Raspberry Pi Forums

Heater

One of the differences is that newspapers just published general adverts. They didn't track what you did and tailor the ads to your alleged interests. I'm getting fed up with adverts on facebork for a local gravel company. No idea why I get those. You like gravel don't you? I thought everyone liked...

Heater

I'm not surprised you can do such waveform generation in Python. Despite being the slowest and most unpredictable language since BASIC it can do such things and perform well when using libraries, which are written in C/C++. The problem comes when you need to do more than one of those things at the s...

Heater

I see websites that complain about ad blocking software,... Yeah, what is that about? In the old days we bough newspapers and magazines. You know real printed material printed on paper. Those newspapers and magazines were full of advertising. I guess the papers and magazines survived off adverting ...

Heater

Ah, you are using Python for bit-banging.

You are doomed.

Possibly the slowest most jittery language system to try and so such real-time thing with.

You might have some luck if you can separate your serial port handling things into their own threads.

I would not even try.

Heater

You are doomed. Linux, as used on the Pi is not a real-time operating system. Your simple bit-banging code is subject to the whims of the kernel scheduler. You can stop Linux from interrupting proceedings by using "isolcpus" on the kernel boot command, google it, to stop Linux scheduling processes o...

Heater

But the Kingdom most people ignore is the the one that fungi and yeasts belong to, and here is where it gets interesting. I once meant a girl who would not eat mushrooms. Thinking this was weird I had to ask. Apparently it was because fungi were more likely to be sentient beings than her normal veg...

Heater

Perhaps it is because of those "stringent regulations" that so few die? Quite. What we need then are similar statistics from the good old days of tube TV's and radios with live chassis, even home made ones with 500v DC tube supplies, and DIY electrical installation everywhere. It's just that I don'...

Heater

Interesting. Only about 300 people are killed by electricity in the USA each year. As far as I can make out most of those are in the work place or involve high voltage overhead lines. https://www.electrocuted.com/safety/statistics/ Meanwhile about 160,000 die as a result of all manner of other accid...

Heater

I think I'm going to throw up.

Have people no respect for animals?

Heater

If that were a requirement for every idea then it would be 10 years out of date by the time it was ready. Let's think about that... In the middle of your latest flight of fancy you have a big blue box labeled "FPGA + AVR JTAG Interface BIOS + Multiplexer Mailbox/RAM I/O Memory Map Kernel Drivers." ...

Heater

ptamike wrote: ↑
Fri Jun 19, 2020 10:18 pm
It's a simple as that!

Which was already described a few posts and a few years back here.

Except that none of the Windowing systems I have on any computer have what you describe.

Heater

All the Pi I use have WiFi now a days. None of them have screens, keyboards or mice attached. Often they are very far away from me. Typically they connect to my normal WiFi router. The one I use to access the internet. Then I can talk to the Pi from a PC or laptop using SSH. Windows users typically ...

Heater

Well, if the case is "no use" for what you want to use your Pi system for then why not chuck it in the bin and be happy

Alternatively, surely it is not so hard to bypass whatever crappy circuit is handling the power in that case and power the Pi directly.

Heater

B.Goode wrote: ↑
Fri Jun 19, 2020 1:41 pm
Maybe the pin is changing state more rapidly than your 'scope can keep track of?

Unlikely. He is programming in Python. I suspect there never was a scope made that was so slow it could not keep up with bit-banging in Python.

Heater

Normally the operating system will make use of all available cores on your machine. Scheduling processes and threads here and there as it sees fit for optimum performance of the whole system. If you really need to restrict the OS to only scheduling tasks on one core or two or whatever then you can u...

Heater

drgeoff wrote: ↑
Thu Jun 18, 2020 3:30 pm
Or he decided to try it again to identify which of the 3 types I posted and it really was the third one.

I thought that was the 3 types "we" posted.

Oh dear, what have we done?

Perhaps we should include a hazard warning and disclaimer in our sigs?

Heater

This looks like a Transputer system based on Pi SoCs. No it does not. The Transputer was a conceptually elegant design with well specified communication channels between nodes and a coherent programming language, Occam, to use it with. This is a 3D model of a circuit board and some plastic toy part...

Heater

The original Pi Model A has been described by Dr. Upton as his "one failure" and that because it sold "only" 100K. What? That is ludicrous. Did Eben really say that? Looking back 100K units might not seem much today. But I recall Eben saying years ago that they only expected to ever sell a few thou...

Heater

dividuum wrote: ↑
Thu Jun 18, 2020 2:47 pm
...so not installation is required. All dependencies can be install with apt.

That is a contradiction in terms.

Heater

There are ways to ensure your software works. If you know the secret please do tell. All the world want's to know how. I'm pretty confident in saying it would take you a month of Sundays to get the development environment you describe working on Mac, Win 10 and/or Linux. You are right. Currently we...

Heater

LTolledo wrote: ↑
Thu Jun 18, 2020 11:03 am
my bet is on #3

Why?

Seems really unlikely with modern consumer monitors and such. Was never a common issue with such thing even decades ago. Unless our OP has been hacking on something we don't know about yet.

Heater

So I want to build my own car chassis for custom wheels etc. Where can I get this done? What an odd question. All my life if I wanted something like that done I did it myself. Unless it was a design for a production run. I'm old school. Get some bits of wood and/or hard board. Invest in some hand t...

Heater

We still don't know what "shock" is meant here. Could be that cockles and mussels getting thrown across the room kind of shock. Could be that kind hint of "electric vibration" one can often feel when gently rubbing a finger over a non-grounded chassis. Like my Microsoft Surface Pro. Could be the lit...

Heater

drgeoff wrote: ↑
Wed Jun 17, 2020 4:44 pm

Heater wrote: ↑
Wed Jun 17, 2020 3:46 pm
.... all your mussels ........
And all your cockles too!

Dammit.

Seafood and electricity do not mix. As Molly Malone found out:

"Cockles and mussels alive, alive oh!"

Heater

In short Win10 IoT is obsolete and unsupported since two years ago or so. It does not work on modern Pi.

Better to just use the Raspberry Pi OS and be sure your creations will work well into the future, even as new model Pi are created.

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