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  • [04:26:56] <chrisw95x> Hi, I have BBB, and I'm getting a machine type mismatch from u-boot and kernel. U-boot is 2013.04-rc1-14237-g90639fe-dirty and passing type
  • [04:27:08] <chrisw95x> 0x00000E05.
  • [04:27:53] <chrisw95x> Kernel is 3.8.13, and seems to be expecting 0000060a, I guess?
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  • [04:28:25] <chrisw95x> Seems funny that this uboot and uImage seem to boot ok from sdcard, but not when I tftpboot the same kernel.
  • [04:28:58] <chrisw95x> I guess that is device tree related?
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  • [04:49:39] <chrisw95x> ah, ok. I figured it out.
  • [04:50:03] <chrisw95x> This helped explain it: http://www.informit.com/articles/article.aspx?p=1647051&seqNum=5
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  • [05:47:35] <sahish> how to start programming beaglebone black unsing "C". please guide me to start..
  • [05:48:26] <_av500_> google
  • [05:49:15] <sahish> i have searched a lot. but i didnt know which to use..
  • [05:52:52] <sahish> i need the correct procedure to access the pins.. help me..
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  • [06:16:03] <Buddy_> hey guys, do you think you could help me with my bootscript file?
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  • [06:40:24] <saravan> is it must to modify the device tree for working with GPIOs in beaglebone black??
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  • [06:46:24] <saravan> anyone help me..
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  • [06:55:27] <av500> no
  • [06:55:38] <av500> some GPIOs are already set up for you
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  • [07:20:49] * somesome1hing cracks sha256
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  • [08:48:25] <saravan> anyone guide me, how to start programing beaglebone black?
  • [08:49:52] * mythos (~mythos@unaffiliated/mythos) Quit (Ping timeout: 246 seconds)
  • [08:51:20] <KotH> saravan: the same as you would program on a PC based linux system
  • [08:53:30] <saravan> is there any guide. i'm new to beaglebone..
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  • [08:54:32] <KotH> look for guides on programming on linux
  • [08:54:38] <KotH> not on beaglebone
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  • [09:30:03] <rob_w> which is the mode number on pinctrl when i want it to be mode 7 and INPUT_PULLDOWN ?
  • [09:30:26] <rob_w> 0x37 should be input pullup mode 7
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  • [11:16:28] <cityLights> is anyone here using gentoo? I seek a slim OS with no graphics
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  • [12:23:59] <Rotti> hi!
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  • [12:24:50] <exosyst> I've taken a working NFS rootFS and tried writing it to the eMMC but I can't seem to get a serial console to come up... am i missing something?
  • [12:24:53] <Rotti> is it possible to use network sockets from kernel space? need to receive ip multicast messages...
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  • [12:26:09] <KotH> Rotti: yes, you can, but you dont want to
  • [12:26:25] <KotH> Rotti: what do you want to do?
  • [12:26:47] <KotH> exosyst: probably wrong kernel boot parameters
  • [12:27:17] <KotH> exosyst: unless you dont even get the bootloader, then it's most probably borked serial port settings, or you overwrote the bootloader too
  • [12:27:54] <Rotti> KotH: i'm trying to send a signal to multiple boards. a gpio could be enough but may require more infrastructure... i want this signal to be received at the "same time"
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  • [12:28:26] <KotH> Rotti: so you want to control multiple boards using a specific signal?
  • [12:28:52] <KotH> Rotti: what shall happen on the receiving boards?
  • [12:29:01] <KotH> Rotti: who or what triggers the "signal"?
  • [12:29:38] <Rotti> that's the question... it could be another board... sending either a multicast packet or just setting a gpio
  • [12:32:14] <KotH> ok. lets go one step back. what is your end goal? what do you want to acheive?
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  • [12:34:13] <Rotti> KotH: some kind of timesync w/o ntp
  • [12:36:10] <KotH> Rotti: can you tell more
  • [12:36:27] <KotH> i cannot give you hints how to procede w/o knowing what you want to do
  • [12:37:59] <av500> [13:34] <Rotti> KotH: some kind of timesync w/o ntp
  • [12:38:12] <Rotti> KotH: yepp... well, i just want to find out what can be handled/detected with less overhead/faster from the kernel space: a changed gpio or a received network packet
  • [12:38:29] <av500> well, gpio is faster of course
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  • [12:40:50] <Rotti> thought so... but i'd like to show it, av500...
  • [12:41:56] <av500> ?
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  • [12:43:23] <exosyst> KotH, I'll have a revisit cheers
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  • [12:45:47] <Rotti> av500: i wrote a small module which 'copies' the value of one gpio to another using an interrupt handler... this time can be measured with a logic analyzer.... for comparison, i'd like to do the same with network packets (i.e. not copy a pin but set the gpio accordingly)
  • [12:49:16] <KotH> Rotti: well.. if you want to sync to a couple of us, then a userspace application using udp packets is enough
  • [12:49:22] <KotH> Rotti: and fearly easy to do
  • [12:49:25] <KotH> fairly*
  • [12:49:35] <KotH> Rotti: if you need better than that, you should go the GPIO way
  • [12:50:34] <KotH> Rotti: with a GPIO pin and an IRQ you get somewhere into the ~100ns range
  • [12:50:53] <KotH> Rotti: with GPIO and capture/compare you get somewhere in the <20ns range
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  • [12:51:20] <KotH> Rotti: at this point you want to take care of the rise/fall time of your signal and cable length ;)
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  • [12:52:52] <Rotti> KotH: gpio and kernel was much better than udp in userspace... but it still was a few us... capture/compare could be interesting ;)
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  • [12:53:31] <KotH> Rotti: well, upd packet is mostly dominated by network delay, and that has a jitter of 10-200us
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  • [12:54:53] <R2E4_> Good morning
  • [12:55:24] <KotH> good afternoon
  • [12:55:41] <Rotti> KotH: thanks... so i'll just use gpio ;)
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  • [12:56:25] <R2E4_> I'm having trouble getting gpio working.
  • [12:56:38] <KotH> Rotti: what is the use case of your device/sync tool?
  • [12:56:52] <R2E4_> Actually the gpio is working but I cannot get it to fire a transistor.
  • [12:57:36] <R2E4_> Using P2222A, by itself, i cannot get output and put two together for a darlington, it dont work either.
  • [12:57:49] <KotH> R2E4_: show us your circuit
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  • [12:58:46] <R2E4_> gpio > 10K emitter to ground collector to load
  • [12:59:14] <KotH> R2E4_: you have a 10k resistor between gpio and base of the 2n2222?
  • [12:59:18] <R2E4_> gpio > 10K to base emitter to ground collector to loa
  • [12:59:27] <R2E4_> yes
  • [12:59:33] <KotH> how big is your load?
  • [12:59:47] <R2E4_> just a small relay
  • [12:59:53] <KotH> how many mA?
  • [13:00:07] <R2E4_> 100ma
  • [13:00:12] <KotH> well...
  • [13:00:20] <KotH> your base resistor is too high
  • [13:00:33] <KotH> the 2n2222 has a beta of 100 if i'm not mistaken
  • [13:00:44] <KotH> ie, you need a base current of at least 1mA
  • [13:00:53] <KotH> you cannot get that current with 10k and 3V
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  • [13:02:14] <KotH> also make sure you havent forgotten the free-wheel diode for the relay, otherwise you'll fry the 2n2222 ;)
  • [13:02:18] <Rotti> KotH: no real use case yet... i want to see how accurate clocks can be synced in a distributed system and if it is possible to use something like this for some delay measurements etc...
  • [13:02:45] <KotH> Rotti: 1ns is "easy" to acheive
  • [13:02:52] <R2E4_> 300 ohms?
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  • [13:03:34] <KotH> Rotti: but, when you go below 100ns you have to take care of a lot of things, otherwise the disturbances will be bigger than what the boards can do
  • [13:03:53] <KotH> R2E4_: <3k
  • [13:04:02] <KotH> R2E4_: i'd use 1k, then you have a factor of 3
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  • [13:04:09] <KotH> R2E4_: but check the beta of the 2n2222 first
  • [13:04:30] <R2E4_> its 50ma
  • [13:04:41] <R2E4_> oh no, 1
  • [13:04:45] <Rotti> KotH: i guess ~anything <1us is good enough for now...
  • [13:04:47] <KotH> beta is just a number, not a current ;)
  • [13:05:38] <KotH> R2E4_: beta is often labled as h_fe in datasheets
  • [13:05:58] <R2E4_> http://www.fairchildsemi.com/ds/PN/PN2222.pdf no ref to it
  • [13:06:37] <R2E4_> 300 max
  • [13:07:37] <KotH> R2E4_: get yourself a copy of http://www.amazon.de/Halbleiter-Schaltungstechnik-Ulrich-Tietze/dp/3642310257/r
  • [13:07:40] <KotH> R2E4_: get yourself a copy of http://www.amazon.de/Halbleiter-Schaltungstechnik-Ulrich-Tietze/dp/3642310257/
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  • [13:08:08] <R2E4_> Do I need to learn german first?
  • [13:08:11] <KotH> yes
  • [13:09:38] <KotH> well, you can also buy the english edition, but it's based on a 10y old german edition
  • [13:10:09] * das remembers when he saw the book for 30 euros and didn't buy it ...
  • [13:10:14] <KotH> although the transistor circuits didnt change much, the sections were heavily expanded in the newer german editions
  • [13:10:30] <R2E4_> I just want to send ground through the NPN and directly to a relay, and 12v on the other side of relay. THis is not rocket science.
  • [13:10:40] <KotH> das: the german edition cost not even half the price.. for a new book
  • [13:10:53] <KotH> das: used ones are usually 30 euro or so
  • [13:11:11] <KotH> R2E4_: yes, it's not
  • [13:11:12] <das> KotH: T&S ? last time I checked it was >100E new ?
  • [13:11:19] <KotH> R2E4_: but there are still 100s of ways to do it wrong
  • [13:11:20] <KotH> :)
  • [13:11:37] <KotH> R2E4_: as i said, decrease the base resistor, add a free wheel diode to the relay and you are done
  • [13:11:59] <KotH> das: i got it for 120CHF or so.. about a year ago
  • [13:12:31] <das> dat 1.20 rule :)
  • [13:12:37] <KotH> R2E4_: oh.. and make sure the 2n2222 gets enough cooling. 100mA is a considerable current
  • [13:12:59] <KotH> das: chf, the only stable currency in europe ;)
  • [13:14:11] <das> well it's "indexed" on the euro
  • [13:14:30] <KotH> because it was too stable ^^'
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  • [13:15:03] <das> that's the reason ?
  • [13:15:10] <das> hum I'll read up on that
  • [13:15:37] <KotH> das: yes, chf skyrocketed relative to eur, which had a huge imapact on the largely export based economy of ch
  • [13:15:57] <KotH> das: thus they had to devaluate chf in order for the swiss economy to remain stable
  • [13:16:53] <das> I fail to see how it makes the chf stable
  • [13:17:23] <KotH> people were buying chf because it was more stable than eur
  • [13:17:33] <KotH> that increased the price of chf relative to eur
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  • [13:18:11] <das> well by buying a currency you increase the pool of money in this currency thus increasing its value
  • [13:18:27] <das> so that means that people trusted the chf so much that it became unstable
  • [13:18:33] <das> relative to other currencies
  • [13:18:47] <das> since I doubt most chf were bought in eur
  • [13:19:14] <KotH> for that, you have to ask someone who knows more than i do about forex
  • [13:19:19] * jkridner (~jkridner@pdpc/supporter/active/jkridner) Quit (Ping timeout: 250 seconds)
  • [13:19:22] <R2E4_> drpooed the resistor to 1K and it still not working.
  • [13:19:56] <KotH> R2E4_: ok.. what do you measure?
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  • [13:20:08] <das> KotH: I think we (I?) confuse stability of the currency itself and stability of the state that backs up the money :)
  • [13:20:21] <KotH> das: heh.. could be :)
  • [13:20:30] <Crofton|work> bitcoins ftw
  • [13:20:47] <KotH> Crofton|work: i thought you use usrp's as currency? :)
  • [13:20:54] <Crofton|work> :)
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  • [13:26:18] <R2E4_> IT is showing 1.2volts instead of 12vdc. Not enough current?
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  • [13:33:45] <KotH> R2E4_: IT?
  • [13:33:49] <KotH> R2E4_: what are you measuring?
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  • [13:38:58] <R2E4_> ground on the collector and 5 volts
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  • [14:37:58] <vicash> hi, i am trying to boot a BBB from the micro-SD card and all I get is the letter C printed a few times a second when I view the boot process using a UART. I verified the write of the OS on the SD card and it looks alright. how do I fix this ?
  • [14:43:29] * vvu|Log is now known as vvu|Log_away
  • [14:46:38] <av500> fix the card
  • [14:46:51] <av500> also, hold the boot button at power up
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  • [15:08:09] <JuriadoBalzac> heyo
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  • [15:22:58] <vicash> av500: when you say fix the card you mean re-install the OS on the card or use a new card ?
  • [15:23:22] <vicash> av500: i tried pressing the Boot button and then restarting the BBB but that didn't change anything.
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  • [15:26:45] <av500> it will boot from a properly prepared card
  • [15:26:51] <av500> it does so for many people
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  • [15:29:51] <bpetersen> If the BeagleBone is powered via the 5V Power supply and the computer is disconnected will the USB Mini Receptacle have power?
  • [15:30:07] <bpetersen> The USB Mini Receptacle located on BeagleBone
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  • [15:32:13] <av500> no
  • [15:32:19] <av500> there are diodes
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  • [15:46:41] <vmayoral> has anybody some experience creating a BBB web server with a simple web interface? PyBBIO (https://github.com/alexanderhiam/PyBBIO) seems quite straightforward, suggestions? comments?
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  • [15:51:48] <bpetersen> vmayoral
  • [15:51:56] <bpetersen> did you ask a question about the web server?
  • [15:52:00] <vmayoral> yes
  • [15:53:05] <bpetersen> I used python as a webserver
  • [15:53:05] <bpetersen> for one of my projects
  • [15:53:16] <vmayoral> did you use the PyBBIO?
  • [15:53:20] <vmayoral> library*
  • [15:53:40] <bpetersen> Not for this project
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  • [15:53:56] <bpetersen> http://docs.python.org/2/library/simplehttpserver.html
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  • [15:54:25] <vmayoral> i see that's also another way, any recommendations for starting a new project?
  • [15:54:58] <vmayoral> i mean, since you've used both
  • [15:55:10] <bpetersen> I use both
  • [15:55:19] <bpetersen> PyBBIO mainly for simple GPIO stuff
  • [15:55:45] <vmayoral> In my application i honestly don't need much, i get the data from UART and I2C
  • [15:56:00] <vmayoral> so i just want to display it and let others display it with their devices
  • [15:56:41] <agmlego> Since PyBBIO does not have a webserver built in, it would be hard to use for that purpose.
  • [15:57:33] <bpetersen> If it were up to me, I would use Python webserver just because it is very basic; and if you need it to be complex you can
  • [15:58:32] <vmayoral> ok, i thought PyBBIO had a web server built in
  • [15:58:36] <vmayoral> my mistake then
  • [15:58:40] <bpetersen> I've never used PyBBIO webserver
  • [15:58:47] <bpetersen> I think it has one. I just never used it
  • [15:58:50] <vmayoral> thanks for the feedback :)
  • [15:59:01] <vmayoral> i think i'll give a try your way bpetersen
  • [15:59:18] <vmayoral> thanks to both!
  • [15:59:22] <bpetersen> awesome!
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  • [16:00:09] <agmlego> Balls, it does.
  • [16:00:24] <agmlego> Why the hell does a GPIO library have a webserver in it?
  • [16:01:54] <thews> restfulness ?
  • [16:02:18] <agmlego> I have no idea what you think that means.
  • [16:02:33] <jackmitchell> web2.0 all the things?
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  • [16:03:30] <R2E4_> BBIOServer
  • [16:03:31] <thews> separate threading, separate app, able to keep it live and active and interface via REST
  • [16:03:33] <agmlego> I am just saying, there are perfectly servicable Python web server modules. Why add one to a module that should have nothing to do with that?
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  • [16:04:10] <thews> you should be able to understand the usefulness of that if you have much experience
  • [16:04:25] <agmlego> This would be like, "Hey, here is a blender. It blends stuff. But, if you want, it is also a motorcycle."
  • [16:04:45] <thews> that makes no sense
  • [16:05:00] <agmlego> thews: Right, but there is no reason for the *module* to have the built in. It is the programmer's job to use the modules s/he needs to make the application s/he wants.
  • [16:05:18] <thews> agmlego: if it can be enabled/disabled it's quite useful
  • [16:05:23] <thews> don't have to reprogram it yourself
  • [16:05:36] <thews> also it allows test cases to be built and give people examples
  • [16:05:45] <agmlego> When I want to use gpio, I use a gpio module. When I want to add a web server to the rpogram, I use a web server module in addition to the gpio module. Having them the same module is just messy and poor practice.
  • [16:05:46] <thews> and make sure it works properly with each build
  • [16:06:12] <agmlego> But then again, this is the open sores community. :-/
  • [16:06:31] <thews> sure.
  • [16:06:52] <agmlego> Poor practices are unfortunately part of the territory.
  • [16:06:55] <thews> something tells me you don't understand test frameworks either
  • [16:07:14] <agmlego> thews: Something tells me you do not understand the complaint I am making.
  • [16:07:42] <thews> agmlego: I understand it, but it shows lack of experience
  • [16:08:14] <agmlego> thews: ...yeah, no it does not.
  • [16:08:25] <thews> sure.
  • [16:08:37] <agmlego> One purpose per module, one module per purpose.
  • [16:08:44] <agmlego> THis is standard programming practice.
  • [16:09:11] <thews> and what proprietary library do you use that adheres to this?
  • [16:09:12] <agmlego> It is all well and good to have a framework of multiple modules. Last I checked, though, PyBBIO is a single module.
  • [16:09:31] <agmlego> thews: Every one I have ever touched, or written, excpet apparently PyBBIO.
  • [16:10:05] <thews> who uses your "modules" ?
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  • [16:10:25] <agmlego> Everyone on my team.
  • [16:10:37] <thews> I'm sure you think this is useless too http://electricimp.com/
  • [16:10:48] <agmlego> Also, if I may ask, how much experience with Python do you have, thews?
  • [16:11:01] <agmlego> thews: I have no opinion on the Imp.
  • [16:11:24] <thews> python? about 10-12 years
  • [16:11:40] <mdp> easy to deploy gpioasaservice.com
  • [16:11:53] <thews> mdp: absolutely
  • [16:11:59] <thews> same as the electric imp
  • [16:12:03] <thews> it's quite valuable
  • [16:12:06] <agmlego> mdp: Just as easy to bolt on a dedicated web server module and do it the right way.
  • [16:12:07] <mdp> everything is justifiable in python-land
  • [16:12:13] <agmlego> No it really is not.
  • [16:12:21] <thews> agmlego: not just as easy
  • [16:12:28] <mdp> so make a sane module
  • [16:12:31] <agmlego> Sure it is.
  • [16:12:31] <georgem> heh
  • [16:12:33] <mdp> "you have the source"
  • [16:12:37] <mdp> fuck it and go
  • [16:12:42] <agmlego> mdp: Or I can bitch about it in IRC.
  • [16:12:42] <thews> he doesn't like open sores
  • [16:12:50] <agmlego> I thought that was what this channel was for. ;-P
  • [16:13:02] <thews> he will make his own and not use the experience and evolution of others
  • [16:13:10] <mdp> this channel is for vague unanswerable questions that are never asked
  • [16:14:10] <agmlego> thews: Who said that? My dig at the open source community is with the frequent value judgement prioritising speed and release over quality or planning.
  • [16:14:34] <thews> agmlego: sounds like you utilize bad opensource projects
  • [16:14:45] <agmlego> ...like PyBBIO, yeah.
  • [16:14:46] <agmlego> ;-P
  • [16:15:20] <georgem> agmlego: I often find the opposite. I think it depends what scale of project you're dealing with
  • [16:15:25] <thews> many have timelines, features, test cases to guarantee reliability, many use code coverage, many use best practices checkers, all built in, some use on the fly testing like Guard
  • [16:15:26] * LordDVG (~LordDVG@unaffiliated/lorddvg) Quit (Remote host closed the connection)
  • [16:15:46] <mdp> agmlego, it does what the author wants..deal with it
  • [16:16:12] <agmlego> thews: Many do, many also do not.
  • [16:16:24] <agmlego> mdp: I am, by bitching about it in IRC.
  • [16:16:40] <agmlego> mdp: THis is how people on the Internet deal with things. Deal with it.
  • [16:16:41] <agmlego> ;-P
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  • [16:17:05] <mdp> agmlego, be sure to post a rant on g+ too
  • [16:17:55] <agmlego> Yeah, I probably ought to do that.
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  • [16:19:01] <mdp> if the author is on there and you include an ad hominem attack that should go a long way to addressing the issue
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  • [16:19:23] <agmlego> Yeah, and I can probably build a strawman for the purpose too.
  • [16:19:36] <agmlego> I think I still have a partial bale out back.
  • [16:19:42] <mdp> or...just switch to libsoc
  • [16:19:52] <agmlego> Heh.
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  • [16:20:55] <mdp> the advice is all free and you get what you pay for
  • [16:20:56] <georgem> And SKOLD vs. KMFDM - Bloodsport comes up in my random play list. How appropriate.
  • [16:21:10] <agmlego> Honestly though, I may well be writing my own Python gpio module soon anyway, because as far as I have found, all of the Python ones only talk through sysfs which is too slow for much of what i want to do.
  • [16:21:29] <mdp> agmlego, hackaday has a perfect post for you then ;)
  • [16:21:35] * florian (~fuchs@Maemo/community/contributor/florian) Quit (Remote host closed the connection)
  • [16:21:35] <jackmitchell> I think you mean writing a kernel module then?
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  • [16:21:47] <agmlego> mdp: I literally loaded that page about three minutes ago.
  • [16:21:54] <crissae> sup
  • [16:21:59] <crissae> I don't know anything about the beagleboard
  • [16:22:10] <agmlego> jackmitchell: A kernel module with a Python userspace wrapper, yes.
  • [16:22:14] <mdp> jackmitchell, no way, he wants to open /dev/mem and bang away ;)
  • [16:22:15] <thews> kernel gpio subsystem is fast, sysfs isn't too slow though
  • [16:22:28] <agmlego> thews: kHz is slow.
  • [16:22:35] <agmlego> I need MHz.
  • [16:23:07] <thews> agmlego: if you need MHz you probably want to write it out in C anyhow
  • [16:23:25] <mdp> agmlego, take it to 11 by using the PRU
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  • [16:23:48] <agmlego> thews: Why would I want to do that?
  • [16:23:54] <agmlego> mdp: Also working on that too.
  • [16:23:59] <agmlego> Or will be.,
  • [16:24:46] <thews> agmlego: you'll find the BBB cpu to be underwhelming MHz operations on a scripted language on 1000MHz CPU can be interesting
  • [16:25:18] <thews> and 1000MHz CPU that lacks lots of good instruction sets
  • [16:25:23] <agmlego> thews: I think that it will be fine, actually.
  • [16:25:34] <thews> AVX FPU would be nice
  • [16:25:53] <agmlego> I just need to be a touch closer to the hardware than the sysfs abstraction layer.
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  • [16:27:57] <agmlego> thews: Also, I have a fair amount of experience with the CPU on the bones. It is a perfectly servicable device.
  • [16:28:07] <agmlego> *CPUs
  • [16:29:40] <thews> agmlego: I have a little bit of experience with different instruction sets and limitations , not nearly as much as some kernel developers and scientific devs though
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  • [16:30:14] <agmlego> thews: The good news is, I am not aiming at doing high-performance computing on a $40 SBC.
  • [16:30:27] <agmlego> I am using it as a realtime controller, which is what it was designed for.
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  • [16:31:16] <thews> realtime has a lot of meanings these days
  • [16:31:39] <agmlego> thews: I am aware.
  • [16:31:49] <agmlego> I get paid to do industrial automation.
  • [16:32:02] * rsalveti (~rsalveti@unaffiliated/rsalveti) Quit (Ping timeout: 264 seconds)
  • [16:35:23] <thews> agmlego: what is the latency of python responding to real-time interrupts?
  • [16:36:00] <agmlego> Have not measured that yet.
  • [16:36:33] <thews> agmlego: what about IO blocking times?
  • [16:38:32] <agmlego> thews: It is difficult for me to tell whether you are genuinely curious about a subject I have stated that I have not yet done the research on to have solid figures for, or if you are just being deliberately combative to try and prove some unknown point.
  • [16:38:56] <agmlego> TL;DR: Not sure if real or troll.
  • [16:39:01] <thews> agmlego: I am genuinely interested, to be helpful to you, I recommend you check out stackless
  • [16:39:22] <thews> but I don't think you'll possibly get any real-time usefulness out of python, because of the issues above
  • [16:39:33] <thews> sysfs will be less limiting than python itself
  • [16:39:43] <thews> python thread creation for one is terribly slow
  • [16:40:06] <agmlego> I think you are underestimating the interpreter, and also naively assuming that I will be using the default one with no performance modifications.
  • [16:40:14] <agmlego> But thank you for your unrequested advice. ;-P
  • [16:40:20] <thews> agmlego: I just have experience in these things
  • [16:40:27] <agmlego> Yes. As do I.
  • [16:40:38] <agmlego> A big part of the automation I get paid to do, is done with Python.
  • [16:40:40] <thews> agmlego: I've worked with timing constraint stuff for emergency systems for the last 8 years
  • [16:41:03] <agmlego> ANd I have worked with high-speed machine vision for the last 6.
  • [16:41:25] <thews> another place where python would not be well suited, maybe if you used C extensions
  • [16:41:25] <agmlego> So lets both put our penises back in our trousers, and accept that each other may actually have a clue about this stuff. ;-P
  • [16:42:26] <agmlego> Python works just fine for all the glue work around the system, including acting as the communications and control interfaces.
  • [16:42:53] <agmlego> The actual image-processing is not done with Python, but basically everything else is.
  • [16:44:04] <thews> I do similar things, but I call it scripting, because I feel like that I'm being honest with myself in those cases and I prefer the ease of programming with scripted languages, and the code clarity, and rapid development
  • [16:44:51] <agmlego> A rose by any other name, but if that helps you sleep at night, whatever.
  • [16:44:56] <thews> but I can't handle 1M iops in scripted languages
  • [16:45:02] <thews> I'm honest with myself there
  • [16:45:17] <agmlego> Right, you said that already.
  • [16:45:28] <carpman> IF you want to do real time programing in python, GO HOME. </rant>
  • [16:45:35] <agmlego> But you say it in a way that makes it sound like you are accusing me of somehow lying to *myself*.
  • [16:45:50] <thews> agmlego: if that's what you feel
  • [16:45:56] <agmlego> But then again, I am arguing with someone on the Internet.
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  • [17:09:57] <bpetersen> This is a slightly random question but how long should I test for over temperature protection of a device? Would 4 hours be sufficient or should I go for like 24 hours?
  • [17:11:25] <thews> bpetersen: what are you testing?
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  • [17:13:45] <thews> bpetersen: and for what reason? I imagine for QA testing, you'd only need to test it once in quantity, is this for TCO?
  • [17:14:31] <thews> bbiab
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  • [17:18:25] <bpetersen> its to test a motor
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  • [17:18:54] <bpetersen> small one about 1 foot tall
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  • [17:19:24] <bpetersen> Yea QA testing
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  • [17:22:23] <bpetersen> Are there more IRCs for electrical engineering?
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  • [17:46:42] <thews> bpetersen: not sure for thermal stuff you'd need to give it quite a load, and over drive it
  • [17:47:23] <thews> bpetersen: lots of stuff in the channel list with electr*
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  • [18:00:51] <agmlego> "small [motor]"..."about *1 foot tall*"
  • [18:01:04] <agmlego> Uh, yeah, in this channel, that would be a *massive* motor.
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  • [18:12:13] <trav> does anybody know when the beaglebone is back in stock and how many will be available? Is this a hard to get item?
  • [18:12:59] <jkridner> more are shipping to distributors all the time and CCo is splitting up shipments to all distributors end up getting some. Best to place an order early and be next in line.
  • [18:13:26] <trav> I see
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  • [18:20:06] <agmlego> ANd if you really do not wqant to wait, basically all the componets are in-stock at Digikey, and you can get the board made at your local PCB fab house of choice. ;-P
  • [18:21:50] <prpplague> trav: basically all the stock was purchased up to supply to microcenter and radioshack recently for the christmas shopping season
  • [18:21:59] <prpplague> trav: we are ramping up production to compensate
  • [18:22:18] <prpplague> trav: you should see inventories updated within the next few days at most of the distributors
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  • [18:30:31] <prpplague> jkridner: ping
  • [18:30:36] <jkridner> ???
  • [18:33:09] <jkridner> prpplague: ????
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  • [18:40:34] <thews> jkridner: did you hear back from TI on the "customization" ?
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  • [18:58:03] <prpplague> thews: customization?
  • [18:58:22] <thews> sgx driver
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  • [19:02:51] <prpplague> thews: ahh
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  • [19:38:11] <mckennetho> Hi everyone, I was interested in some help with a basic cross-compilation error for Beaglebone Black. This is in Eclipse, in Ubuntu, I'm getting a Symbol 'cout' could not be resolved error. I have all of my include and library path directories set up correctly, and I can see a list of functions when I type "std::" but cout is not there ?! I'm new to eclipse and linux programming, my Libraries field is empty, could this be the caus
  • [19:41:14] * mrpackethead (~mrpacketh@207.30.56.252) has joined #beagle
  • [19:44:29] <mckennetho> <iostream> is included, c++ versions are 4.6 and 4.6.3
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  • [19:48:16] <mckennetho> brb,,
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  • [20:38:24] <mckennetho> hmm still looking for help.. thanks,
  • [20:40:06] <thurgood> you included iostream.h?
  • [20:40:13] <GumShoe> mckennetho Have you seen this tutorial from Derek Molloy? http://derekmolloy.ie/beaglebone/setting-up-eclipse-on-the-beaglebone-for-c-development/
  • [20:41:15] <mckennetho> this is the one I am following
  • [20:42:25] <GumShoe> I am trying to configure Eclipse in windows (without a linux vitual box) for cross development. Close but no cigar yet.
  • [20:42:28] <mckennetho> set up exactly the way it is in the tutorial, yes iostream is included
  • [20:43:11] <thurgood> hmm, did you set up c++ manually, or use build essential?
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  • [20:44:22] <mckennetho> I just did the Hellow World C++ project, if that's what you mean, but I had to include all of c++ directories, in the video they were already included. Is this an include or a library error?
  • [20:45:14] <mckennetho> Int he video you can't see what libraries he has included :/
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  • [20:46:15] <thurgood> can you pastebin your cpp file?
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  • [20:49:01] <mckennetho> It's just 3 lines
  • [20:49:23] <mckennetho> #include <iostream>
  • [20:49:28] <mckennetho> using namespace std;
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  • [20:50:00] <mckennetho> int main(){ cout<< "test" <<endl; return0;}
  • [20:50:17] <preplasma> hi
  • [20:50:38] <thurgood> you'll need a space between the return and the 0
  • [20:51:10] <preplasma> one question : can i use gpio in android ?
  • [20:52:53] <_av500_> sure
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  • [20:54:41] <preplasma> any link ?
  • [20:55:34] <mckennetho> sorry that was a typo, I'm on a pc, compiling on a different machine
  • [20:55:51] <_av500_> Android is Linux
  • [20:55:57] <_av500_> linux can use GPIOs
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  • [20:56:31] <_av500_> but here: https://www.google.com/search?q=android+gpio
  • [20:56:48] <mckennetho> do you know if this is a c or c++ include error? And what is build essential?
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  • [21:02:56] <mdp> _av500_, which link will work?
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  • [21:09:05] <mckennetho> If I build a regular project that is not cross-compiled, everything works well
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  • [21:13:39] <mckennetho> the error seems to happen when I include /usr/arm-linux-gnueabi/include/c++/4.6.3 under c++ includes
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  • [21:15:30] <thurgood> did you use the cross settings for your project?
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  • [21:18:05] <palesius_> does anyone know how to programatically cut power to the host port on a BBB? I have a device that I'm interfacing with via libusb that sometimes misbehaves and needs to be physically disconnected/reconnected in order to function again.
  • [21:18:26] <_av500_> not sure you cut power
  • [21:18:33] <_av500_> did you check the schematics?
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  • [21:20:53] <mckennetho> yes, hmm I just noticed that when I do a build, eventhough it gives me those "symbol could not be resolved" fatal errors, it still compiles an executable
  • [21:21:56] <mckennetho> and I just tested the executable, and it worked just fine, so this has to be an Eclipse incompatilbity bug. It's the newest version too.
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  • [21:25:57] <mckennetho> sorry nm, even though it compiles when it shows error, it compiles a previous version and it doesn't show my changes, I don't understand this IDE
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  • [21:34:38] <thurgood> eclipse works fine for cross compiling, if you have a cross toolchain configured and make the project use it
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  • [21:36:30] <mckennetho> I have, I figured it out but I still can't explain why it shows fatal errors but compiles and works :/ must be a bug in eclipse
  • [21:37:10] <thurgood> if you cancel out of a debug build it does that occasionally, restarting Eclipse resets it
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  • [21:45:31] <GumShoe> I'm running Angstrom Linux beaglebone 3.8.13 #1 SMP. I'm attempt to work this bonescript example for a shift register http://beagleboard.org/support/BoneScript/shiftOut/
  • [21:45:55] <GumShoe> Not sure if my bonescript supports it.
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  • [21:46:12] <GumShoe> beaglebone:~# opkg list-installed | grep bonescript
  • [21:46:12] <GumShoe> bonescript - 1.0-r21.5
  • [21:46:12] <GumShoe> beaglebone:~#
  • [21:46:16] <GumShoe> beaglebone:~# opkg list-installed | grep bonescript
  • [21:46:16] <GumShoe> bonescript - 1.0-r21.5
  • [21:46:16] <GumShoe> beaglebone:~#
  • [21:46:53] <GumShoe> I note this in the tutorial: Note: This doesn't work until BoneScript version 0.2.3
  • [21:47:18] <prpplague> GumShoe: please don't paste more than one line here
  • [21:47:30] <prpplague> GumShoe: if you need more lines, please use a service like pastebin
  • [21:48:35] <GumShoe> looks like I'm running 0.2.15 ???
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  • [22:21:58] <GumShoe> I'm losing it, or this diagram is wrong. About 60% down the page an image of the BBB with P8 and P9 reversed/mislabeled http://letsmakerobots.com/node/37063
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  • [22:23:10] <rob_w> why dont you use the official pdf '?
  • [22:23:33] <GumShoe> I'm looking through that now.
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  • [22:27:13] <N2TOH> GumShoe, there are conflicting sets of pinouts. refer to the manufactures page
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  • [22:42:43] <ITAfterDark> Has anyone had any luck getting CentOS on a beagleboard-xm?
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