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  • [00:00:45] * Topic is 'http://beagleboard.org/chat has a guide on how to ask questions and links to the logs | never ask to ask, just ask | be patient | pastebin a boot log | http://ahsoftware.de/Beaglebone_Black_Boot_explained.svg | BBB is being sold faster than produced. Order one and wait. There is no other way. | http://i.imgur.com/CujBUQJ.jpg'
  • [00:00:45] * Set by KotH!~attila@lou-outside.kinali.ch on Fri Mar 21 14:24:39 UTC 2014
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  • [00:48:33] <MLM> I flashed my BBB with the Ubuntu 13.10 image (http://elinux.org/BeagleBoardUbuntu#eMMC:_BeagleBone_Black) and I am wondering what the default web server is running on (Apache, nginx, etc)?
  • [00:49:59] <syadnom> MLM netstat -tlpn
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  • [00:50:24] <syadnom> MLM, find port 80 on the list and it should tell you the program name and the pid
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  • [00:51:55] <syadnom> MLM, that said, it's apache...unless you have some other spin of ubuntu
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  • [00:52:51] <MLM> The command doesn't seem to list the pid: http://i.imgur.com/IRLvK4F.png
  • [00:54:39] <MLM> syadnom: ^^
  • [00:54:54] <cosmo1t> can't find my microsd adapter
  • [00:54:55] <cosmo1t> sigh
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  • [00:55:15] <syadnom> MLM should be just to the right of that. like 1234/apache2
  • [00:56:06] <MLM> syadnom: just dashes: http://i.imgur.com/i4uRXYM.png
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  • [00:56:35] <MLM> ahh got, need to run sudo
  • [00:56:40] <MLM> saw the comment
  • [00:57:11] <MLM> syadnom: yep, says apache, thanks :)
  • [00:57:28] <syadnom> k
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  • [01:16:27] <foreverska> what does << mean in Pru Assembly?
  • [01:16:40] <ds2> context?
  • [01:16:41] <hype_> logical shift left
  • [01:18:44] <foreverska> why would someone 7<<22 instead of just typing out the value? Just for the looks? I assume PASM compiles with this as a number
  • [01:18:58] <ds2> easier to correlate with docs
  • [01:19:16] <ds2> value 7 is shifted 22 bits probally cuz it has a 22bit offset
  • [01:20:07] <hype_> yep
  • [01:20:13] <foreverska> I guess I can kinda see that
  • [01:20:35] <hype_> writing 29360128 instead would be meaningless to most people
  • [01:20:36] <MLM> probably just need to pad `0111` with 22 zeroes
  • [01:21:03] <rhodric_> but much easier just to write 7<<22 ;)
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  • [01:21:36] <foreverska> gotcha. I'm coming from MSP430s where we had all of 6 outputs. lol
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  • [02:18:22] <foreverska> does beaglebone have something to work with zips?
  • [02:19:32] <pjustice> most linux distros include zip/unzip
  • [02:19:51] <Dan1> well... no... but usually the linux distro you use will
  • [02:19:55] <foreverska> debian doesn't out of the box I'm findign out
  • [02:20:10] <Dan1> regardless of wht hardware its being run on
  • [02:20:27] <MLM> is it a .zip or .tar.gz?
  • [02:20:32] <foreverska> .zip
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  • [02:22:32] <pjustice> some distros (*cough*redhat*cough*) just install everything, and thus take up many GB
  • [02:22:34] <Dan1> foreverska: might have to install "unzip" first
  • [02:22:49] <pjustice> Debian isn't quite as bad, but it's trivial enough to install the zip and unzip packages
  • [02:23:10] <Dan1> unless you can get a .tar.gz version of what ever file your trying to work with
  • [02:23:29] <foreverska> Unfortunately it doesn't have internet. I'll just unzip and tar it on the host
  • [02:24:51] <pjustice> probably the path of least resistance, but keep in mind that you can grab .deb packages from a repository, carry them to the bbb on a flash device, install them there
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  • [03:03:50] <jaw22> Hi, I am planning a BBB application that will require dealing with pin IO and binary data: bit shifting and operating on byte arrays. I find that the javascript support for the latter is weak. Is there documentation on accessing IO pins of the BBB at a lower level than bonescript?
  • [03:08:04] <jaw22> Derek Malloy's videos look promising
  • [03:08:10] <N2TOH> jaw22, yes try googing pasm
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  • [03:09:41] <N2TOH> jaw22, I am in contact with an MIT student who is writing assembly level code for the PRU cores in the BBB, his mastery of the platform is nothing less then magical.
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  • [03:13:18] <jaw22> that's a little lower than I was aiming for... I'm thinking more like C/C++ or Go (with CGo calls). Hopefully Go isn't a taboo word in this channel
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  • [03:19:20] <N2TOH> from what I have seen, playing in the mud can build up some awesome foundations for future castles
  • [03:20:54] <jaw22> :)
  • [03:21:35] <jaw22> I agree, I'm not afraid to really dig in. But If I write code for the PRU cores, will I be able to get it into userspace?
  • [03:22:38] <pjustice> do you really need that level of speed or fine control over timing?
  • [03:23:30] <N2TOH> I can post github references if you like, in the case of the HAM writing the code, yes he wrote a software R2R DAC that runs in the PRU hardware
  • [03:24:06] <N2TOH> he managed to write several sets of code to date, including AM and DSBSC
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  • [03:26:28] <jaw22> pjustice: no, I need basically no control over timing or speed. I just need access to IO pins to read analog values, and a type system that allows me to operate on raw binary, whereas Javascript appears to use IEEE floating point for all numbers, except when using bitwise operations, and I need deeper control than that
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  • [03:39:13] <pjustice> seems relevant, though all the crazy about "use bonescript" at the top seems a bit nuts to me - http://www.element14.com/community/community/knode/single-board_computers/next-gen_beaglebone/blog/2013/10/10/bbb--beaglebone-black-io-library-for-c
  • [03:41:06] <pjustice> but the library seems quite simple, and shows you how to do pin i/o
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  • [03:57:41] <jaw22> pjustice: thanks, it looks like that has evolved into https://github.com/VegetableAvenger/BBBIOlib
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  • [04:02:43] <pjustice> yeah, that version is not so simple :)
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  • [04:08:26] <jaw22> but the simpler one you linked doesn't support analog, apparently. the header file only lists is_high() and is_low()
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  • [04:30:53] <pjustice> sure
  • [04:31:15] <pjustice> the point is mapping /dev/mem gets you access to the control registers; the simple version is an easy to understand version of that
  • [04:31:35] <pjustice> the trm would give you the details for analog
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  • [04:35:38] <jaw22> trm?
  • [04:36:37] <hype_> technical reference manual
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  • [04:37:01] <hype_> http://www.ti.com/lit/ug/spruh73j/spruh73j.pdf
  • [04:37:29] <Dan1> jaw22: sorry if this is a dumb question, but are you talking about being able to get analogue off all the gpio pins or only the 7 current analogue pins?
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  • [04:54:11] <jaw22> just the analog pins :)
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  • [05:00:14] <Dan1> jaw22: ahh yea ok, i thought you may have found some mythical way to convert the other gpio's as well. had my hopes up for a little bit ;)
  • [05:05:20] <jaw22> Dan1: there are always external ADCs. Usually they have multiple inputs and higher resolution than those built into general purpose microprocessors
  • [05:06:35] <Dan1> yea once i get finished with what im currently playing with im going to look into that sort of thing for other uses... at the moment my brains just about in overdrive just trying to get working what i want and how i want it
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  • [05:10:44] <jplayer> Quick question: If I want to install debian onto a SD for a BeagleBoard Rev.C2, does the netinstall script on github cover all revisions of the board or do I have to do something specific?
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  • [05:45:00] <nyt-> jaw
  • [05:45:10] <nyt-> im about to gpl a full featured ruby lib for the bb
  • [05:48:02] * kiwichri_ (~kiwichris@118-92-198-217.dsl.dyn.ihug.co.nz) Quit ()
  • [05:48:07] <nyt-> supports all the features and a nice interface
  • [05:48:11] <nyt-> prob going to post it up this weekend
  • [05:48:50] <Dan1> you got anything online about what your actually doing nyt-? blog or something yet
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  • [05:51:42] <nyt-> nope i just wrote it this last week
  • [05:52:04] <nyt-> would have been done quicker had I not had to troubleshoot stupid adc kernel patches that broke adc functionality
  • [05:52:43] <nyt-> i'll pastebin my test file so far so you can see what using it looks like
  • [05:52:50] <nyt-> but im about to make it more oop friendly
  • [05:53:05] <nyt-> will function both ways in the end i reckon since some people are more happy with procedural
  • [05:54:15] <nyt-> http://pastebin.com/mH3zATDP
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  • [05:57:56] <jaw22> nyt-, I do declare that ruby is even worse than javascript for what I need to do
  • [05:58:05] <nyt-> you can glean most of the functionality from there
  • [05:58:21] <nyt-> jaw22: how is ruby worse than js? works fine for handling binary data and bitshifting
  • [05:58:31] <nyt-> are you just not familiar?
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  • [06:00:19] <jaw22> no, I guess not
  • [06:00:43] <nyt-> see what i pasted
  • [06:00:46] <nyt-> theres some binary operations in there
  • [06:00:57] <nyt-> for dealing with an mcp3008 over spi and some i2c stuff further down
  • [06:01:12] <nyt-> anyway was just mentioning it
  • [06:01:30] <nyt-> you can just access everything raw in c its not that difficult
  • [06:01:33] <nyt-> just ... a lot of code
  • [06:01:38] <nyt-> check out the adafruit python library
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  • [06:01:45] <nyt-> they basically do everything in C
  • [06:01:56] <nyt-> and just push the data back up to python
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  • [06:04:15] <jaw22> I highly appreciate that you have added BBB functionality in another language
  • [06:05:28] <jaw22> but if I were to use my favorite tool for this job (python), I would be using the wrong tool. I think ruby is not the right tool either
  • [06:06:06] <nyt-> what is the job?
  • [06:06:18] <nyt-> but yeah like i said, check the adafruit library if you want examples on how ot do things in c
  • [06:07:53] <nyt-> if you need really fast adc you'll have to write it in ASM and access the PRU but i think someone is working on a limited distribution c compiler to do that as well
  • [06:07:56] <nyt-> was mentioned earlier
  • [06:09:11] <jaw22> I think I'm going to rewrite BBBiolib. I like their approach of using the memory mappings. I do not like the file opening and reading in the Adafruit python library. That seems like unnecessary overhead
  • [06:09:19] <av500> jkridner: ^^^
  • [06:09:24] <av500> [07:51] <nyt-> http://pastebin.com/mH3zATDP
  • [06:09:26] <jaw22> But the BBBiolib api is silly
  • [06:10:02] <jaw22> the ADC access doesn't need to be PRU fast
  • [06:10:03] <av500> nyt-: please ping jkridner or me when you have released it
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  • [06:11:01] <nyt-> av500: sure, you have interest in it?
  • [06:12:33] * Shadyman (~matthew@unaffiliated/shadyman) Quit (Ping timeout: 240 seconds)
  • [06:12:35] <jaw22> of course, the platform has limited options right now
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  • [06:13:14] <nyt-> I basically need to write the docs, gemify it, and add an oop interface
  • [06:13:20] <nyt-> but functionality at this time is complete
  • [06:13:50] <nyt-> drove up to my friends house to pickup an mcp3008 the other night he was using for his pi since they dont have an adc
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  • [06:14:08] <nyt-> so was able to finish the spi codes
  • [06:14:16] <nyt-> which is quite interesting how the bbb does it
  • [06:14:24] <nyt-> not sure i like having only one dedicated CS pin per controller
  • [06:14:41] <nyt-> wonder if you can just leave it discon'd and use a gpio pin for CS instead
  • [06:14:43] <nyt-> dont see why not
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  • [06:24:01] <av500> nyt-: personally no, but we have an interest to share it to a larger audience
  • [06:24:32] <nyt-> ah ok
  • [06:24:39] <nyt-> i still have no idea who anyone is or what their involvement is
  • [06:25:12] <nyt-> i see youre opped but that doesn't tell me much ;)
  • [06:25:28] <tbr> I've been here for years, and I don't know. Don't worry.
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  • [06:49:10] <KotH> nyt-: av500 is the second biggest oss developer known to men
  • [06:49:20] <KotH> nyt-: and jkridner is beagle mom
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  • [07:07:15] <nyt-> lol whos the first
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  • [07:54:38] <jaw22> oh, PS nyt- the application is a true random number generator, which means that I need to access the ADC and do linear algebra in the same application xD
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  • [07:56:54] <jaw22> and make http calls
  • [07:58:18] <jaw22> I am beginning to think that python actually *is* the right tool after all, due to numpy and urllib2
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  • [08:00:23] <KotH> nyt-: gkh :)
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  • [08:00:59] <KotH> jaw22: python is becomming like xml
  • [08:01:55] <jaw22> KotH: what? what do you mean?
  • [08:04:58] <KotH> jaw22: python is getting applied to all kind of problems, even those it has never been designed for
  • [08:05:45] <KotH> jaw22: doing numbercrunching with a scripting language was considered among the most stupid things you could do as a programmer, just 5-6 years ago
  • [08:07:43] <jaw22> python was designed to be general-purpose, for one thing, and 2, modern python implementations are very fast...
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  • [08:08:26] <jaw22> linear algebra is a difficult thing. LAPACK is insane. A high-level solution makes sense, especially for an application where performance isn't critical
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  • [08:10:19] <jaw22> although if I was going to use the Adafruit BBIO library, I would have to use the thrashing of opening and closing files to read the ADC values instead of memory mapping, so that really turns me off
  • [08:11:40] <KotH> linear algebra is easy as long as you stick just to vectors and matrices
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  • [08:12:30] <KotH> and python is a general purpose _scripting_language_
  • [08:12:35] <KotH> the distinction is important
  • [08:12:52] <KotH> and just because people use it for all kind of shit does not mean it's intelligent to use it for all kind of shit
  • [08:16:23] <jaw22> so, what tool do you suggest I use?
  • [08:16:39] <jaw22> for reading the ADC, linear algebra, and http
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  • [08:36:32] <jaw22> KotH?
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  • [08:39:02] <shawnbon206> hai
  • [08:40:19] <Dan1> erm, hi..
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  • [08:52:04] <KotH> jaw22: what does that whole thing do?
  • [08:53:37] <jackmitchell> jaw22: you would use a separate http server for a start, so that is irrelevant; and the "one true language" for the rest if you want performance
  • [08:54:19] <jackmitchell> ah sorry, you mean make http calls, like POSTS and GETS?
  • [08:54:42] <jackmitchell> in which case, still the one true language
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  • [08:59:42] <jaw22> it's to gather entropy, whiten it, and POST it to a remote machine
  • [09:02:41] <KotH> datarate?
  • [09:03:01] <KotH> and you know that sending random data over the network is kind of stupid?
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  • [09:05:27] <LetoThe2nd> if you want true entropy, just use some recorded speech of $POLITICIAN
  • [09:05:52] <jaw22> KotH, why is it stupid?
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  • [09:17:42] <KotH> jaw22: the whole point of random data is to have something that nobody else knows about
  • [09:17:49] <KotH> sending it over the network defeats that purpose
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  • [09:20:56] <shawnbon206> bored~!
  • [09:21:28] <jaw22> .....
  • [09:21:47] <jaw22> I agree with your first statement
  • [09:21:53] <jaw22> however
  • [09:22:03] <jaw22> I am not a moron
  • [09:22:20] <jaw22> and I disagree with your second statement
  • [09:22:49] <av500> you can always encrypt the random data :)
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  • [09:22:52] <jaw22> I plan to use ecsda
  • [09:22:56] <jaw22> ^^ exactly
  • [09:23:48] <av500> use a random key
  • [09:23:52] <jaw22> oops, I mean ecdsa
  • [09:25:29] <jaw22> only problem is, I can't figure out the TSC_ADC FIFOs
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  • [10:06:47] <M2M> any horny girls is there?
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  • [10:11:51] <KotH> av500: danke
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  • [10:33:48] <jaw22> after reading the TRM and https://github.com/VegetableAvenger/BBBIOlib/blob/master/BBBio_lib/BBBiolib_ADCTSC.c#327 I have come to the conclusion that when the ADC FIFO registers are read, they automatically populate with the next ADC readings... that seems like voodoo... is that possible?
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  • [10:42:05] <Bl4cKn0t3> Hi
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  • [10:46:23] <LetoThe2nd> jaw22: a lot of adcs do something like that, so its certainly possible
  • [10:46:39] <LetoThe2nd> jaw22: probably you just should look at the IIO driver for them.
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  • [10:58:40] <Bl4cKn0t3> I'm looking for information about drive servomotors with the beaglebone black in c++, basically I need to know how to use the PWM, Anyone knows any web page of this topic?
  • [10:59:18] <av500> https://www.google.com/search?q=beaglebone+pwm
  • [11:00:17] <LetoThe2nd> isn't there some finished cape for you as a template?
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  • [11:59:11] <jaw22> LetoThe2nd: I don't think you can determine from C when a memory address is read, I think that would have to be built into the chip
  • [12:00:04] <LetoThe2nd> jaw22: read again. i specifically said that the adc does it.
  • [12:00:27] <LetoThe2nd> jaw22: the reference to iio was more meant as an example on how to use it correctly.
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  • [12:01:39] <jaw22> ah, ok
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  • [12:13:09] <BobCat> Don't buy anything from Farnell today, they still haven't patch for heartbleed
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  • [13:40:18] <Tork> Hi, I have a strange problem with my BBB, when I try to use GPIO pins, my BBB become laggy/crash. The heartbeat led become irregular and the command line become very slow. Any idea ? :/
  • [13:40:48] <av500> use how?
  • [13:42:47] <Tork> I make a scheme, 2mn
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  • [13:45:32] <Tork> I do that : http://image.noelshack.com/fichiers/2014/15/1397223885-img.png
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  • [13:48:02] <Tork> I didn't send any command to my BBB it becomes unstable before
  • [13:48:52] <av500> Tork: the power strip lines are all connected no?
  • [13:48:58] <av500> on your breaboard
  • [13:49:00] <av500> bread
  • [13:49:24] <av500> you shorted pin 1 to pin 45
  • [13:49:55] <Tork> Oops, It's a mistake on the scheme, I did'nt do that with my breadboard :p
  • [13:50:29] <mdp> maybe a photo of the real thing...
  • [13:50:56] <KotH> Tork: also, i dont know if the BBB can drive enough current to get your LED to emit anything
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  • [13:51:19] <KotH> Tork: if you need more than 1mA for the led, it's not going to happen. or worst case, you might fry the processor
  • [13:51:49] <Tork> Koth -> Ok, Thx :)
  • [13:52:02] * _chase_ (~a0271661@nat/ti/x-fnlmhughhyxfbbnf) Quit (Remote host closed the connection)
  • [13:52:03] <KotH> Tork: the TRM or datasheet says how much current a GPIO pin can deliver
  • [13:52:07] <KotH> Tork: read it
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  • [13:52:45] <KotH> Tork: oh: and just in case: absolute maximum ratings are exactly that: excede those by even a tiny bit, and your BBB is a brick
  • [13:52:58] <KotH> Tork: never exceed the recomended operating conditions (which are much lower)
  • [13:52:59] <av500> limit is 4ma or so
  • [13:53:00] <Dan> isnt pin 1 and pin 45 both grounds on a BBB?
  • [13:53:06] <av500> low current leds should work
  • [13:53:09] <av500> standard 20mA led, no
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  • [13:54:08] <Dan> on the p9 header
  • [13:54:20] <Dan> or is that pic just wrong?
  • [13:54:44] <Dan> (11:15:11 PM) Tork: I do that : http://image.noelshack.com/fichiers/2014/15/1397223885-img.png <-------
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  • [13:56:21] <yegorich> Hi!
  • [13:56:33] <Tork> I don't understand why in this case it works http://learn.adafruit.com/downloads/pdf/blinking-an-led-with-beaglebone-black.pdf
  • [13:57:04] <yegorich> How can I specify GPIO base number for i2c based IO expander via device tree?
  • [13:57:16] <av500> panto: ^^^
  • [13:57:24] <yegorich> By default the expander gets 496 on am335x
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  • [13:58:07] <panto> you don't
  • [13:58:17] <panto> you use a DT gpio chip reference
  • [13:58:59] <panto> off the top of my head something like: pin = <&i2c-expander 5 0>l
  • [13:59:00] <panto> *;
  • [13:59:00] <KotH> Tork: low current leds
  • [13:59:12] <KotH> Tork: if your led is designed to be drivven by <4mA then it works
  • [13:59:12] <panto> where 5 is the index of the gpio on the expander
  • [13:59:54] <KotH> Tork: but be advises: it's not that the io pins can only delvier 4mA. it's rather that you are not allowed to draw more than 4mA. ie if you draw more than 4mA per pin (and a total maximum which is mentioned somewhere) then you will fry the CPU
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  • [14:00:17] <Tork> Koth oki thx
  • [14:01:13] <yegorich> panto: Documentation/devicetree/bindings/gpio/gpio.txt talks about gpio-ranges, but it looks wired so far
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  • [14:03:26] <panto> what do you mean wired?
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  • [14:05:53] <ioudas> Hi all, I am looking for a raspberry pi replacement. I have several usb power issues with the pi. I was wondering if anyone could steer me to the techincal specs on usb for the beagleboard. How much current/etc it can handle. design specs. etc. Any help would be appreciate.
  • [14:06:07] <jkridner> ioudas: beagleboard.org?
  • [14:06:22] <ioudas> having a hard time finding it on that
  • [14:06:31] * rvraghav93_ (~quassel@117.193.47.222) Quit (Ping timeout: 276 seconds)
  • [14:06:36] <jkridner> or http://beagleboard.org/black and http://eLinux.org/Beagleboard:BeagleBoneBlack
  • [14:07:20] <thurgood> you're better off powering multiple devices with a powered USB hub
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  • [14:10:12] <yegorich> panto: I've read it once more and I think I understand it now. They mean it for SoC's internal GPIO controller, where it makes sense to specify, what GPIO is routed to what pin specified by pinctrl
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  • [14:10:37] <yegorich> panto: trying to get info from Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt
  • [14:10:37] <panto> right
  • [14:10:50] <panto> it's not biggie
  • [14:10:59] <yegorich> panto: which file describes pin = <&i2c-expander 5 0>l?
  • [14:11:11] <panto> err, >l is an error
  • [14:11:16] <panto> it should be >;
  • [14:11:26] <yegorich> panto: I also would like to know, where 496 as base comes from?
  • [14:11:32] <panto> the same one
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  • [14:12:09] <panto> from the implementation of the board
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  • [14:12:12] <panto> is that beaglebone?
  • [14:12:42] <panto> IIRC the SoC GPIOs start numbering from 0, and the others from a high integer
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  • [14:13:05] * ioudas hmmms
  • [14:13:08] <ioudas> cant seem to find it
  • [14:13:28] <yegorich> panto: it is a custom board based on am335x
  • [14:13:37] <yegorich> panto: with tca6416
  • [14:14:03] <panto> the gpio expander when it loads, registers it's own range of gpios
  • [14:14:20] <panto> where those gpios are located is not defined
  • [14:14:35] <panto> there's some kind of allocation logic in gpiolib
  • [14:15:09] <panto> my point is that if you're using DT, you should not care about the global number, only about the index of the gpio in the gpio controller
  • [14:15:17] <yegorich> panto: that's bad. In 3.2 there was something like MAX_GPIO for am335x in the board file and the gpio expnader was assigned MAX_GPIO as base number
  • [14:15:30] <panto> why is it bad?
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  • [14:15:59] <panto> if you make assumption about the gpio # you're getting from gpiolib you're asking for trouble
  • [14:16:03] <panto> *assumptions
  • [14:17:11] <yegorich> do you know https://github.com/jackmitch/libsoc? It has its MAX_GPIO at 256, so with my 496 I hit this at once :-)
  • [14:18:43] <panto> yegorich, I'm not familiar with it, but I know the developer is a reasonable guy
  • [14:18:49] <panto> he's going to accept patches :)
  • [14:19:04] <yegorich> panto: I just would like to have a chance to define an gpio expander in DT and say, that it's base number should follow direct after the referenced GPIO controller, like a linked list
  • [14:19:21] <panto> you don't get to decide
  • [14:19:32] <yegorich> panto: I've already contributed about 3 patches for libsoc
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  • [14:21:13] <mdp> numerical namespace api is a deadend, you should change thinking to using the modern gpiod_* apis
  • [14:21:27] <mdp> and forget about the broken numbering system
  • [14:21:43] <yegorich> mdp: do you have a link?
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  • [14:22:15] <mdp> include/linux/gpio/consumer.h
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  • [14:24:45] <yegorich> mdp: is it suitable for userspace?
  • [14:25:00] <panto> not that I'm aware of
  • [14:25:31] <panto> user-space should not deal with number anyway
  • [14:25:48] <panto> the board should set up symbolic names that correspond to the schematics and then map
  • [14:26:22] <yegorich> panto: symbolic links in /sys/?
  • [14:26:29] <mdp> yegorich, https://www.kernel.org/doc/Documentation/gpio/sysfs.txt
  • [14:26:35] * rvraghav93 (~quassel@117.193.57.54) Quit (Ping timeout: 250 seconds)
  • [14:26:43] <mdp> yegorich, the gpiod_* api can exports to userspace as well
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  • [14:28:43] <mdp> the sysfs api needs your patches to update it to sanity..unique label so you can identify your gpio controller and get rid of the integer nonsense in the node name
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  • [14:31:16] <yegorich> mdp: OK. I understand
  • [14:31:21] * fmotu (~bobb@108.175.206.24) Quit (Ping timeout: 250 seconds)
  • [14:32:11] <mdp> coupled with the descriptor based approach, a sane userspace api would have a unique label per instance of control and integer identifier only matters within that one controller instance namespace
  • [14:32:16] * Tork (52e5f59b@gateway/web/freenode/ip.82.229.245.155) Quit (Ping timeout: 240 seconds)
  • [14:32:42] <mdp> and that unique label is already sitting there in the kernel anyway
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  • [14:34:33] <yegorich> mdp: something like this http://www.spinics.net/lists/devicetree/msg07894.html ?
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  • [14:36:17] <yegorich> mdp: seems like 3.15 still doesn't have this functionality :-(
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  • [14:37:04] <mdp> yegorich, yeah, I was hoping to inspire you ;)
  • [14:37:27] <mdp> yegorich, it will be a huge improvement and remove so many product-specific hacks
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  • [14:38:42] <yegorich> mdp: oh, yes!
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  • [14:45:35] <yegorich> mdp: This was the last patch version (3) https://www.mail-archive.com/linux-gpio@vger.kernel.org/msg00864.html
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  • [14:47:00] <mdp> yegorich, yeah, this was timely cause I was wondering what happened to it last week and forgot to check
  • [14:47:17] <mdp> yegorich, whilst hacking around something here in a similar manner
  • [14:47:31] <mdp> maybe one of us will come up with some time to revive it ;)
  • [14:47:45] <yegorich> mdp: it would be great
  • [14:48:04] <yegorich> mdp: I'll put it on my TODO list
  • [14:48:30] <mdp> how long is that list? I wonder if it's like mine where it's sorta like putting it in the trash ;)
  • [14:48:43] <yegorich> mdp: have to finish some real life projects first :-) As usual :-)
  • [14:48:59] <mdp> same story here
  • [14:49:06] <yegorich> mdp: something like that :-)
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  • [15:15:46] <jaw22> I see a lot of material about sampling the ADC in continuous mode, eg http://beagleboard-gsoc13.blogspot.de/2013/07/sampling-analogue-signals-using-adc-on.html
  • [15:16:30] <jaw22> what's wrong with mmap'ing /sys/bus/iio/devices/iio\:device0/in_voltage0_raw and sampling whenver I like?
  • [15:16:44] <jaw22> whenever*
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  • [15:18:19] <Darietto79> Hi, someone has try to connect BBB with a capacitive touchscreen based on ft5306 controller
  • [15:18:25] <Darietto79> ?
  • [15:19:18] <Darietto79> I have some problem to find a driver for i2c capacitive control
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  • [15:20:22] <nyt-> jaw22: because its one shot sampling mode by default using that interface and limited to about 20k/s on a good day
  • [15:22:35] <jaw22> twenty thousand samples per second? that's plenty for my application
  • [15:23:49] <MLM> Does the BBB require a high speed USB connection? I can't seem to get to work through full speed link. The F: drive pops up but is inaccessible.
  • [15:24:07] <MLM> I know it works when directly connecting it to the PC (aka high speed).
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  • [16:00:38] <cinix> Has anyone run into a problem of running C++ threads on the beaglebone black running angstrom? From reading online I believe it's something to do with linaro toolchain using the wrong pthread library, but I don't know what to do about it.
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  • [16:23:35] <jkridner> cinix: have you tried building natively?
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  • [16:26:58] <cinix> That's the only way I have tried
  • [16:27:17] <matt1113> I just got my beagle bone black and I'm not able to get the GUI to show in chrome/firefox.
  • [16:27:31] <matt1113> any suggestions?
  • [16:27:32] <cinix> I actually just found (sort of) the answer, more of a work around. Adding these compile flags fixes it: -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 -D__GCC_HAVE_SYNC_COMPARE_AND_SHAVE_SYNC_COMPARE_AND_SWAP_4 -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
  • [16:28:24] <cinix> This is where I read about it: https://stackoverflow.com/questions/16171401/why-does-this-simple-c11-threading-example-fail-when-compiled-with-clang-3-2
  • [16:28:31] <matt1113> Nevermind, got it working
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  • [16:32:02] <pdp7> jkridner: hmm you think they will make it? https://www.indiegogo.com/projects/arduino-shield-to-beaglebone-black-cape--2
  • [16:32:21] <jkridner> doesn't look like they will get the funding to me.
  • [16:32:37] <jkridner> I threw a banner up on beagleboard.org today to try to get them a bit more attention...
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  • [16:32:46] <jkridner> I'm not seeing people click on it...
  • [16:33:02] <jkridner> they mostly scroll past directly to the "buy" links.
  • [16:33:09] <pdp7> jkridner: that's a good thing to do... but that's too bad
  • [16:35:14] <jkridner> I think they need to find a distributor to buy enough to pay for the campaign.
  • [16:35:31] <jkridner> pdp7: know of any distributors who'd want a bunch of these?
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  • [16:40:46] * pdp7 looks at the periodic table
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  • [16:45:07] <pdp7> BBB post on hackaday: http://hackaday.com/2014/04/11/beaglebone-black-and-fpga-driven-led-wall/
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  • [16:54:06] <ioudas> Hi all, I am looking for a raspberry pi replacement. I have several usb power issues with the pi. I was wondering if anyone could steer me to the techincal specs on usb for the beagleboard. How much current/etc it can handle. design specs. etc. Any help would be appreciated. I cant seem to find them on the beagle board site.
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  • [17:03:50] <pdp7> ioudas: good queetsion, i'm trying to think of where i've seen that inof
  • [17:03:54] <pdp7> *info
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  • [17:04:54] <pdp7> page 78 of the Tech Ref Manual has a schematic of the USB Host
  • [17:05:09] <pdp7> https://github.com/CircuitCo/BeagleBone-Black/blob/master/BBB_SRM.pdf?raw=true
  • [17:05:36] <pdp7> from http://elinux.org/Beagleboard:BeagleBoneBlack#Hardware_Files
  • [17:06:30] <pdp7> there is a power mgmt chip unlike Pi so it handles power more manua
  • [17:07:11] <ioudas> interesting
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  • [17:07:18] * ioudas looks
  • [17:07:37] <ioudas> yeah, i have a lot of pi issues with usb. we are running a symbol scanner and wifi and the power issues are insane
  • [17:07:50] <pdp7> so USB port VBUS comes from TPS2051 http://www.ti.com/product/tps2051b
  • [17:07:56] <pdp7> yeah, me too
  • [17:08:11] <pdp7> cus there is no power mgmt on pi, its really hit or miss
  • [17:08:27] <ioudas> yeah
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  • [17:08:59] <pdp7> so i'm thinking current for the USB host port is limited by the TPS2051
  • [17:09:01] <ioudas> you post in their forums... you get nailed to the wall for suggesting the usb power issues are real. and banned if you arent bending over.. i want something i know will work
  • [17:09:07] <ioudas> to how much
  • [17:09:09] * ioudas is reading
  • [17:09:24] <pjustice> how are you powering the pi?
  • [17:10:09] <ioudas> i power the pi directly from the wall, tried a 2a and 1a charger. and some phone chargers... same story. devices are powered via a 2a hub
  • [17:10:27] <ioudas> keyboard, wifi and symbol scanner are on hub.. symbol scanner has its own powered wedge
  • [17:11:19] <pdp7> i think you'll find the results are better with open source hardware engineered for a constraint beyond making the cheapest possible computer :)
  • [17:11:43] <ioudas> i would agree. just curious on maximum output
  • [17:12:05] <pdp7> yeah, datasheet for that chip shows 500mA continous
  • [17:12:06] <ioudas> its interesting though, i put a volt meter across the wedge... the thing sucks up 1.78amp. during scanning the delta is 200ma
  • [17:12:12] <pdp7> looks like it can handle spikes
  • [17:12:14] <ioudas> interesting
  • [17:12:23] <pdp7> i'm not 100% sure though
  • [17:12:33] <pdp7> jkridner: do you know max current for the host port?
  • [17:13:01] <pdp7> if not, the beagleboard list is the goto for tech questions usually if IRC doesn't work out
  • [17:13:30] <ioudas> rgr
  • [17:13:34] <pdp7> ioudas: https://groups.google.com/forum/#!categories/beagleboard if you've not seen
  • [17:13:36] <jkridner> There isn't much of a drop from the input
  • [17:14:07] <jkridner> within reason, you should be able to pass on current from the input fairly easily
  • [17:15:26] <pdp7> jkridner: so a device on the host port should be able to pull more than 500mA? Don't know much about the TPS2051, but taking a look at the datasheet
  • [17:15:31] <ioudas> i guess doesnt hurt to order one to test.
  • [17:15:35] <pdp7> :)
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  • [17:15:54] <ioudas> i have all the other devices. see if it works.
  • [17:16:05] <ioudas> but the scanner wedge portion blows my mind in terms of amperage.
  • [17:16:21] <ioudas> im waiting on another meter to confirm
  • [17:16:21] <pdp7> ya, that's a lot to source from the USB port
  • [17:16:39] <ioudas> the meter i tested with... makes me think it may be wrong
  • [17:16:49] <pdp7> there are those Y adapter cables to combine current from multiple ports
  • [17:17:19] <pdp7> like 500mA + 500mA to get 1A
  • [17:17:25] <jkridner> pdp7: yes, that's my understanding from Gerald, when powered through the barrel.
  • [17:17:32] <pdp7> jkridner: cool, thanks
  • [17:19:20] <ioudas> the devices are a normal 100ma keyboard (dell 5 dollar special) an atheros card (netgear n150) and this symbol scanner adapter. http://barcodescannersdiscount.com/noname4.html and a ls 4004i scanner. (power wedge for scanner is dc 5v 1amp) which i have in place.
  • [17:19:31] <ioudas> so i think 500 vs a 140 on the pi
  • [17:19:35] <ioudas> will be interesting to test
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  • [17:19:56] <ioudas> im actually building a wyse 60 terminal.... the code is done, the only stuff we have problems with is the pi.
  • [17:21:16] <pdp7> wyse 60 terminal... like this is for point of sale?
  • [17:21:37] <ioudas> yea, kind of. for a company
  • [17:21:53] <ioudas> the code works beatifully. everything works.. except the pi just locks up during use
  • [17:22:01] <ioudas> you can remove a wifi... bam locks up
  • [17:22:04] <ioudas> etc.
  • [17:22:09] <ioudas> dvi resets.
  • [17:22:57] * cndiv (~cndiv@wikimedia/cdeubner) Quit (Ping timeout: 250 seconds)
  • [17:23:02] <pdp7> that's an interesting application, i like to see SBCs like the BBB being used in commercial/industrial applications to replace old computer equipment
  • [17:23:14] <pdp7> hopefully you'll have better luck with BBB
  • [17:23:41] <pdp7> i can say that i did many projects with Pi and BBB, and I've never had power issues with BBB unlike Pi
  • [17:23:54] <pdp7> or USB issues
  • [17:24:16] <pdp7> this is my favorite powered hub for any system
  • [17:24:17] <pdp7> http://www.adafruit.com/products/961
  • [17:25:58] <pdp7> http://upload.wikimedia.org/wikipedia/en/thumb/8/8b/NoPC_Wyse.png/150px-NoPC_Wyse.png
  • [17:26:06] <pdp7> The "no-PC" logo used by Wyse to promote thin clients[17]
  • [17:26:12] <ioudas> i actually use that hub
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  • [17:26:21] <pdp7> hey, single board computers like BBB are making that dream a reality now :)
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  • [17:26:30] <pdp7> ioudas: ah, cool
  • [17:26:30] <ioudas> the code is written in c
  • [17:26:35] <ioudas> it can compile on anything really
  • [17:26:42] <pdp7> that's good
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  • [17:27:11] <PaulRainey> Hi, I was wondering if anyone could tell me if Beagleboard Rev D works with simulink?
  • [17:27:12] <ioudas> what i did was stick a pi in a http://www.hubbell-wiegmann.com/ nema rated junction box
  • [17:27:32] <pdp7> ah ok
  • [17:27:33] <ioudas> put the stuff in there to hold down wires.... and hooked up a monitor
  • [17:27:52] <ioudas> its really slick... literally you cant buy the wyse terminals... the company i work for has a aix cobol back end
  • [17:28:00] <ioudas> they use the wyse emulation for screens to load product
  • [17:28:12] <ioudas> and do inventory type things... we are going to roll out 60 units
  • [17:28:19] <ioudas> brb, going to buy a real multimeter
  • [17:28:39] <pdp7> hah, my company also has an old IBM backend behind all the modern web stuff
  • [17:29:12] <pdp7> ioudas: very interesting use case for bbb... kinda like replacing old PCs running CNC machines
  • [17:30:00] <pdp7> PaulRainey: sorry, i've not used simulink... hopefully other here have
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  • [17:42:04] <MLM> How do I enable the built-in remote desktop in Ubuntu from ssh? http://www.makeuseof.com/tag/ubuntu-remote-desktop-builtin-vnc-compatible-dead-easy/ - Everything I am finding is people wanting to install 3rd party solutions.
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  • [17:45:16] <ds2> stop using those non compliant USB devices
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  • [19:07:34] <ioudas> pdp7, got some new news on that pi.
  • [19:07:38] <ioudas> you around
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  • [19:13:20] <pdp7> ioudas: howdy, whats the news
  • [19:13:44] * kuldeepdhaka (~kuldeepdh@unaffiliated/kuldeepdhaka) Quit (Ping timeout: 258 seconds)
  • [19:14:55] <ioudas> the pi's with a wna n 150 netgear will freeze upon ap disconnection or removal entirely. similar cards will not produce a freeze of the os. Did manage to measure voltage across its main. was lower than i wanted, but problem occours with a 2amp 5v charger. The n150 netgear just will instantly freeze all io.
  • [19:15:22] * honschu_ (~honschu@shackspace/j4fun) Quit (Quit: leaving)
  • [19:15:23] <pdp7> ah
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  • [19:15:42] <ioudas> no kern log, not able to dmesg or see anything on console. just bam froze
  • [19:15:55] <pdp7> interesting, with the pi, there is tp1 and tp2 test points that show the 5v rail... i would often see that being below 4.75V when having trouble
  • [19:16:01] <pdp7> ah dang
  • [19:16:06] <pdp7> that's a tough one
  • [19:16:09] <ioudas> yeah
  • [19:16:33] <ioudas> with the 2.1 amp charger the tp1 and tp2 run at 4.95. disconnection of wifi will cause a .001 delta in voltage.
  • [19:16:40] <pdp7> i do know that the IP block for the USB OTG on the Pi's processor (BCM2835) is not that great
  • [19:16:56] <pdp7> i think it is source of lot of finicky behavior
  • [19:17:24] <pdp7> of course, kinda of what happens when using a media accelerator chip as a general purpose GNU/Linux computer
  • [19:17:58] <ioudas> i think if i did a bbb a lot of these power/odd issues may just vanish.
  • [19:18:05] <ioudas> i will most likely have the company order one
  • [19:18:16] <pdp7> great
  • [19:18:27] <ioudas> so we will see
  • [19:18:48] <ioudas> problem is, the other cards, do a deauth reason code 3 with the ap's compared to my atheros wna card.
  • [19:18:54] <ioudas> then wont rejoin
  • [19:18:54] <pdp7> super, it can be a bit tough to find in stock... the beagleboard mailing list has a good pulse on the situation
  • [19:18:57] <ioudas> until reboot
  • [19:19:38] <pdp7> ah, so the ones that don't freeze the pi end up being disconnected, eh?
  • [19:19:50] <pdp7> that's no fun
  • [19:20:02] <ioudas> teah
  • [19:20:03] <ioudas> yeah*
  • [19:20:21] <pdp7> re: order, for today, specialcomp has in stock: http://specialcomp.com/beaglebone/
  • [19:21:06] <pdp7> Adafruit gets weekly shipment, 1 per customer, so sign up to be notified: https://www.adafruit.com/products/1278
  • [19:21:25] <ioudas> rgr
  • [19:21:28] <ioudas> thank you
  • [19:21:30] <pdp7> Newark element14: http://www.newark.com/element14/bbone-black/dev-board-am3358-mpu/dp/41X3868?ost=bbone+black+embest
  • [19:21:37] <pdp7> (an authorized clone)
  • [19:21:42] <pdp7> sure, np
  • [19:22:01] <ioudas> is there a limitation for these in commercial settings such as business uses
  • [19:22:04] <ioudas> point of sale
  • [19:22:09] <ioudas> your first like said non commercial use
  • [19:22:20] <pdp7> no, it just won't be supported
  • [19:22:57] <pdp7> you can engage with the manufacturers, CircuitCo or element14/embest, directly for commerical arrangments
  • [19:23:03] <ioudas> ah
  • [19:23:10] <ioudas> gotcha
  • [19:23:18] * mhaberler (~mhaberler@intern-210.stiwoll.mah.priv.at) Quit (Ping timeout: 252 seconds)
  • [19:23:41] <pdp7> its basically gerald who does the HW for BBB doesn't want to get back 100 devices RMA'd cus they were in some companies product and failed
  • [19:24:19] <pdp7> also, one reason for stock shortage is that companies embedding in products have been sucking up stock from distributors
  • [19:24:33] <pdp7> small scale: buy where ever
  • [19:24:47] <pdp7> large scale: engage with CircutiCo, or now also, element14
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  • [19:25:25] <pdp7> bbiab, lunchtime! \o/
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  • [20:50:09] <MLM> Is the default desktop sharing Vino server in the BBB Ubuntu image? (http://youtu.be/f9F3EE2jCPo?t=34s) - Is there a way to enable it from a ssh terminal? I don't have a mini hdmi to hdmi adapter at the moment so I can't check the GUI like in the video
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  • [21:21:49] <dsmith-work> Greetings. Anyone know anything about these Element14 built beaglebone blacks?
  • [21:22:14] <dsmith-work> Should I wait for a "real" one instead?
  • [21:22:42] <MLM> It seems that they are only guranteed for the first party stuff. Angstrom.
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  • [22:19:41] <jaw22> does anybody have completed beagle projects they'd like to demo?
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  • [22:35:22] <pdp7> jaw22: demo online?
  • [22:36:11] <pdp7> dsmith-work: i have an element14/embest bbb (bought from newark element14 in USA)
  • [22:36:37] <pdp7> dsmith-work: it is same functionality as CircuitCo BBB rev B (the most recent Rev)
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  • [22:36:57] <pdp7> dsmith-work: all software works the same on it
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  • [22:38:44] <pdp7> dsmith-work: my gallery if you're interested https://plus.google.com/photos/117542001281850354871/albums/6000002045485150529?banner=pwa
  • [22:40:12] <dsmith-work> pdp7: Cool, thanks.
  • [22:41:12] <pdp7> any created a project page on beagleboard.org?
  • [22:41:17] <pdp7> I added this beagleboard.org/project/bbb-bicolor-matrix
  • [22:41:20] <pdp7> errr
  • [22:41:24] <pdp7> http://beagleboard.org/project/bbb-bicolor-matrix
  • [22:41:36] <pdp7> but would like to upload images, not sure if it supports hosted media
  • [22:41:51] <pdp7> like wordpress or wikimedia would
  • [22:42:28] <pdp7> it does let you upload 1 image as the thumbnail
  • [22:46:17] <jaw22> yeah demo online
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  • [22:49:47] <pdp7> jaw22: like g+ hangout?
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  • [23:02:24] <dogrocket> is there a reason one would use debian armel over armhf?
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  • [23:06:39] <pdp7> dogrocket: i thought there was some java issue
  • [23:07:37] <jg_> Hello, I had a quick question about the latest images (debian for the BB/B). I upgraded and I noticed I can't connect to the bone via usb/ethernet. Has the address changed?
  • [23:07:50] <dogrocket> ok... well i need armhf :/
  • [23:09:16] <pdp7> dogrocket: ya, i can't think of a reason actually... there was some historical issue with images avail for pi but that got nothing to do with beagle
  • [23:09:31] <pdp7> i think armhf was always the leader for Java in general on ARM
  • [23:10:26] <pdp7> jg_: is it this one? http://debian.beagleboard.org/images/bone-debian-7.4-2014-03-27-2gb.img.xz
  • [23:10:36] <jg_> Yes
  • [23:11:11] <pdp7> I've not seen anything about address changing... i believe i have the 3-27 at home on bbb but would need to double check
  • [23:11:19] <pdp7> usb should be 192.168.7.2
  • [23:11:34] <pdp7> ethernet should be set to dhcp, so whatever your local network does
  • [23:11:42] <jg_> I have both a white and black, the white is running the new debian image but black is on angstrom still
  • [23:12:17] <jg_> I'm using 192.168.7.2, works with angstrom but not on the white (debian)
  • [23:12:17] <pdp7> ah, gotcha, interesting... been awhile since i've used white. i think it has a usb to serial adapter so you can get the serial console easily
  • [23:13:02] <pdp7> have you used the serial port over USB before?
  • [23:13:11] <jg_> I have
  • [23:13:13] <pdp7> it would be easy way to see output of ifconfig
  • [23:13:39] <pdp7> iirc, white had that built in versus needing an ftdi cable on black
  • [23:13:48] <jg_> I was just seeing how the usb/ethernet works, normally I'm powered with a ethernet
  • [23:13:53] <pdp7> ah
  • [23:13:59] <jg_> oh good point!
  • [23:14:22] <jg_> I'll try that, if I can't get it working I'll flash my BBB with debian to compare
  • [23:14:28] <pdp7> i think i'll have to try my white this weekend... its kinda been sad lately
  • [23:14:49] <pdp7> but i was thinking about how the new debian beagleboard.org image would run ok for both
  • [23:14:59] <pdp7> well the non-emmc flasher, that is
  • [23:15:00] <jg_> same here, that's I forced myself to use it with debian... it's been sitting around collecting too much dust :D
  • [23:15:22] <jg_> other than the usb/ethernet it's running great!
  • [23:15:28] <jg_> I'm glad the switch was made
  • [23:15:59] <pdp7> cool... i could see that maybe being something not many folks have tested... bbw with debian 3-27 beagleboard.org
  • [23:16:07] <pdp7> ya!
  • [23:16:10] <jg_> well, I'm off for now. I'll report back later when I've played around a bit
  • [23:16:26] <pdp7> me too... it was this weird bizzaro land for me without apt-get or yum :)
  • [23:16:38] <pdp7> cool, cya
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  • [23:43:22] <mrpackethead> i need to go and buy a door
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