Відео

Ok i got to say I'm really disappointed. Not with the defmt crate, that is great. And not with rust, that is a great language and i've enjoyed using it for native PC apps. I'm disappointed with embedded Rust. Let me set the stage. I've written embedded C code for the last 10 years as a full time job. I have a small personal project that handles several I2C busses with ADCs and DACs, a small display and a USB CDC driver. I originally wrote it in C a few months ago and it took me around 2000-3000 lines. Not a long app, but not a trivial one either, so i decided to try and rewrite it in Rust, as an exercise. It had a good bit of DMA and IRQs that needed quick handling, so i was quite curious how the rust crates handled that one. Now my problems: - The tooling barely works. I was trying to use my Segger Jlink for debugging, and not only did i have to use custom drivers, because probe-rs is utter crap, it still randomly disconnected half the time and you have to restart the session. At some point i'll assemble an original probe-rs probe and see if it works better with their hardware. I hope it does. I skimmed the schematics and it does look like a professional debugger, with level shifters and everything. I also love that its open source. - Crates.io is great, if the damn crates designers decide to use it! Embassy has older versions of the drivers there, the newest once are on GitHub, and all of the examples are for the newest versions!!!! so its just like using C libs, with google random git repositories, but this time the files end with .rs and not .c/.h. - No IDEs provided by chip manufacturers. Its like using STM32 with Eclipse back in 2015. You jumble together 1000 different addons, you configure all of them manually and hope the versions you downloaded are compatible with each other. And of course they are not, and of course the config files online are outdated since, the versions changed, and you have to go digging around for hours in order to get basic functionality to work properly. Somehow f**ing Microchip with their bloated, slow and huge IDE have a better dev experience. - And not the big two - size and speed. I implemented only a the ADC handling from the original app in Rust and nothing else! Yet the binary was almost the same size as my full C app. The C app that had multiple fonts for the display stored in flash was comparable in size with the rust app, that had some I2C DMA code and some printing. - And the speed ... dont even get me started on the speed. The delays between the DMA I2C transfers is orders of magnitude slower in the rust app! I measured it with a logic analyser. I know its not a problem of the language. If i had to guess its a problem with Embassy, but given how wide spread it appears to be, i'm basing my assumption in it. With all that being said, the state of embedded Rust is a lot better compared to 4 years ago when i first had a play with it. I'll give embedded Rust a try every now and then to see how its progressed. I really hope i can switch to it soon, because i'm not a fan of C's memory unsafety. And yes, i'm fairly new to rust and this may all be skill issues. Still i feel like i'm fighting the tooling all of the damn time.

Thank you for a such helpfull embedded rust world intro! Also, it would be interesting to compare such a simple example with the blinking led between rust and C. I'm a bit confused about the pros and cons of low-level programming using rust in such baremetal cases, since to deal with it we need to go into unsafe mode anyway.

Excellent. I'll be rewatching this to understand how Embassy works "under the hood".

I've been programming for decades, but I'm quite new to Rust. Having watched about half of your videos so far, I really like how you don't just jump right to the end-state offloading all the inner workings to a library. Instead, you start from first principals and work-up a basic implementation that clearly demonstrates the concept before showing the library short-cut. This kind of teaching really helps developers grow from committers to _contributors_! ☺ Look forward to seeing more!

+1

Amazing video! Fantastic quality.

Im curious, is async aproach good for lets say real time audio. For guitar amps or pedals.. When you have audio thread that is highest priority, and must not be blocked ever. Is classical RTOS aproach better than?

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I have never subscribed this quickly before. Well done. :)

Have you ever had any issues where messages are randomly not shown? Thanks so much for this video!

Thanks!

Thanks!

I watched the whole video. PLEASE consider doing a complete tutorial for Rust. I like the way you explain things.

All I can say is KEEP DOING WHAT YOU ARE DOING! I am starting out with Rust with the intent that I am also going to use it in embedded systems. You are top drawer and I am going to keep coming back for more!

I would love to see some STM32H based projects. My favorite board now is the Arduino Giga R1 (STM32H747XI) with the Giga Display board. This is for my Robot Smart Home Controller.

i think you have done a great video on the topic! thank you so much!

Pieces of this video went right over my head due to inexperience, but this talk [ua-cam.com/video/H7NtzyP9q8E/v-deo.htmlsi=eeVPFC9iHGsHWivR] by the Embassy creator helped clear things a lot more.

I aprreciate the work put into this video. But when I tried following it myself I found the explanations to be too advanced to the point where I couldn't make sense of anything and I got really discoureaged by the experience.

You made me sit down and think how concurrent tasks are usually implemented using state machines, thanks for this amazing work!

I see that you convert a Result type to an Option type in several lines of code using the the .ok function but not using the resulting value. Why convert the Result into an Option without using the value?

What crate is being used at 0:11 for interfacing with the ublox module? I just noticed it in passing. I have found a the ublox-cellular-rs crate, but was wondering if there was another I missed.

This is gold, thank you

fantastic teacher.

Realy looking forward to the next one. Your channel will blow up, trust me. Can I invest somehow? 😅

My favorite part about Rust .. rewritting something you just wrote lol

Great Job, good starting point. I'll change to Rust.

This video is life! Love it top to bottom. This is why I love engineering and love my fellow engineers. I literally laughed out loud several times. #subscribed

I've been using Rust in quite a few embedded systems, bit fan here :)

Fascinating video

Very clear. Nice. I especially appreciated the tail joke.

Very good. I'd love to see something similar at an even lower level - i.e. getting something running with no code dependencies and then building up slowly until it becomes obvious what the dependencies are (at least roughly) doing.

I like that your RTT buffer is 8 times the total SRAM on one of my favourite microcontrollers. :)

Yeap, subscribed! Amazing video

This feels a lot like Windows ETW. Nice.

Please continue making videos. You are clearly an expert and have consistently high quality.

Content ok.... All the goofiness and over the top drama? not so much really.

Oh, I think I have a nice usecase for this Having a tiny MCU in a device and bigger wi-fi enabled mcu as an addon will allow me to keep firmware tiny and have formatting happen on big MCU if it's connected

Thank you for your videos!😊

Amazingly presented, love the editing and storytelling and the pace

Can't wait for that future video now!

These videos are great! After coming from Arduino serial printing, using defmt for the first time straight up blew my mind. I am also at the point now where I would benefit greatly from being able to transmit my defmt logs wirelessly, and have also wondered about the versioning issue. Looking forward to your next video!

Would love to see a non debug probe setup for this. Great video as always!

Isn't this basically like protocol buffers

Good video

What about the tracing crate, is it used in embedded?

I've read the thumbnail as "Deform your legs". Insert "instructions unclear" meme

Nicely explained, can't wait for the follow up video about this topic!

Now I finally understand what defmt does differently, thank you

This is really fantastic! Thank you! I loved zero2prod. You’ve accomplished the same thing here for embedded Rust. I was an embedded C++ dev for four years. Now, for the first time in ages, I’ve got the itch to play with a microcontroller - this time in Rust 😛

Wow, love that defmt after what I've seen here😆