Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about what you can learn from RT-Thread. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

As a domestic RTOS with a history of more than ten years, RT-Thread has been tested for a long time and favored by users. At present, the development trend is booming, and RT-Thread 3.0is about to be released. There must be something worth thinking and learning, and we can also learn a lot of valuable experience from it.

Software engineering management

The code style of RT-Thread is excellent. In many cases, embedded software engineers, especially MCU software engineers, use relatively few chip resources, RAM and ROM are also slightly cramped, saving resources has become a high priority, and this has become an excuse for many engineers to code irregularities. Robust, modular, expandable, high cohesion, low coupling, this high-end term is always heard, I believe you have heard many times in a variety of scenarios. But put aside these high-end nouns, what on earth is good code?

Although RT-Thread did not emphasize these high-end nouns, there is no doubt that he explained them in code. The code style of RT-Thread is Linux/Unix-like code style. This style is not only reflected in the naming conventions of functions and variables, but also goes deep into the core of RT-Thread. For example, RT-Thread implements a device driver framework, which divides device types into character devices, block devices, network interface devices, memory devices, CAN devices, RTC devices, sound devices, graphics devices, I2C bus devices, and so on. During initialization, the driver is bound to the device driver through a string (an easy-to-remember name that can be customized by the user), and the driver is registered with the kernel, and only a string is called to match the device. Isolation and decoupling can be achieved without the need for various header files to be included and re-encapsulated.

RT-Thread provides Finsh and msh components, which are very unique components that can easily interact with the system kernel in debugging and development, and are very convenient to use. How to write excellent code in the resource-scarce embedded software development, RT-Thread is very worthy of our thinking and learning.

Open source spirit

RT-Thread is the first echelon of embedded open source projects in China, and because of open source and community, RT-Thread has thrived and won a high reputation among developers. A large number of developers have participated in the development of RT-Thread. RT-Thread real-time operating system follows the GPLv2+ license, the real-time operating system kernel and all open source components can be used in commercial products free of charge, there is no need to publish the application source code, there is no potential commercial risk. This open source spirit is very admirable.

Thanks to the open source of RT-Thread, we can submit our code, review it and merge it into the master branch. In the process of use, when there is a doubt or problem with a module, we can directly discuss it with the developer or even the founder. This experience is very wonderful and is not available in other RTOS.

RT-Thread advocates people to participate in the process of RT-Thread development, such as coding, bug fixes, documentation, and so on. In fact, once what you submit is adopted and merged, it is also a very fulfilling thing.

We can also learn the open source spirit of RT-Thread, open source our spare time code, or actively participate in open source projects. While it is convenient for everyone to use, through more extensive discussion, it is also equivalent to having more people to help review, accept everyone's criticism and suggestions, and achieve faster progress.

The above is what the editor can share from RT-Thread. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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