#linuxcnc-devel | Logs for 2013-09-22

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[19:41:04] <alex_jon1> 'lo
[20:16:12] <alex_jon1> can someone else confirm the wiki works now?
[20:18:02] <alex_jon1> cradek, skunkworks, CaptHindsight, archivist_: ^^
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[20:33:42] <andypugh> alex_jon1: I just tried logging in, and it worked (unlike last time I tried)
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[21:08:47] <alex_jon1> andypugh: good, so it's fixed
[21:09:36] <andypugh> Seems ot be. I would need to try again from the PC at work to be completely sure.
[21:09:55] <alex_jon1> it was a pretty stupid bug
[21:10:19] <alex_jon1> who wrote the wiki sftware had a cookie that expired on 8 sept 2013
[21:10:36] <alex_jon1> so trying after that date didn't work anymore, since the cookie was already expired..
[21:24:56] <andypugh> I wonder why that date?
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[22:00:47] <CaptHindsight> alex_jon1: works for me now as well
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[22:05:05] <micges> skunkworks: around?
[22:05:26] <micges> pcw_home: around?
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[22:29:12] <skunkworks> micges: yes>
[22:29:16] <skunkworks> ?
[22:29:36] <micges> tell me what hardware you used to run 7i80
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[22:32:56] <skunkworks> computer wise?
[22:32:58] <micges> I mean what mb and eth board
[22:33:00] <skunkworks> or nic?
[22:33:04] <pcw_home> I have a D525
[22:33:11] <micges> and what system
[22:33:18] <skunkworks> I was using the pro/100 pci card
[22:33:19] <pcw_home> it has a 8139 nic in it also
[22:33:35] <pcw_home> ubuntu 12.04
[22:33:36] <skunkworks> I don't know the motherboards - but I could look monday
[22:33:46] <skunkworks> 12.04 also
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[22:34:51] <micges> skunkworks: ok, ping me then
[22:35:29] <micges> why both of you choose 12.04 for tests?
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[22:36:39] <pcw_home> In my case I already had it running
[22:38:23] <micges> here I have 10.04 + rt8139 + 7i80DB run perfectly for few hours
[22:38:30] <micges> no encoder errors
[22:38:50] <micges> 7i80.read.time is about 250us
[22:39:01] <micges> 7i80.write.time is about 50us
[22:39:18] <pcw_home> is read still made up of multiple packets?
[22:40:08] <micges> no
[22:40:12] <micges> one read for all
[22:40:29] <skunkworks> I tried 10.04 with xenomai and it acted the same.
[22:40:42] <micges> but few random reads left (hard to fix)
[22:41:23] <micges> skunkworks: I odn't have pro/100 board but I can test on e1000
[22:41:57] <micges> maybe problem is sth about eth data flow on different boards
[22:42:57] <pcw_home> Thats seems strange though, I wouls not expect any difference with MAC or OS except maybe timing
[22:43:45] <micges> yes timing is my first suspect
[22:44:35] <pcw_home> I do have V14 firmware but I still need to test it
[22:45:12] <micges> ok, I'm trying again port it to rtai (got new data), then port driver to unified biuld and then fix and improve driver
[22:45:30] <micges> in between rt-preempt kernel is cooking
[22:46:42] <pcw_home> someone (memleak) was possible looking into RTNet on RTAI (I think it was originally written for RTAI)
[22:47:13] <micges> rtnet for rtai is working
[22:47:31] <micges> rtai have lack of part of interface I'm using to boot driver
[22:48:11] <pcw_home> it the timing stuff is robust enough, the read packet should be send-able one wire time before the servo thread on the host
[22:48:21] <pcw_home> if the
[22:48:28] <micges> and I spoke with him and anothr guy how to fix it, at least temporary
[22:49:30] <pcw_home> so the startup scripts/other infrastructure are missing?
[22:50:26] <micges> for now rt_task_join doesn't work
[22:51:12] <micges> it is used to wait after creating rt task to init board
[22:51:40] <micges> any other wait scheme goes into hang or dead loop
[22:54:24] <pcw_home> if there were only a simple synchronous Ethernet hardware access method.
[22:54:26] <pcw_home> Even interrupts are unnecessary overhead for this type of application
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[22:59:14] <pcw_home> I'm am surprised at how robust the 7I80 because of its
[22:59:22] <pcw_home> simple 1 thread synchronous design (too stupid to screw up)
[22:59:23] <pcw_home> I often forget I have some test loopback running on the 7I80 in one window and
[22:59:28] <pcw_home> then run mesaflash in the other to reprogram the 7I80, works flawlessly!
[23:00:07] <micges> great
[23:01:03] <pcw_home> Not that its intended to have multiple masters, it just happens to work
[23:02:19] <micges> it seems it have enough atomic and simple interface for it
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[23:04:25] <pcw_home> Im really curious what the jitter statistics will be in a real system
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[23:05:55] <pcw_home> if they have a small std-deviation, the DPLL filter can do a really good job of filtering the jitter out
[23:09:02] <pcw_home> I did learn that Windows has some very peculiar Ethernet timing
[23:09:04] <pcw_home> (at certain update rates the I/O cycle gets locked to 64 Hz)
[23:18:45] <micges> heh
[23:19:53] <micges> another windows odd behavoiur
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[23:49:40] <pcw_home> I made use of the strange regularity for testing the DPLL
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[23:57:10] <micges> how mesaflash is working under windows for 7i80?
[23:57:19] <micges> any adress problems?
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