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grblHAL / iMXRT1062

grblHAL driver for NXP iMXRT1062 (Teensy 4.x)
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BLTouch Servo Probe #59

Closed arda-min closed 1 year ago

arda-min commented 1 year ago

Is it possible to use a BLTouch probe with grblHAL on teensy41? I have a small sketch using the arduino Servo library which works, when using the library from inside a plugin, the probe doesnt work.

This seems to be a similar attempt but directly controlling the servo: https://github.com/grblHAL/core/issues/280 Trying to apply the changes to this repo, noticed for teensy "RC Servo/ESC for spindle" isnt supported. What would it take to add support for servos?

terjeio commented 1 year ago

Wait a bit for the servo plugin (and lowlevel support for this driver) to become available.

Trying to apply the changes to this repo, noticed for teensy "RC Servo/ESC for spindle" isnt supported.

This option, when available, cannot be used for a BLTouch probe.

arda-min commented 1 year ago

Thank you, I was thinking Servo Spindle support would provide some of the low level functionality necessary for analogue outputs. Any idea why the Arduino servo library would not work when used from within GRBLHal? What would it take to add the low level support to this driver? Something I could try to adapt?

terjeio commented 1 year ago

Any idea why the Arduino servo library would not work when used from within GRBLHal?

Not really, but my guess is that you do not have code in place to initialize it. Or that grblHAL already uses the timer you want to use for the servo.

What would it take to add the low level support to this driver?

Some new code in the driver ioports.c.

Something I could try to adapt?

Yes, but wait until the ioports API has been extended. Or you may write your own servo plugin that is board specific and handles everything locally.

arda-min commented 1 year ago

Must have been the timers, got it working with hardware pwm, thanks you so much!

terjeio commented 1 year ago

FYI I now have added driver support for PWM output via M67/M68 and @wakass has a plugin in the pipeline that adds M280 support (from Marlin specs) on top of that.