FreeRTOS Programming

FreeRTOS summarized in one lecture!
Check out everything from concepts to practical know-how.

Lecture Topics 📖

What is RTOS?

RTOS is an operating system developed for real-time applications. It is used in embedded products in various fields including automotive, home appliances, medical, aerospace, defense, industrial control, and automation, as well as in environments where high performance and reliability are essential .

_{Even tasks requiring high levels (Hard-Realtime) can process results within a limited time through a real-time operating system.}

What is FreeRTOS?

As it is applied to various fields, RTOS also has various types and license forms. FreeRTOS is the best real-time operating system (RTOS) for microcontrollers and small microprocessors. FreeRTOS source code is distributed free of charge, so you can download FreeRTOS and start developing.

_{FreeRTOS (click)}

FreeRTOS is typically flashed into memory as a single image compiled with all the components needed for an embedded application.
Regardless of the microprocessor used, embedded application developers can use the same standardized interface to the FreeRTOS kernel and all FreeRTOS software libraries.

The FreeRTOS kernel is designed to be small, simple, and easy to use. A typical RTOS kernel binary image size is 4-9K bytes .

_{FreeRTOS compatible microcontroller boards are readily available for under $100 .}

In general, FreeRTOS-based applications have the advantage of being much simpler than Linux-based systems.

_{Source: VDC Research (click)}

Freeertos.org provides a series of detailed tutorials and guides on using the FreeRTOS kernel, including a quick start guide (click) . By supporting tickless interrupts, the microcontroller can remain in a DEEP SLEEP sleep state until an interrupt occurs or the RTOS kernel switches the task to a ready state.

Amazon has implemented a number of software libraries based on the FreeRTOS kernel that enable IoT devices to securely connect to its cloud . When Amazon FreeRTOS is deployed on IoT devices, they can securely connect to cloud services such as AWS IoT Core and be updated remotely using the OTA update feature.

You will learn: 📚

It is a well-known fact that FreeRTOS has a free and source code-based kernel .
So what's the real benefit of having access to the kernel's source?

The fact that the kernel I use provides source code means that users can look into its contents whenever they want. However, if our ultimate goal is to drive a car called RTOS well, wouldn't it be more helpful for me to spend more time and effort on things like following turn signals, complying with crosswalk safety obligations, observing the rearview mirrors, and not accelerating too quickly, rather than focusing on learning the structure or principles of internal combustion engine vehicles?

You can also analyze the kernel source code to improve the kernel performance, but I can't recommend it because every code modification comes with responsibility. Rather, I think it is valuable to find and fix problems in my application by using the kernel source code, or to gain a better understanding of how the kernel works.

From now on, we will summarize the essential information that we need to know to properly operate a car called FreeRTOS.

All of the above are the core topics of this lecture. Now, let's get into the details.

RTOS lecture know-how with over 13 years of experience 💡

After 13 years of teaching RTOS on-site, I decided to create online lectures to meet more learners. I will meet you as an online lecture that optimizes the content of 4 days of on-site lectures into 8 hours .

Recommended for these people! 🔑

First time with RTOS
Beginner learning

For FreeRTOS based products
For those who are thinking about optimization

Lightweight OS for the product
Those who wish to apply

IoT (Internet of Things)
developer

Besides that, it would be good for people like this to learn too!

👉 For those who want to kill two birds with one stone: hard real-time and stability of the product
👉 For those who want to compare and review with the Linux operating system
👉 Anyone who wants to increase their understanding of the operating system
👉 For those who do not have time to attend offline classes

What's special about this course ✨

• Feature 1. The video is divided into 180 subchapters, making it easier to find later.
• Feature 2. 2D animation was actively used to help with understanding.
• Feature 3. All practical examples come with TO-DO . This is a lecture where students can directly participate in the practical exercises.
• Feature 4. It helps you boldly discard unnecessary content and focus more on the core .
• Feature 5. We put in every effort to ensure that you can learn through videos alone, without having to look at the developer manual.

Check out the tools we use 🧰

• Compiler: STM32CubeIDE
• Practice board: STmicro official board (Nucleo, Discovery)
• 
• Hands-on examples and tutorial files: freeRTOS_tutorials.zip (files are in Section 0. Getting Started with FreeRTOS)
• The board used in the lecture is Nucleo-64 F103RB. However, the hands-on examples also support the following boards: DISCO_F429I, DISCO_F469I, NUCLEO_F401RE, NUCLEO_F767ZI, NUCLEO_L010RB (these files are in the last section).
• If the STM32 board you want is not in the list above, you can watch the video '(Appendix) Follow the lecture with my nucleo board' and then modify the source code of the practice example file (freeRTOS_tutorials) to fit your desired board and use it in this lecture, or ask the instructor to modify the source code to fit your desired board (free of charge. Usually takes 1-2 days. Apply in the Q&A corner.)

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