2026-04-23 10:27:10 <veltas      > Look, more durian stuff: https://www.theguardian.com/world/ng-interactive/2026/apr/23/jakarta-profile-worlds-largest-city
2026-04-23 10:27:17 <veltas      > Can't escape it now
2026-04-23 10:27:27 <veltas      > I guess it's Asia time
2026-04-23 10:36:53 <tpbsd       > not that far from here
2026-04-23 10:37:54 <tpbsd       > Im working on GIT export and import from Fossil atm, so I can make content in Fossil and have it updated online to my GIT repo
2026-04-23 10:41:07 <veltas      > I think Ukraine is closer to me than Jakarta to you, but I suppose you're used to longer distances of reference than me
2026-04-23 10:49:47 <tpbsd       > yeah, I think nothing of a 200km trip up the road
2026-04-23 10:50:04 <tpbsd       > or a 5 day 5000 km trip
2026-04-23 11:07:12 <veltas      > That sounds fun right now, can't really do long trips at the moment with very young kids
2026-04-23 11:07:39 <veltas      > In the UK I'd have to circumnavigate the island to get a 5 day trip
2026-04-23 11:09:17 <tpbsd       > heh, that sounds odd to me
2026-04-23 11:09:38 <tpbsd       > 5000 km is just across Australia
2026-04-23 11:09:52 <tpbsd       > but dont do it in summer, it could kill you
2026-04-23 13:30:09 <veltas      > Also trains, I swear there's a spike in train crashes: https://www.theguardian.com/world/2026/apr/23/train-collision-denmark-near-copenhagen
2026-04-23 14:46:32 <tpbsd       > KipIngram, it's impossible to get perfect square waves out of a micro with any code unless you use a timer, due to the GPIO set up times for 1 and 0 output
2026-04-23 15:39:07 <KipIngram   > I'm using "perfect" in a qualified way there.  You're right, but there are larger imperfections you can get from not having the whole software stack arranged right.  I think most of these "consumer" systems just really aren't targeted at "best reasonable real-time" performance.  In this case I think they're targeted at being as easy as possible for a mostly untrained person to work with.
2026-04-23 15:48:25 <cleobuli_   > https://www.youtube.com/watch?v=JDtjMAJU5gY
2026-04-23 15:58:43 <tpbsd       > KipIngram, of course the 50/50 error for the square wave gets better the slower it is, and vice versa as the difference is small, maybe 4-5 nS
2026-04-23 15:59:07 <tpbsd       > at max speed, it's terrible
2026-04-23 16:00:15 <tpbsd       > but thats why all the decent mcu's have timer/counters which can operate at 5MHz with perfect 50/50 waveforms etc
2026-04-23 16:03:10 <tpbsd       > KipIngram, and of course it's evident in software delays regarding gpio pulses, the smaller pulse, the greater the error
2026-04-23 16:24:48 <tpbsd       > amazing from 2019-04-30 to 2026-04-23 I've had 7000 downloads of my bluepill diags and I still get about 5 every day! the old Bluepill clones are still an issue
2026-04-23 16:25:14 <tpbsd       > and it's just a Mecrisp-Stellaris image with a menu !
2026-04-23 16:43:57 <tpbsd       > Forth is dead   https://www.youtube.com/watch?v=LolfSV2P_q0
2026-04-23 16:44:54 <tpbsd       > the beez! on local variables
2026-04-23 17:19:28 <veltas      > What's his conclusion?
2026-04-23 18:15:57 <KipIngram   > Maybe I misinterpreted your earlier description of it - I thought we were talking about even relatively low-frequency square waves looking good over many cycles and then suddenly injecting a noticeable jitter.  I wasn't really referring to the ultimately ineviitable imperfectsions down at the nanosecond level.
2026-04-23 18:16:56 <KipIngram   > I was thinking in terms of a programmed loop getting more or  less interrupts during some given  half cycle, etc.
2026-04-23 18:17:20 <KipIngram   > You know, things you can combat if you actually have control over interrupt priorities and so on.