this post was submitted on 25 Jun 2024
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A good engineer prepares for every use case. (lemmy.world)
submitted 4 months ago by [email protected] to c/[email protected]
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[–] [email protected] 15 points 4 months ago (1 children)

All my homies love diagnosing problems by decoding LEDs blinking in code.

[–] [email protected] 7 points 4 months ago (1 children)

I write code for embedded systems that have hard real-time deadlines. Flashing an LED is an inexpensive number of operations compared to most other diagnostic techniques. I can connect an oscilloscope to them to get meaningful accurate time measurements. I am not blinking out Morse code status messages (although I have considered it for some particularly squirrelly problems).

[–] [email protected] 5 points 4 months ago (1 children)

Take to another level by attaching a speaker to a PWM peripheral, now you can debug by ear, whilst driving your colleagues barmy with the beeps. The only tricky bit is working out if it was three beeps and a boop, or two beeps then a beep-boop.

[–] [email protected] 2 points 4 months ago

More fun to vary the pitch and length of the beep rather than the number of beeps.