LinuxCNC at RPI4 with using IO Pins only ?

PCW
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28 Mar 2021 19:07 - 28 Mar 2021 19:07 #203927 by PCW

Replied by PCW on topic LinuxCNC at RPI4 with using IO Pins only ?

Yes, if its a slow serial setup thing then a separate comp makes sense.
If you can setup chip parameters via SPI (like some chips I am familiar with),
hal parameters should be fine as they are not transmitted so take near 0 CPU
if not changed (and allow real time adjustments if needed)

Last edit: 28 Mar 2021 19:07 by PCW.

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andypugh
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28 Mar 2021 23:47 #203965 by andypugh

Replied by andypugh on topic LinuxCNC at RPI4 with using IO Pins only ?

Are you saying that some Trinamic chips can take position commands over SPI and effectively generate steps internally?

The datasheet that I just glanced at didn't seem to be saying that, for the one that I looked at.

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PCW
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29 Mar 2021 01:11 #203968 by PCW

Replied by PCW on topic LinuxCNC at RPI4 with using IO Pins only ?

Yes, the TMC5160 can do this and probably others
Also the ST Micro PowerStep01

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rufino
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17 Jan 2024 01:25 #290919 by rufino

Replied by rufino on topic LinuxCNC at RPI4 with using IO Pins only ?

Is it possible to provide a tutorial for configuring the Raspberry Pi using GPIO with LinuxCNC?

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rodw
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17 Jan 2024 09:41 #290933 by rodw

Replied by rodw on topic LinuxCNC at RPI4 with using IO Pins only ?

rufino wrote:
Is it possible to provide a tutorial for configuring the Raspberry Pi using GPIO with LinuxCNC?

Try linuxcnc.org/docs/stable/html/drivers/hal_gpio.html

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