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diyelectromusic 1d ago

So, cheap PLDs from China... what kinds of mischief is likely?

I need some ATF16V8B in DIP format, but what might I end up with and would it be worth a punt?

I know how with general logic, they might be the wrong types, etc, but I don't know much about PLDs.

For my messing around, I'm not bothered by pulled devices even if re-tinned and re-etched, providing they are still likely to be usable...

diyelectromusic 1d ago

RetroSteveUK 1d ago

Can you believe View-Masters have been going since the 1930s!? Join me for a look back at their history, right through our childhoods and on to present day, in my latest RetroSpectives video all about the 3D View-Master range.

Video Link:
https://youtu.be/rJbbod_BHkA

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diyelectromusic 2d ago

Continuing might slight mini-moan about the RP2040/RP2350 PIO... this code is really making me squirm...

static inline pio_sm_config pwm_program_get_default_config(uint offset) {
pio_sm_config c = pio_get_default_sm_config();
sm_config_set_wrap(&c, offset + pwm_wrap_target, offset + pwm_wrap);
return c;
}

This is automatically produced by the assembler.

Notice that the "get" function has an interesting side effect of setting some pretty crucial parameters on the fly...

diyelectromusic 2d ago

Have Aliexpress unpacking videos always been a thing and I just didn't notice?

Or have lots more people suddenly started doing them...?

diyelectromusic 3d ago

Gene Boggs 3d ago

New technical article published on how to make a drum machine app in #Perl: https://www.perl.com/article/making-an-asynchronous-clocking-drum-machine-in-perl/ - Woo!

Thanks @oalders :D

Making an Asynchronous Clocking Drum Machine App in Perl

Let's Make a Drum Machine App!

Perl.com

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diyelectromusic 4d ago

Well I've added some notes to my existing blog post about some of the patterns that I've seen so far.

There are two new sections "Some PIO API Principles" and "PIO API Organisation" mostly as a reminder to myself (as usual)

https://emalliab.wordpress.com/2026/04/06/pio-on-the-raspberry-pi-pico-part-2/

diyelectromusic 4d ago

Is anyone aware of any article that provides a summary view of the Raspberry Pi Pico rp2040/rp2350 PIO APIs?

There are lots of getting started and tutorials and so on; and the datasheet and hardware API reference lists them all.

But, for example, I've not found anything that states there are sm_config_ , pio_sm_set_ , and the pio_encode_ groups. Or that there are _set_, _in_, _out_, _sidestep_ variants.

I've got it, but before I blog it, I'd like to know if I've just missed it somehow.

diyelectromusic Apr 10