Set HAL-Pin Values by Python Script
19 Feb 2018 12:51 #106167
by Thom
Set HAL-Pin Values by Python Script was created by Thom
Hi,
I try to Set a Hal-Pin Value in a Method of a Python script, associated with Glade VCP.
Example Python Script:
What Method or Syntax could i use?
Please help me,
Thomas Kümmel
I try to Set a Hal-Pin Value in a Method of a Python script, associated with Glade VCP.
Example Python Script:
#!/usr/bin/env python
import gtk
import os
import hal
import hal_glib
import linuxcnc
class HandlerClass:
def __init__(self, halcomp, builder, useropts):
self.halcomp = halcomp
self.builder = builder
#generate Hal Pin
self.SPMCLAMP = hal_glib.GPin(halcomp.newpin('USR_SPMCLAMP', hal.HAL_BIT, hal.HAL_OUT))
#generate Button Click Event
self.BTN_SPMUNCLAMP_auto = self.builder.get_object('BTN_SPMUNCLAMP_auto')
self.BTN_SPMUNCLAMP_auto.connect("clicked", self._on_BTN_SPMUNCLAMP_auto_clicked)
def _on_BTN_SPMCLAMP_auto_clicked(self, event) :
print "Method is activ" #work
SPMCLAMP = True #Dont`t work (No effekt)
SPMCLAMP.set_active(True) #Dont`t work (Error)
SPMCLAMP.set_value(True) #Dont`t work (Error)
What Method or Syntax could i use?
Please help me,
Thomas Kümmel
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- Todd Zuercher
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19 Feb 2018 13:55 #106169
by Todd Zuercher
Replied by Todd Zuercher on topic Set HAL-Pin Values by Python Script
Sorry I'm not going to be much help since I don't get programming Python. But I was able to bumble through creating a python script to work with my GladeVCP that does what I need it to and doesn't set too many error warnings by copying off and adapting of examples in the documentation and JT's tutorials. Mine creates a couple of hal pins. I don't understand the code I made any why it works, or why yours doesn't. I am not going to post my code unless you really want it, because I can't begin to explain it. The pins I needed to create were hal-ins that I am using to control the state of some radio buttons on the VCP.
Just curious why you need the hal pin out? Most of the hal widgets for GladeVCPs create their own hal pins automatically so you don't need to put them in the python script.
Just curious why you need the hal pin out? Most of the hal widgets for GladeVCPs create their own hal pins automatically so you don't need to put them in the python script.
The following user(s) said Thank You: Thom
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19 Feb 2018 14:23 #106171
by Thom
Replied by Thom on topic Set HAL-Pin Values by Python Script
Thank you Todd for fast reply,
My Python Skills aren`t very well too.
My main calculations i write in a "HAL Component" in C.
but it is laborious to connect every Button, LED, ... in The PostGUI, the Hal File and define in the component File
But unfortunatualy i haven`t found a way to access Glade and the Hal-Layer with a C-Script direct.
For easy HALButtons, glade create automatic HAL-Pins,
But for eg. TreeView and ListStore Objects, they don`t.
But how to get These Values ( Bit and Int) to my C-HAL Component?
My Python Skills aren`t very well too.
My main calculations i write in a "HAL Component" in C.
but it is laborious to connect every Button, LED, ... in The PostGUI, the Hal File and define in the component File
But unfortunatualy i haven`t found a way to access Glade and the Hal-Layer with a C-Script direct.
For easy HALButtons, glade create automatic HAL-Pins,
But for eg. TreeView and ListStore Objects, they don`t.
But how to get These Values ( Bit and Int) to my C-HAL Component?
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19 Feb 2018 21:40 - 19 Feb 2018 21:41 #106190
by cmorley
use SOME_PIN_REFERENCE.get() for get the value of a pin
Chris M
Replied by cmorley on topic Set HAL-Pin Values by Python Script
def _on_BTN_SPMCLAMP_auto_clicked(self, pin_reference) :
print "Method is activ" #work
self.SPMCLAMP.set(True) # this works with a absolute reference to the pin
pin_reference.set(True) # this works with an indirect reference to the pin (uses the pin_reference from the method)
use SOME_PIN_REFERENCE.get() for get the value of a pin
Chris M
Last edit: 19 Feb 2018 21:41 by cmorley.
The following user(s) said Thank You: Thom
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19 Feb 2018 21:56 #106192
by cmorley
linuxcnc.org/docs/2.7/html/hal/halmodule...l#_helpful_functions
hal.connect("pinname","signal_name")
hal.new_sig("signalname",hal.HAL_BIT)
but you would need a pretty good reason to use it - it's not as flexible as using HAL files.
HALbuttons etc are specifically made general widgets for interfacing HAL to pyGTK.
there are a lot of HAL widgets, I haven't heard anyone wishing for more widgets in a while.
If there are lacking HAL widgets, one would need to build them. We are always interested in new code.
Treeview and liststore are used inside of a parent widget, so I'm not sure how one could add HAL pins to them in a general way.
Combobox widgets use liststores IIRC and I believe there is a HALified combobox - this would be the usual way.
Hard to elaborate more without know what you are trying to do![:) :)](/media/kunena/emoticons/smile.png)
Chris M
Replied by cmorley on topic Set HAL-Pin Values by Python Script
It's possible to do something like what you want- there are some recently documented commands for the python component.Thank you Todd for fast reply,
But unfortunatualy i haven`t found a way to access Glade and the Hal-Layer with a C-Script direct.
linuxcnc.org/docs/2.7/html/hal/halmodule...l#_helpful_functions
hal.connect("pinname","signal_name")
hal.new_sig("signalname",hal.HAL_BIT)
but you would need a pretty good reason to use it - it's not as flexible as using HAL files.
For easy HALButtons, glade create automatic HAL-Pins,
But for eg. TreeView and ListStore Objects, they don`t.
But how to get These Values ( Bit and Int) to my C-HAL Component?
HALbuttons etc are specifically made general widgets for interfacing HAL to pyGTK.
there are a lot of HAL widgets, I haven't heard anyone wishing for more widgets in a while.
If there are lacking HAL widgets, one would need to build them. We are always interested in new code.
Treeview and liststore are used inside of a parent widget, so I'm not sure how one could add HAL pins to them in a general way.
Combobox widgets use liststores IIRC and I believe there is a HALified combobox - this would be the usual way.
Hard to elaborate more without know what you are trying to do
![:) :)](/media/kunena/emoticons/smile.png)
Chris M
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20 Feb 2018 11:54 #106227
by Thom
Replied by Thom on topic Set HAL-Pin Values by Python Script
Thank you a lot, cmorley
Thats the Key:Oh my God, it is so easy, if you know it ![:woohoo: :woohoo:](/media/kunena/emoticons/w00t.png)
Here is my way to get the selected row of a Treeview in a HAL-Pin:
The Treeview and the Liststore are created in Glade.
The vlaues of the Liststore are also preset in Glade.
Thats the Key:
self.Pinname.set(Value)
![:woohoo: :woohoo:](/media/kunena/emoticons/w00t.png)
Here is my way to get the selected row of a Treeview in a HAL-Pin:
#!/usr/bin/env python
import gtk
import os
import hal
import hal_glib
import linuxcnc
class HandlerClass:
def __init__(self, halcomp, builder, useropts):
#import objects from Glade File
self.USR_Liststore = self.builder.get_object('USR_Liststore')
self.USR_Treeview = self.builder.get_object('USR_Treeview')
#create Hal Pin
self.HAL_selectedrow = hal_glib.GPin(halcomp.newpin('Test', hal.HAL_S32, hal.HAL_OUT))
#create Event Handler
USR_Treeview_Select = self.USR_Treeview.get_selection()
USR_Treeview_Select.connect("changed", self._on_USR_Treeview_selection_change)
#Global Variables
selecteditem = 0
#Event Handler
def _on_USR_Treeview_selection_change(self, tree_selection):
model, treeiter = tree_selection.get_selected()
if treeiter is not None : # if any row is selected
self.selecteditem = model[treeiter][0]
self.HAL_selectedrow.set(self.USR_Liststore[self.selecteditem][0])
#boiler code
def get_handlers(halcomp,builder,useropts):
return [HandlerClass(halcomp,builder,useropts)]
The Treeview and the Liststore are created in Glade.
The vlaues of the Liststore are also preset in Glade.
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20 Feb 2018 12:00 #106229
by Thom
Replied by Thom on topic Set HAL-Pin Values by Python Script
I`ve heard about the funktions:
hal.connect("pinname","signal_name")
hal.new_sig("signalname",hal.HAL_BIT) , ...
but if i write this in Python or the following in the HAL File
net signalname pinname
does not make a difference
hal.connect("pinname","signal_name")
hal.new_sig("signalname",hal.HAL_BIT) , ...
but if i write this in Python or the following in the HAL File
net signalname pinname
does not make a difference
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20 Feb 2018 19:05 #106246
by cmorley
As I said one needs a good reason to use this - for instance Pncconf used it to automatically build a test screen on objects that could be different each time (in fact that is what they were added for)
I also wanted to point out the get() and set() functions work because you used hal_glib to make the pins.
if you make pins like in the manual here:
linuxcnc.org/docs/2.7/html/hal/halmodule.html
the get() and set() functions are not available.
Chris M
Chriis
Replied by cmorley on topic Set HAL-Pin Values by Python Script
I`ve heard about the funktions:
hal.connect("pinname","signal_name")
hal.new_sig("signalname",hal.HAL_BIT) , ...
but if i write this in Python or the following in the HAL File
net signalname pinname
does not make a difference
As I said one needs a good reason to use this - for instance Pncconf used it to automatically build a test screen on objects that could be different each time (in fact that is what they were added for)
I also wanted to point out the get() and set() functions work because you used hal_glib to make the pins.
if you make pins like in the manual here:
linuxcnc.org/docs/2.7/html/hal/halmodule.html
the get() and set() functions are not available.
Chris M
Chriis
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