Hi, in my project I need to run a stepper for a longer period uninterrupted and read data from a temperature sensor every second. What would be the best way to write the code so it can read the sensor without noticeably interrupting the stepper? Any thoughts on pseudo threads, interrupts or cooperat…

I believe I do, but just to cross-check. I imagine it to be a FIFO command buffer where stepper commands are queued and processed incrementally in the loop, while temperature commands are handled immediately. The stepper commands are processed until their steps reach zero, at which point they're rem…

Let’s say you need to move the stepper 500 steps CCW. We enable a non blocking stepper TIMER to run every 1ms. When this TIMER expires we move the stepper CCW 1 step and decrease a counter from 500 to 499 . . . When the counter reaches 0, we disable this TIMER. It takes the stepper 500ms to get …

Thank you very much, LarryD. Your explanation is clear and aligns with what I had in mind. However, I’m still a bit unclear about the use of a non-blocking timer. Why not just use the loop function itself as a timer? Are there any specific advantages to implementing a non-blocking timer instead? I a…

Non-blocking code is like a musical score. Every instrument is heard at the right time, rather than first hearing one instrument, then the next, and so on. [image]

Not sure what libraries you are using. *However, reading the DS18B20 must be made non blocking. Moving the stepper must be made non blocking. *Not doing so, makes sketches choppy and unresponsive. Do you know how to make a non blocking TIMER using the BWD technique ?

[image] daarie: a DS18B20 temperature probe There's this library for reducing the blockingness of reading a DS18B20: [image] Dallas Temperature libary non blocking question Sensors (FYI - I wrote the async extension to the dallas lib) The idea is simple, when you …

Define "longer period". At what step rate?

Reading in a DS18B20 sensor with the standard onewirelibrary takes around 750 milliseconds. The sensor in itself needs this time for measuring the temperature. The command to start the measuring needs less than a millisecond but the measuring needs the 750 milliseconds. No chance to run a stepperm…

[image] StefanL38: No chance to run a steppermotor in parallel without special tricks like a hardware-timer based interrupt. What prevent you to use a standard "blink without delay" code to do it without any need of hardware timer? [image] StefanL38: What this library is doing is: sendi…

The standard "blink without delay" code is best to get started to design the own OOP based timer function.

Write non-blocking code

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DaveX January 17, 2025, 10:18pm 13

There's this library for reducing the blockingness of reading a DS18B20:

And if you use a stepper library like MobaTools, you can plan non-blocking stepper movement.

The rest is being careful to not monopolize the processor so it is free to handle all the other bits that need handling.

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Write non-blocking code

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