**** BEGIN LOGGING AT Sat May 23 02:59:58 2015
May 23 02:59:59 <zmatt> zumba_addict: depends on the usb port
May 23 03:00:03 <zumba_addict> k
May 23 03:00:09 <zmatt> and what else your system is doing
May 23 03:00:34 <zumba_addict> i'll find a 5vdc psu then
May 23 03:00:59 <zumba_addict> I think i have, from a Linksys router
May 23 03:01:11 <zmatt> eth is ~100 mA with heavy traffic
May 23 03:01:25 <zmatt> (rough estimate, not measured)
May 23 03:01:41 <zmatt> oh wait, I actually do have measurements somewhere now
May 23 03:01:53 <zmatt> but that would mean looking it up, and I'm lazy
May 23 03:01:56 <zumba_addict> found it but I cut the connector
May 23 03:02:15 <zumba_addict> i cut it because I used it for my arduino last year
May 23 03:02:30 <zumba_addict> i guess, i should just buy a new one, lol
May 23 03:03:38 <zmatt> the blue power led actually also seems to draw quite a bit of current... lol
May 23 03:04:54 <zmatt> (I'm currently taking some more scope pics of power-up/down sequencing, this time including current measurement)
May 23 03:06:04 <zumba_addict> btw, I built a device that controls a camera slider and my camera using arduino. How hard would it be if I use bbb to mimic what I built?
May 23 03:08:21 <veremit> quite hard :P
May 23 03:08:31 <veremit> just i2c the arduino from the beagle
May 23 03:19:56 <zumba_addict> just got back, had to help wife
May 23 03:20:26 <zumba_addict> k
May 23 03:29:24 <methuzla> zumba_addict what is the hardware driving the slider? and how do you control the camera?
May 23 03:37:04 <zumba_addict> just got back
May 23 03:37:10 <zumba_addict> it's an arduino
May 23 03:37:24 <zumba_addict> i used stepper motor nema 17
May 23 03:38:29 <methuzla> steppers driven with what?
May 23 03:38:49 <zumba_addict> with drv8825
May 23 03:38:57 <zumba_addict> polulu drv8825
May 23 03:39:10 <zumba_addict> which is connected to the arduino
May 23 03:39:23 <zumba_addict> drv8825 is a stepper motor driver
May 23 03:40:14 <methuzla> *pololu
May 23 03:40:26 <zumba_addict> yup, forgot the spelling, it's been a while
May 23 03:48:26 <methuzla> i2c to arduino, or control it straight from beagle, just needs some logic pins for step and dir
May 23 03:49:12 <methuzla> what the camera? how do you control it?
May 23 03:55:19 <k-man> ji
May 23 03:55:22 <k-man> hi even
May 23 03:55:42 <k-man> is there a possible issue with the onboard flash wearing out if i run debian on it?
May 23 03:55:46 <k-man> on a bbb?
May 23 03:56:44 <zumba_addict> oh ok
May 23 03:56:51 <zumba_addict> for the camera, I use 4n35 chip
May 23 03:57:01 <zumba_addict> it's a simple switch
May 23 03:57:45 <zumba_addict> on my canon camera, there are 2 pins for triggering the camera. When shorted, it will make a shot
May 23 03:58:01 <zumba_addict> so when 4n35 shorts it, it will trigger it
May 23 03:58:06 <methuzla> could also drive that from the beagle
May 23 03:58:13 <zumba_addict> nice
May 23 03:58:21 <methuzla> so you could rehost all that camera slider stuff
May 23 03:58:23 <zumba_addict> so via i2c? I'm not familiar with it
May 23 03:58:27 <zumba_addict> nice
May 23 03:58:44 <zumba_addict> so no more need for the arduino?
May 23 03:58:53 <methuzla> i2c if you want to talk to the arduino, which already doing all this
May 23 03:59:05 <zumba_addict> what if i want to get rid of arduino?
May 23 04:00:05 <methuzla> you could, given what you're trying to do, but keep it around
May 23 04:00:10 <zumba_addict> k
May 23 04:00:49 <methuzla> looks like 2 (maybe 4) logic pins for the stepper motor, and 1 for the camera
May 23 04:01:08 <methuzla> no hard timing requirements
May 23 04:01:23 <vagrantc> k-man: nothing lasts forever, but odds are you would have to work pretty hard to wear out the flash.
May 23 04:01:41 <zumba_addict> k
May 23 04:02:01 <zumba_addict> i'll have to buy the bbb soon so I can start studying it :D
May 23 04:03:13 <methuzla> and now you can set up some kind of network interface and run it all from a smart phone, etc.
May 23 04:03:33 <zumba_addict> sweet
May 23 04:04:10 <zumba_addict> question about this,  looks like 2 (maybe 4) logic pins for the stepper motor
May 23 04:04:19 <zumba_addict> is that something i need to buy?
May 23 04:04:30 <methuzla> no
May 23 04:04:34 <zumba_addict> oh, wow, nice!
May 23 04:05:21 <zumba_addict> and is the code easy to write?
May 23 04:05:32 <zumba_addict> is it going to be in C language?
May 23 04:05:32 <methuzla> that's just basic gpio like HIGH / LOW, of which the beagle has plenty available
May 23 04:05:48 <zumba_addict> nice!
May 23 04:07:00 <zumba_addict> thanks for the info :) really appreciate it
May 23 04:07:40 <zumba_addict> btw, how is the performance of bbb when playing 1080 movie files or streams?
May 23 04:13:40 <zumba_addict> found my answer :)
May 23 04:14:01 <k-man> vagrantc, ok thanks
May 23 04:28:07 <zumba_addict> folks, i'm about to purchase it, this is the correct one right? http://www.amazon.com/Beagleboard-BEAGLBONE_BLACK-BeagleBone-Rev-C/dp/B00K7EEX2U/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1432355128&sr=1-1-catcorr&keywords=beaglebone+black
May 23 04:33:31 <methuzla> list price $149.99????
May 23 04:34:05 <zumba_addict> but it's currenlty $53
May 23 04:34:11 <zumba_addict> the other one is $52
May 23 04:34:17 <zumba_addict> free shipping
May 23 04:35:24 <zumba_addict> the seller in Amazon is MemoryWhiz and has 2 ads for beaglebone black. However, their other listing is cheaper by $1. Not sure why
May 23 04:35:49 <zumba_addict> this is the other one, http://www.amazon.com/BeagleBone-Black-Single-Computer-Development/dp/B00LC1924G/ref=sr_1_3?s=electronics&ie=UTF8&qid=1432355555&sr=1-3&keywords=beaglebone+black
May 23 04:35:58 <methuzla> because they are selling antistatic bags and usb cables in cardboard boxes?
May 23 04:36:45 <zumba_addict> ah, maybe that could be it
May 23 04:37:09 <methuzla> this is it: http://beagleboard.org/black
May 23 04:37:32 <zumba_addict> k
May 23 04:37:45 <methuzla> a rev c should be in the neighborhood of $53
May 23 04:37:59 <zumba_addict> got it, so the one in amazon is correct
May 23 04:38:00 <methuzla> who you trust to give that $53 to is up to you
May 23 04:38:08 <zumba_addict> yup
May 23 04:38:15 <zumba_addict> i never had issues with Amazon
May 23 04:38:24 <zumba_addict> plus i have a $30 gift card
May 23 04:38:44 <methuzla> ever ask them where they get there list price?
May 23 04:38:49 <methuzla> *their
May 23 04:38:55 <zumba_addict> no
May 23 04:39:55 <zumba_addict> ah, the first link says By BeagleBoard. The second link is from a different provider
May 23 04:40:06 <zumba_addict> by EleDuino
May 23 04:40:26 <zumba_addict> i'll purchase it now :)
May 23 04:46:48 <KeatonT> Hello all.
May 23 04:46:51 <KeatonT> What's up?
May 23 04:58:33 <zumba_addict> Woohoo, I'm now a beaglebone black owner :D
May 23 04:59:46 <zumba_addict> ok folks, taking a rest now. Have a great evening
May 23 04:59:50 <zumba_addict> thank you methuzla
May 23 05:00:56 <methuzla> well, have fun, hope it works for you
May 23 05:01:32 <methuzla> and congrats on saving like $96 off the list price
May 23 05:02:12 <KeatonT> Anyone own an iRobot vacuum?
May 23 05:58:26 <zmatt> nice, smooth transition... (5V supply cut while on battery power) -> http://gerbil.xs4all.nl/bbb-pmic/2015-05-23-071624.png
May 23 05:59:02 <zmatt> (top to bottom: SYS, regulated 3.3V and 1.8V, current consumption on 5V supply)
May 23 07:24:26 <mcan> how can i calculate initrd size address for kernel paramater example: initrd=0x62000000,0x00800000
May 23 07:44:18 <orangeclock222> where buy in Kowloon?
May 23 08:08:51 * KotH thought kowloon had been erased in '93
May 23 08:25:31 <_av500_> parts of it
May 23 16:13:42 <zmatt> ds2: I thought I'd finally put some effort in making a wiki page to collect the many observations I've done on BBB power management
May 23 16:13:57 <zmatt> elinux wiki doesn't allow me to create a page :/
May 23 16:37:57 <imanpakii> hi my BBB dosen't work on my debian virtual box by ssh root@192.168.7.2
May 23 16:38:26 <imanpakii> I added the usb to my Virtual Box but still not working
May 23 17:32:43 <ocamlman> Hello! I'm looking for a Cape board layout (just for the dimensions, pins, etc and I'll add my own circuits). I found some Adafruit ones that are licensed under CC but I'm afraid to use them since I don't know how that license applies to hardware should I choose to manufacture and distribute my Capes. Is there a free (as in freedom and beer) template I can use?
May 23 17:44:18 <wmat> ocamlman: grab a proto cape and copy it perhaps
May 23 17:45:14 <ocamlman> wmat, the protocape is licensed under CC: https://github.com/adafruit/Adafruit-BeagleBone-ProtoBoard
May 23 17:55:16 <wmat> ocamlman: http://elinux.org/CircuitCo:Generic_Proto_Cape#Documentations
May 23 17:56:41 <ocamlman> wmat, The bottom of the page says "Content is available under a Creative Commons Attribution-ShareAlike 3.0 Unported License unless otherwise noted." -- do you know if that applies to those files?
May 23 17:57:16 <wmat> ocamlman: it applies to wiki content unless otherwise stated
May 23 17:57:41 <ocamlman> wmat, but not those files?
May 23 17:57:54 <wmat> ocamlman: if you email the beagle list, gerald will be able to tell you the licensing for sure
May 23 17:58:10 <ocamlman> wmat, I will do so. Thanks!
May 23 17:58:36 <wmat> ocamlman: np
May 23 18:07:58 <KotH> wmat: shouldnt you be sorry?
May 23 18:11:28 <wmat> KotH: eh?
May 23 18:13:12 <KotH> wmat: exactly!
May 23 18:13:39 <wmat> heh
May 23 19:07:04 <GenTooMan> I think we are all sorry now.
May 23 19:14:10 <zmatt> so, who has the authoritah to let me create an elinux wiki page on BeagleBone Power Management ?
May 23 19:15:18 <zmatt> since it had been suggested that would be a good place to document my findings
May 23 19:16:50 <GenTooMan> not I said the little peon
May 23 19:17:25 <veremit> its a wiki .. surely you just sign up & go ..
May 23 19:17:55 <GenTooMan> well you need a login / user account last I checked
May 23 19:19:01 <GenTooMan> also ... seems the highest bandwidth on the BBB is via USB2 is that true?
May 23 19:19:38 <zmatt> veremit: even when logged in it says I'm not allowed to create the page
May 23 19:20:27 <veremit> GenTooMan .. possibly.
May 23 19:20:34 <veremit> hdmi probably higher just
May 23 19:20:46 <veremit> zmatt . . Oh.
May 23 19:20:51 <zmatt> GenTooMan: depends on purpose
May 23 19:21:21 <zmatt> GenTooMan: also, whether you mean in theory or in practice
May 23 19:21:25 <zmatt> ;)
May 23 19:21:53 <zmatt> getting the max bandwidth out of USB is going to be a lot harder than getting the max bandwidth out of Ethernet
May 23 19:21:58 <GenTooMan> Well the best I can see is about 40mbs which I guess is OK but when you are sampling fast singles or high BW signals oh well.
May 23 19:22:12 <zmatt> especially since USB DMA is buggy to the point of unusability
May 23 19:23:02 <zmatt> maxing out ethernet should be easily doable... if it's not then someone really screwed up somewhere
May 23 19:24:15 <veremit> zmatt .. start at http://elinux.org/eLinux.org:Site_support .. you might need to mail the mailing list
May 23 19:26:31 <GenTooMan> buggy usb ... crap. Ethernet isn't good as it will max at 8mbs
May 23 19:27:59 <veremit> why 8? thats pathetic
May 23 19:28:13 <veremit> oh 8MB/s
May 23 19:28:32 <veremit> compress it?
May 23 19:28:34 <zmatt> no way in hell you're going to see 40 MB/s via USB
May 23 19:28:41 <zmatt> where'd you find that number?
May 23 19:28:44 <veremit> otherwise the bbb is not your board
May 23 19:30:51 <veremit> try an x15 ;) lol
May 23 19:31:21 <veremit> or the single-core wand will do 1/2Gigabit
May 23 19:31:44 <zmatt> BBB can export more data if you use creative solutions I guess
May 23 19:31:44 <veremit> or pay some more for the quad XD
May 23 19:32:21 <zmatt> there's still a full 8-bit mmc/sd/sdio interface on the expansion headers
May 23 19:32:53 <veremit> I spose you could tack a gigabit phy on there ..
May 23 19:33:02 <zmatt> that's 48 MB/s if you hook up some SDIO wireless module
May 23 19:33:11 <zmatt> in theory
May 23 19:33:19 <veremit> not on the sdio .. on the other .. wait.. rip off the 100mbit :D heh
May 23 19:33:33 <veremit> there aren't two sets of rgmii pins are there?
May 23 19:33:46 <zmatt> only one set usable
May 23 19:33:55 <zmatt> and I doubt you'd find a pin-compatible replacement :P
May 23 19:33:55 <veremit> are there even pads?
May 23 19:34:03 <zmatt> yes, where the phy is located :P
May 23 19:34:21 <zmatt> but rgmii has tighter constraints on the PCB traces than mii obviously
May 23 19:34:32 <veremit> well duh
May 23 19:34:44 <zmatt> and it may need an externally provided clock (the trace for which is however also routed to somewhere in the neighbourhood of the phy
May 23 19:34:47 <veremit> I thought there were two interfaces .. ok so they'r enot brought out .
May 23 19:34:58 <zmatt> no the second one is unusable due the PCB design
May 23 19:35:19 <veremit> well thats not surprising .. I'm talking about anew pcb .. duh
May 23 19:35:21 <zmatt> as are the PRU MII interfaces (if you have an am3359)
May 23 19:35:35 <zmatt> oh, a new PCB, then you can have 2x gigabit ethernet if you want
May 23 19:36:06 <veremit> problem is .. you can't just .. Make a pcb lol
May 23 19:36:31 <zmatt> nope, that's why I was limiting myself to solutions that are actually possible with the BBB as-is :P
May 23 19:36:44 <veremit> throw it out th window and use something else XD
May 23 19:37:13 <veremit> you mean to say the sdio pins are brought out and are usable without timing constraints??
May 23 19:37:52 <zmatt> dunno how careful they've been... I mean, there are also LCD capes and those would have serious timing constraints too I'd imagine
May 23 19:38:14 <veremit> parallel video is fairly slow .. by comparison with lvds/etc
May 23 19:39:09 <zmatt> sure, but sdio is also 8-bit parallel
May 23 19:39:34 <zmatt> (max 48 MHz on the AM335x)
May 23 19:39:36 <veremit> hmm, spose
May 23 19:40:42 <zmatt> abusing hdmi might actually also be an option
May 23 19:40:48 <GenTooMan> They have to covert the output to HDMI data they are using 16 bits into the HDMI toy right?
May 23 19:41:17 <zmatt> you'll want to disable any color space conversions in the HDMI framer ;)
May 23 19:41:58 <zmatt> yeah they're stuffing only 16-bit data into the framer for some reason
May 23 19:42:13 <zmatt> (it supports 24-bit input and the am335x supports 24-bit output... oh well)
May 23 19:43:12 <veremit> I thought you could get 24bit rgb out ?! lol
May 23 19:43:33 <veremit> or is it 18
May 23 19:44:47 <zmatt> well the bus is only 16-bit
May 23 19:45:36 <zmatt> but in 16- or 24-bit mode the LCDC doesn't really care what your data means, it's just a big parallel output player, so it doesn't really say much about the actual format
May 23 19:45:43 <zmatt> i.e. it might use some chroma subsampled shit
May 23 19:46:20 <veremit> bus to the framer chip or .. ?
May 23 19:46:22 <zmatt> iirc the framer is really flexible
May 23 19:46:30 <zmatt> 16-bit bus from am335x to framer yes
May 23 19:46:43 <veremit> ah well gerald obviously decided that was 'sufficient'
May 23 19:46:45 <zmatt> 24-bit is exported to the cape header
May 23 19:46:49 <zmatt> it may very well be
May 23 19:47:02 <zmatt> you still need to also *produce* all that data
May 23 19:47:23 <veremit> yeah I thought 24bit was available .. we musta used that on our serializer then :D
May 23 19:47:46 <veremit> 8 bit rgb .. makes sense
May 23 19:48:00 <GenTooMan> they have all the pins mapped the issue likely is the color space conversion stuff
May 23 19:48:31 <zmatt> all of which can be disabled afaik
May 23 19:49:05 <zmatt> you can definitely use the LCDC as a dumb parallel output player... the only constraint is those damned hsync and vsync blank periods
May 23 19:49:28 <GenTooMan> Unfortunately I was looking for input LOL
May 23 19:49:44 <GenTooMan> is their a 12bit DAC on the thing as well?
May 23 19:49:52 <zmatt> input? I thought you wanted to offload data from the BBB to elsewhere
May 23 19:50:08 <zmatt> there's no DAC of any kind
May 23 19:50:17 <zmatt> you can abuse a PWM output for it
May 23 19:50:42 <zmatt> though that's not gonna make the world's best DAC for fast-modulating signals
May 23 19:50:51 <veremit> ah from the SRM: "The
May 23 19:50:52 <veremit> 16b interface was used to preserve as many expansion pins as possible to allow for use by
May 23 19:50:52 <veremit> the user.
May 23 19:50:52 <veremit> "
May 23 19:51:13 <zmatt> veremit: well those 16 pins are *also* wired to the expansion port
May 23 19:51:22 <zmatt> they could have wired all 24 to both
May 23 19:51:23 <veremit> with another 8 ..
May 23 19:51:30 <veremit> yeah pcb tracks is nothing
May 23 19:51:38 <veremit> I wonder what gerald was smoking .. lol
May 23 19:51:59 <zmatt> well to be fair, getting something like this right is non-trivial
May 23 19:52:30 <zmatt> that expansion header makes your transmission line theory fly out the window ;)
May 23 19:53:43 <zmatt> GenTooMan: the AM335x has lots of peripherals that can be abused for all sorts of I/O.... I suggest browsing the TRM ;)
May 23 19:53:46 <veremit> its parallel .. its Slow.
May 23 19:54:10 <veremit> if it were 00s of MHz+ that'd be a problem .. but at a few Mhz .. nope.
May 23 19:54:18 <veremit> I can do Mhz on a feckin breadboard
May 23 19:54:51 <veremit> speakin of bread .. brb ^_^
May 23 19:55:03 <zmatt> veremit: I keep forgetting "HD Video" isn't actually impressive
May 23 19:55:43 <GenTooMan> LOL indeed.. but it's useful
May 23 19:55:57 <zmatt> wait no that's not true actualy
May 23 19:56:45 <zmatt> 720p30 is 27.648 MHz + whatever is needed for the blanking intervals
May 23 19:57:23 <zmatt> so that's a bit more than "a few MHz"
May 23 19:57:56 <GenTooMan> they showed how you could tweak a VGA card to send RF signals once
May 23 19:58:27 <zmatt> apart from specialty interfaces like DDR I don't think the am335x has anything going higher than 48 MHz ?
May 23 20:00:40 <zmatt> maybe PRU can exceed it
May 23 20:03:21 <GenTooMan> Sucks really...
May 23 20:03:52 <GenTooMan> Also the DDR is not attached to the PIO. If it were one could paste a FPGA onto it.
May 23 20:04:19 <zmatt> GPMC can hook up to an FPGA
May 23 20:04:21 <veremit> most memory interfaces are specific
May 23 20:04:45 <zmatt> but there's the minor issue of pinmux overlapping with eMMC
May 23 20:04:49 <veremit> not that you couldn't fudge if it you wanted :)
May 23 20:04:58 <veremit> zmatt .. run from uSD
May 23 20:05:05 <zmatt> veremit: in that case GPMC is available
May 23 20:05:23 <GenTooMan> SDIO instead? that is what 25mhz @4bits?
May 23 20:05:30 <zmatt> (or if you fudge a creative kernel driver that arbitrates access)
May 23 20:05:44 <veremit> naa.. do it in fpga code .. make it emulate
May 23 20:05:45 <zmatt> GenTooMan: it should support 48 MHz x 8 bits in principle
May 23 20:06:05 <veremit> point of fact .. there aren't any fast interfaces cos its not designed for it
May 23 20:06:08 <zmatt> (definitely if have an FPGA available to interface for it)
May 23 20:06:15 <veremit> I Can't remember what the am335x was for actually ..
May 23 20:06:22 <zmatt> industrial applications mostly
May 23 20:06:37 <zmatt> etherCAT is its key application
May 23 20:06:42 <veremit> ah
May 23 20:06:50 <veremit> none of that is high data rate stuff normally
May 23 20:06:52 <zmatt> it's also the smallest member of the Jacinto 5 family (automotive infotainment)
May 23 20:06:55 <zmatt> correct
May 23 20:07:09 <veremit> you're lookin at the wrong procsssor :)
May 23 20:07:18 <veremit> square peg .. round hole ..
May 23 20:07:23 <zmatt> but it's why the am335x also has peripherals from TI's C2000 real-time controller series
May 23 20:07:31 <zmatt> (the PWMSS stuff)
May 23 20:08:43 <zmatt> eHRPWM can actually position its edges finer than its clock frequency (using delay lines)
May 23 20:08:53 <veremit> its an interesting lil processor .. but not really a 1st choice for an embedded toy arm board
May 23 20:08:54 <GenTooMan> cute picture interface for people pushing buttons?
May 23 20:09:12 <zmatt> GenTooMan: think networked sensors / motor controllers
May 23 20:09:23 <veremit> GenTooMan .. thats the Pi ;)
May 23 20:09:59 <zmatt> am335x has some pretty cool peripherals
May 23 20:10:36 <veremit> I need to do something with the PRU's ..
May 23 20:10:51 <veremit> Ineed another board actually .. since my other one is busy running 'net services lol
May 23 20:11:07 <zmatt> it's afaik also the first of TI's SoCs that combine an ARM Cortex-A with microcontroller-like peripherals such as the PWM subsystems, ADC, etc
May 23 20:11:33 <zmatt> it's a bit like a bridge between those two worlds
May 23 20:12:15 <GenTooMan> It's cool but I wanted to make use of it as a scope type device I guess pretty pictures is it.
May 23 20:12:37 <veremit> no for data capture DEFINITELY wrong device :)
May 23 20:13:01 <zmatt> I still wish they'd based a board on the 811x
May 23 20:13:13 <zmatt> (or admitted the 811x exists at all)
May 23 20:13:35 <veremit> the wht ? *chuckle*
May 23 20:14:11 <Spaghettios> did I miss a good joke?
May 23 20:14:20 <veremit> naa
May 23 20:14:51 <zmatt> veremit: cross between am335x and dm814x basically
May 23 20:14:53 <veremit> there's lots of good silicon around
May 23 20:15:02 <veremit> its just makin into a board
May 23 20:15:29 <zmatt> not as video-heavy, but *with* all the neat am335x stuff merged in like pruss and pwmss
May 23 20:15:34 <GenTooMan> Well my solution for the scope and spectrum toy was an FPGA and intermixing the data. But still not perfect.
May 23 20:15:57 <veremit> fpga is overkill tbh
May 23 20:16:04 <veremit> you just need a video dac or two
May 23 20:16:16 <veremit> adc*
May 23 20:16:42 <GenTooMan> For a spectrum analyzer and O scope peripheral?
May 23 20:16:59 <veremit> well if you want to get into ffts...
May 23 20:17:00 <zmatt> (811x also had a C674x DSP)
May 23 20:17:19 <zmatt> had... has... whichever
May 23 20:17:33 <veremit> better to buy something tbh GenTooMan
May 23 20:18:13 <veremit> esp if you want to rely on it for accuracy
May 23 20:18:26 <GenTooMan> well it wasn't 'just for my use' logic but sometimes that is true. the USB scope toys won't be good for this kind of stuff.
May 23 20:18:30 <veremit> not that you couldn't Make something .. but the cost/benefit ..
May 23 20:19:54 <Spaghettios> are you trying to build a spec an?
May 23 20:20:32 <GenTooMan> something like that. Make use of the BBB for the User interface device and some limited analysis.
May 23 20:21:48 <zmatt> I was thinking the BBB might make a great jtag debugger though
May 23 20:22:12 <GenTooMan> hmmm you might be right there zmatt. JTAG is something that it would be good for.
May 23 20:23:24 <zmatt> PRUSS is perfect for the icky protocol stuff, and you have the bandwidth and memory for quickly loading/dumping data or storing real-time trace, but you'd still need some good electrical interfacing
May 23 20:23:48 <zmatt> (the XDS100v2 uses a Xilinx CPLD for that)
May 23 20:24:01 <zmatt> the smallest coolrunner-ii available
May 23 20:30:36 <peacemaker> Please sound off;  what is your favorite web tool for IoT with BBB?  i'm trying out Xively.  or, do you roll your own?
May 23 20:32:47 <zmatt> wmat: ah, I see you're actually the person to talk to... people (including rcn-ee) have been encouraging me to write down my findings w.r.t. beaglebone power management, and the elinux wiki was suggested
May 23 20:33:12 <zmatt> wmat: but I can't make a page for it there
May 23 20:33:41 <zmatt> (I tried http://elinux.org/Beagleboard:BeagleBone_Power_Management since that seemed most in line with existing pages)
May 23 20:43:12 <GenTooMan> Sadly I am better with UI's that hardware.
May 23 20:43:21 <GenTooMan> ^than
May 23 20:45:10 <zmatt> my biggest problem is that I'm much better at understanding stuff than turning that understanding into a tangible result -.-
May 23 20:47:42 <peacemaker> what exactly is your goal with BBB power management?
May 23 20:49:04 <peacemaker> I am working on
May 23 20:49:23 <peacemaker> i am working on DC to DC converter, soon LDO
May 23 20:49:31 <zmatt> peacemaker: avoiding RMAs of products
May 23 20:50:34 <zmatt> (due to hardware damage and/or eMMC corruption)
May 23 20:53:15 <GenTooMan> well for the interface I would use one of those isolation devices TI makes and the other is to use their wide range voltage translators (5 to 0.9V I think)
May 23 20:54:34 <zmatt> ehh, just checking, is that line supposed to be directed at me?
May 23 20:55:16 <zmatt> ah, you're talking about the JTAG thing
May 23 20:55:17 <GenTooMan> zmatt: sorry yes :D
May 23 20:55:31 <zmatt> sorry, multitasking fail
May 23 20:55:57 <zmatt> GenTooMan: the XDS100v2 basically uses that CPLD as a level-shifter
May 23 20:56:02 <zmatt> except a bit smarter than that
May 23 20:56:35 <zmatt> e.g. when target power fails, all target-side IOs immediately go high-Z until explicitly reenabled by the host
May 23 20:56:48 <peacemaker> @zmatt what has been the most common failure mode in your product?
May 23 20:58:31 <zmatt> GenTooMan: TI actually points out that replicating equivalent functionality with discrete logic would end up much more complicated and with higher total component cost
May 23 20:58:37 <zmatt> GenTooMan: and I suspect they're right
May 23 21:00:00 <zmatt> GenTooMan: the only flaw of the coolrunner-ii is that they're not 5V-tolerant, which could be preferable
May 23 21:00:03 <zmatt> *would
May 23 21:00:26 <zmatt> GenTooMan: though the voltage could be clamped with a busswitch if the target is okay with 3.3V signals
May 23 21:01:52 <zmatt> other than that the c-ii is really tolerant... e.g. it doesn't mind signals being driven into an unpowered IO bank
May 23 21:02:00 <zmatt> the preferred power-up sequence is: "whatever."
May 23 21:03:19 <peacemaker> zmatt, if target power fails, it is important to save the state of the machine gracefully before it powers down so it can log the event and recover by itself.  ISR should be monitoring power rails so that this can happen.
May 23 21:03:57 <zmatt> peacemaker: yup, that's why we're including a li-ion battery in the design
May 23 21:04:33 <zmatt> also saves a lot of headache with the PMIC that's on the BBB (which is really designed for battery-powered operation and has all sorts of nasty quirks with operated without one)
May 23 21:06:05 <zmatt> but the PMIC has issues, the BBB power supply design has issues, and I'm getting the impression the AM335x itself has some too
May 23 21:06:10 <zmatt> so fun for everyone
May 23 21:06:21 <peacemaker> i worked for a couple of years with t-mobile where i created tools to do battery life / current drain test over hours to days at a run as a validation engineer. I did this project in c# winform project.
May 23 21:07:32 <zmatt> well since we don't actually need to *run* on battery, just cleanly shut down, I was planning on configuring very conservative charger settings in the PMIC to extend the li-ion's life as much as possible (rather than charging it to its fullest)
May 23 21:09:13 <peacemaker> this was on various oem handsets li-ion battery assessment with variations on user input of repetitive dialing out/ hanging up, date time stamp of measurement results.
May 23 21:09:49 <zmatt> peacemaker: but if you want to know more about what I've been discovering, check https://groups.google.com/d/msg/beaglebone/CKuTbHepHYE/qCEuTD5bGcsJ and the threads I link to in that post
May 23 21:11:32 <peacemaker> thanks, i'll review and get back to you, as i would like to use BBB with battery for my first IoT applications remotely.
May 23 21:12:04 <zmatt> I hope you're comfortable with performing solderwork on your BBB then
May 23 21:13:17 <veremit> lol
May 23 21:13:25 <zmatt> especially follow the "issues with its 3V3B-regulator" link and read that post and its follow-ups
May 23 21:52:18 <zmatt> ok, time for some zZ
May 23 21:52:21 * zmatt &
May 23 21:53:56 <Spaghettios> So I'm new to BBB and linux in general, I downloaded 15.04 snappy for BBB. Extracted with 7 zip, used win32 to image the sd card and I can't seem to make it work. Am I missing some huge step?
May 23 21:54:15 <Spaghettios> sorry
May 23 21:57:55 <_av500_> power down
May 23 21:57:58 <_av500_> insert card
May 23 21:58:04 <_av500_> hold down the user button
May 23 21:58:06 <_av500_> power on
May 23 21:58:23 <_av500_> the user button is the one not labeled reset
May 23 21:58:54 <Spaghettios> ok
May 23 22:00:38 <Spaghettios> you're talking about the one by the micro sd card?
May 23 22:01:38 <veremit> yus
May 23 22:02:07 <_av500_> one says reset
May 23 22:02:10 <_av500_> there are two
May 23 22:02:20 <veremit> there's 3 iirc .. :)
May 23 22:02:34 <veremit> reset/power/boot
May 23 22:02:50 <veremit> reset & power are together, boot separate
May 23 22:03:00 <Spaghettios> Thats what I did last time and let it run for about 45 minutes and the lights never went solid
May 23 22:03:21 <veremit> re-image your card
May 23 22:08:39 <Spaghettios> does fat32 or ntfs matter? I know the limitations of fat32 thats why ive used ntfs
May 23 22:10:18 <Spaghettios> Thanks for bearing with me, I know this is basic level questions
May 23 22:11:33 <veremit> erm .. should be neither ..
May 23 22:12:08 <veremit> well .. I think the board will read fat ..
May 23 22:12:18 <veremit> certainly not ntfs
May 23 22:12:43 <Spaghettios> so use diskpart wipe it and dont format it, then try win32 to push the image?
May 23 22:14:20 <veremit> crikey .. where you got this image from?
May 23 22:14:48 <Spaghettios> the internet....
May 23 22:14:57 <Spaghettios> ubuntu
May 23 22:15:10 <veremit> ubuntu don't do ARM builds afaik ..
May 23 22:15:13 <Spaghettios> made sure i selected the bbb version
May 23 22:15:16 <veremit> oh
May 23 22:15:59 <Spaghettios> I was perfectly happy with wheezy just kept running into problems with it not being supported anymore
May 23 22:16:48 <veremit> there's a debian jessie official image
May 23 22:17:46 <veremit> you working from: http://developer.ubuntu.com/en/snappy/start/#try-beaglebone ?
May 23 22:17:48 <wmat> zmatt: don't create the page withing the Beagleboard namespace, just create a page called elinux.org/BeagleBone_Power_Management
May 23 22:18:44 <veremit> if so, that won't write the emmc
May 23 22:20:24 <veremit> failing that .. i see RN's done a debian testing build .. (stretch RC)
May 23 22:20:46 <veremit> http://elinux.org/BeagleBoardDebian
May 23 22:21:46 <Spaghettios> that would explain a lot
May 23 22:21:52 <veremit> otherwise I'd defer to http://elinux.org/BeagleBoardUbuntu if you must use Ubuntu
May 23 22:22:53 <Spaghettios> honestly, I'm mostly wanting to tinker with vlc and any other beginner projects I like
May 23 22:23:17 <Spaghettios> so whatever you recommend I'll go with
May 23 22:24:42 <veremit> if you want a desktop and media player .. I'm not sure I'd be running it on a beagle personally
May 23 22:24:54 <veremit> it will .. but you might find it a bit slow
May 23 22:26:01 <veremit> brb
May 23 23:24:20 <Spaghettios> Thanks for all the help veremit
May 23 23:24:43 <veremit> all cookin now?
May 23 23:27:23 <Spaghettios> not yet, I'm at work so bouncing around fixing airplanes and trying to get this working
May 23 23:27:47 <veremit> awesome
May 23 23:30:34 <Spaghettios> 3d printer looks like a useful project
May 23 23:30:56 <veremit> well my boss's has sat idle for .. nearly a year now
May 23 23:32:42 <Spaghettios> I've never used one, but work wise it could be useful for custom making parts (mostly on the computer side)
May 23 23:39:20 <veremit> they do have their uses
**** ENDING LOGGING AT Sun May 24 02:59:59 2015