• [00:00:38] <emeb> koen: looks like the DVI enable line that used to be on GPIO_12 got moved.
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  • [00:01:33] <koen> could be
  • [00:01:45] <koen> I'm getting a new rev of the DVI board next week
  • [00:02:04] <koen> mostly to work on the EEPROM stuff
  • [00:02:22] <emeb> err - was on P8-4. GPIO1_7
  • [00:02:32] * johngalt (~jgalt_@pool-71-105-122-106.lsanca.dsl-w.verizon.net) Quit (Ping timeout: 252 seconds)
  • [00:02:36] <emeb> I was unhappy about that - interferes with using the GPMC.
  • [00:02:49] <koen> ad7
  • [00:03:25] <emeb> Wonder where it is now.
  • [00:03:44] <emeb> Hopefully some random place on P9
  • [00:06:26] <emeb> Ah - there it is on P9-42. Much better.
  • [00:09:29] <emeb> koen: my concern w/ the audio circuit after looking at the old schematic was the codec was set up as a slave, but the MCLK appeared to come from a crystal on-board. Looked like potential for sync problems.
  • [00:10:35] <ds2> isn't using a codec pin expensive?
  • [00:12:30] <emeb> ds2: not sure what you mean.
  • [00:12:49] <ds2> emeb: it uses a lot of pins... I2S is DIN, DOUT, FS, CLK at the least
  • [00:13:33] <emeb> ds2: true. But unless the codec has an SRC inside the MCLK needs to be sychronous to the BCLK & FS
  • [00:13:46] <emeb> Or else the Codec has to be the master.
  • [00:13:52] <ds2> make the codec master
  • [00:13:54] <ds2> yeah
  • [00:14:00] <ds2> there is limited pins, hence...
  • [00:14:03] <emeb> That's what I want to do on mine.
  • [00:14:22] <emeb> That's the way the codec on the Beagleboard is set up too.
  • [00:14:25] <ds2> I am looking at other audio options with fewer pins
  • [00:14:32] <emeb> like...?
  • [00:14:36] <ds2> PWM
  • [00:14:52] <emeb> Ah. Not what you'd call audiophile though.
  • [00:15:03] <ds2> why would you say that?
  • [00:15:10] <emeb> and not much good for audio input.
  • [00:15:11] * florian (~fuchs@Maemo/community/contributor/florian) Quit (Ping timeout: 252 seconds)
  • [00:15:32] <ds2> audio input? use the AIN lines
  • [00:15:39] <emeb> 12-bit?
  • [00:15:55] * lyakh (~lyakh@dslb-178-006-252-004.pools.arcor-ip.net) Quit (Quit: thanks, bye)
  • [00:15:55] <ds2> are you thinking of line in or mic in?
  • [00:16:36] <emeb> My app needs stereo in/out with 48kHz/16-bit
  • [00:16:57] <ds2> 'k
  • [00:17:25] <ds2> was thinking more along the lines of FM quality output and maybe a mic input
  • [00:17:28] <emeb> If you're just doing phone/voice quality though PWM & on-chip ADC would probably be fine.
  • [00:17:41] <ds2> the audio out on the beagle xm/classics aren't exactly audiophile quality either
  • [00:17:55] <emeb> Yeah - FM (15kHz/50dB) is probably about right.
  • [00:18:09] <ds2> PWM can get better then that
  • [00:18:22] <ds2> isn't that otherwise know as a 1bit ADC?
  • [00:18:25] <ds2> DAC I mean
  • [00:18:33] <emeb> Weeeellll - sorta
  • [00:18:44] <emeb> 1-bit DACs are really sigma-delta, not PWM
  • [00:19:05] <ds2> I was hearing of high quality CD players with PWM outputs
  • [00:19:21] <emeb> Interesting. That's new to me.
  • [00:19:27] <ds2> this was back in the 90's
  • [00:19:37] <ds2> but I donno how fast they run the clock at
  • [00:19:37] <emeb> Hmmm.
  • [00:19:54] <emeb> Not really used these days. All sigma-delta.
  • [00:19:55] <ds2> nor do I know off hand how fast the PWM clock can be on the AM33x
  • [00:20:10] <emeb> good question.
  • [00:20:26] <ds2> the hw is basically an emitter follower on the line
  • [00:20:39] <ds2> clock at at like 200KHz and let the output element do the LPF
  • [00:20:42] <emeb> Yep. Hopefully with a good, clean Vdd
  • [00:21:16] <ds2> not sure if clean Vdd is that critical...just make sure any noise is really high up
  • [00:21:28] <emeb> So if you clock PWM @ 200kHz and want 15kHz of BW, that allows you roughly 4-bits resolution.
  • [00:21:45] <ds2> blah... make that 2MHz
  • [00:21:48] <ds2> :)
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  • [00:22:06] <ds2> should give some telco quality audio ;)
  • [00:22:28] <emeb> Yeah - about 7-bits then.
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  • [00:22:46] <emeb> roughly 42dB SNR
  • [00:23:32] <ds2> Hmmmm
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  • [00:26:08] <emeb> re: clean Vdd - any supply noise/ripple/etc goes straight to your audio output. Shades of the Beagleboard PMIC noise...
  • [00:27:12] <ds2> yes but if it isn't audible, i.e. make sure the noise is > 100KHz
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  • [00:28:07] <emeb> Problem is that things happening in the rest of the system aren't always that fast.
  • [00:28:39] <Alistair> Hey guys, need a little advice, have built meta-toolchain targeting beaglebone but environment setup script includes nothing for configuring opkg, any ideas why it may be missing?
  • [00:28:44] <emeb> eg: on Beagleboard I can hear when the SD card is accessed.
  • [00:29:07] <ds2> I am getting ahead of my self... the PMIC on the bone doesn't have enough capacity to handle everything so I have a local power source
  • [00:29:17] <ds2> that should be switching fast enough to not hear it
  • [00:30:06] <emeb> ds2: Good start - the switcher is faster, but make sure that you don't have slower loads turning on/off, like other peripherals that could pull the supply.
  • [00:30:49] <ds2> good point
  • [00:30:56] <ds2> I suppose I could throw in a local LDO
  • [00:31:06] <ds2> trying to keep it simple
  • [00:31:08] <emeb> ds2: that's what I would do.
  • [00:31:23] <ds2> problem is those damn LDOs are $$$$$$$
  • [00:31:28] <ds2> at least the ones I like ;)
  • [00:31:51] <emeb> what do you prefer? I get STM LM1117 equivalents for a few cents...
  • [00:32:04] <emeb> but they're not tiny...
  • [00:32:06] <ds2> the ones that are unconditional stable
  • [00:32:18] <ds2> I am tired of chasing down 1234132432432532542332124324 different caps in a design
  • [00:32:25] <emeb> there's that.
  • [00:33:42] <ds2> the power supply is turning out to be the most irksome part
  • [00:33:52] <ds2> special inductors, special caps, etc
  • [00:33:55] <emeb> I've heard that before.
  • [00:34:38] <ds2> esp. the notes about using caps with the ESR in the right range...not too low, not too high
  • [00:34:48] <emeb> Oh yeah.
  • [00:35:35] <emeb> spend a lot of time looking at cryptic passive part datasheets because of that.
  • [00:36:32] <emeb> lordy - latest oe seems to install a lot more x86 stuff...
  • [00:37:34] <ds2> for a while, using ceramics seems safe
  • [00:39:25] <emeb> big ceramics can be $$. Also, not good in the audio path - the materials are piezoelectric and can turn vibration into audio signal.
  • [00:40:06] <ds2> how big is it before it gets piezoelectric sensitive?
  • [00:40:27] <ds2> i remember articles on using old throughhole ceramic discs as drum sensors
  • [00:40:41] <emeb> most all ceramics have this to some extent, not really dependent on cap value IIRC.
  • [00:40:56] <emeb> but some dielectric types are better than others.
  • [00:41:23] <emeb> some tantalums are pretty good alternatives.
  • [00:41:44] <ds2> tantalums run the risk of the assembler f'ing it up
  • [00:41:57] <emeb> getting 'em in backwards, etc?
  • [00:42:04] <ds2> yep
  • [00:42:22] <emeb> make unambiguous marks in the silkscreen?
  • [00:42:32] <ds2> that assumes one have room to do so
  • [00:42:50] <emeb> true. How do you handle same problem with diodes/leds, etc
  • [00:43:00] <ds2> I guess in that case, I was inviting disaster with 2 oppositely oriented caps next to each other :)
  • [00:43:13] <emeb> maybe.
  • [00:43:14] <ds2> diodes are in SOT-23
  • [00:43:20] <ds2> LEDs, I just avoid them when i can ;)
  • [00:43:24] <emeb> hard to screw that up.
  • [00:43:54] <ds2> and it depends on the person at the helm... sometimes, they stop it and call to verify polarity but others just install it
  • [00:44:36] <emeb> Oy
  • [00:45:05] <ds2> hence the desire for noncritical caps on the LDO
  • [00:45:11] <emeb> yep
  • [00:45:42] <ds2> but that is only 1 part of it
  • [00:46:14] <ds2> the other is a potentially foolish trick of trying to do a 2 sided board for everything ;)
  • [00:47:05] <emeb> "for everything" meaning multiple applications?
  • [00:47:19] <ds2> I am trying to do a superbone carrier
  • [00:47:26] <ds2> Display, network, audio, power, etc
  • [00:47:38] <ds2> stacking is silly
  • [00:47:46] <ds2> unless you are building the beagleskyscraper ;)
  • [00:48:16] <emeb> Aha - kind of a motherboard with 1 beaglebone & lots of capes plugged in?
  • [00:48:26] <ds2> yep
  • [00:48:47] <ds2> that's why I also have to deal with a power situation
  • [00:49:04] <ds2> it'll support battery operation
  • [00:49:09] <emeb> no kidding.
  • [00:49:28] <ds2> there is enough power for WiFi OR a LCD OR USB
  • [00:49:31] <ds2> but not all 3
  • [00:50:08] <emeb> what will the dimensions be? (how many cape "slots"?)
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  • [00:55:09] <ds2> around 4x7
  • [00:56:47] <ds2> goal is to have it sized around a 7" LCD
  • [00:58:53] <emeb> So you can get ~3 boards ('bone + 2) on that?
  • [00:59:25] <ds2> it won't have free resources to do anything else
  • [00:59:36] <ds2> but everything is on there already ;)
  • [00:59:50] <ds2> what else would you want on there?
  • [01:00:12] <emeb> ??
  • [01:00:14] <ds2> there might be a few free GPIOs based on my allocation spreadsheet
  • [01:00:25] <emeb> maybe some sort of sensors, interfaces, etc/
  • [01:00:30] <ds2> sensors will be on there
  • [01:00:47] <ds2> what kind of interfaces?
  • [01:01:00] <emeb> nothing specific in mind...
  • [01:01:28] <ds2> I'd put a CODEC on there but I don't have enough pins available
  • [01:01:45] <ds2> goal is to support about 5 different screens
  • [01:02:08] <emeb> already picked out which 5?
  • [01:02:13] <ds2> yep
  • [01:02:35] <emeb> What's the mfg life of a typical LCD these days? Seems so short to me.
  • [01:02:51] <ds2> OLED (need to confirm with supplier), electronic paper, and 3 sizes of LCDs
  • [01:03:07] <ds2> donno, I am specing long life ones
  • [01:03:41] <emeb> E-ink. Does that use the same interface as LCD?
  • [01:03:45] <ds2> nope.
  • [01:03:53] <emeb> thought so.
  • [01:04:02] <ds2> I need to settle on a flavor of the electronic paper displays
  • [01:04:16] <ds2> some are SPI, others are nastier but can go through the LCD interface
  • [01:04:53] <emeb> makes sense.
  • [01:05:12] <emeb> accel/gyro/GPS?
  • [01:05:20] <ds2> yep + compass
  • [01:05:25] <ds2> + temp.
  • [01:05:31] <emeb> all the important stuff.
  • [01:06:32] <ds2> thought about slapping a FPGA on there but there are no good interfaces
  • [01:06:36] <ds2> and those things are a power hog
  • [01:06:55] <emeb> Can hang FPGA on SPI if you've got a chip sel free...
  • [01:07:39] <emeb> but if you don't have a specific need, why bother?
  • [01:08:03] <ds2> I don't think there is a pinmux option that would free the CS
  • [01:08:29] <ds2> if it was battery friendly, using one with a core on there can provide for an aux processor
  • [01:08:47] <ds2> might put a MSP430 on there for some tiny tasks
  • [01:08:56] <emeb> Most of the battery-friendly FPGAs are too small for much of a processor.
  • [01:09:42] <ds2> yep
  • [01:10:04] <ds2> or hard core but that leaves very few logic blocks
  • [01:10:34] <emeb> how about a Cortex Mx? Those are pretty good on power, cheap, and ARM like the main MCU.
  • [01:11:18] <ds2> putting a Cortex-M on there as an aux chip instead of a MSP430?
  • [01:11:39] <emeb> yeah
  • [01:12:37] <ds2> got a mfg in mind?
  • [01:12:45] <ds2> the stelleris are a bit big
  • [01:12:54] <emeb> I've been doing a lot with STM32 parts lately.
  • [01:13:17] <emeb> really inexpensive, good selection of peripherals.
  • [01:13:25] <ds2> do they have internal clocks?
  • [01:13:28] <emeb> yep
  • [01:13:48] <ds2> do they have cap sense libraries for all their chips? :D
  • [01:14:02] <emeb> No idea about that.
  • [01:15:01] <ds2> IIRC, the STM32 explorer kits won't let you reuse them as a programmer for your own boards whereas SpiBiWire will
  • [01:15:28] <emeb> News to me. I've been using their Discovery boards as programmers.
  • [01:15:56] <emeb> both the STM32F1xx and STM32F4xx Discovery boards have the SWD bus pinned out.
  • [01:16:53] <ds2> I need to look carefully at the one I got
  • [01:17:21] <ds2> if I can program them, then the only factor is cap sense libraries
  • [01:17:46] <ds2> well, there is the question of do I have footprint already or not. hard to argue with SOIC-16's ;)
  • [01:18:16] <emeb> true
  • [01:18:46] <ds2> all the STM32 leaded parts are QFP, right?
  • [01:21:26] <emeb> AFAIK
  • [01:21:59] <ds2> i suppose the other argument is the MSP430 tools are more mature
  • [01:22:26] <emeb> I just use GCC + make. Mature enough for you?
  • [01:22:38] <ds2> no, programmer tools
  • [01:22:55] <emeb> Ah.
  • [01:23:03] <ds2> I will not use IAR. that stuff is miserable
  • [01:23:21] <emeb> The OSS tools for STM32 programming are a bit rough.
  • [01:23:31] <emeb> Their WinXX programming tool is fine though.
  • [01:23:53] <ds2> whereas the MSP430 stuff is - mspdebug rf2500; prog foo.elf
  • [01:23:55] <ds2> and I am done
  • [01:24:08] <emeb> Nice
  • [01:24:20] <emeb> MSP430 is a 16-bit machine, no?
  • [01:24:25] <ds2> but let me see if I can get the board layed out first before worrying about aux processors
  • [01:24:28] <ds2> yeah, it is 16bit
  • [01:24:35] <ds2> but I been happy with using them in a design
  • [01:24:39] <emeb> Good enough for the task at hand.
  • [01:26:09] <emeb> Plus, not seeing any capsense stuff for STM32.
  • [01:26:21] <emeb> all seems to require external interface chips.
  • [01:26:45] <ds2> they are easy enough to wire in if there is demand
  • [01:27:03] <ds2> I do wish there was a more mature I2C slave library for the MSP430
  • [01:27:45] <emeb> I2C stuff always seems a bit raw to me.
  • [01:28:03] <emeb> more of the protocol handled in code vs SPI.
  • [01:28:37] <ds2> yes, I'd expect that... SPI is a shift register
  • [01:28:46] <ds2> if it requires handling in SW, I might as well bit bang it
  • [01:29:02] <emeb> true enough.
  • [01:29:34] <ds2> a working I2C slave mode would cut down my need for pins
  • [01:29:51] <ds2> OTH, mapping GPIOs lets me get away with GPIO keys ;)
  • [01:30:23] <emeb> but if you freed up some GPIOs you might be able to afford a real codec. :P
  • [01:30:32] <ds2> no chance
  • [01:30:36] <emeb> heh
  • [01:30:43] <ds2> the MCASP pins are needed in other modes
  • [01:30:50] <emeb> ah
  • [01:31:03] <ds2> have a spreadsheet of it already
  • [01:31:52] <emeb> A matter of priority. Good codec is top priority for my app.
  • [01:32:25] <emeb> Any experience with using the Linux kernel rotary encoder driver through GPIO?
  • [01:32:37] <emeb> I may need to do that 8x.
  • [01:39:02] <ds2> nope
  • [01:39:14] <ds2> I am curious as to how fast it will work at
  • [01:44:50] <emeb> last time I looked at it, it seemed to be IRQ driven -
  • [01:45:01] <emeb> needs interrupts on every pin it uses...
  • [01:46:56] <emeb> (hmm... better check if AM33xx provides interrupts on arbitrary GPIO)
  • [01:47:21] <ds2> it does but it has a rule about 1 interrupt per bank
  • [01:47:50] <emeb> hmmm - so you have to poll from the bank to find out which pin I suppose...
  • [01:48:17] <emeb> (digs around in TRM...)
  • [01:48:55] <ds2> I think the Linux code takes care of it (I think, check)
  • [01:51:29] <emeb> that would be nice, but need to make sure.
  • [01:56:57] <ds2> I am guessing it won't be a popular thing to require people to remove the pesky RJ45 ;)
  • [01:57:13] <emeb> That would probably be a showstopper.
  • [01:57:34] <ds2> I hate the idea of having to do mouse bites to accomodate the RJ45
  • [01:57:47] <emeb> It's a nuisance.
  • [01:58:14] <emeb> When doing my board layout it seemed like the slot given in the recommended outline wasn't quite big enough either.
  • [01:58:38] <ds2> I am not going with recommendations. I am going with board measurements and my 3D models :D
  • [01:58:43] <emeb> I backed off another 0.025" on the lower edge.
  • [01:59:02] <ds2> there are quite a few untennable things on the recommendations
  • [01:59:09] <ds2> like eatting up all the I2C EEPROM address space
  • [01:59:32] <emeb> Let's just say that I made use of the digital calipers and leave it at that. :)
  • [01:59:43] <ds2> hehe
  • [01:59:49] <ds2> no CMM handy?
  • [01:59:58] <emeb> CMM?
  • [02:00:49] <emeb> coordinate measuring machine...
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  • [02:00:54] <emeb> nope.
  • [02:00:55] <ds2> yep
  • [02:01:10] <ds2> this is why we need a working PicoDLP based scanner
  • [02:01:18] <emeb> That would be fun.
  • [02:01:33] <emeb> might not be great resolution tho.
  • [02:01:51] <ds2> better then nothing
  • [02:01:54] <Alistair> I'm looking at a simple laser scanner for a future bone project
  • [02:02:10] <ds2> Alistair: what's the scanner for?
  • [02:02:20] <ds2> bar code? digitizing?
  • [02:02:25] <ds2> blinding an opponent? :D
  • [02:02:31] <Alistair> ds2: At the moment general scanning of 3D objects
  • [02:02:42] <ds2> Oh nice
  • [02:02:47] <ds2> what are you using as the readback sensor?
  • [02:03:56] <Alistair> ds2: looking to use a camera sensor, after studying it looks like a low-speed interface is possible on the PRU, with instruction perfect code possibly could handle upto 9mp
  • [02:04:12] <ds2> Nice.
  • [02:04:21] <ds2> got a source for the 9MP sensor?
  • [02:05:31] <Alistair> ds2: I have access to a reseller for an omnivision 9mp sensor and have the docs (signed the NDA!), haven't purchased yet, going to test lower speed using an xmega first just to prove the concept
  • [02:06:08] <ds2> Alistair: is this a personal project?
  • [02:06:24] <Alistair> ds2: I'm considering using a mono sensor however, looking at comercial projects like NextEngine they've gone for this for high quality stills and improved quality laser tracking
  • [02:06:59] <ds2> so you are going to use the dots for tracking/orienting?
  • [02:07:00] <Alistair> ds2: yes, though I can likely get backing to make more of it once concept is proven
  • [02:07:13] <emeb> sounds pretty serious.
  • [02:07:57] <emeb> how do you steer the beam?
  • [02:08:40] <Alistair> it'll be a line laser, if you know the properties of the lens, fixed distance scanning for centre point then it's not too difficult to generate point data, so it's not going to be a free handheld style scanner though there are approaches I could look into after step one
  • [02:09:49] <ds2> does this mean you don't have to do the dots?
  • [02:10:09] <Alistair> it's easier than it sounds, to be honest you could whack one together in a couple of days on a PC but I'm looking at a solution that's standalone networked whilst remaining affordable and a little more fine tuned than a typical hobbyist project, but it's early days
  • [02:10:29] <ds2> it is all trig
  • [02:10:40] <ds2> at least for the completely fixed versions
  • [02:11:17] <Alistair> so I'm spending most of my time focusing on how to get motors driving from the bone + camera direct into bone to reduce component count as step one but early days
  • [02:11:44] <ds2> Steppers?
  • [02:12:02] <Alistair> ds2: initially, yes
  • [02:12:07] <Alistair> ds2: may prove good enough
  • [02:12:26] <ds2> you can generate the wave with a shell script
  • [02:12:42] <ds2> use big resistor/diode/transistors for the driver if you want to be crude
  • [02:13:18] <emeb> ka6sox is working on an FPGA design to drive steppers from a Beagle for a 3D printer. FPGA handles linear slewing in 3D.
  • [02:13:54] <Alistair> aye I'll be interested, another project I'm looking into is an interesting take on affordable 3D sintering
  • [02:13:59] <Alistair> but again, early days :P
  • [02:14:28] <ds2> unless you are doing high speed stepping, chopper is overkill
  • [02:14:31] <Alistair> only got my bone a few days ago, still trying to get the dev tools side all working smoothly so I can get cracking
  • [02:14:52] <emeb> aye
  • [02:14:53] <A2Sheds> affordable 3D sintering... like with a hair dryer??
  • [02:14:59] <Alistair> hahaha
  • [02:15:03] <emeb> hot glue.
  • [02:16:19] <A2Sheds> emb: somebody has RTAI and EMC working with a s3c2440 board
  • [02:16:25] <Alistair> step 1 for me is camera interface on PRU, I'll test first with signal from an xmega, if it works I'll see how far I can push with real sensor, I'll prove concept with i2c to arduino + motor shield for motor driving then if that works I'll look at cooking something up for driving a stepper direct from bone
  • [02:16:26] <A2Sheds> emeb sorry
  • [02:17:11] <A2Sheds> emeb: http://code.google.com/p/miniemc2/ just FYI
  • [02:18:31] <A2Sheds> is there any working RTAI patch for any beagle? I know somebody worked on RTAI and EMC for the original beagleboard a couple of years ago
  • [02:18:55] <A2Sheds> they had issues with the GPIO hardware however
  • [02:20:35] <emeb> aha - mini2440. I've done some work with that.
  • [02:23:15] <Alistair> I'm lucky for projects I have access to a HP Designjet 3D printer and an industrial miller, things that are still too expensive are scanners and lasers so that's why I'm looking into cheap designs :P
  • [02:24:00] <Alistair> ok I really am confussed, are there any other tasks other than meta-toolchain I should be running for a full SDK?
  • [02:27:40] <jacekowski> i've seen new 3d scanner
  • [02:27:41] <jacekowski> somewhere
  • [02:27:45] <jacekowski> cheap 3d scanner
  • [02:28:10] <jacekowski> made by hp i think
  • [02:28:19] <jacekowski> just camera on movable arm + bit of software
  • [02:28:50] <jacekowski> hp topshot
  • [02:31:02] <Alistair> that's just to capture 2d images of 3d objects I think AKA a camera
  • [02:31:11] <Alistair> no 3d data as such
  • [02:31:37] <Alistair> something comparible to what I'm looking at is http://www.nextengine.com/
  • [02:32:16] <Alistair> this Angstrom SDK business is driving me bonkers, I just can't get an environment script that includes setup of opkg
  • [02:35:53] <Alistair> right must head off! Good chatting, see you guys
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  • [03:13:59] <ds2> generating a point cloud is pretty easy. lots of trig
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  • [03:39:18] <Phosphate> has anyont tried an opkg update/upgrade on a beaglebone?
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  • [03:57:45] <ds2> ~.
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  • [04:15:08] <jkridner> koen: capital names are from the schematic.
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  • [04:20:11] <smithw101> Phosphate: I started by building the cloud9 image, but it fails on nodejs-native (building on 64-bit Ubuntu), I haven't been able to resolve it as yet
  • [04:20:22] <smithw101> Have not tried opkg
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  • [05:28:17] <emeb_mac> ka6sox: ping
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  • [05:48:33] <ka6sox> emeb_mac, pong
  • [05:48:50] <emeb_mac> got the board hooked up?
  • [05:49:03] <ka6sox> yes, I do.
  • [05:49:06] <emeb_mac> kewl
  • [05:49:19] <ka6sox> I am using SPI to talk to it.
  • [05:49:28] <emeb_mac> That's the way to do it.
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  • [05:49:47] <emeb_mac> Did you grab the userspace driver code from my git?
  • [05:49:50] <ka6sox> yes, the PRU should be able to push that thing @ 5Mbps just fine
  • [05:49:59] <ka6sox> I lost that link...need to find it again.
  • [05:50:08] <emeb_mac> lemme get that for you...
  • [05:50:20] <ka6sox> (not on github...gitorious?
  • [05:50:43] <ka6sox> )
  • [05:51:22] <emeb_mac> http://gitorious.org/bfpga_lib
  • [05:51:46] <ka6sox> kewl...okay I will snag that now
  • [05:52:14] <ka6sox> eventually I hope to hook up to the emc2 RT API and use the PRU to send data to the FPGA.
  • [05:52:24] <emeb_mac> You'll want bfpga_lib, not bfpga2_lib which is for the newer design...
  • [05:52:33] <ka6sox> got it.
  • [05:53:19] <emeb_mac> PRU + FPGA should be interesting
  • [05:53:36] <ka6sox> it should be fast and dependable.
  • [05:53:59] <emeb_mac> Is EDMA still missing from the kernel?
  • [05:54:10] <ka6sox> looks like someone is working on that bit now.
  • [05:54:14] <emeb_mac> nice
  • [05:54:17] <ka6sox> haven't seen UIO yet
  • [05:54:57] <emeb_mac> I tried to build the oe angstrom cloud9 image this afternoon but it failed. Don't know enough about oe to figure out why.
  • [05:55:12] <ka6sox> edma would make this pretty nice setup...setup a ring buffer and move the pointer around.
  • [05:55:39] <emeb_mac> something about the autotools referencing the host machine during configure in swig...
  • [05:55:39] <ka6sox> the PRU should be able to just use it.
  • [05:55:58] <ka6sox> ugh...autotools and cross dev...bleh
  • [05:56:13] <emeb_mac> sounds like a koen question...
  • [05:56:30] <ka6sox> yes, it is
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  • [05:56:54] <emeb_mac> anyway, what I really need is the kernel and that appears to have built OK
  • [05:57:08] <ka6sox> I should head home and download the 140 Macro shots I did today.
  • [05:57:12] <emeb_mac> gotta disable the cleanup phase and rebuild
  • [05:57:22] <emeb_mac> Still at work? dedicated.
  • [05:57:26] <ka6sox> but I am having too much fun with adding new functionality
  • [05:57:43] <ka6sox> I just stopped by here to pick up the C4 and FPGA board + another PS
  • [05:58:00] <emeb_mac> cool - have fun w/ that.
  • [05:58:26] <ka6sox> I just put all 5.5GB of Xilinx stuff on the netbook and will take that with me.
  • [05:58:44] <ka6sox> also the pod.
  • [05:59:16] <emeb_mac> handy for debug
  • [05:59:43] <ka6sox> ya, when it doesnt' blinky the light right or something
  • [06:01:51] <ka6sox> I have to make it modular to slip in the NURBS to Steps converters (4)
  • [06:02:46] <emeb_mac> Ah - the 3D driver stuff?
  • [06:03:04] <ka6sox> yes
  • [06:03:29] <emeb_mac> will you be able to do your project with the Beagleboard + FPGA board I sent you?
  • [06:03:58] <emeb_mac> looks like the Beaglebone FPGA board may be delayed a bit longer than your timeline...
  • [06:05:02] <ka6sox> yes, but I can work on it with a "slower" system and see how resilient it is.
  • [06:05:12] <ka6sox> (slower I/O)
  • [06:06:03] <ka6sox> I am presenting a paper @ SCaLE on RT in linux for use in CNC stuffs.
  • [06:06:21] <emeb_mac> ok. we're trying to get it going, but there have been a few board hiccups.
  • [06:06:30] <ka6sox> problem is that the last real good RT mod was in 2.6.26
  • [06:06:34] <emeb_mac> on the upside all the parts are in.
  • [06:06:39] <ka6sox> :D
  • [06:06:54] <emeb_mac> ah - RT patches not working on 3.1 I suppose
  • [06:07:21] <ka6sox> I was building it for 3.1 but it didn't build...haven't had time to fix it yet.
  • [06:07:27] <ka6sox> using PREEMPT_RT
  • [06:07:43] <emeb_mac> Sounds like a fun bit of debugging ahead.
  • [06:07:51] <ka6sox> using that on x86 it wasn't good at all....
  • [06:07:55] <ka6sox> too much jitter.
  • [06:08:24] <ka6sox> good enough for Stock Quotes...not good enough for .1mm prints.
  • [06:08:39] <emeb_mac> Stock Quotes. meh.
  • [06:09:03] <ka6sox> so that means Hardware Assist
  • [06:09:14] <emeb_mac> and thus FPGA...
  • [06:10:05] <ka6sox> ya, might see if PRU is able to use the GPIO well enough to create a way to synthesize a EPP port (several)
  • [06:11:08] <emeb_mac> PRU sounds like an interesting gizmo
  • [06:11:31] <ka6sox> that way I can make the Bone directly control the GPIO pins and get Step/Dir info for everything directly
  • [06:11:42] <ka6sox> s/for/to
  • [06:11:56] <emeb_mac> sounds workable
  • [06:12:49] <ka6sox> I need to create some timing bits to make it work slow enough
  • [06:13:00] <ka6sox> but precisely on time.
  • [06:14:25] <ka6sox> someone suggested earlier that the PRU be used to interpret gcode...but it really doesn't have any text processing stuff.
  • [06:14:35] <ka6sox> (well I guess you could contort it to do that)
  • [06:14:43] <emeb_mac> I saw some discussion about that.
  • [06:15:14] <emeb_mac> Maybe if you tokenize the gcode and hand it to the PRU?
  • [06:15:25] <ka6sox> gcode is already tokenized.
  • [06:15:29] <emeb_mac> at least eliminate the text processing.
  • [06:15:39] <ka6sox> just strip out the M#
  • [06:15:47] <ka6sox> but it shouldn't have to do that.
  • [06:15:53] <ka6sox> the Bone can handle all that itself.
  • [06:16:01] <ka6sox> emc2 can do a fine job.
  • [06:16:45] <ka6sox> hence the mod to the RT API code to use the PRU + GPIO
  • [06:17:30] <ka6sox> problem is that they currently use RTAI which doesnt' work on A8 or in kernels past 2.6.26
  • [06:17:44] <emeb_mac> well - gotta go afk for a while. Let me know if you have any questions re fpga stuff.
  • [06:18:06] <ka6sox> tyvm....will do so
  • [06:18:08] <ka6sox> heading home
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  • [07:59:19] <snowrichard> hi
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  • [09:54:28] <aholler> /
  • [09:56:48] <_av500_> \
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  • [10:10:47] <dm8tbr> _
  • [10:15:25] <koen> http://www.flickr.com/photos/koenkooi/6563461589
  • [10:15:39] * koen wonders if he should add async setting of the pins or not
  • [10:17:17] <aholler> first add a search function
  • [10:18:20] <aholler> and a reset-to-default button
  • [10:19:38] <koen> burst-into-fire button
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  • [10:38:47] <ka6sox> "what does this button do"
  • [10:40:17] <aholler> changing those vdd-pins ;)
  • [10:41:11] <aholler> hmm, btw. I'm missing the 1.8. ;)
  • [10:41:40] <koen> VDD_ADC is 1.8V :)
  • [10:42:43] <aholler> ah, ok.
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  • [10:46:43] <_av500_> koen: add HCL
  • [10:46:47] <_av500_> er, HCF
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  • [11:41:38] <jacekowski> there is HGF as well
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  • [12:24:47] <tom__> hey guys
  • [12:25:05] <tom__> anyone here able to help me figure out why i've been banned from the google group?
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  • [14:58:28] <ngurus> hello
  • [14:58:46] <ngurus> Can anyone help with a few queries regarding beagle board?
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  • [15:09:37] <dm8tbr> only if you actually ask them
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  • [15:11:32] <ngurus> Can we run Thirdy party applications in a Beagle Board?
  • [15:12:06] <dm8tbr> sure, it can run ordinary linux distributions
  • [15:12:55] <ngurus> Am a newbie over here, can it run all apps suported by Linux?
  • [15:13:27] <dm8tbr> as long as they compile for ARMv7, yes
  • [15:14:33] <ngurus> Thanks for helping me out! Really appreciate it!
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  • [16:05:40] <rlmccormick> anyone here have any luck with any specific usb wifi dongles?
  • [16:07:01] <rlmccormick> anyone here have any luck with any specific usb wifi dongles?
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  • [16:34:22] <rlmccormick> /join #beagle
  • [16:34:26] <rlmccormick> oops
  • [16:34:48] <dsoto> what angstrom package do i need to install to use fdti devices on a beagle bone?
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  • [16:35:35] <rlmccormick> hi all, anyone here have any success with any specific usb wifi dongles?
  • [16:35:37] <dsoto> i'm trying to connect the beaglebone to a sparkfun gprs module
  • [16:36:35] <rlmccormick> what kind of interface is on that?
  • [16:40:59] <smithw101> emeb_mac: I saw last night you said your cloud9 build failed ??? what was the error?
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  • [16:49:14] <emeb_mac> smithw101: I don't have the specific error handy, but while building swig it complained that autoconf was referencing the local environment.
  • [16:49:49] <smithw101> Ok, not the error I got stuck at (nodejs-native).
  • [16:50:25] <smithw101> What platform are you building on?
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  • [16:57:03] <emeb> smithw101: (changing machines)
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  • [16:57:26] <smithw101> emeb: ok
  • [16:57:31] <emeb> I'm building on a Fedora 13 x86_64 box
  • [16:58:13] <smithw101> I'm building on Ubuntu 11.10 x64 VM
  • [16:58:40] <smithw101> I was able to build systemd without a problem, although the image seemed to be missing stuff when I tried to boot it
  • [16:59:14] <smithw101> It did boot, but there were a number of errors and things like networking had to be configured manually
  • [17:00:26] <emeb> Specific error I got was this:
  • [17:01:40] <emeb> http://pastebin.ca/2096169
  • [17:03:12] <emeb> koen: ping
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  • [17:18:53] <dsoto> hi, i'm having ethernet issues on beagle bone
  • [17:19:08] <dsoto> everything was working and then when i plugged in a USB device it stopped
  • [17:19:11] <dsoto> now i get
  • [17:19:12] <dsoto> ping: sendto: Network is unreachable
  • [17:19:26] <dsoto> any hints on how to restart services?
  • [17:19:52] <dsoto> i've tried a hardware restart but can't ping anything after restart
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  • [17:20:26] <dsoto> i can ping 127.0.0.1
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  • [17:26:59] <dsoto> nevermind, /etc/init.d/networking restart did the trick
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  • [17:49:02] <dsoto> can anyone help me find the right package to get python serial working?
  • [17:49:37] <dsoto> on my beaglebone i get
  • [17:49:40] <dsoto> Unknown package 'python-pyserial'.
  • [17:49:45] <dsoto> also
  • [17:49:57] <dsoto> Unknown package 'python-setuptools'.
  • [17:50:15] <dsoto> i have installed both of these on my xm/angstrom
  • [17:50:31] <dsoto> why is my bone/angstrom behaving differently?
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  • [18:03:44] <koen> emeb: rm /opt/oe_bone/setup-scripts/build/tmp-angstrom_2010_x-eglibc/work/armv7a-angstrom-linux-gnueabi/swig-2.0.0-r0.0/swig-2.0.0/config.log as a work around
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  • [18:11:27] <emeb> koen: thanks - I'll try it
  • [18:13:09] <koen> emeb: I haven't seen that error myself yet on debian obsolete and fedora 16
  • [18:14:11] <emeb> too much distro diverstity
  • [18:14:37] <dsoto> koen: i saw your name in some old threads on pyserial, have you known anyone to install it on a beaglebone?
  • [18:16:14] <emeb> koen: after removing the config.log, just rerun bitbake cloud9-image? Did that and it still bombs out.
  • [18:18:41] <koen> emeb: on the same place?
  • [18:18:49] <emeb> yep
  • [18:19:52] <koen> emeb: ok, comment out source/openembedded-core/meta/classes/insane.bbclass:607:do_configure[postfuncs] += "do_qa_configure "
  • [18:20:11] <koen> the big hammer approach
  • [18:20:26] <anduck> soo uhh
  • [18:20:28] <emeb> koen: heh...
  • [18:20:32] <anduck> when do beaglebones ship?
  • [18:20:46] <koen> but if you just want the kernel, bitbake virtual/kernel doesn't need swig
  • [18:20:47] <anduck> anyone knows?
  • [18:21:12] <emeb> koen: yes - already got the kernel built w/o rm_work.
  • [18:21:25] <koen> emeb: for an up to date image: http://dominion.thruhere.net/koen/angstrom/beaglebone/Angstrom-Cloud9-IDE-eglibc-ipk-v2011.12-core-beaglebone-2011.12.22.img.gz
  • [18:21:27] <dsoto> anduck: do you mean for the first time? i already bought two
  • [18:21:29] <emeb> just wanted to try the whole deal first
  • [18:21:38] <emeb> koen: thanks for linky.
  • [18:22:10] <koen> emeb: that dir will have a new image every day, we're preparing an update for CCO next week
  • [18:22:20] <emeb> koen: kewl
  • [18:22:38] <dsoto> anduck: but they are out of stock right now. digikey has a ship date estimate of 1/31/2012
  • [18:23:43] <prpplague> koen: i await your +1
  • [18:23:57] <koen> prpplague: already did
  • [18:25:01] <prpplague> koen: hehe
  • [18:26:00] <koen> dsoto: python-pyserial is on its way to the feeds, should hit all the mirrors in ~3 hours
  • [18:26:40] <ka6sox-away> yay! (I need that one)
  • [18:27:08] <koen> setuptools as well
  • [18:27:35] <emeb> koen: that fixed swig.
  • [18:28:17] <emeb> Oy - now getting: ERROR: Function 'Fetcher failure for URL: 'http://download.gnome.org/sources/gtk+/2.24/gtk+-2.24.8.tar.bz2'. Checksum mismatch!
  • [18:29:25] <koen> rm sources/downloads/gtk+* and retry
  • [18:30:01] <koen> dsoto, ka6sox-away: if you're in a hurry, change the url in /etc/opkg/python-feed.conf to eu.feeds.. and opkg update
  • [18:30:28] <dsoto> koen: brilliant. thanks for the great info.
  • [18:30:33] <koen> anyway, frodo just got stabbed, so I'm going to pay attention to that now
  • [18:30:43] <ka6sox-away> koen, naw...I can wait till it gets here...thats a tonight thing.
  • [18:30:54] <emeb> koen: off to the races. Thanks.
  • [18:32:15] <anduck> umm
  • [18:32:42] <anduck> well tigal had ship date at 1/9/12 but now it's 1/31/12 :E
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  • [19:00:15] <tlab> anyone gotten the beaglebone to network thru the usb cable?
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  • [20:55:32] <dsoto> anyone know where to point opkg to install emacs on a beaglebone?
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