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[02:43:45] <memleak> im trying to build an rtai package for wheezy but run into stubs-32.h:
http://dpaste.com/20C083C
[02:44:20] <memleak> i have a stubs-32.h in /usr/include/i386-linux-gnu/gnu/ but not in /usr/include/gnu/
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[03:23:52] <jepler> memleak: you're including userspace headers while building a kernel module. it's a wonder it ever worked.
[03:24:06] <memleak> heh..
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[03:26:42] <memleak> any idea what the fix is?
[03:27:12] <jepler> fix rtai not to include userspace headers while building kernel modules
[03:27:17] <memleak> HEH!
[03:31:14] <memleak> "The use of kernel headers in user space has long been discouraged." ->
http://lwn.net/Articles/113349/
[03:31:33] <memleak> so shouldnt it be using userspace headers?
[03:53:18] <NTU> ah right, kernel headers arent userspace..
[03:53:21] <NTU> durr
[03:54:46] <NTU> well making rtai use kernel headers instead of userspace is over my head..
[03:55:10] <NTU> there is no "endian.h" in kernel space headers so im stuck...
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[11:38:13] <KGB-linuxcnc> 03Michael Geszkiewicz 05master 5619c68 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hostmot2.c 10src/hal/drivers/mesa-hostmot2/hostmot2.h 10src/hal/drivers/mesa-hostmot2/stepgen.c hm2: add stepgen support for DPLL timer selection for sampling position. * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=5619c68
[11:39:00] <micges-dev> seb_kuzminsky: I'll document missing parts of hm2 man later
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[11:51:37] <jepler> NTU: <asm/byteorder.h> -- in linuxcnc source, see src/rtapi/rtapi_byteorder.h for the file that linuxcnc uses to portably provide some macros like RTAPI_BIG_ENDIAN in both userspace and kernelspace
[11:53:22] <jepler> incidentally, in the version of mathP.h I have, I think there's an incorrect comment:
[11:53:25] <jepler> * Math on arm is little endian except for the FP word order which is
[11:53:28] <jepler> * big endian.
[11:54:15] <jepler> this code, which shows the hex memory encoding of the double-precision float 1.0 in hex in native order prints the same on amd64 and my armhf box:
[11:54:18] <jepler> python -c "import struct; print struct.pack('f', 1.0).encode('hex')"
[11:54:20] <jepler> 0000803f
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[12:35:17] <jepler> err, that was a single-precision float but a double is the same
[12:35:18] <jepler> python -c 'import struct; print struct.pack("d", 1.0).encode("hex")'
[12:35:18] <jepler> 000000000000f03f
[12:40:56] <cradek> haha [on topic]
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[13:06:19] <mozmck> Will someone PM me the name of "our mascot" so I can edit a wiki page, please?
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[13:52:29] <memleak> jepler, which header should i include for this compiling error now? error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘__P’ line is: extern double __ieee754_sqrt __P((double));
[13:52:57] <memleak> switching endian.h to asm/byteorder.h did some good
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[13:56:42] <memleak> also /home/ntu/deb/RTAI/base/math/e_acos.c:81:6: error: implicit declaration of function ‘__ieee754_sqrt’ [-Werror=implicit-function-declaration]
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[14:07:17] <jepler> memleak: __P is an abomination that should be excised from rtai
[14:08:21] <jepler> memleak: before ANSI C, the only portable way to declare a function was with an empty argument list: double sqrt(); the ANSI C declaration gave the type of the argument: double sqrt(double);
[14:08:42] <jepler> memleak: the __P macro is concerned with allowing the code to be built on compilers that did not support the 1989 C standard
[14:08:58] <jepler> memleak: so replace __P(...) with simply its argument everywhere
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[14:09:13] <cradek> mozmck: it's chips
[14:09:49] <cradek> mozmck: if you forget, it's the name of his image, too
[14:09:51] <memleak> jepler can you provide an example?
[14:10:10] <jepler> -extern double __ieee754_sqrt __P((double));
[14:10:10] <jepler> +extern double __ieee754_sqrt(double);
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[14:10:32] <memleak> ok will try thank!
[14:10:36] <memleak> *thanks
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[14:17:36] <memleak> ok that problem is fixed.. now i need to replace all the "math.h" lines with something else in base/math/*.c
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[14:17:57] <memleak> for things like sqrt
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[14:25:05] <brianmorel99> memleak: Which RTAI version are you working on?
[14:25:52] <memleak> my own.
https://github.com/ntulinux/rtai
[14:26:44] <brianmorel99> Do you subscribe to their mailing list? There has been some messages in the last couple days regarding math issues. Apparently there has been updates since 4.0 was released.
[14:27:00] <memleak> no these problems are entirely unrelated
[14:27:29] <memleak> i fixed all the math troubles that those people are complaining about on the mailing list
[14:27:46] <memleak> im working on a debian package for my RTAI tree but i run into a stubs-32.h problem
[14:28:06] <memleak> once i make RTAI use kernel headers as opposed to userspace then that problem will be fixed
[14:28:40] <memleak> sad part I suck at C and need help
[14:29:22] <memleak> i have 3.14.18 RTAI kernel debs
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[14:29:40] <memleak> now i just need to package RTAI userspace (/usr/realtime) and linuxcnc
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[14:30:12] <memleak> on gentoo i didnt have the stubs-32.h no such file or directory problem
[14:32:15] <brianmorel99> I thought I ran into that on my 64b system, may be Gentoo includes both 32b and 64b headers (or I may be way off)
[14:32:42] <memleak> gentoo works perfectly fine with RTAI, no stubs-* problems at al
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[14:33:46] <brianmorel99> I do remember the build system for RTAI being a huge PITA.
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[14:49:02] <memleak> i re-worked its build system entirely
[14:49:14] <memleak> this is just a really obscure problem i never seen before
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[14:49:51] <memleak> i built my tree on several gentoo systems, both 32-bit and 64-bit just fine
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[14:52:45] <memleak> the build system is all automated now pretty much
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[14:53:43] <memleak> re-worked kconfig / kbuild, autotools, removed hundreds of lines from configure.ac (formally configure.in) tons of clean-up all around
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[15:16:48] <seb_kuzminsky> the docs bug reported by Joe Hildreth a few days ago is because we don't correctly regenerate the pngs of the latex equations in our docs
[15:17:11] <seb_kuzminsky> the "source" is correct, but the manually generated, git-committed image is out of date :-/
[15:18:50] <cradek> yuck.
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[15:43:09] <kwallace2> Has anyone played with this Atom board?
https://www.sparkfun.com/products/13024
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[15:45:42] <kwallace2> https://communities.intel.com/docs/DOC-23139
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[16:06:00] <pcw_home_> look interesting (with the independent 100 MHz ucontroller) a 500 MHz Atom is going to be pretty darned slow though
[16:07:22] <kwallace2> BBB is about the same speed?
[16:08:36] <pcw_home_> yeah maybe (the Edison atom is dual core 500 MHz the BBB is single core 1 GHz Arm )
[16:10:06] <kwallace2> I'm beginning to understand how small this board is 1.4" x 1", about thumb size.
[16:11:00] <kwallace2> Don't drop it on the carpet.
[16:13:16] <jepler_> seb_kuzminsky: that worked a thousand years ago, I wonder when it broke
[16:13:36] <jepler_> it's news to me that the generated images are committed in git. :(
[16:15:37] <jepler_> it's been a long time since linuxcnc has been tuned to work well on machines that slow, as all the people using bbb have discovered
[16:18:59] jepler_ is now known as jepler
[16:19:56] <kwallace2> I'm wondering if being x86 and multi-core might help? I guess there is one way to find out.
[16:22:30] <seb_kuzminsky> jepler: did it ever work after the lyx->asciidoc transition?
[16:23:10] <pcw_home_> well it has no built in display so a machinekit type thing with remote display might be OK
[16:23:12] <pcw_home_> (but even for that 1/3 the speed of a D525 is pretty dismal)
[16:23:18] <seb_kuzminsky> the image with the bug report against it was committed in 2011 (1c9d72c0)
[16:24:13] <jepler> there's no video interface on the 70-pin connector, so you'd have to use a remote interface over wifi
[16:25:13] <jepler> seb_kuzminsky: I don't know how it is supposed to work since the asciidoc conversion
[16:25:49] <jepler> is this an asciidoc comment block ? +//////////////////////////////////////////////
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[16:26:12] <seb_kuzminsky> http://sourceforge.net/p/emc/bugs/382/
[16:26:36] <jepler> I guess I was too checked-out of the conversion to asciidoc to catch a terrible problem like this
[16:26:43] <pcw_home_> The Edison does have SPI (what its connected to I dont know)
[16:28:06] <jepler> yeah, 25MHz master mode, but it doesn't say whether it's connected to the atom or the mcu
[16:28:36] <seb_kuzminsky> jepler: i think maybe the old asciidoc that was available when we first switched had problems with math formulas? and maybe the new one does better?
[16:28:49] <seb_kuzminsky> not sure
[16:29:54] <CaptHindsight> https://communities.intel.com/servlet/JiveServlet/downloadBody/23158-102-4-27348/edison-module_HG_331189-002.pdf
[16:30:22] <CaptHindsight> about as much detail without NDA I can find on the Edison ^^
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[16:31:25] <CaptHindsight> https://communities.intel.com/community/makers/edison/documentation
[16:33:56] <CaptHindsight> the block diagram shows the GPIOs, various buses (SPI included?) connected to the Atom
[16:36:04] <jepler> yeah so the 100MHz MCU must also be in the same package
[16:36:07] <jepler> SPI driver for the Topcliff PCH (Platform Controller Hub) SPI bus
[16:36:10] <jepler> used in some x86 embedded processors.
[16:36:34] <jepler> bool "DMA support for DW SPI controller on Intel Moorestown platform"
[16:36:44] <jepler> there are just two intel spi drivers in 3.17-rc1
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[16:41:18] <CaptHindsight> Intel is not making much money on these modules. I'm surprised that they don't just take a low power Atom and slap on a real time hardware block with a bunch of IO
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[16:46:32] <CaptHindsight> they could sell Atom's with integrated PRU's for $10
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[16:56:16] <CaptHindsight> the GPIO on the AMD APU's can be toggled into the several 100kHz, but they didn't put that many IO pins on them
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[17:08:26] <skunkworks> A week at 16us.. I think we are good
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[17:11:04] <CaptHindsight> http://store.linksprite.com/pcduino3-nano/ $39 dual core 1GHz ARM in *duino form factor
[17:17:07] <Tom_itx> will the HDMI kill it for our purpose?
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[17:24:07] <skunkworks> the device that jepler was playing with for spi had hdmi...
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[17:25:38] <kwallace2> CaptHindsight, thanks for the pcDuino link. That looks perfect for a webcam application I'm thinking about.
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[17:44:45] <seb_kuzminsky> skunkworks: Odroid U3, from hardkernel.com
[17:50:51] <CaptHindsight> kwallace2: Linuxcnc runs on it with preempt_rt
[17:51:37] <kwallace2> Cool.
[17:51:59] <CaptHindsight> hm2_eth builds but we haven't tested it yet
[17:55:14] <kwallace2> I was hoping to put a picture server inside my camera box:
http://wallacecompany.com/E45/Q68_cam2-1a.jpg , camera -> USB -> server(gPhoto, ImageMagic) -> Ethernet -> WRT54 -> WiFi
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[18:13:50] <jepler> ugh on the pcduino schematic, SPI0_CLK is level-shifted with a single-transistor inverter
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[18:14:11] <jepler> sheet 15 in
https://cdn.sparkfun.com/datasheets/Dev/PCDuino/PCDUINO3Schm.pdf
[18:17:02] <jepler> this doesn't make a lot of sense to me, as SPI0_CLK is a signal direct from the A20 chip on sheet 6 too
[18:17:19] <jepler> oh I read that backwards, duh
[18:17:27] <CaptHindsight> page #16
[18:18:07] <CaptHindsight> SPI is on a 6 pin header with some esd protection
[18:20:03] <CaptHindsight> IIRC all that IO is 3.3V on the pads
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[18:22:21] <jepler> that would be convenient
[18:23:15] <CaptHindsight> ethernet MAC is integrated so hm2_eth might work
[18:25:16] <CaptHindsight> I have to do some soldering on the a20 board here since the 5V is flaky, we have problems booting from the sd-card and SATA gets corrupted
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[18:29:10] <CaptHindsight> kwallace2: just so you're aware the GPIO on the PCDuino is not as fast as the AVR's on the Arduino
[18:33:30] <jepler> seb_kuzminsky: do the scratch-branch docs go somewhere? I didn't look too hard.
[18:34:10] <jepler> ah looked a little harder
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[18:38:40] <KGB-linuxcnc> 03Jeff Epler 05jepler/proposed-2.6 62ca1b4 06linuxcnc 10docs/src/quickstart/stepper_quickstart.txt how do our platforms do on latexmath today? * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=62ca1b4
[18:40:22] <seb_kuzminsky> jepler: you probably already found it, but here you go:
http://buildbot.linuxcnc.org/doc
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[18:50:45] <jepler> well just from local testing on debian wheezy, even the supposed example from asciidoc.org doesn't work to put math in html
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[19:00:04] <CaptHindsight> maybe I should mirror psha's camview packages since they might disconnect Russia from the net
[19:03:41] <jepler> it's a2x that is busted, not asciidoc itself.
[19:03:56] <jepler> this thread is years old but it seems to touch on the same problem:
https://groups.google.com/forum/#!msg/asciidoc/QQF7NlhE5rs/F8NZhpfJKVQJ
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[22:21:14] <memleak> jepler, any idea what to replace math.h with in RTAI? base/math/e_*.c
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[22:47:12] <seb_kuzminsky> Ted Ts'o reiterates what makes a patch contribution mergeable:
http://thread.gmane.org/gmane.comp.encryption.general/20735
[22:47:16] <seb_kuzminsky> the PS: is the TL;DR
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[23:11:58] <CaptHindsight> http://emc2arduino.wordpress.com/downloads/hal2arduino/ is this worth trying to use?
[23:14:02] <CaptHindsight> heard of it but haven't tried it yet
[23:14:33] <mozmck> seb_kuzminsky: what does TL;DR mean?
[23:14:40] <CaptHindsight> I'd like to try controlling several hobby type RC servos
[23:16:15] <seb_kuzminsky> mozmck: too long; didn't read
[23:17:09] <mozmck> huh, not sure I understand what that means then relating to the PS.
[23:17:28] <seb_kuzminsky> CaptHindsight: looks like a neat hack, btu don't arduinos connect via usb? so you won't get good realtime performance on the communications like you would with a mesa fpga
[23:18:07] <seb_kuzminsky> mozmck: it means: if you don't want to bother reading the whole message, just read the PS:
[23:18:34] <seb_kuzminsky> CaptHindsight: if you want to plug in a bunch of non-realtime I/O, arduino seems like a fine way to go
[23:18:35] <mozmck> seb_kuzminsky: ah, I see :) good PS I thought - and whole post
[23:19:00] <seb_kuzminsky> :-)
[23:19:12] <CaptHindsight> seb_kuzminsky: I don't need real time over USB, I just want to control some motors and sync to Linuxcnc with classic ladder
[23:19:21] <seb_kuzminsky> treating clueless contributors as hostile nsa spies is a new analogy for me, but it sort of makes sense
[23:20:02] <seb_kuzminsky> CaptHindsight: then it might be worth a try, i didnt read the code at all but the overall idea seems reasonable
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[23:21:25] <CaptHindsight> seb_kuzminsky: I'm controlling a robot with Linuxcnc, but need some RC servos to open and close things the robot moves things through
[23:21:26] <mozmck> best way for a hostile spy to act - clueless contributor!
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[23:29:44] <KGB-linuxcnc> 03Sebastian Kuzminsky 052.6 15d8eba 06linuxcnc 10docs/src/quickstart/images/step-calc-inch-math.png docs: update stepper quickstart equation * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=15d8eba
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[23:46:25] <jepler> memleak: with a rtai header that properly provides extern declarations for everything that rtai_math.ko provides? (this file doesn't exist yet afaik, but it would be in some respects similar to rtapi_math.h except without the arch-dependent asm magic)
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[23:54:34] <memleak> - return log1p(t+sqrt(2.0*t+t*t));
[23:54:35] <memleak> + return __ieee754_log(t+__ieee754_sqrt(2.0*t+t*t));
[23:55:00] <memleak> that compiled... but it's probably wrong
[23:55:30] <memleak> this is over my head i think.
[23:59:25] <jepler> yes that's certainly wrong
