User Defined M-code M1xx Help
- Todd Zuercher
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20 Mar 2015 23:40 #57035
by Todd Zuercher
User Defined M-code M1xx Help was created by Todd Zuercher
I am really proving to myself that I have no programing skills what so ever.
I am trying to build a custom M-code that will read the current value of 2 hal pins, subtract one from the other, then setp the difference between them to "offset.0.offset."
I am trying to build a custom M-code that will read the current value of 2 hal pins, subtract one from the other, then setp the difference between them to "offset.0.offset."
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21 Mar 2015 01:44 #57039
by dgarrett
Replied by dgarrett on topic User Defined M-code M1xx Help
An example script follows.
Notes:
1) the M file must be named with a capital M
2) the M file must be executable (chmod +x Mfilename)
3) the M file must be located according to the rules
see the info on [RS274NGC]USER_M_PATH
in:
www.linuxcnc.org/docs/2.7/html/config/ini_config.html
4) the M file must exist before starting LinuxCNC
Edits:
1) replace pin1_name with the name of your pin1 input
2) replace pin2_name with the name of your pin2 input
3) replace outpin_name with the name of your output pin (offset.0.offset)
4) remove or comment out the 'puts' lines when it is tested and working
Notes:
1) the M file must be named with a capital M
2) the M file must be executable (chmod +x Mfilename)
3) the M file must be located according to the rules
see the info on [RS274NGC]USER_M_PATH
in:
www.linuxcnc.org/docs/2.7/html/config/ini_config.html
4) the M file must exist before starting LinuxCNC
Edits:
1) replace pin1_name with the name of your pin1 input
2) replace pin2_name with the name of your pin2 input
3) replace outpin_name with the name of your output pin (offset.0.offset)
4) remove or comment out the 'puts' lines when it is tested and working
#!/usr/bin/tclsh
set inpin_1 pin1_name
set inpin_2 pin2_name
set outpin outpin_name
#----------------------------------------------------------
package require Hal
set inpin_1_value [hal getp $inpin_1]
set inpin_2_value [hal getp $inpin_2]
set diff [expr $inpin_1_value - $inpin_2_value]
puts "inpin_1= $inpin_1 inpin_1_value= $inpin_1_value"
puts "inpin_2= $inpin_2 inpin_2_value= $inpin_2_value"
puts "outpin = $outpin outpin before=[hal getp $outpin]"
hal setp $outpin $diff
puts "outpin = $outpin outpin after=[hal getp $outpin]"Please Log in or Create an account to join the conversation.
- Todd Zuercher
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21 Mar 2015 02:39 #57040
by Todd Zuercher
Replied by Todd Zuercher on topic User Defined M-code M1xx Help
It works, thank you.
Just curious, what do the puts do?
Just curious, what do the puts do?
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21 Mar 2015 02:48 #57041
by dgarrett
puts --> print to stdout, you will see them if you start from a terminal which is
almost always the best way to debug
Replied by dgarrett on topic User Defined M-code M1xx Help
Just curious, what do the puts do?
puts --> print to stdout, you will see them if you start from a terminal which is
almost always the best way to debug
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