Add HAL Pins to GUI
06 Feb 2024 13:26 - 06 Feb 2024 13:29 #292645
by JT
Add HAL Pins to GUI was created by JT
I have a simple GUI and I'm trying to add a HAL pin.
But after running this and opening up showhal I don't see the pin... what am I missing?
I've grepped all the linuxcnc code and searched the forum for a clue but come up empty handed...
JT
def setup_hal(parent):
c = hal.component("buttons")
c.newpin('out', hal.HAL_BIT, hal.HAL_OUT)
c.ready()But after running this and opening up showhal I don't see the pin... what am I missing?
I've grepped all the linuxcnc code and searched the forum for a clue but come up empty handed...
JT
Last edit: 06 Feb 2024 13:29 by JT.
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:37 #292646
by cmorley
Replied by cmorley on topic Add HAL Pins to GUI
Are you sure the function is being called?
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:43 #292647
by JT
Replied by JT on topic Add HAL Pins to GUI
Thanks for replying Chris.
If I add a print function like this:it prints to the terminal.
JT
If I add a print function like this:
def setup_hal(parent):
print('here')
c = hal.component("buttons")
c.newpin('out', hal.HAL_BIT, hal.HAL_OUT)
c.ready()JT
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:43 #292648
by JT
Replied by JT on topic Add HAL Pins to GUI
There is an odd component I think showing up in halshow.
JT
JT
Attachments:
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:45 #292649
by JT
Replied by JT on topic Add HAL Pins to GUI
Hmm it shows up even if I don't run that function so I assume it's part of Lcnc.
JT
JT
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:54 - 06 Feb 2024 13:55 #292654
by cmorley
Replied by cmorley on topic Add HAL Pins to GUI
I wonder if it's because c is a local variable and is garbage collected. try:
c= None
def setup_hal(parent):
print('here')
global c
c = hal.component("buttons")
c.newpin('out', hal.HAL_BIT, hal.HAL_OUT)
c.ready()
Last edit: 06 Feb 2024 13:55 by cmorley.
The following user(s) said Thank You: JT
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:55 #292655
by JT
Replied by JT on topic Add HAL Pins to GUI
If I add a test to see if the component exists it returns True
JT
def setup_hal(parent):
c = hal.component("buttons")
c.newpin('out', hal.HAL_BIT, hal.HAL_OUT)
c.ready()
print(hal.component_exists("buttons"))JT
Please Log in or Create an account to join the conversation.
06 Feb 2024 13:58 #292657
by JT
Replied by JT on topic Add HAL Pins to GUI
Chris, thanks so much. You nailed it, c was garbage collected!
JT
JT
The following user(s) said Thank You: cmorley
Please Log in or Create an account to join the conversation.
Time to create page: 0.215 seconds