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  • [00:10:14] <rneese> evening
  • [00:10:30] <rneese> ok I have the bbb booted up and I plug a usb wifi into it
  • [00:10:48] * vvu|Log_away is now known as vvu|Log
  • [00:10:50] <rneese> I have wireless tools and the firmware installed
  • [00:11:00] <rneese> but I cant get it to see the device
  • [00:11:06] * lagrz (~lagrz@ip67-153-177-226.z177-153-67.customer.algx.net) Quit (Quit: lagrz)
  • [00:11:12] <rneese> but the device works fine on other boards
  • [00:11:55] * dysinger (~tim@cpe-24-94-76-59.hawaii.res.rr.com) Quit (Quit: dysinger)
  • [00:12:06] <rneese> root@arm:~# lsusb Bus 001 Device 002: ID 178d:02be Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  • [00:12:24] <rneese> so it sees a device plugged in
  • [00:13:38] <rneese> Bus 001 Device 002: ID 178d:02be
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  • [00:18:12] <nomel> any errors in journalctl?
  • [00:20:34] <rneese> well I found 1 usse
  • [00:20:48] <rneese> wlan0 not in the /etc/network/interfaces
  • [00:20:51] <rneese> its up now
  • [00:21:06] <rneese> now I have to get around the wpa issues
  • [00:21:42] <rneese> not sure the device supports wpa2
  • [00:21:55] <rneese> and aes
  • [00:22:05] <rneese> it should support tik
  • [00:25:26] * Ceriand (~ceriand@unaffiliated/ceriand) Quit (Ping timeout: 264 seconds)
  • [00:26:06] <rneese> DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 19 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 16 No DHCPOFFERS received. No working leases in persistent database - sleeping.
  • [00:26:14] <rneese> it does not find the router
  • [00:26:31] <rneese> and I have the wpa_sup conf file setup
  • [00:32:37] <rneese> wpa_supplicant: /sbin/wpa_supplicant daemon failed to start run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
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  • [00:35:43] <rneese> wpa_supplicant: wpa-driver nl80211,wext (default) wpa_supplicant: /sbin/wpa_supplicant -s -B -P /var/run/wpa_supplicant.wlan0.pid -i wlan0 -D nl80211,wext -c /etc/wpa_supplicant/wpa_supplicant.conf -C /var/run/wpa_supplicant Starting /sbin/wpa_supplicant... wpa_supplicant: /sbin/wpa_supplicant daemon failed to start run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
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  • [00:46:01] <rneese> got a ip but I cant ssh or any thing to it
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  • [00:52:13] <rneese> what is this interface about ?
  • [00:52:17] <rneese> # Ethernet/RNDIS gadget (g_ether) # ... or on host side, usbnet and random hwaddr iface usb0 inet static address 192.168.7.2 netmask 255.255.255.0 network 192.168.7.0 gateway 192.168.7.1
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  • [00:52:54] <rneese> does this explain why my wifi is not working
  • [00:53:18] <rneese> I get a ip but icant ssh or anything to it
  • [00:59:32] <rneese> ok its a bone issue it works fine on my odroid x2 fine
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  • [04:07:15] <HELLO_> I'm new in beaglebone black. I know in original version beaglebone, I can get serial debug information just plugging mini usb to pc. But Beaglebone black can't. I search from http://circuitco.com/support/index.php?title=BeagleBone_Black_Accessories and try to use Adafruit 4 Pin Cable (PL2303) by plugging green line to P9-4, white line to P9-5, black line to GND. I use putty trying to get serial information but I can get only much of d
  • [04:09:09] <HELLO_> just like setting wrong baud-rate. But I don't know why I set 115200 in putty and it work in original version beaglebone. How can I get right serial debug information in Beaglebone Black. Thanks
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  • [05:13:33] <nomel> HELLO_: turn off hardware and software flow control
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  • [06:33:52] <Russ> hmm, "e28fc600 add ip, pc, #0, 12" that isn't an operand2 I'm familiar with
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  • [07:09:06] <BeagleGithub> [kernel] koenkooi pushed 1 new commit to 3.12: http://git.io/XCXnHw
  • [07:09:06] <BeagleGithub> kernel/3.12 f190cce Koen Kooi: 3.12: update to latest mainline, replace edma/mmc patchset...
  • [07:10:50] * IslandTony is now known as PlainsTony
  • [07:11:50] <KotH> JIHAD!
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  • [07:33:39] <mrpackethead> what did i miss
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  • [07:35:42] <KotH> mrpackethead: JIHAD!
  • [07:36:51] <emeb_mac> there's enough of that for everyone
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  • [07:44:14] * PlainsTony is now known as SkyRobert
  • [07:44:43] <mrpackethead> kia ora emeb_mac
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  • [07:48:43] <thangng> could any one tell me if the image shipped with BeagleBone (11-22-12) support camera cape?
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  • [07:49:17] <thangng> I could not use gstreamer to take picture on this image (11-22-12)
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  • [08:14:38] <mouha> hi everybody
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  • [08:14:58] <vmayoral> greetings
  • [08:15:14] <mouha> I'm new to beaglebone black and I'm so happy (wasn't with the PI btw)
  • [08:15:46] <Anguel> mouha: what are you so happy with? :)
  • [08:16:02] <mouha> Beaglebone black of course ;)
  • [08:16:26] <mouha> I'm just wondering what is the best way to build an image to use Qt framework
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  • [08:16:52] <mouha> as I have the 4D systems display and want to create an application to use it with Qt
  • [08:17:17] <Anguel> mouha: hah, that's probably what where you come back to reality. have you tested the display touchscreen? it does not work properly for me
  • [08:18:11] <mouha> oh after Calibrated it : it's ok. Used the Gnome with 4"3 is somewhat not so easy, but it's ok
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  • [08:18:29] <Anguel> if you don't need 3d you can use angstrom
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  • [08:21:52] <mouha> I have some troubles building it: link to some packages are missing while building it :
  • [08:21:56] <mouha> MACHINE=beagleboard ./oebb.sh bitbake virtual/kernel
  • [08:22:27] <mouha> besides I don't know what is the recipe to build Qt (Yocto had sato )
  • [08:24:25] <koen> qt4-x11 or qt4-embedded
  • [08:24:34] <koen> both are present in the feeds as well
  • [08:24:55] <mouha> great, thanks Koen
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  • [08:27:47] <thangng> could any one tell me if the image shipped with BeagleBone (11-22-12) support camera cape?
  • [08:29:02] <koen> thangng: update anyway
  • [08:29:35] <thangng> sorry, could you tell me more?
  • [08:29:56] <koen> update the image
  • [08:30:09] <koen> the latest ones from http://downloads.angstrom-distribution.org/demo/beaglebone/ support the camera cape
  • [08:30:29] <koen> note that on beaglebone white something is wonky with DDR timings, so the camera cape tends to crash the board
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  • [08:30:52] <mouha> About my former question : someone used the last git repo recently ? the build fails to download an archive package
  • [08:31:05] <mouha> I've checked the link and indeed it's dead
  • [08:31:16] <koen> mouha: which one?
  • [08:31:51] <Anguel> mouha: here are my findings regarding the LCDs if you are interested: https://groups.google.com/forum/#!msg/beagleboard/SXTaSUf4aSk/nIyYbs0msNsJ
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  • [08:34:41] <ds2> @#$#@$@#&$(*#@&%@#(*(*#@$&*#@&$(*#@ yocto
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  • [08:35:30] <ds2> can they make bitbake any more slower
  • [08:36:12] <vvu|Log> ds2: any idea if the kernel sources for the old nexus 7 4.3 are out ?
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  • [08:37:49] <ds2> vvu|Log: sorry, donno.
  • [08:38:12] <ds2> no demand for development there yet
  • [08:39:31] <mouha> Anguel : well, hmm I've hoped you don't ask for detail..... it was yesterday at home and I'm currently at work so I don't remember (damn)
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  • [08:41:55] <mouha> it was a package for archive management
  • [08:42:43] <mouha> maybe if someone git pull + Angstrom build yesterday may have the same issue
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  • [08:44:48] <koen> mouha: did you do oebb.sh update to drag in updates?
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  • [08:45:08] <koen> everything that is downloaded from the internet is also on the source mirror, so I'm curious which tarball failed
  • [08:46:00] <Anguel> mouha: if you test your lcd later you may leave a message in google groups. koen told me to try to enable 16x averaging of the BBB adc but I am new to embedded linux and have no real idea how to do that :( still wondering if it is normal that the LCD returns different pressure values in different parts of the touchscreen (checked with evtest)
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  • [08:53:13] <mouha> Koen : I've followed this http://www.angstrom-distribution.org/building-angstrom
  • [08:53:42] <mouha> Anguel : I didn't used the same image version as you (was looking at your post and the related video)
  • [08:54:27] <Anguel> mouha: i tested with latest angstrom yesterday, or what do you mean?
  • [08:55:23] <mouha> Anguel : I just put the 4D cape with the image in the former BBB
  • [08:55:45] <mouha> I propose to check this version asap, but I'm sure this is an older one
  • [08:56:25] <mouha> BTW, if you use the ADafruit python lib you could acces to ADC
  • [08:56:37] * Ceriand (~ceriand@unaffiliated/ceriand) Quit (Ping timeout: 248 seconds)
  • [08:57:12] <vvu|Log> any idea if i can export from Eagle to Mach3 for CNC?
  • [08:57:23] <Anguel> mouha: you mean the original image that came with the BBB? please run ts_calibrate and then ts_test, go to draw mode and try to apply light pressure with the pen. see if the cursor jumps many pixels to the side
  • [08:58:09] <Anguel> mouha: the problem is that the driver is in the kernel afaik
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  • [09:03:57] <Anguel> mouha: they could have simply put a cheap touchscreen controller for the touch which would probably give better results
  • [09:04:26] <mouha> Anguel: from what you said and the video : indeed the driver seems to be involved . I 've seen quite some same things with the FA mini2440
  • [09:05:18] <mouha> Koen : did I missed anything after the update ?
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  • [09:06:12] <Anguel> mouha: yes, i also read some forum posts about the FA
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  • [09:09:29] <mouha> Anguel : sadly confirmed I've used the FA with a shiny 7" Display....which now stands in my desktop
  • [09:10:07] <Anguel> mouha: what was the reason? the display??
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  • [09:29:13] <mouha> Anguel : the Display was fine, the main reason is ... the FA itself and the dev workflow related
  • [09:29:18] * mythos (~mythos@unaffiliated/mythos) Quit (Ping timeout: 245 seconds)
  • [09:29:55] <mouha> Maybe I could reuse this 7" Display with the BBB as it's also a parallel one
  • [09:31:07] * vvu|Log_away (~vvu|Log@188.26.116.4) Quit (Ping timeout: 260 seconds)
  • [09:31:32] <Anguel> mouha: unfortuntely angstrom does not have any docs nor there are any books to start with. even if you have experience with other linux there are some specific things to know here. TI has some docs regarding its SDK but it is based on Arago, not Angstrom
  • [09:32:24] <KotH> there is enough information around to learn angstr?m
  • [09:32:33] <Anguel> afaik the raspberry is much better supported but i also like the BBB hw more
  • [09:32:34] <KotH> just use google, read the docs
  • [09:32:52] <KotH> and if you have specific questions, you can ask them here
  • [09:32:52] <Anguel> KotH: which docs?
  • [09:32:57] <KotH> the angstr?m docs
  • [09:33:01] <KotH> they exist, you know
  • [09:33:13] <av500> the OE docs too
  • [09:33:25] <Anguel> where are the angstrom docs?
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  • [09:33:33] <av500> where is google
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  • [09:35:10] <Anguel> that's the problem with this irc channel, you don't get real help
  • [09:35:35] <av500> come on
  • [09:36:13] <KotH> Anguel: we dont hold hands, yes
  • [09:36:17] <Anguel> yes, you are told to go and learn linux for 10 years and then come back to ask. the problem is that there are some very specific things to angstrom
  • [09:36:29] <KotH> Anguel: then ask specific questions
  • [09:36:30] <av500> like?
  • [09:36:34] <av500> exactly
  • [09:36:45] <KotH> Anguel: i'm here for quite some time, and most of my questions get answered
  • [09:36:52] <Anguel> yes, where can I find angstrom docs?
  • [09:36:55] <KotH> Anguel: but i know that i have to use google first
  • [09:37:06] <KotH> Anguel: use google. we dont hold your hands or teach you how to read
  • [09:37:16] <Anguel> KotH: Imagine, I have googled
  • [09:37:28] <av500> I have to admit: http://www.linuxtogo.org/gowiki/Angstrom looks dead to me
  • [09:37:31] <av500> koen: ^^^^
  • [09:37:39] <KotH> Anguel: https://www.google.com/search?q=angstr%C3%B6m+docs
  • [09:38:01] <av500> lol, Kevin Boone as 1st hit :)
  • [09:38:17] <KotH> av500: it's your fault ;)
  • [09:38:21] <av500> yes
  • [09:38:38] <av500> yet another large open source project I ....caused
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  • [09:39:26] <koen> http://www.linuxtogo.org/gowiki/ is dead indeed
  • [09:39:36] <koen> elinux.org is all the rage now
  • [09:40:02] <av500> koen: update your links then
  • [09:41:11] <koen> already did for http://www.angstrom-distribution.org/
  • [09:42:08] <av500> erm
  • [09:42:11] <av500> wiki link still goes bad
  • [09:42:47] * tema (~tema@ppp89-110-16-82.pppoe.avangarddsl.ru) Quit (Ping timeout: 260 seconds)
  • [09:42:51] <av500> same for Faq
  • [09:42:56] <koen> ah, the tab
  • [09:43:02] <av500> yes
  • [09:43:04] <av500> the tab
  • [09:43:20] <av500> elinux.org?
  • [09:43:24] <av500> nothing more specific?
  • [09:43:44] <koen> no, I want people to hit the linux frontpage
  • [09:43:50] <Anguel> yes that was my problem, this wiki link did not show anything about Angstrom :(
  • [09:44:11] <Anguel> but this was probably on purpose :)
  • [09:44:14] <av500> Anguel: do you have a specific question?
  • [09:44:18] <av500> to be answered?
  • [09:44:18] <koen> Anguel: what was angstrom specific about your problem?
  • [09:44:28] <av500> or just lamenting general lack of "docs"
  • [09:44:31] <koen> iirc with has about touchscreens
  • [09:44:56] <koen> hmmm
  • [09:45:11] <koen> maybe I should setup a proxy service
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  • [09:45:22] <koen> one that automatically replaces "linux" with "angstrom"
  • [09:45:22] <kashi> Hi
  • [09:45:27] <koen> all the docs people need
  • [09:45:33] <koen> "how do to <foo> in linux"
  • [09:45:56] * kashi (6f77abe4@gateway/web/freenode/ip.111.119.171.228) Quit (Client Quit)
  • [09:46:09] <av500> Anguel: ?
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  • [09:47:01] <Anguel> maybe some kind of overview to get started with, e.g. how services are started etc.
  • [09:47:20] <av500> that is systemd
  • [09:47:25] <av500> not angstrom specific
  • [09:47:25] * kashi (6f77abe4@gateway/web/freenode/ip.111.119.171.228) Quit (Client Quit)
  • [09:47:26] <Anguel> in the meantime i found out but this was a problem
  • [09:47:59] <Anguel> you are right, but not every linux people know uses systemd
  • [09:48:20] <av500> true
  • [09:49:13] <Anguel> the other problem i had was to find where actually the files that define the cape drivers can be found, the device tree overlays if i understood correctly
  • [09:49:57] <Anguel> i browsed on github but could not find the touchscreen drivers
  • [09:50:50] <av500> right
  • [09:50:54] <av500> I failed to do that too
  • [09:53:59] <mouha> 4D systems website is somewhat vague about this
  • [09:54:07] <mouha> documentation included
  • [09:56:11] <Anguel> all the hw manufacturers are just making money and as these products are meant for development, they just don't care if they work or not
  • [09:56:46] <KotH> Anguel: not true
  • [09:56:49] <Anguel> if something does not work they tell you: go and ask the linux developers
  • [09:57:07] <av500> Anguel: so you have the LCD cape and it does not work?
  • [09:57:11] <KotH> Anguel: the problem is that too many people who have no clue start using them. so they dont have the time and money supporting them all
  • [09:57:35] <Anguel> yes it definitely does not, they confirmed it
  • [09:57:42] * vvu|Log (~vvu|Log@188.26.116.4) Quit (Ping timeout: 264 seconds)
  • [09:57:42] <av500> they who?
  • [09:57:44] <av500> what cape?
  • [09:57:49] <KotH> Anguel: you need huge resources to support end users, and the margins on the electronics you buy does not provide the money to finance those resources
  • [09:58:03] <av500> KotH: that is not relevant here.
  • [09:58:05] <KotH> Anguel: broken by design?
  • [09:58:08] <KotH> av500: hmm?
  • [09:58:12] <av500> if he bought a cape that does not work, he should return it
  • [09:58:18] <av500> thats simple
  • [09:58:22] <KotH> ah.. yes
  • [09:58:27] <KotH> forget what i just said
  • [09:58:29] <av500> if it does not work by design, even worse
  • [09:58:30] <KotH> and listen to av500
  • [09:58:36] <KotH> he is bigger and stronger than i am anyways ;)
  • [09:58:57] <Anguel> i have described everything here: https://groups.google.com/forum/#!msg/beagleboard/SXTaSUf4aSk/nIyYbs0msNsJ
  • [09:59:53] <av500> ah right
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  • [10:00:21] <av500> Anguel: return both capes
  • [10:01:03] <av500> if both companies cannot make the TS to work, they should not sell it
  • [10:01:05] <av500> and take it back
  • [10:01:14] <Anguel> i will, i have contacted them again and wait for their answer
  • [10:01:21] <av500> ok
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  • [10:02:28] <Anguel> but koen told me that i should try to tweak the driver to use 16x adc averaging, unless i know where to find that driver in the kernel code i cant't check if i am able to do it
  • [10:03:21] <av500> https://github.com/beagleboard/kernel/tree/3.8
  • [10:03:30] <av500> check that out
  • [10:03:31] <av500> 3.8 branch
  • [10:03:33] <av500> run the script
  • [10:03:43] <av500> and you have the full kernel source and all the DT files
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  • [10:06:15] <Anguel> ok, so i have to git it and patch it, correct?
  • [10:07:33] <Anguel> thought i would be able to see the files on github directly
  • [10:07:42] <cverster> LetoThe2nd: How are you? I've re-flashed my beaglebone, then I re-installed mysql, and still it tells me it cannot find that library file
  • [10:07:51] <cverster> heres a full explanation: http://pastebin.com/P3chC7Ja
  • [10:08:02] <cverster> what flags did you activate on cmake ?
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  • [10:23:23] <cverster> fixed it :D
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  • [11:17:34] <av500> Anguel: sadly no
  • [11:17:42] <av500> gihub has only vanilla kernel and patches
  • [11:18:29] <mru> using git to store patches is just so wrong
  • [11:19:05] <av500> dont tell me
  • [11:19:20] <mru> I can understand why you might do that with cvs
  • [11:20:08] <koen> I asked what people preferred: a branch that gets rebased or patches + script
  • [11:20:15] <koen> the rebase hate was overwhelming
  • [11:20:24] <mru> clearly you didn't ask enough sane people
  • [11:20:32] <koen> we're talking about beagle user
  • [11:20:33] <koen> s
  • [11:20:55] <mru> they're not generally qualified to know what they want
  • [11:21:18] <av500> koen: you did not ask me
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  • [11:31:57] <Ralf_> Hi guys, just a quick question: Does anybody know how to rotate the LCD on BBB? There seems to be a problem with 240x320 resolution when calling xrandr.
  • [11:34:17] * ezequielgarcia (~elezegarc@190.2.109.246) has joined #beagle
  • [11:34:55] * LetoThe2nd would use xrandr to rotate ...
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  • [11:36:57] <dathui> hi, i'm thinking of trying to prototype something, it's a sort of router/firewall/thingy so I need a board with two ethernet ports and then do some filtering and so on. have people done similar things on the beagleboard? any of you got an idea how hard or easy, in rough terms, that might be?
  • [11:37:28] <LetoThe2nd> dathui: you can add a second eth over usb. thats about all.
  • [11:37:59] <Ralf_> well, that was my first guess. display turns white. @dathui: Take a linksys router....
  • [11:38:19] <LetoThe2nd> Ralf_: hm, no idea then.
  • [11:38:34] <Ralf_> ok. thanks
  • [11:40:07] <dathui> @Ralf_ I don't need an actual router :) that's just a close enough similarity why I need two ethernet ports
  • [11:40:15] <dathui> LetoThe2nd: oki, thanks
  • [11:41:08] <av500> use a PC with 2 NICs
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  • [11:54:21] <dathui> av500: My reasoning was that getting a beagle board would be cheaper than a computer with 2 nics.
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  • [11:59:03] <av500> well, beagle has only 1 NIC
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  • [11:59:09] <av500> of course you can add one via USB
  • [11:59:31] <XorA> Beagle XM + Zippy 2 :-)
  • [11:59:42] <dathui> Zippy? *googling*
  • [12:00:12] <dathui> ah :)
  • [12:00:30] * vvu|Log is now known as vvu|Log_away
  • [12:01:25] <XorA> dathui: there are el-cheapo avr32 boards with two Nics
  • [12:01:34] <XorA> dathui: and I think they are still supported in OE
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  • [12:02:21] <thangng> I got a problem with camera cape on Beaglebone? Could any one help?
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  • [12:02:30] <dathui> XorA: OE?
  • [12:02:45] <thangng> Driver Info: Driver name : cssp_camera Card type : cssp_camera Bus info : cssp_camera-000 Driver version: 3.2.42 Capabilities : 0x05000001 Video Capture Read/Write Streaming Compliance test for device /dev/video0 (not using libv4l2): Required ioctls: VIDIOC_QUERYCAP returned 0 (Success) test VIDIOC_QUERYCAP: OK Allow for multiple opens: test second video open: OK VIDIOC_QUERYCAP returned 0 (Success) te
  • [12:02:59] <XorA> dathui: Open Embedded, what Angstrom what came as default on beagles was built with
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  • [12:03:30] <dathui> XorA: ah, thanks.
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  • [12:11:56] <Anguel> av500: thanks for the kernel help, i downloaded, applied patches and now see the .dts files :) i will have to have a closer look top understand how they are connected, i expect that the lcd cape .dts use the adc somehow, that is configured somewhere else
  • [12:16:11] * vvu|Log_away is now known as vvu|Log
  • [12:17:07] <mouha> Anguel : maybe some I2C btw
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  • [12:17:45] <Anguel> mouha: what do you mean?
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  • [12:31:39] <mouha> Anguel: 4D cape also use I2C, therefore I think this something to keep in mind
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  • [12:32:18] <mouha> Anguel : as we were talking about FA display before, some settings were (are) set via I2C
  • [12:33:10] <Anguel> omg, now i see, the dts files are NOT in the kernel, they are in /libs/firmware in the image...
  • [12:33:40] <Anguel> in /lib/firmware
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  • [12:45:37] <StyxAlso> Hello, has anyone done continuous sampling with the BBB's ADC here?
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  • [13:01:12] <kishor> how can I setup wifi connectivity in Beaglebone black with Ubuntu 12.04 precise??
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  • [13:13:47] <beagleboone> hello!
  • [13:14:31] <vvu|Log> hey
  • [13:14:40] <Anguel> is there a way to view which dtbo is loaded?
  • [13:15:13] <koen> cat the slots entry
  • [13:16:28] <koen> Anguel: have you read https://docs.google.com/document/d/17P54kZkZO_-JtTjrFuVz-Cp_RMMg7GB_8W9JK9sLKfA ?
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  • [13:17:37] <beagleboone> i "bricked" my beaglebone by removing uEnv.txt from the internal emmc.(trying to force the bone to boot of the mmc card i inserted. now i am having trouble using the serialport (J1) of the beaglebone black. i dont get anything but "CCCCCC" when i try to boot.
  • [13:17:56] <av500> boot from SD
  • [13:17:59] <kishor> how to setup wifi in Beaglebone blck with ubuntu 12.04LTS
  • [13:18:02] <av500> reflash the emmc
  • [13:18:02] <Anguel> koen: thank you, did not know about this doc
  • [13:18:14] <koen> removing uEnvt.txt has no impact on the boot
  • [13:18:28] <koen> well, you don't get 'quiet' in bootargs anymore, but that's it
  • [13:18:47] <vmayoral> kishor: there're tons of tutorials
  • [13:18:51] <beagleboone> av500: well, that doesnt work either. so i guess getting some debugging output via the serial port would be nice. for what i know now. even u-boot maybe damaged
  • [13:18:53] <vmayoral> kishor: i personally like this one http://www.codealpha.net/864/how-to-set-up-a-rtl8192cu-on-the-beaglebone-black-bbb/
  • [13:19:10] <vmayoral> you can sort of follow the same route
  • [13:19:20] <koen> it's also here: http://elinux.org/BeagleBone_and_the_3.8_Kernel
  • [13:19:22] <vmayoral> you just need the sources and cross-compile it natively
  • [13:19:28] <av500> beagleboone: you cannot damage uboot on sdcard by writing to emmc
  • [13:19:43] * teralaser (~teralaser@unaffiliated/teralaser) Quit (Quit: CYAL8RALIg4t0r)
  • [13:20:11] <vmayoral> sorry
  • [13:20:16] <kishor> vmayoral: Thank you.
  • [13:20:16] <vmayoral> compile it natively
  • [13:20:23] <vmayoral> that cross- was wrong ;)
  • [13:20:37] * Criztian (~criztian@cust.dyn.95-152-98-145.swisscomdata.ch) Quit (Remote host closed the connection)
  • [13:20:45] <koen> vmayoral: I still wonder why my 8192cu works with the stock linux drivers and others don't
  • [13:20:52] <beagleboone> av500: ok. maybe the flash is damaged and it wasnt directly me. the thing is. i dont understand why i dont get anything written but CCCCCC to the serial. i googled arund for days and every site mentioning the serial talks about the u-boot boot text...and stuff.
  • [13:21:08] <beagleboone> so, what may i have done wrong that i dont see a u-boot console?
  • [13:21:18] <av500> get a "flasher" image
  • [13:21:27] <av500> boot from sd while pressing the boot button
  • [13:21:30] <av500> that works
  • [13:21:40] <vmayoral> koen: same here. I actually purchased 5 different wifi dongles (3 of them with the rtl8192cu chipset)
  • [13:21:43] <vmayoral> same result
  • [13:21:44] <av500> er, press the boot button while poweing up
  • [13:21:54] <vmayoral> got me really pissed.
  • [13:22:13] <beagleboone> av500: thanks, i allready did that. else i couldnt have tried to but from the mmc in the first place.
  • [13:22:21] <vmayoral> haven't given up though :)
  • [13:23:18] <beagleboone> can anyone with a beaglebone black confirm that they see some text from u-boot over the serial port (J1) ?
  • [13:23:27] <av500> I do
  • [13:23:56] <beagleboone> av500: what board and software versions do you run on your bbb?
  • [13:24:10] <beagleboone> i ment board revision
  • [13:24:15] <av500> dunno and dunno
  • [13:24:23] <beagleboone> av500: ok, thanks
  • [13:24:26] <av500> if it says CCCC it does not find MLO
  • [13:24:33] <av500> on emmc or SD
  • [13:24:35] <beagleboone> ha
  • [13:24:39] <av500> so, get an sdcard
  • [13:24:45] <av500> write the flasher image to it
  • [13:24:47] <av500> insert
  • [13:24:53] <beagleboone> av500: thats it, i remove MLO not uEnv.txt. from the emmc.
  • [13:24:54] <av500> boot while holding the boot button
  • [13:25:04] <av500> [15:24] <av500> so, get an sdcard
  • [13:25:05] <av500> [15:24] <av500> write the flasher image to it
  • [13:25:05] <beagleboone> i just mixed thatone up. mucho thankos!
  • [13:25:06] <av500> [15:24] <av500> insert
  • [13:25:08] <av500> [15:24] <av500> boot while holding the boot button
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  • [13:25:38] <beagleboone> av500: but, while pressing the boot button bbb should load MLo & stuff from mmc i assumed?
  • [13:25:58] <av500> no
  • [13:25:59] <av500> from sd
  • [13:26:06] <av500> why dont you read the docs?
  • [13:26:29] <beagleboone> av500: i want to run linux cnc on my beaglebone. there is allready an image that works for many people. but wit me it doesnt boot and i dont see nothing on the console.
  • [13:26:44] <beagleboone> av500: what sd? i have a mini mmc card slot
  • [13:26:54] <av500> sd/mmc
  • [13:26:58] <beagleboone> you are mixing up the internal mmc (emmc as its refered to) and mmc
  • [13:27:24] <beagleboone> in the docs there is written "push boot button to boot from mmc"
  • [13:27:53] <av500> s/mmc/mmc card/
  • [13:28:56] <beagleboone> well, ok, then i go the flasher image road. but. when its back to how i came to me out of the factory. i still dont have a serial console to see wats happening at bootup i assume
  • [13:29:29] <av500> depends
  • [13:29:42] * vvu|Log is now known as vvu|Log_away
  • [13:29:43] <av500> if you see the "CCCCC" it means you have a serial working
  • [13:29:52] <beagleboone> yes, thats true :)
  • [13:30:29] <beagleboone> and since you translated it for me it does even have a meaning :)
  • [13:30:41] <beagleboone> one more thing
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  • [13:32:24] <beagleboone> i got u-boot-beaglebone-2013.04-r0.img and MLO-beaglebone-2013.04 and copyd them to the boot partition of a freshly mkcard.sh'ed mmc. pressing boot and applying power does show nothing on the serial. anyone an idea?
  • [13:33:06] <av500> marked "active"?
  • [13:33:14] <av500> also "MLO"
  • [13:33:16] <av500> is the name
  • [13:33:16] <VirG> Hello People
  • [13:33:29] <av500> got a working image
  • [13:33:35] <beagleboone> yes, i renamed the files. im really not that stupid. really. i guess ;)
  • [13:33:45] <av500> not saying that
  • [13:33:55] <av500> partition needs to be active
  • [13:33:56] <beagleboone> no, youre trying to help :)
  • [13:34:10] <av500> get a flasher image
  • [13:34:14] <beagleboone> yes, i look at that. but the mkcard.sh script should do that. i take a look
  • [13:34:15] <av500> and start from there
  • [13:34:19] <av500> yes
  • [13:34:22] <av500> should
  • [13:34:49] <beagleboone> yes it has the boot flag set
  • [13:35:01] <beagleboone> so this should work
  • [13:35:28] <beagleboone> and has nothing todo with the emmc and missing MLO
  • [13:35:44] <beagleboone> so doing the magical whipe and copy would not change anything for me
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  • [14:05:58] <Arirf> hello
  • [14:06:10] <Arirf> any one there for help reha
  • [14:06:20] <Arirf> regarding beagle bone blacl
  • [14:06:35] <beagleboone> ok, cu folks
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  • [14:07:25] <Arif> hello
  • [14:07:32] <Arif> anyone there
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  • [14:34:51] <vmayoral> yes, what is it?
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  • [14:51:32] <Anguel> hmmm, i recompile the dts in /lib/firmware/ and get a new dtbo, however it looks like this new file is not used, although i changed the adc channels the touchscreen still works...
  • [14:52:07] <Anguel> do i have to do something more then recompile?
  • [14:52:27] <Anguel> the module seems to be loaded correctly
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  • [14:53:13] * canary is now known as Guest56003
  • [14:53:50] <Guest56003> Hello, anyone here that can explain why the BONE_D64 drivers isn't detected when I connect my B^3
  • [14:54:33] <Guest56003> All I get in the device manager is a entry for "Other devices" called BeagleBoneBlack with no drivers.
  • [14:54:46] <Anguel> Guest56003: did you install the driver through the exe?
  • [14:54:51] <Guest56003> yes
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  • [14:54:56] <Anguel> which os?
  • [14:55:05] <Guest56003> win 7 64-bit
  • [14:55:21] <Anguel> hm, works fine for me
  • [14:55:42] <Guest56003> It works in a Windows 8 box for me as well but my desktop is win7
  • [14:55:57] <Anguel> did you try reinstalling?
  • [14:56:11] <Guest56003> drivers, yes and reboot and whatever.
  • [14:56:48] <Guest56003> even found a signed driver on a forum but that didn't help either
  • [14:56:55] <Anguel> no idea, works here
  • [14:57:18] <Guest56003> could you please go into the device manager and check the hardware ids for the bbb
  • [14:57:29] <Guest56003> just to verify that I have the same.
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  • [14:57:47] <Guest56003> USB\VID_1D6B&PID_0104&REV_0308 and USB\VID_1D6B&PID_0104 is what I have
  • [14:58:08] <aphex> hello mates! this is regarding bbb and can-bus. i was searching the web, and found a lot of useful pages, but 1 thing is not 100% clear for me. is it possible to use just the can0/can1 pins, or do i have to use a tranciever ic, too? thanks
  • [15:00:24] * jevin (~jevin@72.12.217.220) Quit (Quit: Textual IRC Client: www.textualapp.com)
  • [15:00:33] <Guest56003> aphex: Sorry.. I don't know
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  • [15:01:15] <aphex> thanks Guest56003 :) anyone else?
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  • [15:06:53] <C2H6O_> having issues with beagleboard not being able to acquire an IP once it is disconnected from a network
  • [15:07:06] <C2H6O_> has anyone encountered anything like this?
  • [15:08:41] * emeb_mac (~ericb@72.223.90.58) Quit (Quit: emeb_mac)
  • [15:09:56] <Guest56003> C2H6O_: I haven't got that far yet :) Driver issues :(
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  • [15:10:52] <C2H6O_> ok :) good luck mate
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  • [15:18:55] <billybob1> C2H6O_ ethernet ? wireless ?
  • [15:20:13] <C2H6O_> Both actually
  • [15:20:20] <billybob1> there are known hotplug issues in the 3.8.x kernel. For instance the kernel i am using if you remove the sdcard and plug it back in while the bbb is running . . . the board will lock up within a minute or two
  • [15:21:03] <billybob1> on debian -> if i use "hotplug" in /etc/network/interfaces, i dotn aquire an IP at all
  • [15:21:34] <C2H6O_> yeah, that seems to be my issue as well
  • [15:21:56] <billybob1> you can ask one of the devs about it, but i think for now you're stuck with auto
  • [15:22:14] <C2H6O_> both interfaces work fine as a fresh boot, but if it gets disconnected, the interface won't reconnect
  • [15:22:37] <billybob1> disconnected how ?
  • [15:23:08] <C2H6O_> I unplug the card/cable
  • [15:23:23] <C2H6O_> which seems to point to hotplug detect issue which you are talking about
  • [15:24:40] <billybob1> I had my bbb up and runnign for 28 days -> booted from a tftp/nfs server, and connected to this network and channel with weechat. We're solar powered here, so when we switch to genset, and back to solar we lose local/internet connection for a couple minutes as our switch does self testing. the connection always came back on its own
  • [15:25:26] <billybob1> i dont use dhcp though on any of my linux system including the bbb. i use static ips
  • [15:26:03] <C2H6O_> hmm okay I'll try that
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  • [15:28:49] <C2H6O_> i tried disconnecting the wired interface through Wicd network manager and reconneting back
  • [15:29:03] <C2H6O_> but it doesn't obtain an IP
  • [15:29:07] <simi> how can I verify the wifi driver is working properly on BBB
  • [15:29:37] <billybob1> try connecting to a network ?
  • [15:30:02] <simi> is there any command??
  • [15:30:17] <C2H6O_> try: iwconfig
  • [15:30:23] <C2H6O_> and see if wlan0 or wlan1 shows up
  • [15:30:30] <C2H6O_> if it does, most likely the drive works fine
  • [15:30:51] <C2H6O_> check out /etc/network/interfaces file and uncomment the wireless part
  • [15:30:56] <C2H6O_> then reboot... worked for me
  • [15:32:39] * billybob1 is now known as m_billybob
  • [15:37:08] <simi> the problem is , i cannect the wifi dongle with bbb and from bbb command prompt I enter command iwconfig. But it shows 'command not found'
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  • [15:48:11] <C2H6O_> i'd use an ethernet connection at first to set it up
  • [15:48:18] <C2H6O_> install the iw package
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  • [15:53:45] <Anguel> noone can tell me how to update an dtbo? i have recompiled it in /lib/firmware/ but the new does not load for some reason :(
  • [15:55:07] <prpplague> Anguel: it depends on when you need them to load, the stock angstrom image also has dtbo's compiled into the kernel image
  • [15:55:10] <koen> the kernel has internal copies, so better update the uImage as well
  • [15:55:39] <Anguel> oh, now i seem to understand
  • [15:56:08] <Anguel> isn't there an option to override the initial?
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  • [16:02:25] <Anguel> can i disable the cape in the uEnv.txt and then load the new one?
  • [16:03:00] <Anguel> new dtbo
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  • [16:12:15] <RypRap1> NOTE: Do not plug in the cable to the board until after the
  • [16:12:15] <RypRap1> board is powered up.
  • [16:12:15] <RypRap1> (concerning HDMI) why is it written in RED on BBB pdf and website ?
  • [16:12:44] <_av500_> good question
  • [16:13:33] <RypRap1> especially if you want to make a tv/mediabox... u have to unplug hdmi cable each time ? lol..
  • [16:13:43] <_av500_> no
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  • [16:27:57] <thurgood> I thought the message was the opposite, don't plug/unlug while powered on
  • [16:28:26] <_av500_> whatever you do, just don't
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  • [16:31:09] <C2H6O_> LOL
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  • [16:37:43] <NickT> Hello all
  • [16:38:16] <NickT> I just got my BBB and I was wondering how can I setup USB internet access? Is that possible?
  • [16:39:03] * Criztian (~criztian@239-210.198-178.cust.bluewin.ch) Quit (Remote host closed the connection)
  • [16:39:21] <NickT> I am at root@beaglebone:~#
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  • [16:45:18] <RypRap1> setup in what way
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  • [16:53:57] <NickT> RypRap1 Can you setup a passthrough for the "internet" via a USB cable only?
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  • [16:56:46] <cagdaseckin> is there real desktop in beaglebone black
  • [16:56:48] <cagdaseckin> ???????
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  • [17:04:33] <prpplague> cagdaseckin: define "real desktop" ....
  • [17:05:26] <simi> so how can i setup iw interface for bbb?
  • [17:06:46] * CalcMan (~Calc@c-76-100-81-122.hsd1.md.comcast.net) has joined #beagle
  • [17:07:14] <NickT> I got this to work on Angstrom by modifying the /usr/bin/g-ether-load.sh script which sets up the USB Ethernet connection. I added 2 lines at the end of the file: /sbin/route add default gw 192.168.7.1 echo "nameserver 8.8.8.8" >> /etc/resolv.conf This adds a default gateway for the network carried over USB and adds a DNS server for resolving names - 8.8.8.8 is Google - change it to a local DNS server or your favorite external one a
  • [17:07:21] * ghoti (~paul@scratch.it.ca) Quit (Ping timeout: 276 seconds)
  • [17:07:39] <NickT> how do I access that file ?
  • [17:08:46] <NickT> sudo is not found
  • [17:09:04] <NickT> does the normal distribution not use sudo?
  • [17:09:19] * aphex (5403efe7@gateway/web/freenode/ip.84.3.239.231) Quit (Ping timeout: 250 seconds)
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  • [17:10:07] <stugs> You're logged in as root NickT
  • [17:10:09] <stugs> you don't need sudo
  • [17:10:19] <NickT> ok
  • [17:10:44] <NickT> so how can I modify usr/bin
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  • [17:12:25] <NickT> im getting it actually
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  • [17:15:35] <cagdaseckin> prpplague I'm new at bbb is there any link or book for it?
  • [17:15:47] * eikeon (~eikeon@140.147.245.140) Quit (Quit: eikeon)
  • [17:15:50] <_av500_> not really
  • [17:15:56] <_av500_> there is a book though
  • [17:16:04] <prpplague> cagdaseckin: you can link to everything from beagleboard.org
  • [17:16:27] <cagdaseckin> ?
  • [17:16:35] <jkridner> http://beagleboard.org/bad-to-the-bone
  • [17:16:56] <cagdaseckin> ok
  • [17:16:56] <m_billybob> av500 two books now
  • [17:17:30] <m_billybob> that make guys getting started with beaglebone now too
  • [17:17:34] <m_billybob> mitch
  • [17:17:45] <m_billybob> 128 pages . . .
  • [17:17:45] <jkridner> Matt Richardson
  • [17:17:50] <m_billybob> there ya go
  • [17:18:02] <_av500_> two ferraris
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  • [17:22:32] <m_billybob> jason, havent read much of either and none of yours but seems you cover much more material. tempted to buy your book based on the latter chapters alone ( device tree stuff ) we'll see though. read both tables of contents
  • [17:23:33] <m_billybob> tight on money and time rigth now so . . .tis the way it goes
  • [17:27:03] <simi> is there anynone please enlight me how can I setup iw interface for BBB?
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  • [17:44:06] <_vicash_> Hi. I have a Beaglebone black. Can I access the EEPROM from the MLO boot image ? I am building my own Angstrom image for the BBB and as part of that am tweaking MLO to access the EEPROM and verify the serial number of the BBB. Is it possible ?
  • [17:47:25] <_av500_> sure
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  • [17:49:44] <_vicash_> _av500_: is there an address for accessing teh EEPROM ? as per the beaglebone docs there is no such information
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  • [17:51:50] <_av500_> i2c
  • [17:52:01] <_av500_> you need to use i2c to read the eprom
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  • [17:53:40] <_vicash_> _av500_: can i write to the eeprom ?
  • [17:54:28] <akashsuresh> My beaglebone black switches on but does not boot when I connect it to a 5v Input.It works when connected by the usb though
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  • [17:59:29] <akashsuresh> My beaglebone black switches on but does not boot when I connect it to a 5v Input.It works when connected by the usb though.Can someone help
  • [18:00:27] <_vicash_> _av500_: thanks.
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  • [18:01:09] <_vicash_> akashsuresh: is it 5V 1A input ?
  • [18:01:53] <akashsuresh> 5V 2A
  • [18:03:43] <_vicash_> akashsuresh: use a multimeter and check if current flow is correct from your power supply
  • [18:04:05] <akashsuresh> Ok I will do that
  • [18:05:45] <akashsuresh> Though I would like to point out that if power output was not right,the beaglebone lights would not be on.In addition I noticed that wwhen i connect the power adaptor constantly the 2nd and 4th led alone keep blinking alternatively
  • [18:06:21] <_vicash_> akashsuresh: you can read the BBB System reference manual to see what the order of blinking LEDs mean.
  • [18:06:33] <_vicash_> then you can debug further. maybe it is pointing out something
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  • [18:13:07] <simi> why iwconfig is not working for 3.8.13?
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  • [18:14:22] <simi> please reply me.. why iwconfig is not working for 3.8.13?
  • [18:15:11] <vagrantc> you'd have to give more information...
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  • [18:19:59] <simi> like what??
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  • [18:20:26] <simi> i connect wifi dongle with BBB
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  • [18:22:12] <_vicash_> simi: run the command "dmesg" and check whether your wifi dongle has been loaded correctly and the drivers have loaded. if not then the dongle is not working
  • [18:22:40] * vagrantc (~vagrant@freegeek/vagrantc) Quit (Ping timeout: 264 seconds)
  • [18:22:41] <_vicash_> by that i mean that if the drivers are not loading correctly then the dongle will not work and hence iwconfig will not display anything
  • [18:23:07] <koen> simi: if you're still using iwconfig, you'll have to read http://wireless.kernel.org/en/users/Documentation/iw
  • [18:23:50] <_vicash_> koen: is it possible to write to the EEPROM from MLO ?
  • [18:24:18] <_av500_> yes
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  • [18:24:32] <_av500_> CPUs run SW
  • [18:24:34] <_av500_> film at 11
  • [18:25:27] * bzb (~bzb@192-0-226-240.cpe.teksavvy.com) Quit (Read error: Connection reset by peer)
  • [18:25:39] * _vicash_ checks BBB_SRM.pdf to find the right quotation for that...
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  • [18:28:08] <_vicash_> _av500_: Section 5.3.2 in BBB_SRM.pdf version A5.4 (latest) says that there is a test point to allow the device to be programmed. I thought this was a hardware test point
  • [18:30:15] <jegade> hi, did anyone has writen an device tree overlay?
  • [18:30:23] <jegade> i like to write one myself
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  • [18:31:26] <_av500_> ah
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  • [18:31:33] <_av500_> guess it the write enable pin
  • [18:31:38] <_av500_> it's
  • [18:31:45] <_av500_> yes, then you need to fiddle with that
  • [18:31:57] <_av500_> dont have schematics here
  • [18:32:08] <jegade> http://pastebin.com/AcmxqQ3u
  • [18:32:36] <jegade> here leds-gpio blocks
  • [18:35:06] <jegade> could i enable the pwm, spi, i2c without an custom overlay?
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  • [19:38:20] <_vicash_> _av500_: do you have an idea on how to view teh debug print messages from MLO ?
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  • [20:05:52] <cagdaseckin> I'm familiar with Arduino, PIC, Python,C++ programming but new at beaglebone. I want to use beaglebone in Machine Learning Algorithms and Wavelet transform. Python (I'm using pythonxy IDE) is perfectly done my works at PC. Here is my questions * Can I use Python in beaglebone? * If its possible how? * Can I use beaglebone desktop when programming (C/C++/java/python etc.) like using PC?
  • [20:06:07] <nomel> dude, it's just a linux pc
  • [20:06:15] <nomel> you can do anyhting yo ucan do on a normal linux pc ;)
  • [20:06:53] <nomel> and yes, you can use the desktop, but why use a 1GHz arm when you probably have something 10x faster (literally)?
  • [20:06:59] <thurgood> can do it, unless you run into memory limitations... will be slow though
  • [20:07:02] <nomel> (for development i mean)
  • [20:07:36] * jkridner (~jkridner@pdpc/supporter/active/jkridner) Quit (Read error: Connection reset by peer)
  • [20:07:53] <nomel> cagdaseckin: what i do is develop on a desktop computer and save the files to a network share
  • [20:07:58] <_vicash_> is this for a robotics project ? why would you program Java on a beaglebone ? it will burst into flames
  • [20:08:08] <cagdaseckin> I watch some tutorial but linux seems to hard to me :D
  • [20:08:18] <nomel> _vicash_: then why would you use python? it's slow than java.
  • [20:08:33] <_vicash_> i would use C
  • [20:08:42] <nomel> lol, and you're from the 70's.
  • [20:08:42] <cagdaseckin> yes it is a robotic project
  • [20:08:51] <cagdaseckin> :D
  • [20:09:08] <agmlego> cagdaseckin: Linux really is not that hard.
  • [20:09:11] <nomel> cagdaseckin: you wont have any trouble running python
  • [20:09:17] <agmlego> But the best way to learn Linux, is to use it.
  • [20:09:48] <nomel> cagdaseckin: c and c++, you'll either have to use something like eclipse to make compiling easy, or figure out how to compile stuff from the command lien.
  • [20:10:02] <cagdaseckin> java faster but pyhthon modules is easy
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  • [20:10:28] <nomel> the python package installer like easy_install works on linux
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  • [20:10:44] <nomel> so, hop on and run some code. see if it's fast enough for you.
  • [20:11:00] <nomel> and if it's not, you can always use something ilke swig
  • [20:11:03] <cagdaseckin> how can I do this? any link?
  • [20:11:29] <nomel> write the heavy lifting in c/c++, and use swig to convert it to a python module.
  • [20:11:38] <nomel> how can you do what? many things were mentioned.
  • [20:11:51] <spikebike> heh
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  • [20:12:03] <spikebike> I'd just start with python and stay there until it's too slow.
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  • [20:12:12] <nomel> yeah
  • [20:12:13] <cagdaseckin> How can i run python IDE on beaglebone desktop
  • [20:12:17] <nomel> and swig is pretty crazy easy at this point.
  • [20:12:19] <_vicash_> cagdaseckin: use "opkg" to install python and its modules on the Beaglebone. it might already be installed
  • [20:12:24] <agmlego> It is.
  • [20:12:39] <agmlego> Pythoin does a lot of the work of the Linux environment these days.
  • [20:12:41] * steph___ (5a297b71@gateway/web/freenode/ip.90.41.123.113) Quit (Client Quit)
  • [20:12:45] <spikebike> yeah the BBB examples for using GPIO pins is like 7 lines of python
  • [20:12:46] <nomel> cagdaseckin: just put the code on there, develop somewhere else.
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  • [20:13:14] <nomel> cagdaseckin: you can access your network shares on the beaglebone
  • [20:13:22] * nomel tunes out.
  • [20:13:28] <stephman> hi guys
  • [20:13:37] <_vicash_> cagdaseckin: develop on PC, and ssh code into BBB and run there.. u can use Vi/Emacs/pico/nano on the BBB as IDE
  • [20:13:41] <cagdaseckin> you are saying dont use beaglebone desktop to develop. am I right?
  • [20:13:48] <nomel> _vicash_: has it.
  • [20:14:08] <nomel> cagdaseckin: i'm saying you don't have to develop on th ebeaglebone, and it doesn't make sense to if ou have a nice comfy fast pc to develop on
  • [20:14:24] <stephman> could anyone point me on which toolchain I could install in order to design software for my BBB running angstrom ?
  • [20:14:46] <stephman> with gui
  • [20:14:51] <agmlego> stephman: What kind of software in what language on which platform to do what?
  • [20:15:05] <stephman> I'm programming in C
  • [20:15:16] <cagdaseckin> Thanks a lot.
  • [20:15:24] <agmlego> OK, so gcc is the compiler you want.
  • [20:15:25] <nomel> stephman: it's just linux, so look up how you would do it in linux :)
  • [20:16:05] <nomel> stephman: you have the gnome desktop, so look up how to make a gui program for gnome.
  • [20:16:18] <nomel> (assuming you're talking about running it natively rather than remotely)
  • [20:16:21] <stephman> thanks. There is nothing specific for beaglebone ?
  • [20:16:26] <agmlego> Not really.
  • [20:16:29] <stephman> at least the cpu ?
  • [20:16:33] <agmlego> It is just a machine, like any other.
  • [20:16:40] <agmlego> The CPU is an ARM, like any other.
  • [20:17:02] <nomel> stephman: your binaries wont run on different types of processors
  • [20:17:09] <nomel> stephman: but that's always the case.
  • [20:17:10] <stephman> ok
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  • [20:17:52] <nomel> there's nothing processor specific in c/c++/python/any sane language. :)
  • [20:18:00] <nomel> that's the whole point of having a programming language.
  • [20:18:47] <stephman> i though there was a specific toochain for beaglebone enabling designing gui and code + debugging through the ethernet or the usb.
  • [20:20:00] <nomel> stephman: there are remote debugging tools, but there's nothing beaglebone specific
  • [20:20:10] <nomel> unless you're using starterware or something non-linux.
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  • [20:20:33] <djlewis> or doing it on the beaglebone
  • [20:20:44] <stephman> ok
  • [20:20:45] <nomel> if you're cross compiling, you'll need the arm toolchain
  • [20:20:53] * fooblya_monad (~abaddon@93.84.64.152) Quit (Ping timeout: 248 seconds)
  • [20:20:58] <nomel> cross compiling meaning, compiling code for the beaglebone on a different cpu.
  • [20:21:42] <RypRap> stephman: there are out of box things for starter, yes, i think its more for demo purpose
  • [20:21:48] * jkridner (~jkridner@pdpc/supporter/active/jkridner) Quit (Read error: Connection reset by peer)
  • [20:22:32] <stephman> what is the most used toolchain ?
  • [20:23:08] <RypRap> on linux ?
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  • [20:23:30] <m_billybob> gcc i would venture
  • [20:23:49] <stephman> well. Linux or windows actually. But is there a way to compile anything on windows which would run under linux ?
  • [20:24:02] <m_billybob> yes
  • [20:24:17] <nomel> stephman: that's where a cross compiler comes in...and probably mingw. :)
  • [20:24:25] <m_billybob> linaro's gcc's have windows binaries too and they do work
  • [20:24:39] <RypRap> do u have beaglebone black already ?
  • [20:24:40] <m_billybob> this is in the context of windows to ARM or the BBB
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  • [20:25:25] <stephman> yes I've the BBB in hands since today. I'm currently updating it with the last version of angstrom.
  • [20:25:55] <RypRap> di u try to open bbb in ur browser ?
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  • [20:26:10] <stephman> I could use anyway windows or linux to install the toolchain. Gcc is nice and can be integrated in eclispe that I'm already using for other platforms
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  • [20:27:17] <stephman> I'm wondering however how to design gui then. I'm not familiar with PC application desiging. I'm usually programming microprocessors directly in C.
  • [20:27:23] <Vaizki> you can compile on the BBB itself
  • [20:27:28] <Vaizki> it's a normal linux computer
  • [20:27:34] <stephman> might not be powerful ... ?
  • [20:27:34] <Vaizki> any gui toolkit you want will run on it
  • [20:27:52] <Vaizki> well try it out before you dive into cross compiling
  • [20:28:02] <Vaizki> if you are doing your own software it's powerful enough
  • [20:28:16] <Vaizki> if you want to compile the kernel and gnome desktop every day yes it will suck
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  • [20:30:06] <stephman> I just need to design small applications. So I can try compiling from the BBB
  • [20:30:49] <Vaizki> yea don't make your life too hard from day one ;)
  • [20:31:11] <stephman> lol... yes this sounds a good recomendation...
  • [20:31:18] <stephman> I do agree...
  • [20:31:54] <stephman> so then it means installing the toolchain on the BBB. Can you than access remotely yhe BBB
  • [20:31:55] <stephman> ?
  • [20:32:28] <agmlego> Yup.
  • [20:32:30] <agmlego> SSH.
  • [20:32:33] <agmlego> Use PuTTY.
  • [20:32:43] <stephman> ok
  • [20:32:47] <spikebike> ssh my_bbb_ip
  • [20:32:47] <agmlego> And FileZilla to transfer the files over SFTP.
  • [20:32:55] <spikebike> then you can run vi, make, gcc, python, whatever
  • [20:33:02] <agmlego> (assuming you are on Widnows, which it sounds like you are)
  • [20:33:20] * koen (~koen@cl-267.ams-05.nl.sixxs.net) Quit (Ping timeout: 245 seconds)
  • [20:33:55] <Vaizki> as I said, it's a normal linux computer
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  • [20:34:11] <stephman> ok. I've got it...
  • [20:34:58] <stephman> thanks for your comments guys... I guess I've enought now to start....
  • [20:35:04] <Vaizki> a lot of people come to this channel and say "I want to run xxx and yyy on BBB" and 99% of the time it's just them thinking there's something special about the BBB but there isn't
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  • [20:35:10] <stephman> I'll be back soon ;-)
  • [20:35:15] <ssi> there is something special about the BBB
  • [20:35:17] <ssi> it's $45 :P
  • [20:35:24] <RypRap> open 192.168.7.2 ;)
  • [20:35:44] <Vaizki> ssi: yea I know. but running stuff on it.. mostly nothing specia
  • [20:37:05] <Vaizki> and people also drop into the channel to ask which linux distribution supports i2c or usb webcam xyz.. again 99% of the time it doesn't matter what distro you have :)
  • [20:38:47] <stephman> I've to say that documentation is not always clear. There is so many possibilities to code with that for people not familiar with it may be confusing at begining
  • [20:38:51] <stephman> this is my case.
  • [20:39:15] <Vaizki> yes because it's a normal linux computer :)
  • [20:39:24] <stephman> ah yes...
  • [20:40:19] <Vaizki> if you have not used linux and you jump into BBB then you are basically tackling 3 things at once.. Linux, embedded ARM Linux and the BBB hardware
  • [20:40:36] <Vaizki> out of which 95% is Linux, 4% is embedded ARM linux and 1% is BBB
  • [20:41:13] <Vaizki> your idea of ratios may vary, I just pull this out of my hat naturally
  • [20:41:55] <nomel> your butt numbers seem sane to me.
  • [20:41:57] <nomel> err..hat numbers.
  • [20:42:02] <Vaizki> anyway, it will seem like BBB is daunting - compared to Arduino for example - but it's the huge "stack" that you're jumping into that looks insurmountable
  • [20:42:32] <Vaizki> Arduino folds the whole stack into a single window with a compile + run button
  • [20:42:52] <RypRap> on BBB too
  • [20:43:03] <nomel> but, once you get going, you have SO many more libraries and capabilities that have been in development for, literally, decades upon decades.
  • [20:43:08] <RypRap> with node.js in ur browser ;)
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  • [20:43:15] <Vaizki> yea I guess there's some stuff like that on the default BBB image.. I have never connected a monitor to it or anything
  • [20:43:29] <RypRap> nothing to install to dev on BBB ;)
  • [20:43:30] <Vaizki> I just nuked it and put Arch on it :)
  • [20:43:51] <RypRap> u dont need monitor
  • [20:44:01] <Vaizki> RypRap: yes but I would say that a lot less people stay within that newbie sandbox than do with Arduino
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  • [20:44:44] <nomel> it would be cool if sysfs interfaces could be "executed". like "/sys/class/gpio/export 11"
  • [20:44:53] <nomel> so, executed or read as files.
  • [20:45:14] <Vaizki> hmmh
  • [20:45:27] <Spirilis> wonder if binfmt_misc could simulate that
  • [20:45:33] <Spirilis> haven't looked at that in years though
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  • [20:47:06] <Spirilis> i.e. register the header strings of the file with binfmt_misc and have it execute a script to carry out the feature
  • [20:47:20] <Spirilis> well, would need execute bit on the file though
  • [20:47:32] <nomel> so have it. not like it's a real file anyways.
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  • [20:47:43] <nomel> err..physical file at least.
  • [20:47:54] <Spirilis> might need a kernel patch to change its permissions, not sure
  • [20:48:01] <nomel> and, i was thinking have it pass the args as the data
  • [20:48:03] <nomel> rather than have ti run something.
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  • [20:48:13] <Spirilis> yes, that's how binfmt_misc works
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  • [20:48:15] <nomel> ahh
  • [20:48:27] <Spirilis> the args would be passed to the 'helper' program that binfmt_misc runs in surrogate
  • [20:48:30] <nomel> (i know nothing of those words)
  • [20:48:34] <nomel> ohh
  • [20:48:43] <nomel> i think having it be part of sysfs would be ideal.
  • [20:48:49] <Vaizki> it would be an interesting filesystem semantic to include execute as a filesystem level operation...
  • [20:49:07] <Spirilis> binfmt_misc is often used to make Java programs directly executable, Windows programs directly executable (via Wine) etc
  • [20:50:53] <nomel> i'm actually not sure what happens when a program is executed, so maybe the sysfs would just see a read if you tried to do it directly.
  • [20:51:02] <nomel> (as part of the driver)
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  • [20:52:22] <Vaizki> well first you'd need to make it executable to even try it :)
  • [20:52:23] <Spirilis> basically executing makes a syscall where the kernel swoops in, reads the file, tries to recognize its headers to determine what strategy to use for bootstrapping the program's execution
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  • [20:53:00] <Spirilis> if it finds a valid magic number or whatever, it'll go through loading the necessary linker library/etc (or in the case of binfmt_misc, treat it as executing a different 'helper' program)
  • [20:53:14] <Spirilis> arguments get shoved up into the environment for the new process
  • [20:53:32] <Spirilis> but yeah, kernel's first thing to check is "is the X bit set and accessible by this user?"
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  • [20:54:24] <Vaizki> if you managed to make an executable sysfs node and your driver spewed ELF when read() then it might work
  • [20:54:41] <Vaizki> and you would get killed on the LKML in 2 seconds :D
  • [20:54:51] <mru> I suspect it would not work
  • [20:54:52] <Spirilis> nW
  • [20:54:54] <Spirilis> er
  • [20:54:55] <Spirilis> naw
  • [20:54:59] <Spirilis> binfmt_misc
  • [20:55:12] <Spirilis> leave the driver as it is, just make sure the 'x' bit gets set
  • [20:55:17] <Vaizki> yea... but just thinking out loud
  • [20:55:22] <nomel> yeah, how would the sysfs driver know it was being read by the system and not by someone doing an echo
  • [20:55:24] <Spirilis> it'd be a funny hack either way
  • [20:55:26] <mru> executing an elf file requires mmap-like capabilities
  • [20:55:29] <nomel> and, how would you know that the system would never echo.
  • [20:55:33] <stephman> well, I've corrupted my eMMC.... You should think about removing the SD before rebooting after update.... AND not remove the SD when booting again.
  • [20:55:46] <Vaizki> mru, yea that's true. just use a.out!
  • [20:55:51] <stephman> I'm now good to start again.... It take 1h !
  • [20:55:59] <mru> Vaizki: same problem
  • [20:56:09] <mru> a shell script could work
  • [20:57:03] <nomel> stephman: i run off of sd cards :)
  • [20:57:31] <nomel> slower, but the time it takes to get up and running after an emmc corruption, and the fact that the emmc will go bad one day, makes the emmc unusable in my application.
  • [20:57:32] <mru> I run away from sd cards
  • [20:57:57] <nomel> if mine goes bad, i just pop in a new sd card with the image already on it.
  • [20:58:13] <nomel> mru: then you should run away from the emmc. what's the difference? besides wider data bus? ;)
  • [20:58:13] <stephman> well how do you update your system without SD ?
  • [20:58:22] <nomel> i put the os on the sd card.
  • [20:58:28] <nomel> and boot from the sd card.
  • [20:58:29] <mru> nomel: did I say I don't?
  • [20:58:55] <Vaizki> stephman: various ways but none of them as simple as sd...
  • [20:59:02] <nomel> plus...i needed the pins the emmc used. >:-(
  • [20:59:12] <stephman> ok.
  • [20:59:23] <nomel> stephman: m_billybob boots from a network share :D
  • [20:59:40] <Vaizki> and I don't think reflashing the whole eMMC is a normal OS upgrade :P
  • [20:59:42] <stephman> updating from the SD is fine for me but I'll keep it in minde
  • [20:59:53] <stephman> mind*
  • [20:59:57] <Vaizki> update from the network
  • [21:00:01] <_vicash_> stephman: u can use bonescript if u want to write simple apps
  • [21:00:15] <nomel> does "shutdown -f" properly handle flushing disk caches and stuff?
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  • [21:00:34] <stephman> bonescript is java right ?
  • [21:00:35] <_vicash_> nomel: run sync and then shutdown to make sure it actually does
  • [21:00:46] <nomel> oh sweet, thanks.
  • [21:00:48] <_vicash_> stephman: bonescript is javascript-like
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  • [21:01:00] <stephman> I would prefer C
  • [21:01:15] <nomel> i'm amazed that people still use c for trivial stuff.
  • [21:01:19] <stephman> actually. I don't want to spend time learning a new language
  • [21:01:30] <nomel> but, i'm amazed that people get off by beating each other with wooden dildos too...so...
  • [21:01:34] <_vicash_> stephman: tehre is a cloud9 or similarly named image that provides an IDE where u can write it.. javascript follows a C-like syntax.. it is much easier
  • [21:01:49] <stephman> nomel: C remains the low level language that workds on all platforms
  • [21:01:52] <_vicash_> You should use the best tool for the job
  • [21:01:53] <Vaizki> well just install gcc then
  • [21:02:06] <stephman> yes. I'll use gcc
  • [21:02:40] <Vaizki> I don't see anything wrong in using C if you like working with it
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  • [21:02:51] <nomel> stephman: if you need low level, sure. but most people don't need low level when they think they do.
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  • [21:03:13] <stephman> _vicash_: easier depending from where you come from. I'm programming in C since 20 years so even there are many others good languages. The best one is still the one you know....
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  • [21:03:18] <nomel> and still, python, java, c++, delphi, all are cross platform.
  • [21:03:52] <nomel> stephman: i just learned c++ a few months ago. lets race at a string operation ;)
  • [21:03:53] <_vicash_> stephman: i have written some C code for the BBB directly on the BBB.. it is slow but it works.. use "opkg" to list the packages available and install the ones u need
  • [21:03:56] <Vaizki> and php! php! pick php!
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  • [21:04:42] <_vicash_> by slow i mean typing on the BBB through SSH is not as fast as it is on a regular PC.. but otherwise it is pretty much the same
  • [21:04:54] <Vaizki> eh?
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  • [21:05:05] <nomel> _vicash_: did you know you can transfer files between computers ;)
  • [21:05:05] <Vaizki> you must type damn fast
  • [21:05:14] * Bundestrojaner predicts a religious war^^
  • [21:05:23] <Vaizki> JIHAD!
  • [21:05:24] <nomel> dvorak rules! qwerty sucks!
  • [21:06:24] <_vicash_> nomel: if u r editing/debugging code better to do on the machine u r testing on.. moving files slows the process down.. plus i am doing this as a home project.. if it is a work project sure . slower the better
  • [21:06:26] <stephman> ok. time to sleep here. I should be back soon with again basic questions.... ;-)
  • [21:06:33] <stephman> cheers
  • [21:06:36] <stephman> and thanks
  • [21:06:47] <nomel> _vicash_: i don't move files. i do everything from a network shore :)
  • [21:06:50] <nomel> *share.
  • [21:06:58] <Vaizki> how is typing over ssh to the BBB slower than typing to a local process on a PC? :O
  • [21:07:16] <nomel> Vaizki: the keyboard interrupts travel slower over the network.
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  • [21:07:55] <_vicash_> well if u have a large piece of code, try scanning it using Ctrl+D in Vi and u can see teh Beaglebone react much slower
  • [21:07:57] <Bundestrojaner> keyboard interrupts on the network?
  • [21:07:58] <Bundestrojaner> they should be buffered on the system connected to the keyboard...
  • [21:08:12] * vvu|Log_away is now known as vvu|Log
  • [21:08:55] <_vicash_> the problem is not the typing but the fact that file system access is slow because of the SD card.. i run a custom Angstrom build so i dont use the eMMC. i keep that as a backup in case my custom build doesnt work
  • [21:09:23] <_vicash_> nomel: u use NFS ?
  • [21:09:33] <_vicash_> nomel: how is hte performance of that ?
  • [21:09:50] <_vicash_> nomel: what if u unplug the beaglebone from the internet, what is the failure rate ?
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  • [21:39:04] <Bundestrojaner> I'm thinking about getting a SOC - Beaglebone Black or Raspberry...
  • [21:39:04] <Bundestrojaner> BBB seems to win nearly everything but graphics.
  • [21:39:04] <Bundestrojaner> But I've read, BBB is more difficult for beginners than Pi because of a smal(ler) community?
  • [21:40:55] <SyNko> hi
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  • [21:41:06] <SyNko> nobody here running a freebsd on it?
  • [21:41:34] <SyNko> i want to build a image
  • [21:41:36] <SyNko> for it
  • [21:41:54] <SyNko> but i think is time wasted if isnt stable yet... :)
  • [21:43:26] <_av500_> the BBB is quite stable
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  • [21:46:45] <Vaizki> talking about C vs node.js etc.. http://helloworldquiz.com/
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  • [21:47:07] <Vaizki> I got 2600.. which is a nice number..
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  • [21:48:40] <swilshy> dd to microsd card through beagle bone? I have usb and ethernet access to beaglebone and I'm trying to write a new OS image to the microSD on my beaglebone but I don't have the microSD to SD converter. The beaglebone unit is the only thing I own that can read the card. Do I have any options?
  • [21:49:22] <Bundestrojaner> swilshy: your mobile phone should use microsd too
  • [21:50:26] <swilshy> it does... hmmm, so you mean, write to it from my phone?
  • [21:51:51] <Vaizki> yes you can dd to the uSD from the bone
  • [21:52:53] <swilshy> great! so if I have the image on an external HD attached to the bone, I can dd from HD to microSD and then boot off it?
  • [21:53:12] <Vaizki> yes.. but where did you boot the beaglebone from?
  • [21:53:22] <swilshy> original factory angstrom
  • [21:53:28] <swilshy> not on the card
  • [21:53:35] <Vaizki> oh ok beagle bone BLACK then :)
  • [21:53:39] <swilshy> yes! haha
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  • [21:54:23] <Vaizki> so .. no prob. but you have to boot with the uSD inserted, I don't think the BBB still recognizes uSD inserted after boot...
  • [21:54:44] <vvu|Log> cpu_to_le32 makes it MSB first or LSB first ?
  • [21:55:29] <Bundestrojaner> is the Flash of BBB faster than ??SD?
  • [21:55:57] <mru> vvu|Log: if you're on a little endian system (like arm) that sounds like a nop
  • [21:56:25] <Vaizki> arm is bi-endian isn't it :)
  • [21:56:26] <swilshy> ok, thank yo so much. I will give it a try.
  • [21:56:44] <vvu|Log> mru: LE is not least sig byte in the lowest slot value ?
  • [21:57:12] <Vaizki> swilshy: not sure but I remember that some stock ??ngstr??ms may have a uEnv.txt that boots from uSD if it finds one, even if you don't press the boot button
  • [21:57:29] <Vaizki> which could be a problem
  • [21:57:51] <vvu|Log> if i try to encode int x=1 in LE should i have 00 00 00 01 ?
  • [21:58:04] <vvu|Log> or i`m just talking jibberish here
  • [21:58:47] <mru> Vaizki: not really any more
  • [21:59:50] <mru> vvu|Log: that's jibberish without more context
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  • [22:01:00] <Vaizki> we want pdp-endian back
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  • [22:01:01] <vvu|Log> ok i should go back to my studies :)
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  • [22:01:39] <Vaizki> well actually by misaligning a 32bit word in arm you get pdp-endian.. hmmm
  • [22:01:46] <mru> nope
  • [22:01:50] <mru> not any more
  • [22:01:57] <Vaizki> doh
  • [22:02:01] <Vaizki> YOU BROKE EVERYTHING
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  • [22:02:10] <mru> that went away with armv6
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  • [22:05:25] <nomel> you just get lesser performance with misaligned, like all systems.
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  • [22:06:21] <mru> depends on how it's misaligned
  • [22:07:01] <mru> reading a 32-bit word has no penalty wherever it is in a 16-byte aligned block
  • [22:08:34] <mru> and an unaligned load/store done in hardware is always cheaper than doing it manually in software
  • [22:08:59] <nomel> wa?
  • [22:09:24] <nomel> arm can access a 32-bit word anywhere in a 16-byte memory block, at the same speed?
  • [22:09:45] <nomel> how big are the registers?
  • [22:09:48] <mru> cortex-a8 can at least
  • [22:10:06] <mru> that's because the cache interface is 128-bit
  • [22:10:31] <vvu|Log> people any idea if RNDIS init is done on the Bulk transfer or Interrupt ?
  • [22:10:36] <mru> so whatever 32-bit range you're asking for, it can pull an entire 128-bit block and extract the part you want
  • [22:11:08] <mru> if you cross a 16-byte boundary, it needs to do two cache reads
  • [22:11:12] <mru> and that slows things down
  • [22:11:28] <nomel> ah interesting.
  • [22:12:06] <nomel> does this assume the data is in cache, or will the memory be read in 16byte chunks?
  • [22:12:28] <mru> if you miss cache, it's a different story entirely
  • [22:12:50] <mru> well, not entirely
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  • [22:13:27] <nomel> i get it.
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  • [22:13:52] <mru> of course an unaligned load can trigger _two_ cache line fetches
  • [22:14:05] <mru> if you cross cache lines
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  • [22:15:23] <ds2> when did ARM started allowing unaligned loads?
  • [22:15:34] <nomel> a7 right?
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  • [22:16:08] <vvu|Log> ds2: do you have any knowledge of RNDIS? i`m more interested about the RNDIS init messages if they go over USB interrupt or bulk ? i cannot find info on this
  • [22:16:18] * keesj (~keesj@pc-020965.clients.vu.nl) Quit (Ping timeout: 264 seconds)
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  • [22:16:37] <ds2> vvu|Log: not on that level, no.
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  • [22:16:55] <vvu|Log> i`m trying to remove the need of RNDIS HOST DRIVER from the kernel
  • [22:17:05] <vvu|Log> at least to remove one more kernel config and make the app more generic
  • [22:17:11] <nomel> usb spy?
  • [22:17:18] <ds2> couldn't you use the USB MON to figure out which ep it winds up on?
  • [22:17:37] <vvu|Log> but again activating usb mon on android...anyway it`s really shitty
  • [22:18:21] <nomel> does anyone have gnome running on android?
  • [22:18:39] <nomel> or some other desktop?
  • [22:19:13] <nomel> (i'm android dumb)
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  • [22:19:47] <mru> wouldn't that be gnomoid?
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  • [22:24:44] <Vaizki> at least hemorroid if nothing else
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  • [22:59:28] <prpplague> LetoThe2nd: you know they tried to deliver the package yesterday right?
  • [22:59:35] <prpplague> LetoThe2nd: you going to pick it up?
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  • [23:10:53] <nomel> programming is hard.
  • [23:11:46] <Russ> debugging doubly so
  • [23:13:03] <prpplague> debugging hardware and software at the same time quadruple so
  • [23:13:43] <Russ> that's why reaching the ballmer peak is so important
  • [23:13:57] <prpplague> hehe
  • [23:15:02] <nomel> lol, so apparently pthread_mutex_timedlock returns EINVAL for *three* different, completely unrelated, conditions.
  • [23:15:17] * fooblya_monad (~abaddon@93.84.64.152) Quit (Ping timeout: 248 seconds)
  • [23:15:21] <ds2> stop making buggy hardware and software
  • [23:15:24] <ds2> it is all your fault!
  • [23:15:36] <Russ> I think at one of the early kernel conferences, developers sat down and said "EINVAL ALL THE THINGS!"
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  • [23:22:13] <nomel> it's sane if you don't think about it.
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  • [23:29:38] <nomel> is there any sanity in not optimizing to -O3 these days?
  • [23:30:38] <nomel> with something like the latest gcc with arm?
  • [23:31:38] <nomel> hahah, never mind.
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  • [23:32:07] <nomel> just checked the gpio pulses with -O2 vs -O3. doesn't look like the writes to the gpio registers are being flushed with -O3.
  • [23:32:28] <spikebike> heh
  • [23:32:36] <spikebike> I've run into similar with gcc and writing benchmarks
  • [23:33:10] <spikebike> You can't write to memory/memory mapped anything if you don't use the result (or at least potentially) or declare it volitile
  • [23:33:32] <spikebike> Sometimes if (this_will_never_happen) { read_var/memory/struct} is enough
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  • [23:33:52] <spikebike> but this_will_never_happen can't be resolvable at compile time
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  • [23:34:08] <nomel> i have the registers set to volatile, and i am reading them back...and i have the functions wrapped in "#pragma OPTIMIZE OFF"
  • [23:34:10] <nomel> wtf man.
  • [23:35:04] <Vaizki> gcc man
  • [23:36:14] <spikebike> got a link to that code?
  • [23:36:58] <nomel> spikebike: gpio code? you want it?
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  • [23:40:24] <nomel> i have a decent gpio, i2c, and eeprom library.
  • [23:40:52] <nomel> and a stupid complicated kernel module that would be a good introduction into most things kernel space.
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  • [23:41:21] <nomel> i could pass it under the table.
  • [23:41:48] <heff_> Has there been any word on SGX drivers for the Beaglebone Black? Are we still waiting on TI?
  • [23:41:49] <pkh> anyone know whether it's possible to read voltage values in a timeseries at around 2kHz?
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  • [23:42:46] <pkh> at the moment I'm looking into the option of considering it audio and pushing it through a DAC, but that feels like overkill... I'd prefer to be able to just connect it to an input and sample it at a couple kHZ
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  • [23:45:40] <Vaizki> pkh, pru
  • [23:46:24] <Vaizki> and for me, sleep
  • [23:47:31] <pkh> thanks and night.
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  • [23:49:11] <nomel> pkh, how accurate does your time step need to be?
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  • [23:49:24] <pkh> not 100%, a bit of jitter is ok.
  • [23:49:38] <nomel> well, 100% is impossible for anyone, what is a bit of jitter to yoU?
  • [23:50:02] <nomel> and are jumps to undefined jitter ok every once and a while?
  • [23:50:23] <nomel> you could probably get 2khz pretty easy with some c reading the adc regs
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  • [23:50:44] <nomel> but, you would get random unknown glitches with cpu usage.
  • [23:50:59] <nomel> with the pru, you could read the adc registers, but you'll get some glitch from memory bus contention
  • [23:51:03] <pkh> at the moment it's a bit hard to define explicitly. but if I can get fairly accurate timing alongside the sample I can rebuild the signal later anyway.
  • [23:51:26] <pkh> I'm really going to have to suck it and see.
  • [23:52:06] <nomel> the jitter from the pru will be up to something like 30ns
  • [23:52:43] <nomel> BUT, it records the time it took, so you can have 5ns resolution for time.
  • [23:53:10] <pkh> with 500,000ns sample intervals (is my top-of-head maths right?)
  • [23:53:20] <pkh> @2kHz
  • [23:53:53] <pkh> then 30ns is well within requirements.
  • [23:54:25] <nomel> or, you could use a kernel driver to shut off interrupts, do the adc reads, get a good timestamp, then turn interrupts back on.
  • [23:54:32] <pkh> if it helps comprehending the constraints, the resulting timeseries will be fft'd and 1000 values will be kept representing up to 1kHz.
  • [23:54:38] <nomel> that's probably waht i'd do
  • [23:55:05] <nomel> you can set up timers interrupts in the kernel
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  • [23:55:16] <nomel> so you would write an interrupt handler to catch that timer interrupt
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  • [23:56:26] <nomel> you know, you'd probably be fine writing something in c/c++
  • [23:56:40] <pkh> just found this via google.
  • [23:56:41] <pkh> any reason not to use this as a starting point? (https://github.com/ZubairLK/adc-iio-continuous-sampling-userspace)
  • [23:58:27] <nomel> oh super cool! i didn't know about that. looks pretty new.
  • [23:58:46] <nomel> https://archive.fosdem.org/2012/schedule/event/693/127_iio-a-new-subsystem.pdf
  • [23:59:52] <nomel> comes with a timestamp too!