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[01:45:29] <jepler> who cares if whatever I decide to do is not upstreamable :-P
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[01:53:56] <jepler> I think I managed to hack synchronous transfers back into the kernel SPI driver
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[02:04:57] <memleak> is there an i2c parport driver for linuxcnc?
[02:05:44] <memleak> i dont remember but i think i saw something like that in there.
[02:11:45] <jepler> doesn't particularly ring a bell
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[02:21:11] <jepler> there is something called drivers/i2c/busses/i2c-parport.c
[02:21:18] <jepler> * i2c-parport.c I2C bus over parallel port
[02:21:55] <jepler> https://www.kernel.org/doc/Documentation/i2c/busses/i2c-parport
[02:22:00] <jepler> it even has a documentation file
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[02:28:27] <memleak> thats what i was talking about
[02:28:37] <memleak> for some reason i thought linuxcnc can communicate with that driver
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[02:30:14] <jepler> some people have written i2c bitbanging as a linuxcnc realtime component too
https://github.com/cdsteinkuehler/LinuxCNC-RepRap/blob/master/components/I2C.comp
[02:31:08] <jepler> probably works with something like that first schematic
[02:33:28] <jepler> not fast, something like 1/3 i2c bit per hal period
[02:38:22] <memleak> oh cool!
[02:46:19] <Tom_itx> i used i2c on parport for some temp sensors
[02:46:25] <Tom_itx> lmsensors
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[12:53:43] <jepler> I don't think I ever scoped scope.sample.time before now.
[12:53:53] <jepler> you can actually see that its time gets slightly lower once it's triggered
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[13:41:09] <cradek> andypugh: have you ridden it yet?
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[13:59:42] <skunkworks> cradek,
https://www.youtube.com/watch?v=mpHFVzwwZWs&list=UUexvgsGz_QFvOublovDYoTQ
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[14:04:53] <archivist> I was going to comment a few milliseconds after testing the brake, I would have been right
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[14:15:17] <jepler> well despite eliminating async this and dma that, I still get 800+us tmax on spidev
[14:17:50] <cradek> skunkworks: oh awesome
[14:18:48] <skunkworks> jepler, so off to write a driver
[14:18:50] <skunkworks> ?
[14:18:52] <skunkworks> ?
[14:19:20] <skunkworks> cradek, I like his little grin at end :)
[14:19:38] <cradek> it sure started easily
[14:19:59] <cradek> does it have a kick start or is he kick-spinning the outside of the flywheel-clutch part?
[14:20:13] <jepler> that rear tire looks severely underinflated
[14:20:33] <jepler> also, the internal combustion engine is a fad
[14:22:33] <jepler> hmm numerous cuts .. we'll assume they're just to keep the video length reasonable
[14:23:01] <cradek> I assume he just cut the parts where he's out of view
[14:26:19] <jepler> skunkworks: I'll stare some more at the driver I have first
[14:26:38] <jepler> skunkworks: there are lots of lines over three source files, maybe something I've overlooked
[14:29:41] <skunkworks> you will figure it out
[14:31:18] <jepler> keep the self-affirmation jpegs coming until I do
[14:31:45] <cradek> http://24.media.tumblr.com/b18e7d58ca603db3f838b3ba7aaaa085/tumblr_mfpua5yDWR1rmwqc0o1_250.gif
[14:32:30] <cradek> I like how andy uses G33 for crazy things
[14:32:52] <cradek> that was really my vision, making it work in any direction for any reason
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[14:51:42] <pcw_home> skunkworks: did you get linuxcnc to compile on Ubuntu 14.04?
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[15:02:28] <seb_kuzminsky> pcw_home: i've build master (uspace) on trusty, it passed runtests
[15:04:16] <pcw_home> my compile errors out in taskmodule.cc
[15:04:40] <seb_kuzminsky> mm, lemme look again
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[15:05:42] <pcw_home> probably something broken on this machine (upgraded? from 12.04)
[15:06:38] <seb_kuzminsky> pastebin the error?
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[15:09:09] <pcw_home> lots of gobbledegook:
[15:09:10] <pcw_home> http://pastebin.com/7B2Nz65m
[15:10:15] <seb_kuzminsky> oh yes
[15:12:08] <seb_kuzminsky> if you 'cd debian; ./configure uspace; cd ..; dpkg-checkbuilddeps', you'll get a list (possibly empty) of packages you need to install
[15:12:22] <seb_kuzminsky> install all of them *except* libgnomeprintui-dev, and see if that makes your compile go
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[15:18:03] <seb_kuzminsky> yeah, wfm here
[15:18:33] <pcw_home> ok trying that now
[15:19:00] <seb_kuzminsky> this is a fresh install of trusty, not an upgrade, so maybe something is different about the upgrade path
[15:19:03] <seb_kuzminsky> bbl
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[16:00:17] <seb_kuzminsky> Runtest: 142 tests run, 142 successful, 0 failed + 0 expected
[16:00:17] <seb_kuzminsky> 0 09:27:10 seb@trusty-i386 /home/seb/linuxcnc-dev/src>
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[16:07:05] <jepler> seb_kuzminsky: +1
[16:09:14] <pcw_home> hmm not sure whats different but my compile still fails in the same place
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[16:11:47] <jepler> pcw_home: what is "gcc -version"? What is shown when you "dpkg -l libboost*-dev"?
[16:11:57] <jepler> I suspect the version of gcc or of libboost is different from your machine to seb's.
[16:12:11] <jepler> so obviously it would be useful to know the same information for seb's trusty machine
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[16:17:38] <seb_kuzminsky> gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
[16:17:59] <seb_kuzminsky> ii libboost-python-dev 1.54.0.1ubuntu1 i386 Boost.Python Library development files (default version)
[16:18:02] <seb_kuzminsky> ii libboost-python1.54-dev:i386 1.54.0-4ubuntu3 i386 Boost.Python Library development files
[16:18:05] <seb_kuzminsky> ii libboost1.54-dev 1.54.0-4ubuntu3 i386 Boost C++ Libraries development files
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[16:30:24] <jepler> http://stackoverflow.com/questions/18900730/boostshared-ptrshared-ptrconst-boostshared-ptr-is-implicitly-declared
[16:30:40] <jepler> it looks like the problem *could be* a too old version of boost
[16:31:00] <jepler> https://svn.boost.org/trac/boost/changeset/73202
[16:32:42] <seb_kuzminsky> i feel a versioned dependency coming on
[16:36:58] <jepler> seb_kuzminsky: debian/configure dependent too
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[16:37:35] <jepler> seb_kuzminsky: since whatever boost pcw_home has is probably OK in natty but apparently not in trusty (because of gcc changes)
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[16:41:29] <memleak> gcc and boost python issues with linuxcnc? i can help with that! whats the problem? compiling error? got the output?
[16:41:53] <memleak> ah the pastebin, one sec
[16:42:18] <jepler> memleak:
http://pastebin.com/7B2Nz65m which looks like
http://stackoverflow.com/questions/18900730/boostshared-ptrshared-ptrconst-boostshared-ptr-is-implicitly-declared
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[16:43:43] <memleak> ive been able to build linuxcnc with 3 or 4 different versions of boost and boost python (gentoo here)
[16:44:24] <memleak> my guess is maybe conflicting boost-python libs, fix might be explicitly set --with-boost-python into configure line
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[16:45:35] <memleak> also python2 should be the one symlinked to /usr/bin/python (or ./configure --with-python but you'll get runtime issues later on due to hard codes in linuxcnc)
[16:46:01] <memleak> pcw_home, can you post output of ./configure?
[16:47:28] <memleak> python boost 1.54 works fine here
[16:48:42] <skunkworks> http://www.machsupport.com/forum/index.php/topic,27782.20.html
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[16:53:48] <pcw_home> looks like I have 2 versions installed 1.46 and 1.48
[16:54:07] <memleak> eek.
[16:54:11] <jepler> pcw_home: install libboost1.54-dev and remove any libboost*dev package that is not 1.54
[16:54:21] <memleak> 1.4X is too old
[16:54:30] <memleak> i never used 1.4
[16:54:33] <jepler> I think libboost1.54-dev will pull in libboost-python1.54-dev but if not, install it manually
[16:54:55] <memleak> (i think its too old considering gentoo doesnt even go back to 1.4X releases)
[16:55:11] <memleak> earliest is 1.52
[16:55:13] <seb_kuzminsky> boost 1.48 works fine on precise, with gcc 4.6.3
[16:55:33] <memleak> ok so maybe 1.46 is too old and 1.48 and newer is fine
[16:56:11] <jepler> I think that newer gcc tightened the interpretation of c++11, making boost versions that were OK not OK anymore
[16:56:22] <memleak> yes that happened with 48
[16:56:24] <memleak> *4.8
[16:56:45] <seb_kuzminsky> pcw_home: if you remove libboost1.46-dev and keep 1.48-dev, reconfigure & rebuild, does it work?
[16:57:03] <jepler> OK, I didn't read close closely enough to find out which versions had compatibility problwems
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[16:57:14] <jepler> but now we know some pairs that are bad and some pairs that are good
[16:57:28] <memleak> speaking of which im going to bump my boost to 1.55
[16:57:37] <memleak> (because I can)
[16:58:02] <memleak> how does linuxcnc use boost anyway>
[16:58:23] <memleak> oh lord the compiling times for boost, forgot about that.. XD
[16:58:41] <jepler> memleak: it is used in code which allows the interpreter to be extended with Python.
[17:01:33] <skunkworks> cough - you have to be a programmer to use mach4...
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[17:02:14] <skunkworks> https://www.youtube.com/watch?v=MRyaRQwhYWk&feature=youtu.be
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[17:06:39] <memleak> jepler, the rule of thumb with GCC is that with each release, it gets more strict, exposes more bugs in more projects, and errors out at more coding mistakes.
[17:07:40] <memleak> on the upside of performance enhancements if there isnt a compiler / optimization bug which again falls under strictness
[17:10:51] <pcw_home> Thanks! upgrading libboost-dev to 1.54 fixed it (at leas the taskmodule.cc issue)
[17:11:05] <memleak> sweet!
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[17:20:38] <pcw_home> and it works...
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[17:28:07] <seb_kuzminsky> yay
[17:35:34] <pcw_home> jepler: I fixed the twiddler interface firmware and example code to work with the latest D8 processor so now only the USB code uses the old processor. I also updated it so that the processor runs at its own clock, not the bus interface clock, so for cards like a 5I25, the CPU clock speed can be 100 MHz while the bus speed is 33 MHz
[17:36:58] <seb_kuzminsky> pcw_home: i think something went wrong in yout upgrade to trusty. we build-depend on libboost-python-dev, which in trusty depends on libboost-python1.54-dev, which depends on libboost1.54-dev, which works
[17:37:23] <seb_kuzminsky> did you just use the standard 'do-release-upgrade' thing on your old ubuntu install? which release was that?
[17:38:15] <pcw_home> Yeah i just said yes when it asked to upgrade to 14.04
[17:38:30] <pcw_home> it was 12.04
[17:40:33] <seb_kuzminsky> bummer that it got it wrong :-/
[17:41:35] <pcw_home> I think i had the same issue on another machine upgraded from 12.04 to 14.04
[17:41:36] <pcw_home> of course I may have done the wrong thing twice
[17:42:20] <seb_kuzminsky> on an upgraded machine that doesn't work, i'd be curious to see 'dpkg -s libboost-python-dev'
[17:44:08] <pcw_home> ii libboost-python- 1.48.0.2 i386 Boost.Python Library development files
[17:44:10] <pcw_home> ii libboost-python1 1.46.1-7ubunt i386 Boost.Python Library development files
[17:44:11] <pcw_home> ii libboost1.46-dev 1.46.1-7ubunt i386 Boost C++ Libraries development files
[17:45:23] <seb_kuzminsky> i must be missing something
[17:45:34] <seb_kuzminsky> libboost-python-dev version 1.48.0.2 isn't in trusty
[17:45:46] <seb_kuzminsky> that looks like a partial upgrade
[17:46:13] <seb_kuzminsky> if you run 'sudo apt-get update && sudo apt-get install libboost-python-dev', does it pick up libboost-python-dev 1.54?
[17:47:37] <pcw_home> let me give that a try
[17:48:36] <pcw_home> libboost-python-dev is already the newest version. (since I had installed 1.54)
[17:49:11] <seb_kuzminsky> oh, this is on the machine you just fixed?
[17:49:19] <pcw_home> yes
[17:49:33] <seb_kuzminsky> ah ok
[17:49:37] <seb_kuzminsky> i'll try an upgrade here
[17:50:08] <pcw_home> I reverted the other machine to 12.04 since i had these problems
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[17:52:15] <pcw_home> its entirely possible the upgrade was mangled because the 12.04 system was broken in various ways before I started
[17:52:28] <seb_kuzminsky> heh ok
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[17:53:58] <pcw_home> I think I gave up at the tcl issues on the other system (that just needed tcl-dev and tk-dev 8.6 installed)
[17:54:10] <seb_kuzminsky> i booted a fairly clean precise machine and after a few minutes it popped up a window asking if i wanted to upgrade to trusty, and i clicked ok and it started doing stuff
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[19:24:27] <jepler> can somebody choose a less angry background than that yellow for code boxes on the forum?
[19:24:43] <jepler> the chance I could help anyone with their code is diminished by the automatic headache
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[19:31:13] <ssi> lol
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[19:39:03] <seb_kuzminsky> jepler: bust out that monochrome monitor of yours
[19:43:29] <cradek> just unplug the red and blue BNCs
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[19:43:46] <PCW> Or EL panel, then everything is bright yellow
[19:44:41] <seb_kuzminsky> we're so helpful
[19:46:17] <cradek> it might even have themes you can pick ... somewher
[19:46:18] <cradek> e
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[20:13:10] <seb_kuzminsky> my precise->trusty upgraded machine has the same problem that PCW reported
[20:13:24] <seb_kuzminsky> old boost-dev libs around, and it's missing the new one
[20:14:55] <seb_kuzminsky> after the precise->trusty upgrade, running "apt-get update && apt-get dist-upgrade" seems to have fixed the problem
[20:15:20] <seb_kuzminsky> it upgrades libboost-python-dev to the trusty version, which pulls in the 1.54 boost packages
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[20:15:29] <PCW> so the upgrade is not really complete
[20:15:37] <seb_kuzminsky> wonder why the precise->trusty upgrade didnt do that?
[20:15:45] <seb_kuzminsky> PCW: yeah, seems that way
[20:17:27] <PCW> Thanks for looking at that (and glad I didn't do anything stupid to fumble the upgrade twice)
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[20:35:03] <cradek> aha, in
http://1.bp.blogspot.com/-szYIGh52z1M/U_u04wCCPtI/AAAAAAAAELg/hivSv_6-cI0/s1600/IMG_1472.jpg I see an obvious kickstarter
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[20:35:51] <jepler> geez, it took me a minute to figure out you didn't mean "an idea for something to market via kickstarter.com"
[20:38:18] <seb_kuzminsky> heh
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[21:41:15] <jepler> what actually happens in a hardware stepgen system when you have an out-of-spec latency in the servo thread?
[21:41:41] <jepler> with software stepgen, a latency probably causes your steppers to stall, and you lose position
[21:41:54] <jepler> but with mesa, your steppers will keep going at an appropriate velocity
[21:42:02] <seb_kuzminsky> right
[21:42:12] <jepler> and when linuxcnc comes back, stepgen (if you've set stepgen accel limits) won't change velocity so quickly that it stalls the motors
[21:42:28] <jepler> you could following error if the motors were stepped too far while linuxcnc napped
[21:44:55] <PCW> if you use a hardware stepgen and a PID loop to mainly correct for long term timing errors cycle/cycle jitter is not too important
[21:46:14] <PCW> that is the loop is tuned to "trust" the stepgen hardware so FF1 = 1.000 P gain= low maxerror= low
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[21:47:08] <PCW> so the corrections have a low slew rate/bandwidth
[21:48:13] <jepler> today I'm running a CPU-intensive function on my main thread -- using approximately 50% of one CPU core
[21:48:33] <jepler> it will tell me something useful if that gets big latencies like spi
[21:48:56] <jepler> namely that it's not some unidentified part of spi that is still sleeping, but a latency from some other source
[21:50:18] <jepler> and in fact it did just see a tmax = tavg + ~300us
[21:50:42] <jepler> so there's some significant latency that is not spidev
[21:51:39] <jepler> and the very quick latency-test / latency-histogram tests just get hit by it proportionally less -- enough less that it's not seen in 24 hours of testing, but turns up in 20 minutes of testing with an RT CPU hog
[21:58:22] <jepler> surely the thing I just changed is not *it*
[21:59:15] <jepler> better let it run before making big-mouth pronouncements
[22:00:44] <jepler> nah of course not
[22:01:24] <jepler> it's still *a* thing, maybe: don't run ntp
[22:01:50] <jepler> it can change CLOCK_MONOTONIC by steps
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[22:12:52] <jepler> (.. has anyone attempted to operate linuxcnc over a leap second yet?)
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