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General
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General LinuxCNC Questions
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how to get the motion cmd?
how to get the motion cmd?
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02 Aug 2018 15:26 #115409
by myz
Hello everyone, I have a question, I want to know how to implement the functions in the picture in linuxcnc. I want to get the motion command and pass it to ethercat via shm. But I don't know how to achieve it. Who can tell me?
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02 Aug 2018 15:56 #115411
by myz
Thank you for your answer.python_module,i know that.but I want to know if I can use c?
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02 Aug 2018 18:35 #115427
by bevins
Yes you can. C "cover functions" can be written to give C applications access to NML.The NIST site has code examples.
I don't know if Linuxcnc site goes into detail, but head over to nist.gov site to get started.
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03 Aug 2018 12:30 #115504
by andypugh
I am not sure that I fully understand the question, but if "SHM" in this diagram means "shared memory" then the shared-memory layer in LinuxCNC is HAL, and most drivers are HAL modules (written in C)
The LinuxCNC implementation of EtherCAT already exists as a HAL module, so I don't think you need to re-invent anything.
The EtherCAT implementation os not distributed as part of LinuxCNC, partly because of licensing issues with Beckhoff.
Details of the EtherCAT driver here:
forum.linuxcnc.org/24-hal-components/223...-driver?limitstart=0
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General
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General LinuxCNC Questions
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how to get the motion cmd?
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