Request: Custom 7C80 bitfile - Replace StepGens 0, 1, 2 with PWMGens (TB7, TB8,

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05 Mar 2026 17:37 #343906 by Tony123
Hi LinuxCNC community,I am running a Mesa 7C80 via SPI on a Raspberry Pi 5. Because my main axes and spindle are handled over EtherCAT, I am not using the standard StepGens.I need to drive three linear coil motors that require a standard 5V hardware PWM signal. Could I please request a custom bitfile that replaces the first three StepGens with PWM Generators?Specific Routing Request:
  • TB7 (Normally StepGen 0): Replace with a PWMGen.
  • TB8 (Normally StepGen 1): Replace with a PWMGen.
  • TB9 (Normally StepGen 2): Replace with a PWMGen.
Ideally, I would like the primary pin on each of those terminal blocks to act as the PWM output, and the secondary pin to remain available as a standard GPIO so I can use it for the Direction signal.Thank you in advance for your time and all the support you give this community!

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05 Mar 2026 22:24 #343927 by PCW
So you want the DIR pin to be GPIO rather than PWM direction?

( The PWM direction pin is controlled by the sign of the PWM value )

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