#linuxcnc-devel | Logs for 2016-01-23

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[13:09:10] <jthornton-> how do you add an apt source from the command line?
[13:10:06] <jthornton-> step 5 is missing something http://linuxcnc.org/docs/2.7/html/getting-started/getting-linuxcnc.html#_installing_on_debian_wheezy_with_preempt_rt_kernel
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[14:09:04] <jthornton-> and google says sudo add-apt-repository "deb...
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[14:46:06] <KGB-linuxcnc> 03John Thornton 052.7 a0123bc 06linuxcnc 10docs/src/getting-started/getting-linuxcnc.txt Docs: clear up installing preempt-rt kernel * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=a0123bc
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[15:53:25] <jepler> PCW: I haven't done anything to try to induce errors yet, but I still get a bunch of error messages when I start my hal threads. also, I notice that in the pinout summary everything is still just an IOPort, apparently no ports were reserved for the sserial which is weird
[15:53:29] <jepler> http://pastebin.com/NJbHUH45
[15:54:37] <jepler> is 7i92 sserial thought to work, or is that something else that was never tested yet?
[15:56:34] <pcw_home> It should work (Ethernet sserial works fine)
[15:57:05] <pcw_home> power problem ?
[15:57:30] <jepler> I am using a 5V1A power supply into the 7i92, then cable-powering everything else
[15:57:56] <jepler> is there a good location on the 7i73 to check my voltage?
[16:00:05] <pcw_home> not sure, probably a regulator pin
[16:01:22] <pcw_home> It should not be very picky however ( its all 3.3V from a LDO regulator so should be OK down to 4V or so )
[16:01:28] <jepler> C18 near the RJ jack measures a good 5.01V on my meter. if it dips when starting linuxcnc, I don't see it on the readout
[16:02:01] <jepler> and C19 3.29v
[16:03:02] <jepler> shouldn't I expect that in the pinout that linuxcnc shows at startup, the pin use is not "IOPort" for all pins?
[16:03:50] <pcw_home> maybe signal integrity issue with cabling? whats between the 7I92 and 7I74?
[16:04:06] <jepler> ribbon cable under 1'
[16:06:29] <pcw_home> ribbon cables are not great for the 7I74 especially (50 pin/ 7I44 are fine, parallel port 25 pin pinout is not good)
[16:07:19] <jepler> I was hoping a short one would be OK. My junk box only turned up DB25 M-F cables so far, plus this cable.
[16:08:23] <pcw_home> did you compile the bitfile yourself?
[16:09:20] <jepler> yes, but starting with source from 7i92.zip, not hostmot2-firmware
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[16:10:03] <pcw_home> i have a patched UART8 module that gets along with a 10 foot flat cable here
[16:10:42] <jepler> (I don't see any 7i74 firmwares in 7i92.zip anyway)
[16:10:52] <jepler> Ok, I can rebuild with that pretty easily
[16:11:29] <jepler> oh I see 7i92_7i77_7i74D.bit but I wonder if the 7i74 is on the right connector (I need it on P1 because of my cable limitations)
[16:12:36] <jepler> the detection step to find the 7i73 seems to work every time, which makes me want to think the cabling is fine
[16:13:22] <pcw_home> 7i77_7I74 means 7I77 onDB25, 7I74 on header
[16:13:59] <pcw_home> looks like it blew up in the detection part
[16:14:07] <jepler> oh it does?
[16:14:52] <pcw_home> the fact that the I/O pins are not marked as sserial suggests that to me
[16:15:28] <jepler> OK
[16:15:28] <jepler> Board hm2_7i92.0.7i73.1.0 Hardware Mode 0 = nokeyboardnodisplay
[16:15:52] <jepler> these lines, which seemed to be the same everytime, made me think it was doing something
[16:19:41] <pcw_home> yeah its working up to a point
[16:20:58] <pcw_home> Also those errors dont seem like the ones with noise issues
[16:22:54] <pcw_home> maybe try another sserial card (the 7I69 is also cable powered)
[16:23:50] <pcw_home> wonder what the remote fault was?
[16:25:21] <jepler> Board hm2_7i92.0.7i69.1.0 Hardware Mode 0 = mesa_pinout
[16:25:22] <jepler> ...
[16:25:45] <jepler> pins come up as all IOPort, then communication errors
[16:27:45] <pcw_home> but the no id error is only check at startup so it didn't get past that
[16:27:52] <pcw_home> checked
[16:28:42] <jepler> hm2/hm2_7i92.0: Smart serial card hm2_7i92.0.7i69.1.0 error = (14) No Remote ID
[16:28:45] <jepler> this one?
[16:29:00] <pcw_home> Yes
[16:31:25] <pcw_home> try channel 7
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[16:35:11] <jepler> Board hm2_7i92.0.7i69.1.7 Hardware Mode 0 = mesa_pinout
[16:35:18] <jepler> moving the cable moves where the board is detected
[16:37:18] <pcw_home> so not sure if this is a SI issue with the flat cable or some generic problem
[16:38:21] <jepler> I assume with nothing connected the I/Os shold be TRUE ?
[16:39:02] <pcw_home> yes
[16:40:12] <jepler> .. I reverted sserial.c only to back before micges's error handling changes. I get no errors printed, including when I unplug the cable, but the I/Os all read as false
[16:40:57] <pcw_home> thats weird
[16:41:20] <pcw_home> updated files to improve SSLBPs RX UARTs noise immunity:
[16:41:21] <pcw_home> http://freeby.mesanet.com/uartr8.vhd
[16:41:23] <pcw_home> http://freeby.mesanet.com/sserialwa.vhd
[16:42:23] <jepler> on the 7i74 is CR2 some sort of activity indicator?
[16:42:28] <pcw_home> if its a flat cable SI issue, recompiling with these will fix the problem
[16:43:16] <pcw_home> CR2 is the enable on channel 7 (0..6 are RS-422 only, channel 7 can be RS-485)
[16:43:54] <jepler> OK, I see that light go on only during initialization
[16:45:04] <jepler> the same for CR3 on the 7i69
[16:45:24] <jepler> rebuilding my fw now
[16:46:54] <pcw_home> yeah it failed during initialization so reverted to GPIO
[16:48:09] <jepler> whatever point it's failing at, it's not saying anything at that moment
[16:48:20] <jepler> there's nothing that looks like an error between Board hm2_7i92.0.7i69.1.7 Software Mode 4 = bidir_encoder
[16:48:24] <jepler> and hm2/hm2_7i92.0: 34 I/O Pins used:
[16:48:24] <jepler> hm2/hm2_7i92.0: IO Pin 000 (P2-01): IOPort
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[16:57:52] <pcw_home> Yeah without errors should be something like:
[16:57:54] <pcw_home> hm2/hm2_7i76e.0: IO Pin 010 (P1-07): Smart Serial Interface #0, pin TxData0 (Output)
[16:57:55] <pcw_home> hm2/hm2_7i76e.0: IO Pin 011 (P1-08): Smart Serial Interface #0, pin RxData0 (Input)
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[17:06:26] <jepler> OK, good to know
[17:06:33] <jepler> that's with our 2.7 branch?
[17:06:48] <jepler> I'm committing a cardinal sin, which is changing multiple things at once
[17:07:05] <jepler> I have a theory that the problem is this: I am using a 2x7i74 config
[17:07:22] <jepler> the 26-pin connector is the 2nd 7i74, with nothing on the first one
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[17:07:46] <jepler> in the hal driver we have this assumption that we always use the lowest-number instances of anything we use
[17:07:54] <jepler> I think that's confusing things
[17:08:21] <pcw_home> Yeah thats probably never been tried
[17:08:30] <jepler> so I'm also changing my pinout around at the same time as I'm putting in your noise-immune vhd files
[17:10:17] <pcw_home> Yeah thats 2.7
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[17:11:35] <jepler> hm2/hm2_7i92.0: IO Pin 028 (P1-08): Smart Serial Interface #0, pin RxData7 (Input)
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[17:12:28] <jepler> halcmd: addf hm2_7i92.0.read-request thread1
[17:12:28] <jepler> halcmd: rtapi_app: caught signal 11 - dumping core
[17:12:30] <jepler> umm that's not good
[17:15:45] <jepler> .. unrelated though
[17:16:10] <jepler> .. if you have started your threads already, adding .read-request crashes rtapi_app
[17:16:46] <jepler> halcmd: start
[17:16:50] <jepler> hm2/hm2_7i92.0: Num Auto = 1
[17:16:50] <jepler> hm2/hm2_7i92.0: Normal Start: Writing 00000000 to 5d1c
[17:16:50] <jepler> hm2/hm2_7i92.0: Tag-All = 80
[17:17:08] <jepler> and I have a blinking green light on the 7i69
[17:17:11] <jepler> so things seem better
[17:17:41] <jepler> yep it's communicating now
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[17:18:52] <maxcnc> hi what is sai for that wont let me use GET_MASHINE_UNOFFSET_X
[17:19:05] <maxcnc> uninitializied
[17:19:17] <jepler> halcmd: setp hm2_7i92.0.stepgen.00.steplen 1000
[17:19:20] <jepler> halcmd: setp hm2_7i92.0.stepgen.00.control-type 1
[17:19:20] <jepler> halcmd: setp hm2_7i92.0.stepgen.00.enable 1
[17:19:20] <jepler> halcmd: setp hm2_7i92.0.stepgen.00.velocity-cmd 1000
[17:19:24] <jepler> hm2/hm2_7i92.0: Smart serial card hm2_7i92.0.7i69.0.7 error = (13) Communication error
[17:19:37] <jepler> OK, and I think I can provoke the problem
[17:20:42] <maxcnc> jepler: we like this ->error = (13) Communication error
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[18:13:59] <jepler> PCW: do I have to do some kind of register write to clear a fault bit?
[18:16:36] <pcw_home> No, but communication errors (bit 13) should be cleared every DOIT
[18:16:38] <pcw_home> and only set when a new communication error occurs
[18:18:51] <pcw_home> remote errors are ( only to be checked when bit 8 is set) are mostly fatal so should probably only be reported once
[18:25:20] <jepler> on the hal side what I think I'm seeing is that some error bits get set (e.g., 0x...09) but that same error value 0x...09 is read every time after that
[18:25:26] <jepler> cs register changed 0x00000000 -> 0x003b0000
[18:25:26] <jepler> cs register changed 0x003b0000 -> 0x00420000
[18:25:29] <jepler> halcmd: setp hm2_7i92.0.stepgen.00.enable 1
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[18:25:42] <jepler> cs register changed 0x00420000 -> 0x00422009
[18:25:42] <jepler> hm2/hm2_7i92.0: [it 7311] Smart serial card hm2_7i92.0.7i69.0.7 error = (13) Communication error
[18:25:45] <jepler> hm2/hm2_7i92.0: [it 7311] Smart serial card hm2_7i92.0.7i69.0.7 error = (3) Timeout
[18:25:48] <jepler> hm2/hm2_7i92.0: Smart Serial Error: port 0 channel 7. You may see this error if the FPGA card read thread is not running. This error message will not repeat.
[18:25:51] <jepler> hm2/hm2_7i92.0: [it 7312] Smart serial card hm2_7i92.0.7i69.0.7 error = (13) Communication error
[18:25:54] <jepler> hm2/hm2_7i92.0: [it 7312] Smart serial card hm2_7i92.0.7i69.0.7 error = (3) Timeout
[18:37:56] <pcw_home> does bit 13 stay set ?
[18:43:32] <jepler> yes, it looks that way
[18:43:39] <jepler> I put a raw read on the register
[18:43:39] <jepler> setp hm2_7i92.0.raw.read_address 0x5d1c
[18:45:03] <jepler> halscope is not too useful for binary-encoded values, but I can see that it says the same thing as my debug prints: the register reads as 0x00420000 until a fault occurs, then it changes to 0x00422009 until the fault limit is hit. then it reads 0x0000C100
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[18:56:17] <jepler> afk
[19:25:16] <pcw_home> AFAIK bit 13 is cleared every doit and only set if a new error occurs
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[20:36:04] <jepler> *inst->command_reg_write = 0x1000 | inst->tag;
[20:36:24] <jepler> it looks like the driver is still sending a doit command as long as the limit isn't hit
[20:38:47] <pcw_home> it should ( and whether it should ever stop is somewhat questionable )
[20:42:55] <jepler> this clear of the error register is something that's happening in the embedded microcontroller's program?
[20:43:28] <pcw_home> Looking at the SSLBP code Bit13 is set on any detected error but cleared every doit
[20:44:14] <pcw_home> almost all bits but 13 are sticky
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[20:48:25] <jepler> I do see your comment
[20:48:25] <jepler> ;minorrevision 22
[20:48:31] <jepler> ;chanerror is cleared at start or doit
[20:49:10] <pcw_home> if bit 13 is not behaving this way its a bug, and the workaround is to not interrogate
[20:49:12] <pcw_home> the error bits unless you get transfer failed error (a 1 bit in the data register for the affected channel)
[20:49:14] <pcw_home> I think micges said this was done in 2.6
[20:49:49] <pcw_home> its hard to tell without generating just one error
[20:49:51] <jepler> can I easily check just to make sure my firmware's minor revision is above 22?
[20:50:14] <jepler> (and that was a long time ago, these sources have you at minorrevision 42)
[20:50:18] <pcw_home> theres nothing that old floating around
[20:50:23] <jepler> OK
[20:50:58] <jepler> hm2/hm2_7i92.0: Smart Serial Firmware Version 43
[20:51:20] <jepler> this number? OK, I guess I don't have an old version then
[20:52:30] <jepler> well I'd better figure out how to capture the right packets to prove whether I'm sending a doit after the error
[20:52:33] <jepler> afk again
[20:52:53] <pcw_home> No, I think anyone updating to 2.7 will get upgraded to 43 because they will likely have
[20:52:55] <pcw_home> old remotes that need updating and only SSLBP >V35 knows how to upgrade remote firmware
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[20:53:40] <pcw_home> and linuxcnc 2.7 complains about the remote version if old (<14)
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[23:31:18] <JT-Shop> I wonder if I move the 7i77 out of the drive cabinet my sserial errors will go away?
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[23:35:40] <pcw_home> Theres something funny about your situation since a limit switch closure triggers an error
[23:35:42] <pcw_home> ( different than say people with a Estop --> contactors dropping out causing a error )
[23:36:37] <pcw_home> did you try grounding the 24V common?
[23:40:29] <JT-Shop> I don't think I have
[23:42:02] <JT-Shop> pcw_home: did you get my email from today?
[23:42:22] <pcw_home> let me check
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[23:50:13] <jepler> pcw_home: 81c2 005b 8010 0000 is writing DOIT, isn't it? in this tcpdump it looks like LinuxCNC sends DOIT at 17:25:11.114077 after error bits are set in the packet at 17:25:11.114038
[23:50:17] <jepler> http://paste.debian.net/367457/
[23:50:43] <jepler> error bits still set in the packet at 17:25:11.115039
[23:58:23] <pcw_home> Hmm thats surprising, is it possible there are more than one error generated?
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