YES! I am SOO happy to see this! Your STM32 series was a fantastic introduction to that micro controller family. If this series is even half as good as that then I am super excited!
I was just about to skip on the best Linux resource on the internet, thank god I clicked on this video. Please Please make a comprehensive series on the three (especially Yocto). Thanks alot guyz!
I've been working with Yocto on and off for a couple of years. It is extremely powerful. Just finished a custom build for a client using i.MX6 ULL chip. Never would have been able to do it without yocto. Looking forward to the series. I still have a lot to learn, I think my work flow needs improving. I've notice over the last three years the need for developers to be using Linux to sky rocket. I'm coming into contact with companies where only the admin staff are on Windows. Management on Mac. Everyone else on Linux.
buildroot is WAY easier than yocto. To date I have not seen anything that you could do with yocto that you cannot do in buildroot....easier. Yocto can take years to properly understand, buildroot....basically an afternoon. It is simpler but not hard to customize.
The introduction is great. I have worked with buildroot on and off for years. You can split the build into components, boot loaders, kernel, device-tree, root filesystem. This makes updating the kernel easy as long as you can just update each part on your SD card. You can make these components from the buildroot build command line. The best way to figure this out is 'make help' in the buildroot directory, there is a lot of information there. Hope I have not just taken the subject of an up and coming episode of this series. Keep up the good work I will be able to point co-works at this series instead of writing lots of documentation.
Nice timing, I'm playing with a AllWinner D1 64 bit RISC-V board, for fun I want to do exactly this. It's on my ever growing stack of ToDo's... Thanks as ever for all your work, it's excellent!
Excellent series - Thank you. I use buildroot and yocto quite a bit, and welcome these videos. Notes: a) Append 'status=progress' to the dd line to have an indication of dd's progress. b) When using usermod to add yourself to a group (here dialout), one needs to use 'newgrp dialout' to activate it - else you have to open a new terminal to get it activated. Thanks a lot for all the work that went into making these videos!
I have been learning linux since before Red Hat's IPO. It's ability to run on old hardware, has made me always think about task oriented hardware. People throw old hardware to the curb because it is running slow. If it only has one task, it is a speed demon at that task
I'm definitely an openwrt fanboy. Routers are easy to come by (since no-one is happy with their 100Mb gear anymore) and have all the resources to be used as IoT controllers. And they are quite secure as openwrt is built with security in mind.
Great video! Build time for a raspberry pi zero w (v1.1) took my Thinkpad T470 about 1 hour and 9 minutes to run "make". Excited to learn more from this series!
That is High Quality Content. It is worth creating a whole course even bigger than the tutorials that will be available with tasks and more detailed explanations!
Correction: We do not have to completely rebuild the entire image in buildroot when we make any changes. We can avoid distclean and buildroot build system will automatically detect which changes are made and it will only build those packages where you make the changes.
AWESOME! It took me the better part of the day to get this working on an STM32MP157C_DK2 - mostly due to many problems with VirtualBox, but man did I learn a lot! Thank you!
Good to know about the sync argument, thanks! status=progress does not work on my version of Linux Mint, for whatever reason (that status just shows up at the end after dd is done).
Would be nice if you could go through some options in buildroot and show how complicated it would be to do something like add an i2c port or add some files to the image.
@@ShawnHymel you may be right, but in the video you said "now all we have to do is remove the card from our computer" so I figured a clarification would be good :)
You can do motor control using FreeRTOS for instance, just use kernel unaware interrupts for time critical interrupts that do the control work and the rest can be easily handled by OS threads. The price you pay is less time for OS tasks...
Thanks for your class which is really great, but I have a question here, as you're using STM32MP developing board, why didn't get the img and all developing stuff from ST directly, I think it will be more efficient than we build it ourselves, am I right? Hope to get the reply, thanks.
Hello Shawn and Digi-Key! Thanks for the amazing introduction to Embedded Linux and Buildroot! how to use gcc on the generated embedded linux image. because when i use pip to install python frameworks, i get a compile error, the system always works with the cross compiler that generated the linux image
Good question! From what I've gathered, you can't use Buildroot to include a compiler on the target (buildroot.org/downloads/manual/manual.html#faq-no-compiler-on-target). You can use another system (e.g. Yocto) to add such packages. In a future episode, I plan to show you how can cross-compile on your host machine to include a custom application in the target image.
Excellent I've been learning python for 2 years now. Was wondering if Linux would be useful in conjunction with python. I don't particularly care raspberry pi because of the amount of current it uses. Can't really do a stand alone project with it. But I'm glad brought up another board to use which is probably less of a energy hog. Really cool that SpaceX uses Linux to run the rockets
In my opinion, Linux and Python are two peas in a pod. Even if you're not too interested in Raspberry Pi; Linux itself, as pointed out in the video, is a very popular and powerful operating system. Learning how to use Linux isn't too difficult if you're already familiar with systems like Windows or MacOS. There is also a massive community of developers and users to support you in your pursuits. Python and Linux are both very useful in terms of embedded systems. SBC's and other small standalone electronics can be hard to develop for, especially if the hardware or applications are custom. This video series should elaborate more on the challenges of programming on embedded devices, but suffice it to say that having a good working knowledge of Linux is very handy if you're looking to program embedded devices yourself. I hope that helps.
I have wanted to dive into embedded Linux for a few years now and was wondering if you'd recommend this book: Mastering Embedded Linux Programming 3rd Edition
Couldn't I still run a customized Linux distribution on a raspberry pi? I wasn't sure if it was absolutely necessary to purchase a STM32MP157D-DK1 board to follow along instead of just using a raspberry pi I already have.
Thanks for the tip! I'll give it a shot, but I don't know if it works on all flavors: askubuntu.com/questions/215505/how-do-you-monitor-the-progress-of-dd
18:18 How did you know UART 4 was tied to the on-board ST-Link debugger? And how did you know the config file has UART 4 used as the console port by default?
Great overview! I needed this to see what I want to do with my Raspberry Pi. BTW, _router_ (a device that _routes_ packets) is pronounced identically to "rooter" because _route_ is pronounced identically to "root". A _router_ (a device that _routs_ things) would be a device that creates grooves in wood or metal, since the word there is _rout._
Great question! Most RTOSes can be made to be deterministic or non-deterministic, depending on how you configure the scheduler and heap allocation. As a result, your application is not guaranteed to be completely deterministic just because you use an RTOS (although, with the right settings, you can make it so). I might not have described it correctly in the video...but my thoughts for "strict timing" for baremetal include things like needing to sample a sensor every 200 microseconds. A time slice in most RTOSes is 1-10ms, so an RTOS won't help you meet that timing requirement. You can combine baremetal techniques and an RTOS (e.g. use a hardware timer to set up a sampling schedule and feed the data to a FIFO that's read by an RTOS task).
@@ShawnHymel Understood!, thanks, I also check your videos about FreeRTOS, they are great, could you recommend us extra material (courses, books, etc) to learn more about FreeRTOS and embedded Linux?
my stm32 board does not have a memory slot. what should be the right place to find the interface diagram. I can see stm32f429 is listed and I am using the Discovery board with OTG support.
You can always install VirtualBox and run Linux installations from there. And there are always possible to make some USB devices visible to the Virtual machine running Mint, Ubuntu or Debian.
