toggle2nist description

jensor
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9 years 8 months ago #87570 by jensor

toggle2nist description was created by jensor

I don't know why the man page for toggle2nist does not give a complete description for understanding toggle2nist. I ran some tests with it to find out exactly how it behaves.
When is-on changes state it always drives both outputs to false. then only one toggle is allowed on in pin per attached truth table.

Looks like i'm not allowed to attach my truth table so I'll try to explain it. If in is false when is-on goes false, off goes true.If in is true when is-on goes true, on goes true.

toggle2nist description.xlsx

Here I'll try to build a table but I see the html screws up the spacing.

toggle2nist

is-on	in	on	off	output
0	0	0	0	0
0	1	0	1
0	0	0	1	note: no change
0	1	0	2	note: no change
1	1	0	0
1	0	1	0
1	1	1	0	no change

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bkt
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9 years 8 months ago #87611 by bkt

Replied by bkt on topic toggle2nist description

at these link ...

Code:

component toggle2nist "toggle button to nist logic";

description
"""
toggle2nist can be used with a momentary push button connected to a
toggle component to control a device that has seperate on and off inputs
and has an is-on output. 
If in changes states via the toggle output
  If is-on is true then on is false and off is true. 
  If is-on is false the on true and off is false.
""";

pin in  bit in;
pin in  bit is_on;
pin out bit on;
pin out bit off;
variable int old_in;
variable int to_state=0;
function _ nofp;
license "GPL";
;;
FUNCTION(_)  {
if (in!=old_in) /* a toggle has occurred */ {
    if (is_on) {   /* turn OFF if it's on */
        on=0;
        off=1;
        to_state=0;
    }
    else if (!is_on) { /* turn ON if it's off */
        on=1;
        off=0;
        to_state=1;
    }
}
else {
/* reset pins when we see the desired state */
    if (to_state==is_on) {
        on=0;
        off=0;
    }
}
old_in=in;
}

toggle2nist code ....

I hope these help.
Giorgio

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jensor
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9 years 8 months ago #87658 by jensor

Replied by jensor on topic toggle2nist description

Thank you for your comments, Giorgio however I am not skilled in the programming language in your response.
I think a better description for my understanding would be:
A reset condition occurs whenever "is-on" changes state. When in the reset condition both outputs are false.
If in the reset condition "is-on" is false, a change of state of "in" changes "on" to true.
If in the reset condition "is-on" is true, a change of state of "in" changes "off" to true.
Further changes in output will not occur until unit is reset by change of state of "is-on"

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bkt
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9 years 8 months ago #87666 by bkt

Replied by bkt on topic toggle2nist description

toggle2nist can be used with a momentary push button connected to a
toggle component to control a device that has seperate on and off inputs
and has an is-on output.
If in changes states via the toggle output
If is-on is true then on is false and off is true.
If is-on is false the on true and off is false.

sorry if my comment I was upset a little ... but ... if then else or and not I think is boolean basic math not only c code ... more English is not my language .... so use the code it seems to me better.

Anyhow ... now you are solved the question??

regards
giorgio

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BigJohnT
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9 years 8 months ago #87705 by BigJohnT

Replied by BigJohnT on topic toggle2nist description

An example here:
forum.linuxcnc.org/47-hal-examples/13201...-hold-resume-buttons

JT

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jensor
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9 years 8 months ago #87723 by jensor

Replied by jensor on topic toggle2nist description

I used: forum.linuxcnc.org/47-hal-examples/13201...-hold-resume-buttons

I found that after pausing, 1st depress of the run/step button, the unit finishes the line of Gcode it is on, pauses, depressing it again would advance 1 step, pressing it again would not step, but make is-on change state then the further presses did nothing. pressing resume/pause at this point does resume properly.

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andypugh
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9 years 8 months ago #87724 by andypugh

Replied by andypugh on topic toggle2nist description

I tried to put in tags for you, but they don't seem to work.

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bkt
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9 years 8 months ago #87753 by bkt

Replied by bkt on topic toggle2nist description

I found that after pausing, 1st depress of the run/step button, the unit finishes the line of Gcode it is on, pauses, depressing it again would advance 1 step, pressing it again would not step, but make is-on change state then the further presses did nothing. pressing resume/pause at this point does resume properly.

Ok is more clear for me .... because I have the same problem ... (very rarely but I have) ... so the next week I try to understand the problem better.

Reagrds
giorgio

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BigJohnT
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9 years 8 months ago #87779 by BigJohnT

Replied by BigJohnT on topic toggle2nist description

jensor wrote: I used: forum.linuxcnc.org/47-hal-examples/13201...-hold-resume-buttons

I found that after pausing, 1st depress of the run/step button, the unit finishes the line of Gcode it is on, pauses, depressing it again would advance 1 step, pressing it again would not step, but make is-on change state then the further presses did nothing. pressing resume/pause at this point does resume properly.

I'll have to take a look at it, the code was provided by someone else and I only use Run and Pause/Resume no single step.

Code:

# External Program Pause/Resume Button
net pause-resume-btn and2.3.in0 and2.4.in0 <= hm2_5i20.0.gpio.029.in_not
net pause-on toggle2nist.0.is-on and2.3.in1 <= halui.program.is-paused
net run-status and2.4.in1 <= halui.program.is-running
net pause-sig or2.5.in0 <= and2.3.out
net resume-sig or2.5.in1 <= and2.4.out
net toggle-ok toggle.0.in <= or2.5.out
net togglesig toggle2nist.0.in <= toggle.0.out
net toggleon halui.program.pause <= toggle2nist.0.on
net toggleoff halui.program.resume <= toggle2nist.0.off

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jensor
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9 years 8 months ago #87787 by jensor

Replied by jensor on topic toggle2nist description

The file you posted is identical to what I have and for Run/Pause works flawlessly. However the Run/Step function sometimes works perfectly, other times gets hokey and you have to hit the Run/Pause alternately with Run/Step to get it to step.

Jensor

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