this post was submitted on 13 Mar 2024
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flashlight

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Portable illumination

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submitted 8 months ago* (last edited 7 months ago) by solrize to c/flashlight
 

And, any idea how to use them? 3 pins is perplexing.

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[–] [email protected] 3 points 8 months ago (1 children)

Aren't most microcontrollers programmed over UART? AVR has their own one wire programming interface, but neither use clock signals.

[–] j4k3 1 points 8 months ago (1 children)

One wire is more for just a few sensors. I think the STmicro stuff has a 1 wire option. At least one of my programmers has a label for it, but with all my hobby stuff, I've never used 1 wire for programming. I have only used it for a temperature sensor as far as I can recall. Everything is either JTAG or UART in my limited experience.

[–] [email protected] 4 points 8 months ago

So there's the OneWire protocol that's for sensors, different microcontrollers will implement a programming protocol using a single wire, which is what I meant.

Jtag has a clock signal, but is generally 5 lines.

My point being that looking for similar trace lengths because one is a clock signal isn't sound advice. All the common protocols either don't use a clock signal, or are more than two lines.