone ai? I assume with a dts, but there's no example I can find.
<zmatt> Pete90: this seems like a plausible network config block for wpa_supplicant, but ideally these settings wouldn't have to be guessed:
<zmatt> calrama: what exactly are you trying to do with a hardware timer?
<calrama> zmatt: Route it to an external pin to drive an MCP346's AMCLK in order to reach 50+ksps
<calrama> With its internal clock, it can only reach about 36 ksps at best, but I need more.
<calrama> I could program a pru to do it, but that seemed like a waste.
<zmatt> there's a pwm driver that supports these hardware timers
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<calrama> Ok? How does one use that, theN?
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<zmatt> MCP346 seems to be a microwave oven, do you mean MCP3461/MCP3462/MCP3464 ?
<calrama> (kernel 4.14; cannot upgrade the kernel due to TIDL not working on newer kernels)
<calrama> Yeah, sorry. The MCP3462, for now.
<zmatt> are you using a kernel driver for it or just direct spi from userspace?
<calrama> I'm coding on the PRU.
<calrama> It's a hard realtime application.
<zmatt> ok
<calrama> But the setup can be in userspace
<calrama> The setup of the generating a stable clock for AMCLK.
<zmatt> ok.. hold on, need to dig up how to configure a gptimer for pwm in dts
<calrama> I'm happy to provide any information you want, but since I'm already using a custom dts (I "backported" the universal cape code back to kernel 4.14) that would be easiest for me, I think.
<calrama> Thank you :)
<calrama> But I just don't know how to "port" that to a normal device tree, especially since it's not for the bbai.
<zmatt> is the timer10 device node just &timer10 ?
<calrama> I mean, I'm not an expert. There exists multiple nodes that have timer10 in their name.
<zmatt> I only see one
<calrama> I mean, there's one node names timer10, yes.
<calrama> But there is also timer10_gfclk_mux
<zmatt> uhh, it looks like timer10 is already in use?
<zmatt> as watchdog for dsp1
<calrama> Ah, ic. Let me look for a different one.
<calrama> timer14 isn't referenced by anything, afaict
<zmatt> 14-16 appear available indeed
<calrama> timer16 should be the best, for now. I just saw that I'm already using p8.09 (timer14) for pru output.
<zmatt> so a minimal declaration would be ... plus a pinmux node attached to either this node or to &timer16
<zmatt> and then you should be able to export the pwm to sysfs manually or have an udev rule do that automatically
<zmatt> (or use your cape-universal port to configure pinmux)
<calrama> So I would add the block contents to the block at line 17? Do I understand that correctly ( src: )
<calrama> (By that I mean insert the pwm-timer16 node into the same level as reserved-memory, leds, etc.)
<zmatt> for example
<calrama> Ok, thank you very much :)
<zmatt> there's a lot of flexibility in how you structure a dts file... each top-level block just says "add/merge the following nodes/properties into this target node", hence
<zmatt> I generally prefer to keep things grouped by logical function rather than by where things are located in the final tree
<calrama> Ah, fair enough. I'll try this and come back tomorrow in case things don't work out. Thanks very much :)
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