**** BEGIN LOGGING AT Sat Jan 12 02:59:59 2013
Jan 12 04:04:05 <metalbot> if i have a beaglebone that boots fine, but isn't recognizable on Windows/osx/linux, any suggestions on next steps?
Jan 12 04:04:20 <metalbot> tail of dmesg shows buffer I/O errors
Jan 12 04:29:22 <mranostay> next steps? whoa  you are skipping exact steps first
Jan 12 04:35:40 <metalbot> can you point me at exact steps.  i'm obviously missing something dumb.
Jan 12 04:36:11 <metalbot> it's an A6 board, so (from reading "getting started page") i don't think i need the drivers (at least for osx/linux)
Jan 12 04:37:43 <metalbot> under windows, it sees an unformatted removable drive.  under osx, it sees nothing.  under linux, i can see the connection in dmesg
Jan 12 04:38:00 <metalbot> then drops when it gets the i/o error
Jan 12 04:40:21 <mranostay> pastebin the messages
Jan 12 04:42:30 <metalbot> http://pastebin.com/0hfXk9Gk
Jan 12 04:46:10 <metalbot> fwiw, i've got a DVI cape on it, and it boots ok if i just plug it into a monitor
Jan 12 05:12:42 <XorA> metalbot: buy a more expensive SD card :-D
Jan 12 05:14:01 <XorA> oh actually thinking of the wrong thing!
Jan 12 05:14:36 <metalbot> it just seems weird that it would boot ok, but not operate in storage mode
Jan 12 05:15:04 <metalbot> previous owner never hooked it to another machine - he was just using directly on a monitor
Jan 12 05:57:07 <yates> how do you configure the serial parameters (baud rate, etc.) under linux for the serial console of a beagleboard XM?
Jan 12 05:57:37 <yates> i've tried "setserial -G /dev/ttyUSB0" but i get "Cannot get serial info: Invalid argument"
Jan 12 05:57:51 <yates> correction:
Jan 12 05:58:02 <yates> not. no, that's correct.
Jan 12 06:08:17 <yates> Bus 004 Device 003: ID 06cd:0121 Keyspan USA-19hs serial adapter
Jan 12 06:08:32 <yates> is this device incompatible with the default linux usb-serial driver?
Jan 12 06:08:42 <yates> 3.4.11-2.16-desktop
Jan 12 06:08:47 <yates> (openSUSE 12.2)
Jan 12 06:36:53 <Silent_Lover> HI every 1
Jan 12 06:37:38 <Silent_Lover> is any body there
Jan 12 06:38:05 <emeb_mac> nope. we're all gone
Jan 12 06:38:18 <Silent_Lover> where dear
Jan 12 06:38:43 <Silent_Lover> then y that list seems to be fill
Jan 12 06:39:00 <Silent_Lover> i need some help
Jan 12 06:39:23 <mranostay> emeb_mac: in some sense we are always here :P
Jan 12 06:39:38 <Silent_Lover> PLZ HELP MEEE
Jan 12 06:40:52 <Silent_Lover> helo
Jan 12 06:41:17 <emeb_mac> ask your question. stop begging.
Jan 12 06:42:18 <Silent_Lover> where can i get the accessories of BeagleBoard-xM
Jan 12 06:42:18 <mranostay> i'm getting a brew
Jan 12 06:42:30 <mranostay> er have a credit card?
Jan 12 06:42:44 <Silent_Lover> nope
Jan 12 06:43:14 <Silent_Lover> give me the farnell code of that
Jan 12 06:44:44 <Silent_Lover> Could any one give me the links where i can buy accessories of BeagleBoard-xM
Jan 12 06:44:52 <emeb_mac> what kind of accessories do you want?
Jan 12 06:45:47 <Silent_Lover> USB Mini-A to USB A Female OTG Cable
Jan 12 06:46:14 <yates> what's the default serial port parameters for the beagle xm?
Jan 12 06:46:24 <Silent_Lover> CABLE ASSEM HDMI-DVI 19POS
Jan 12 06:46:31 <emeb_mac> https://specialcomp.com/beagleboard/index.htm
Jan 12 06:46:40 <yates> i've searched and searched the manual but no joy.
Jan 12 06:47:57 <Silent_Lover> emeb i already have it but my company need only farnell code for that
Jan 12 06:48:43 <Silent_Lover> like for Beagle XM the code is 1823269
Jan 12 06:49:07 <Silent_Lover> also in that no accessories included
Jan 12 06:49:09 <mranostay> emeb_mac: have fun :)
Jan 12 06:49:16 <emeb_mac> heh
Jan 12 06:49:59 <emeb_mac> mranostay: you don't want to stick around and help fill the empty aching void?
Jan 12 06:51:27 <yates> got it
Jan 12 06:59:25 <yates> it's working now with minicom.
Jan 12 06:59:27 <yates> cool.
Jan 12 07:14:12 <yates> is there a how-to showing how to rebuild the angstrom/the kernel from a standard x86_64 desktop machine (openSUSE 12.2)?
Jan 12 07:14:38 <yates> and reflashing the miniSD?
Jan 12 11:49:50 <Yann_> Hello every one! i have a Beagle bone A6 . The tutorial http://beagleboard.org/static/beaglebone/latest/README.htm explain that i don't have to install drivers but when i try to put the LED USR3 ON with Cloud9 that doesn't work... (I work on Ubuntu 12.10 and just begin with this card^^)
Jan 12 12:06:12 <Yann_> hey! My computer shutdown. As I said,  I have a probleme on cloud 9. I'm trying the test code to make the led bliking,but the led d'ont blink on the card. (I am  on Ubuntu 12.10 and I just begin with this card)
Jan 12 12:43:19 <lambert> Yann_: make sure you aren't running it in debug mode... it runs just fine
Jan 12 13:14:51 <Yann_> lambert: i made it but that doesn't work... no error , the console (in cloud9IDE) said "true"
Jan 12 14:12:56 <pisolg> hi someone can help me on g_printer module?
Jan 12 19:21:55 * _av500_ does not print
Jan 12 21:58:51 <pfefferz_> mranostay, happy Sat
Jan 12 22:20:46 <yates> koen: i heard you are involved in gathering patches for the angstrom bbxm builds - true?
Jan 12 22:21:11 <yates> what's the chances of getting a 3.5.x kernel up so we can use the bluez 5.1 stack?
Jan 12 22:21:50 <yates> s/what's/what are/
Jan 12 22:22:48 <yates> koen: ?
Jan 12 23:18:03 <mranostay> howdy
Jan 12 23:51:16 <trelane> how accurate are the ADC pins on the beaglebone, using a 10k thermistor I'm getting a temperature that's about 17F too high
Jan 12 23:51:25 <trelane> thermistor gives a valid reading on a teensy
Jan 12 23:52:06 <prpplague> trelane: accuracy is going to based on the range and the bit depth of the adc
Jan 12 23:52:34 <trelane> I'm wondering if there might be some resistance that I'm not accounting for?
Jan 12 23:53:31 <mranostay> prpplague: hey purple
Jan 12 23:53:33 <trelane> my question therefore isn't about bit depth, which shouldn't matter in this formula much, it's giving me an answer that appears to be wrong
Jan 12 23:53:56 <prpplague> mranostay: greetings
Jan 12 23:54:09 <prpplague> trelane: bit depth always counts
Jan 12 23:54:13 <mranostay> the AIN pins are floating
Jan 12 23:54:47 <prpplague> travalas: if the teensy is using 10bit and the beagle is configure for 8-bit, each values represents a bigger "block"
Jan 12 23:54:54 <prpplague> travalas: or "range"
Jan 12 23:55:34 <mranostay> prpplague: was apartment shopping in MV today... fun prices :)
Jan 12 23:55:44 <prpplague> mranostay: ugh, don't tell me
Jan 12 23:55:54 <prpplague> mranostay: i am already nervous
Jan 12 23:56:40 <trelane> right and I'm doing simple math on a voltage divider and the answer I'm getting is wrong.  the 10k thermistor using a voltage divider and some math is giving me a measurement of 7731 ohms, if I stick it on a multimeter I'm getting 9963 ohms.  I've checked the 10k thermistor it's accurate to 1%
Jan 12 23:56:59 <mranostay> prpplague: working on my poker face when the one was $3k for a 1 bedroom :)
Jan 12 23:57:43 <prpplague> travalas: sounds like you are missing something then.... and/or leaving out some information
Jan 12 23:57:54 <prpplague> mranostay: holy cow
Jan 12 23:58:47 <mranostay> prpplague: yeah needless to say that one is a little of my price range :)
Jan 12 23:59:39 <prpplague> mranostay: i hear the dumpsters behind most chillies are nice and they have free continetal breakfast
Jan 12 23:59:48 <Russ> are you sure you have the right voltage level?
Jan 13 00:01:24 <prpplague> Russ: that was my next question
Jan 13 00:01:32 * prpplague hands the reins over to Russ
Jan 13 00:01:39 <Russ> 1.8V, 3.3V, 5V
Jan 13 00:02:10 <Russ> 2.5V
Jan 13 00:02:20 <trelane> Russ I'm running 1.8 from the header to the thermistor, which shouldn't care about voltage
Jan 13 00:02:45 <Russ> have you measured and make sure it's 1.8V?
Jan 13 00:02:58 <trelane> it shouldn't matter if all I'm doing is comparing two resistors
Jan 13 00:03:34 <mranostay> there is a 1.8v from the header?
Jan 13 00:03:41 <trelane> mranostay, yes :)
Jan 13 00:03:49 <trelane> 1.75ish actually but it's there
Jan 13 00:04:11 <Russ> and what's vdd_adc?
Jan 13 00:04:17 <Russ> (connected to vrefp, vrefn)
Jan 13 00:04:54 <Russ> (pretty sure it's also 1.8V)
Jan 13 00:05:16 <Russ> although, really, I'd use vdc_adc on the expansion header rather than just some 1.8 digital source
Jan 13 00:05:24 <trelane> Russ: all I'm doing is (40960000/ain2)-10000
Jan 13 00:05:55 <Russ> its just if you are connecting your thermistor to 1.8V digital, you could be getting noise
Jan 13 00:06:06 <trelane> the actual number seems stable
Jan 13 00:06:44 <Russ> well it'd be noise of a higher frequency than the sampling rate
Jan 13 00:06:46 <trelane> which is why I'm running the 10k thermistor to ground and a 10k resistor from vdc_adc
Jan 13 00:07:03 <Russ> ok, so you are connecting to vdc_adc rather than just 1.8v?
Jan 13 00:08:24 <trelane> right
Jan 13 00:09:44 <trelane> vddadc ---- 10k resistor --|-- 10k thermistor ---- ground
Jan 13 00:10:03 <trelane> with the ain2 pin at the |
Jan 13 00:13:13 * Russ gets confused looking at the trm trying to figure out how ain2 is actually read
Jan 13 00:13:38 <Russ> ah, there it is FIFO0DATA, FIFO1DATA
Jan 13 00:14:35 <Russ> ok, so lets see, 12 bits of precision, with 0x000 being vrefn and 0xfff being vrefp?
Jan 13 00:15:08 <trelane> I'm not getting anywhere near that advanced but yes it's 12 bits, all I'm doing is directly reading the file in /proc associated with that pin which gives me a number between 0 and 4096
Jan 13 00:15:18 <trelane> behaves basically like an arduino but more precise
Jan 13 00:16:43 <trelane> seeing gnd_adc
Jan 13 00:17:21 <Russ> isn't there some natural log or something involved in the calculation?
Jan 13 00:18:45 <Russ> or are you just concerned with getting R right now?
Jan 13 00:19:39 <trelane> I'd like to get R but yes I'll be taking natural log later
Jan 13 00:19:47 <trelane> I'm trying to get a number that approximates what I'm getting on my multimeter
Jan 13 00:20:08 <trelane> I have the same formula working on a teensy2
Jan 13 00:20:14 <trelane> sitting next to the bone
Jan 13 00:21:48 <trelane> once I get a validly measured resistance I just throw that in Steinhart Hart and I get a temperature in Kelvin
Jan 13 00:22:05 <trelane> it bothers me that this is off but only just a little (making me think that there is additional resistance on that pin
Jan 13 00:23:06 <Russ> so the number you are reading is?
Jan 13 00:23:28 <trelane> 2210 presently
Jan 13 00:24:07 <yates> what are the chances of getting a 3.5.x kernel up so we can use the bluez 5.1 stack?
Jan 13 00:25:49 <trelane> Russ: that gets me a reading of 28C or 83F, I have a termometer from Oregon Scientific sitting less than an inch from the termistor giving me 71.6, and trust me it's not 83 in here
Jan 13 00:28:34 <trelane> yates: if you're using open embedded and have a development tree building a kernel isn't too horribly difficult
Jan 13 00:28:47 <trelane> open embedded also murders innocent baby penguins in their sleep
Jan 13 00:28:55 <Russ> and do you have a multimeter you are reading ain2 with?
Jan 13 00:29:13 <trelane> no but I can measure htat
Jan 13 00:30:12 <Russ> could you?
Jan 13 00:30:36 <trelane> .961v between
Jan 13 00:31:12 <Russ> 1.8V*2210/4096 = .971V
Jan 13 00:31:29 <trelane> right
Jan 13 00:32:18 <trelane> which means that the measurements I'm getting from the ADC pin are wrong
Jan 13 00:32:41 <trelane> I would bet that if I reverse that and solve for .961V
Jan 13 00:32:42 <Russ> .961v vs 0.971v?
Jan 13 00:32:45 <trelane> I would get the correct temperature
Jan 13 00:33:04 <trelane> right
Jan 13 00:33:24 <Russ> that's off by less than 1%
Jan 13 00:33:47 <trelane> I'm only off by about 5 degrees celsius
Jan 13 00:35:19 <Russ> I'm calculating 11.7k for Rt
Jan 13 00:36:05 <Russ> I don't think (40960000/ain2)-10000 is right
Jan 13 00:36:27 <Russ> 10k/(1-ain2/4096)?
Jan 13 00:36:44 <trelane> that is working on the teensy
Jan 13 00:37:03 <Russ> er, 10k/(1-ain2/4096) - 10k
Jan 13 00:37:06 <Russ> hold on
Jan 13 00:37:09 <trelane> http://playground.arduino.cc/ComponentLib/Thermistor2
Jan 13 00:38:47 <Russ> I = (vadc-ain2)/10k
Jan 13 00:39:16 <Russ> Rt=ain2*10k/(vadc-ain2)
Jan 13 00:39:48 <Russ> Rt=10k/(ain2/vadc - 1)
Jan 13 00:40:09 <Russ> er, those should be Vain2
Jan 13 00:40:32 <Russ> Vain2=vadc*ain2/4096
Jan 13 00:40:53 <Russ> Rt=10k/(ain2/4096-1)
Jan 13 00:41:20 <Russ> gah, I suck at math on irc
Jan 13 00:41:29 <trelane> yeah it's hard to represent math on one line
Jan 13 00:43:40 <Russ> try
Jan 13 00:43:45 <trelane> I just measured it at 11.5kohm
Jan 13 00:43:47 <Russ> Rt=10k/(4096/ain2-1)
Jan 13 00:44:27 <trelane> 11717
Jan 13 00:44:58 <Russ> their circuit is not the same as your circuit
Jan 13 00:45:24 <Russ> vddadc ---- 10k resistor --|-- 10k thermistor ---- ground
Jan 13 00:45:29 <Russ> [Ground] ---- [10k-Resister] -------|------- [Thermistor] ---- [+5v]
Jan 13 00:46:25 <Russ> and with that, I think I'll take the dogs for a walk
Jan 13 00:46:57 <trelane> and we have 70.55F
Jan 13 00:46:59 <trelane> you win!
Jan 13 00:47:00 <trelane> thanks!
Jan 13 00:50:31 <WebcamWonder> Umm, quick question: Is there a "common" diode/level translator/something else way to protect the GPIO pins on the BeagleBoard? My friend has already fried a BeagleBoard and we really don't want to do it again :(
Jan 13 00:53:46 <trelane> depends on the circuit all pins are 3.3v except the adc pins which are 1.8v
Jan 13 00:54:05 <trelane> I always test anything I'm about to plug into the board on a multimeter first
Jan 13 00:54:10 <trelane> haven't fried a board yet
Jan 13 00:57:09 <WebcamWonder> Yeah, I was reading up here: https://groups.google.com/forum/?fromgroups=#!topic/beagleboard/aOm8_AMjDbc but there wasn't a single consensus
Jan 13 00:57:28 <WebcamWonder> I'm worried about the 3.3 V GPIO pins, last time we shorted a 5 V's output with one of GPIO pins
Jan 13 00:57:52 <WebcamWonder> 10 minutes before our project was to be demoed...
Jan 13 01:11:19 <trelane> WebcamWonder, don't do that and it won't break :)
Jan 13 01:12:19 <trelane> I try to avoid having the 3.3V pins exposed to the project voltage by having them switch a FET isntead of whatever the real switch is
Jan 13 01:12:24 <trelane> that also allows 5v switching logic
Jan 13 01:12:40 <Russ> I would just buy some level translators off sparkfun
Jan 13 01:12:53 <Russ> or trelane's idea
Jan 13 01:12:58 <trelane> https://www.sparkfun.com/products/10213
Jan 13 01:13:12 <trelane> that will switch at 3.3v, and protect your GPIO from other voltage
Jan 13 01:13:13 <Russ> if you are really paranoid, you can buy opto-isolators
Jan 13 01:13:35 <trelane> if you're that paranoid you're probably already on that doomsday bunker show :)
Jan 13 01:14:27 <trelane> WebcamWonder, if you want to use mosfets, this is fairly useful though it's for an arduino everything is pretty similar: http://bildr.org/2012/03/rfp30n06le-arduino/
Jan 13 01:15:10 <trelane> also the 3.3v pins are "weak" compared to ardino or other, it's really not a bad idea to use the fets anyway as they don't require much current
Jan 13 01:15:38 <Russ> please make careful note of the diode on the motor :){
Jan 13 01:15:40 <Russ> er, :)
Jan 13 01:18:58 <trelane> indeed! or just throw a HUGE CHUNKY RELAY after the mosfet :)
Jan 13 01:19:20 * mranostay yawns
Jan 13 01:19:23 <mranostay> morning
Jan 13 01:21:48 <trelane> Russ: ages ago a friend of mine pointed me to these http://www.mpja.com/10A-480VAC-Solid-State-Relay/productinfo/17154+RL/.  If I absolutely do not trust something I stick that after the mosfet
Jan 13 01:24:52 <WebcamWonder> Sweet, thanks a lot for the choices guys! :)
Jan 13 01:26:00 <WebcamWonder> Would a simple zener also work? (hardware noob here:( ), was looking at this: http://www.thebox.myzen.co.uk/Raspberry/Breakout.html
Jan 13 01:26:18 <WebcamWonder> And it seems to use a zener and a resistor
Jan 13 01:27:14 <trelane> WebcamWonder, no worries.
Jan 13 01:27:14 <trelane> fets are cheap in bulk and if you need current to push something VCC will give you much more than the 3.3v GPIO
Jan 13 01:28:04 <trelane> probably but that requires math and my brain is broken now :)
Jan 13 01:28:13 <trelane> also diodes require current/voltage to work
Jan 13 01:28:16 <trelane> so you have to factor that in
Jan 13 01:30:30 <WebcamWonder> Given that we don't have anything really complicated connected to our beagleboard, I think I'll go pick up some fets then :)
Jan 13 01:51:04 <yates> trelane: i can build _a_ linux kernel, but can i build a >=3.5.x linux kernel?
Jan 13 01:52:21 <yates> and would you suggest using the openembedded tools directly instead of the angstrom build?
Jan 13 01:53:05 <mrpackethead_> i'm using debian
Jan 13 01:53:24 <mrpackethead_> and its worked out to be pretty easy..
Jan 13 01:53:55 <yates> mrpackethead_: what kernel version have you gotten to work?
Jan 13 01:54:22 <mrpackethead_> i'm just not sure what the advantage of the angstrom / oe thing is.
Jan 13 01:54:44 <mrpackethead_> just a sec
Jan 13 01:54:59 <yates> can you customize debian so that, e.g., you don't build in the x11 or desktop environment stuff?
Jan 13 01:55:11 <yates> x11 server, thatis.
Jan 13 01:55:18 <mrpackethead_> 3.2.33-psp26
Jan 13 01:55:24 <yates> pretty decent.
Jan 13 01:55:41 <yates> still short of the 3.5.x that bluez 5.x requires, though...
Jan 13 01:55:56 <mrpackethead_> yes, i don't have any X / desktop stuff installed
Jan 13 01:56:00 <yates> mrpackethead_: is that a rev 3.1.0 board?
Jan 13 01:56:14 <mrpackethead_> i have some v5 and v6 boards
Jan 13 01:56:19 <mrpackethead_> they both work without issue
Jan 13 01:56:53 <mrpackethead_> I went down the debian path, mainly because it was what i was familar with
Jan 13 01:57:25 <mrpackethead_> i seem to get the impression though that some people think that the angstrom system is better, but i've not got any idea why
Jan 13 01:58:31 <yates> yeah, me too.
Jan 13 02:01:28 <yates> mrpackethead_: does your build include the apt package manager so that you can install stuff from their repos?
Jan 13 02:03:25 <yates> mrpackethead_: do you have a good pointer on how to build debian? i'm getting too much variety in my google hits
Jan 13 02:14:01 <mrpackethead_> yates: yes, apt- works
Jan 13 02:14:30 <mrpackethead_> i use a net-installer
Jan 13 02:14:57 <yates> do you native build or cross-build?
Jan 13 02:15:52 <mrpackethead_> native
Jan 13 02:16:06 <mrpackethead_> but thats jsut so far
Jan 13 02:16:53 <mrpackethead_> https://github.com/RobertCNelson/netinstall
Jan 13 02:17:00 <mrpackethead_> grab this netinstall
Jan 13 02:17:31 <mrpackethead_> run on a *nix machine of some kind, and create the bootloader on the sdcard
Jan 13 02:17:43 <mrpackethead_> pop your sdcard into the beagle, connect to the network
Jan 13 02:17:48 <mrpackethead_> and follow your nose
Jan 13 02:17:51 <mrpackethead_> its pretty simple.
Jan 13 02:26:57 <mranostay> holy spamming batman
Jan 13 02:42:43 <yates> mranostay: ok, thanks for the pointers!
Jan 13 02:44:24 <mranostay> what did i do now?
Jan 13 02:44:38 <yates> doh!
Jan 13 02:44:49 <yates> i mean mrpackethead_: thanks for the pointers!
Jan 13 02:44:57 * yates bangs head on wall
**** ENDING LOGGING AT Sun Jan 13 02:59:58 2013