Can Real Time Components read shared memory?
06 Jun 2020 12:13 - 06 Jun 2020 12:13 #170355
by rodw
Can Real Time Components read shared memory? was created by rodw
Hi I was hoping I could access the state tags structure from a component written in C
But this is not valid
It compiles OK but I get this error at run time
Is there a way to achieve this? Or is it off limits?
But this is not valid
#include <motion.h>
extern struct emcmot_status_t *emcmotStatus;It compiles OK but I get this error at run time
tags: dlopen: /home/rod/linuxcnc-dev/rtlib/tags.so: undefined symbol: emcmotStatusIs there a way to achieve this? Or is it off limits?
Last edit: 06 Jun 2020 12:13 by rodw.
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06 Jun 2020 12:16 #170356
by tommylight
Replied by tommylight on topic Can Real Time Components read shared memory?
Notice the upper and lower case letters, might be just that.
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06 Jun 2020 13:22 #170364
by rodw
Replied by rodw on topic Can Real Time Components read shared memory?
nah more than that, I cut and pasted from the source code
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06 Jun 2020 14:34 #170368
by rodw
Replied by rodw on topic Can Real Time Components read shared memory?
I tried adding a pin in motion.c and I got an error that indicates that data is not in shared memory so back to the drawing board. Too late now!
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07 Jun 2020 02:17 #170434
by rodw
Replied by rodw on topic Can Real Time Components read shared memory?
I had better luck today (After about 3 hours studying the code). At least I can retrieve some State Tags fields into motion.
forum.linuxcnc.org/24-hal-components/392...the-current-feedrate
Next step is to try and publish them as pins in motion.
forum.linuxcnc.org/24-hal-components/392...the-current-feedrate
Next step is to try and publish them as pins in motion.
The following user(s) said Thank You: tommylight, Aciera
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