M68 alternative

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01 Apr 2019 14:37 #130098 by sdf
M68 alternative was created by sdf
Is there a way to send a value from a gcode to pyvcp?
I know about M68 but it is limited to only 4 variables, is there any alternative?

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01 Apr 2019 15:06 - 01 Apr 2019 15:07 #130102 by PCW
Replied by PCW on topic M68 alternative
M68 can use up to 64 variables by setting the "num_aio" parameter when motion is loaded.

( man motion )
Last edit: 01 Apr 2019 15:07 by PCW.
The following user(s) said Thank You: sdf

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01 Apr 2019 15:47 #130107 by Todd Zuercher
Replied by Todd Zuercher on topic M68 alternative
Another option is to directly "setp" the value of hal pins (or signals with "sets") with custom M-codes.

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02 Apr 2019 04:54 #130132 by sdf
Replied by sdf on topic M68 alternative

PCW wrote: M68 can use up to 64 variables by setting the "num_aio" parameter when motion is loaded.

( man motion )


Yeah , this is solved the problem.
loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS

loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS num_aio=64

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02 Apr 2019 04:55 #130134 by sdf
Replied by sdf on topic M68 alternative

Todd Zuercher wrote: Another option is to directly "setp" the value of hal pins (or signals with "sets") with custom M-codes.


not sure what do you mean, can you give an example how it is done?

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02 Apr 2019 12:54 #130154 by Todd Zuercher
Replied by Todd Zuercher on topic M68 alternative
Look at the M100 example here in the documentation.
linuxcnc.org/docs/html/gcode/m-code.html#mcode:m100-m199

That example uses M100PnQnn to set the value of two hal pins equal to n and nn.

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