Chris,
I am using the user-space Python comp pasted below to get the G20/21 state
out to HAL pins. It looks somewhat similar to what you came up with (which
makes me feel good as I am just starting to learn python and play with
LCNC). I sent it to Gene on Saturday, but I guess he did not like it ;)
I brute forced it buy using the python interface and polling every 50ms and
updating the HAL pins, but I see you used a module GStat, where can I find
some info on that, it looks useful?
Cheers,
Kurt
Here is my code:
#!/usr/bin/env python
import hal, time
import linuxcnc
stat = linuxcnc.stat()
h = hal.component("units")
h.newpin("prog_in", hal.HAL_BIT, hal.HAL_OUT)
h.newpin("prog_mm", hal.HAL_BIT, hal.HAL_OUT)
h.newpin("update_rate", hal.HAL_FLOAT, hal.HAL_IN)
h.ready()
# Set default update rate to 50ms
h.update_rate = .05
try:
while 1:
time.sleep(h.update_rate)
stat.poll()
prog_units = stat.program_units
if prog_units == 1: # Inch
h.prog_in = 1
h.prog_mm = 0
elif prog_units == 2: # Metric
h.prog_in = 0
h.prog_mm = 1
except KeyboardInterrupt:
raise SystemExit
On Mon, Apr 17, 2017 at 2:50 PM, Chris Morley <[email protected]>
wrote:
> I think you are using recent master.
>
> If so this python program should give you what you want.
>
> name it metric_status and put it in your $PATH as per:
>
> http://linuxcnc.org/docs/devel/html/hal/halmodule.html
>
> Creating Userspace Python Components - LinuxCNC.org<http://linuxcnc.
> org/docs/devel/html/hal/halmodule.html>
> linuxcnc.org
> A userspace component begins by creating its pins and parameters, then
> enters a loop which will periodically drive all the outputs from the inputs.
>
>
>
>
> #!/usr/bin/env python
> import hal
> from hal_glib import GStat
> import gobject
> GSTAT = GStat()
>
> def mode_changed(obj, data):
> h['g20'] = not data
> h['g21'] = data
>
> h = hal.component("metric_status")
> h.newpin("g20", hal.HAL_BIT, hal.HAL_OUT)
> h.newpin("g21", hal.HAL_BIT, hal.HAL_OUT)
> h.ready()
>
> GSTAT.connect("metric-mode-changed",mode_changed)
> # work around forced merge error
> GSTAT.merge()
> metric_new = GSTAT.old['metric']
> GSTAT.emit('metric_mode_changed',metric_new)
>
>
> try:
> gobject.MainLoop().run()
> except KeyboardInterrupt:
> raise SystemExit
>
>
> ________________________________
> From: Gene Heskett <[email protected]>
> Sent: April 16, 2017 12:56 AM
> To: [email protected]
> Subject: Re: [Emc-developers] view and mm/inches switching.
>
> On Saturday 15 April 2017 19:58:22 andy pugh wrote:
>
> > On 16 April 2017 at 00:43, Gene Heskett <[email protected]> wrote:
> > > Its a last ditch thought, but not as dynamic as I'd like. I'd like
> > > very much if it was real time as I have used that switch in the
> > > middle of a gcode program more than once.
> >
> > Do you often care about jog step sizes in the middle of the execution
> > of a g-code program?
>
> Perhaps .1% of the time, most often when there is a tool change or 5 in
> the code.
>
> > And do you really want the display switching units when you call a
> > mm-coded subroutine? I think that would actually just be annoying.
>
> Since we can't trace the subroutine at all, and any errors are blamed on
> the parent call, at least the display changing modes could tell us the
> subroutine is running. Its a nearly vanishingly thin excuse to be sure
> though. :(
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> [http://geneslinuxbox.net:6309/gene/pix/EasterSundayCropped2004-1.jpg]<
> http://geneslinuxbox.net:6309/gene>
>
> Gene's Web pages<http://geneslinuxbox.net:6309/gene>
> geneslinuxbox.net
> Welcome to Gene's web pages. Here you will find some of the things that
> make me tick, and that help keep me out of the bars. That is me & the
> missus, Dee (Elladene) I ...
>
>
>
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> The Enhanced Machine Controller (EMC) is a CNC machine controller that
> runs on Linux and is available under the terms of the GNU General Public
> License.
>
>
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