Printer Model: Voron 2.4
MCU / Printerboard: BTT skr 1.4
Host / SBC BananPi
Hello,
is there a way to write arbitrary I2C (or UART) commands via a Macro?
something like READ_I2C_REGISTER_UINT32 A= R= or something like that?
I couldn’t find anything like that.
This actually surprises me, as you would have the option to greatly expand “custom” things for whatever kind of thing one might implement.
Short answer: No
Most probably you didn’t develop some complex Macros, if you would - then immediately you would understand that it’s awful idea to use them for this kind of stuff, most obvious issue is Rendering/Execution of them.
If you want to introduce some low-level stuff you should develop new separate module (Extras) which is using Python for execution.
Well, I coded a complete toolchanger with picking up and dropping individual toolheadsl, so I’d say medium complex…
But thanks for your answer, I understand the problems 
There is no generic capability to send messages to an i2c or spi device from a macro in the mainline Klipper. If anyone is curious though, I did implement a development branch with this flexibility - GitHub - KevinOConnor/klipper-dev at work-sensordebug-20231213
-Kevin
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