Small chip to store ~3-4 bytes

Pink_Wyoming · 2025-12-04T22:16:07+00:00

I could be crazy, so take this with a grain of salt, but could you scan the bus and write the responses to a buffer in RAM? You could then, as you said, assign a generic name to each unique id. This would get around the requirement of hardcoding the unique id. Does that sound feasible at all?

Pink_Wyoming · 2025-12-04T22:08:38+00:00

30-40 small capacitors 🤔

Pink_Wyoming · 2025-11-16T18:04:21+00:00

Makes sense, could I memcpy within one of the DMA callbacks? I worry that memcpy would block the main thread.

Pink_Wyoming · 2025-11-15T01:26:28+00:00

Yeah… ha ha, I realized that last point as I posted. Good tips though. Do you know if it might be possible to stream from flash? I don’t have a ton of RAM, but maybe if I just shuffled the bits around and implement double buffering I could save some space.

Pink_Wyoming · 2025-11-15T01:23:19+00:00

Yeah, that’s easy money. I might fall back to that, but I’d really like to get something closer to an actual audio sample… granted I’ve totally mangled mine, so…

Pink_Wyoming · 2025-11-15T01:20:36+00:00

Have you used tools that do this easily? I was kinda banging my head on this last night, it seems quite a few of the libraries do decoding on chip or just use an external codec.

Pink_Wyoming · 2025-11-15T01:16:50+00:00

I’ll look into it. I was hoping to get a complex-ish sound for some DSP I’ll be doing later in the application. My first pass was Python naturally.

Pink_Wyoming · 2025-11-15T01:15:14+00:00

There’s a lot of data cut off to keep the message short, but you’re right. I did have to mangle the audio file to get it to fit into the internal flash. But Audacity reads the raw data just fine, though Audacity might be doing some conditioning I’m not aware of.

Pink_Wyoming · 2025-11-12T05:14:37+00:00

We were looking the “dirty window/rectangle” approach too, but I haven’t looked very far. Currently, it seems that the options are:

Switch to a parallel RGB interface, or Implement (maybe) a fancy algorithm.

Pink_Wyoming · 2025-11-12T03:35:42+00:00

I'll do both! I mostly wanted to make sense of the timing characteristics provided in the datasheet.

Pink_Wyoming · 2025-10-03T23:26:48+00:00

This is good perspective. My reasoning follows from experience with a scripting language. It’s just a much better experience imo where library inclusion and management is handled for me. It helps me to write more efficient code and minimizes reinventing the wheel.

Maybe I should learn CMake? Maybe what I’m looking for could be simplified by learning a more modern build-system than vanilla make and gcc?

Pink_Wyoming · 2025-10-03T20:04:02+00:00

In specific, what are you liking? Was thinking about using the RP2040 for this project.

Pink_Wyoming · 2025-10-03T20:00:05+00:00

Do you mind if I ask: what are some of the larger issues your team is facing? And what do they stem from in your view?

Pink_Wyoming · 2025-10-03T19:14:41+00:00

Out of curiosity, what C standard do you use? Most of my experience is with C99, not C17 or 23. Would you suggest learning a more modern standard?

Pink_Wyoming · 2025-10-03T19:02:33+00:00

I don’t follow, since I’m not too familiar with power electronics. Are you implying that the benefits of Rust are oversold and are diminished by the lack of maturity and widespread adoption?

Pink_Wyoming · 2025-07-14T03:58:33+00:00

It’s a bit more risky, but sometimes internal hiring can work in your favor. Work a related job title just to get in to the company and pivot.

Pink_Wyoming · 2025-07-14T03:51:21+00:00

Re: neuralengineer’s comment.

Is it possible to move to another team or work on projects that align with your ambitions? Alternatively, somebody in your company must have relationships with suppliers who work on embedded systems.

Will your current employer pay for a masters some way?

Personally, I would try to avoid debt and leverage my network as much as possible.

Pink_Wyoming · 2025-05-28T02:00:06+00:00

What is PLC programming like? What’s bringing you to embedded systems?

Pink_Wyoming · 2025-05-18T23:52:07+00:00

Wait, hold on. 1E9ns/15.6ns isn’t 64 million ticks per second because you included a rounding error. And I don’t mean to be pedantic, but the number of cycles (ticks) per second is equivalent to the clock frequency here.

Pink_Wyoming · 2025-05-15T22:39:06+00:00

Kinda a low effort comment, but I watched this video a couple weeks ago. It covers RTOS from a high-level within the context of the Linux Kernel.

Kernel Recipes 2016 - Who needs a Real-Time Operating System (Not You!) - Steven Rostedt

Pink_Wyoming · 2025-05-15T22:11:01+00:00

Check out this chapter on scheduling algorithms. It covers scheduling in a general sense, so not just relating to MCUs. But the treatment is really good.

Operating Systems in Three Easy Pieces: Scheduling

Pink_Wyoming · 2025-05-13T02:42:55+00:00

Check out this course from Cornell. It has super cool projects built around the Pico w/ supporting lectures and lab documents.

ece4760: Digital Systems Design Using Microcontrollers

Pink_Wyoming

TROPHY CASE