15.04.2023 –, HS i1
Sprache: English
One of my more pointless projects is to blink a configurable set of
programmable patterns on a number of LEDs. This might sound like "hey,
you are reinventing the wheel". I admit I do - I am a notorious
reinventer, and it is fun.
Lets reinvent LED blinking in a live-hacking session, and look into a
number of topics as we go:
- Python is a programming language that most of you know. It is simple
and expressive, thus fun. - Python's
asynciois a parallel programming technique, similar to
multithreading in its usage, but fundamentally different in every
other respect. At its core, it maps multiple parallel control flows
onto one single-threaded event loop. Given that timers are events,
this gives us the possiblity to run multiple LED blinking programs
in one single thread - saving all the context switching and
scheduling overhead that multithreaded programs usually
exhibit. Blinking with less glitches caused by context switch hiccups! - Ah, blinking patterns. Know what Python decorators are? Closures?
We'll twist our brains and create a@programdecorator,
implemented as a double-closure, and use that to write a number of
amazingly simple blinking programs. Almost like functional
programming. - Last not least,
libgpiod. The way to go for GPIO on Linux.
- Born in Graz, and bound to die in Graz
- Been around as an employee in and around Graz for many years
- Self employed as trainer and consultant for even more years
- https://www.faschingbauer.me