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[02:23:34] <cradek> jepler: I set out to fix gh30 (g53 when rotated). fixing precisely gh30 is easy because in steps 3 and 4 you specify both X and Y. but in general, when rotated and doing g53 with only one of x or y specified, I don't know what the behavior should be.
[02:25:09] <jepler> My intuition is that if you only specify G53X then only machine X should move, Y shouldn't
[02:25:56] <cradek> so you'll end up with both X and Y coordinates changing in your rotated system
[02:26:31] <cradek> that is one of the two designs that feel right
[02:26:40] <jepler> yes
[02:27:28] <jepler> I imagine that G53 is like a sequence that suspends G92, switches to a modal coordinate system with no offsets or rotation, does the motion, and then puts everything back
[02:28:00] <cradek> (and tool offset) yeah, I think that feels right
[02:28:34] <jepler> is G53 forbidden in cutter comp?
[02:28:48] <cradek> so in AXIS with the system rotated, you expect g0 g53 x__ to make a horizontal move on the screen
[02:28:59] <jepler> yeah
[02:29:29] <jepler> .. you said it's one of two designs that feels right. do you think the design which makes only the X on the DRO change also feels right? or is there some other option I didn't consider?
[02:30:28] <cradek> yes it is forbidden in cutter comp
[02:30:40] <cradek> yes that is the other one I considered
[02:30:58] <cradek> because in general, if you don't specify a Y word, Y shouldn't change
[02:31:30] <cradek> but I think you are right because g53 docs say "to move in the machine coordinate system, ..." and that system doesn't rotate
[02:32:21] <cradek> I chose (and, coincidentally, failed to implement) design #2 without really thinking it through
[02:33:51] <cradek> seems like they are both tricky to do :-/
[02:34:59] <cradek> what - g91 is broken too - I guess I don't understand this yet
[02:38:26] <cradek> ugh, I tried to write find_ends's g53 case in terms of find_relative, but find_relative has got to be broken too, because it rotates both offsets
[02:42:10] <cradek> ok, it turns out this isn't going to be fixed tonight
[02:43:20] <cradek> rotation is so nice to have, but I think adding it was a mistake
[02:43:57] <skunkworks> that is what cad is for. (it is neat - but I think I have only used it a hand full of times)
[02:44:46] <skunkworks> but you can't take it away now... ;)
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[03:59:57] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15SebKuzminsky closed issue #39: ja: Axis GUI DRO "homed" icons wrongness 02
https://github.com/LinuxCNC/linuxcnc/issues/39
[04:01:57] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15SebKuzminsky closed issue #40: ja: surprise switch to World mode when turning on 02
https://github.com/LinuxCNC/linuxcnc/issues/40
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[04:21:21] <seb_kuzminsky> i was really glad to have rotation exactly one time, when i'd programmed a high-aspect-ratio part in an orientation that didnt fit my high-aspect-ratio work envelope
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[06:17:52] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15SebKuzminsky commented on issue #38: False alarm. This problem was due to a bad PS/2 to USB keyboard adapter on this particular computer. Yes, really.... 02
https://github.com/LinuxCNC/linuxcnc/issues/38#issuecomment-185044581
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[13:43:46] <jepler> cmorley: pncconf's xml thing, is it supposed to read the .xml files that come with hostmot2-firmware packages? or is it the converter for mach configuration files?
[13:45:36] <jepler> .. at a glance, mesaflash xml files and hostmot2-firmware xml files are similar but not identical
[13:46:01] <jepler> I don't know what software, if any, is the consumer of those xml files
[13:47:42] <mozmck> I think pncconf only reads pncconf xml files.
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[13:52:24] <jepler> actually I think pncconf does read hostmot2-firmware .xml files from /lib/firmware
[13:53:31] <jepler> pncconf.py:def mesa_firmware_search
[13:53:45] <mozmck> ah, ok.
[13:55:29] <jepler> so I wonder if the problem is that there's no way to read a specific .xml file, or if the problem is the differences between the hostmot2-firmware xml format and the mesaflash xml format
[13:55:43] <jepler> and micges isn't around
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[15:12:07] <pcw_home> I think the main problem is that there's no standard include file for pin names
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[16:22:13] <seb_kuzminsky> all open-source workflow from verilog to ice40 lattice fpga bitstream:
http://www.clifford.at/icestorm/
[16:22:35] <seb_kuzminsky> a couple of the guys at the hackspace have been playing with it
[16:23:00] <seb_kuzminsky> flash over usb, ~160 I/Os brought out
[16:24:16] <mozmck> 160?
[16:24:28] <seb_kuzminsky> the board is $43 in qty 1
[16:24:34] <seb_kuzminsky> http://www.latticestore.com/default.aspx?tabid=417&searchid=1&searchvalue=ice40hx8k-b-evn
[16:24:52] <seb_kuzminsky> mozmck: yeah, 4 40-pin headers
[16:25:46] <mozmck> oh, you must be talking about the iCE20-HX8K breakout board - I was looking at the iCEstick
[16:26:12] <seb_kuzminsky> yeah
[16:26:34] <seb_kuzminsky> the hx8k is about the same size the the Xilinx Spartan on the 7i43-400, iiuc
[16:26:41] <seb_kuzminsky> 8k logic cells
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[16:27:08] <seb_kuzminsky> no vhdl front end for the syntesizer, so getting hm2 to run on it is going to take some work
[16:29:03] <mozmck> any idea how to best call a bash script from C/C++ that needs root access?
[16:29:29] <seb_kuzminsky> system("sudo $HOME/Downloads/sketchy.sh")
[16:29:31] <cradek> there is no secure way to do that
[16:29:57] <seb_kuzminsky> cradek said it much more clearly than me
[16:30:04] <cradek> can you fix it so it doesn't need root access?
[16:30:24] <mozmck> Not too worried about secure - but what's insecure about it?
[16:31:26] <cradek> you can trick a shell in many ways. one very simple way is to manipulate its PATH, so it executes the commands you want instead of the ones the author intended
[16:31:43] <mozmck> No, it needs root access.
[16:32:54] <mozmck> Well, this is called from a GUI and they will have to enter a password. Someone could always replace the script with a different one, but that's not a concern. They could do anything if they can do that.
[16:34:22] <mozmck> I tried essentially popen("echo password | sudo -S /path/to/script.sh", "r") and my test script just does ls, but I get a segmentation fault.
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[16:37:43] <seb_kuzminsky> mozmck: a drawback with "echo $PASSWORD" is that anyone can run "ps" and see the argument to echo
[16:38:06] <seb_kuzminsky> i think sudo reopens the terminal to escape the pipe, precisely to discourage this use
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[16:38:58] <mozmck> hmm, well this is not run from a terminal
[16:39:34] <seb_kuzminsky> it may not be started from a terminal window, but each process has something called a "controlling terminal", which is just where its stdin/stdout are connected
[16:39:35] <mozmck> I could see that being a problem on a multi-user computer, but these are not.
[16:40:08] <mozmck> I see. I have a lot to learn about all that.
[16:40:41] <seb_kuzminsky> i recommend doing what i did: break your leg when you're 19, then spend the summer in bed reading Advanced Programming in the Unix Environment
[16:41:23] <mozmck> Basically I've written a script to find a connected 7i92 card, and set up the eth interface it's connected to in /etc/network/interfaces. I'd like to run this from a GUI if possible.
[16:41:31] <mozmck> Yeah, it's a little late for that now :-)
[16:41:46] <mozmck> I do read all I can when I get a chance though.
[16:42:12] <seb_kuzminsky> that sounds like a useful project
[16:42:42] <seb_kuzminsky> doesn't hm2_eth do a bunch of setup itself? iptables and what not?
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[16:44:55] <mozmck> Yes, but this sets up the eth interface. We are using 10.10.10.10 for the cards, so I just set the iface to static 10.10.10.1 and run mesaflash to see if there is a 7i92 there :-) It's a bit of a hack, but it works. Then I write the settings to the interfaces file.
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[16:54:39] <jepler> SUDO_ASKPASS=/usr/bin/ssh-askpass sudo -A false
[16:54:49] <jepler> on my system, this uses a graphical prompt for root's password to run 'false'
[16:54:56] <jepler> er, for your sudo password, not root's password
[16:55:04] <seb_kuzminsky> nice
[16:55:33] <jepler> but note that linuxcnc doesn't Depend: on sudo or ssh-askpass
[16:57:33] <mozmck> Yeah, I tried first with pkexec which does use a graphical prompt as well, but had the same problem. I may just not call the script from my GUI.
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[18:45:16] <maxcnc> Hi i saw today there is a hy_vfd component is there a example somwhere cand find one
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[19:02:49] <jepler> "man hy_vfd" in a terminal for the documentation. no, I don't think there's an example.
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