# ChibiOS/RT

> operating system

**Wikidata**: [Q1603924](https://www.wikidata.org/wiki/Q1603924)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ChibiOS/RT)  
**Source**: https://4ort.xyz/entity/chibios-rt

## Summary
ChibiOS/RT is a copyrighted real-time operating system licensed under the GNU General Public License. It is designed to process data with minimal delay, making it suitable for time-critical applications, and is known to run on platforms such as Axoloti. The operating system has seen continuous development, with its latest documented version being 21.11.3 (Montepertuso).

## Key Facts
- ChibiOS/RT is classified as an operating system and, more specifically, a real-time operating system.
- It is licensed under the GNU General Public License and is copyrighted.
- The latest documented version of ChibiOS/RT is 21.11.3 (Montepertuso), published on December 29, 2022.
- A preferred version, 18.2.1, was released on May 1, 2018.
- ChibiOS/RT is known to run on the Axoloti platform.
- The official website for ChibiOS/RT is http://www.chibios.org.
- Its preferred source code repository is located at https://svn.code.sf.net/p/chibios/code/trunk.

## FAQs
### Q: What kind of software is ChibiOS/RT?
A: ChibiOS/RT is an operating system, specifically classified as a real-time operating system. This means it is designed to process data as it comes in with minimal delay, making it suitable for applications where precise timing is critical.

### Q: What is the license for ChibiOS/RT?
A: ChibiOS/RT is licensed under the GNU General Public License. It is also explicitly noted as copyrighted.

### Q: What is the latest documented version of ChibiOS/RT?
A: The latest documented version of ChibiOS/RT is 21.11.3, codenamed "Montepertuso," which was published on December 29, 2022. A preferred version, 18.2.1, was released on May 1, 2018.

### Q: What hardware is ChibiOS/RT known to run on?
A: ChibiOS/RT is known to run on the Axoloti platform.

### Q: Where can I find the source code for ChibiOS/RT?
A: The preferred source code repository for ChibiOS/RT is located at https://svn.code.sf.net/p/chibios/code/trunk. An older repository at OSDN was active until January 3, 2023.

## Why It Matters
ChibiOS/RT holds significance as a real-time operating system (RTOS) by providing the essential software foundation for applications demanding precise timing and minimal latency. In critical domains such as embedded systems, robotics, industrial automation, and specialized hardware like Axoloti, an RTOS like ChibiOS/RT is crucial for ensuring that data is processed immediately upon arrival. This immediate processing prevents delays that could compromise system performance, reliability, or safety. Its licensing under the GNU General Public License fosters broad adoption and modification by a diverse community of developers, encouraging innovation and customization across various hardware platforms. The consistent development, evidenced by multiple versions up to 21.11.3, highlights its ongoing relevance and utility in supporting modern embedded projects that require dependable and efficient resource management. ChibiOS/RT empowers developers to create robust and responsive systems where predictable execution is paramount.

## Notable For
- **Real-time Performance:** ChibiOS/RT is specifically engineered as a real-time operating system, ensuring minimal delay in data processing for time-critical applications.
- **Open-Source Licensing:** It is licensed under the GNU General Public License, promoting free use, distribution, and modification of its source code.
- **Axoloti Compatibility:** ChibiOS/RT is known to run on the Axoloti platform, indicating its utility in specific embedded applications such as digital audio.
- **Active Development:** The operating system has seen continuous development, with documented versions up to 21.11.3 (Montepertuso) published in late 2022.

## Body
### Overview
ChibiOS/RT is a copyrighted operating system. It functions as a real-time operating system, meaning it is engineered to process incoming data with minimal delay.

### Classification
ChibiOS/RT is classified as an operating system, which is software responsible for managing computer hardware resources. More specifically, it is an instance of a real-time operating system, a category of operating systems intended for time-sensitive data processing.

### Licensing and Copyright
The software is licensed under the GNU General Public License. ChibiOS/RT is also explicitly noted as copyrighted.

### Versions and Development
ChibiOS/RT has undergone continuous development, with several documented versions. A notable version is 16.1.8, released on April 25, 2017. Version 18.2.1 is designated as a preferred version, released on May 1, 2018. The latest documented version is 21.11.3, codenamed "Montepertuso," which was published on December 29, 2022, with a release date of February 16, 2023.

### Compatibility
ChibiOS/RT is known to run on the Axoloti platform.

### Source Code
The primary and preferred source code repository for ChibiOS/RT is located at https://svn.code.sf.net/p/chibios/code/trunk. An alternative source code repository was available at https://osdn.net/projects/chibios/scm/svn/ until January 3, 2023. The official website for ChibiOS/RT is http://www.chibios.org.

## References

1. [Source](http://www.chibios.com/forum/viewtopic.php?f=7&t=3086#p29275)
2. [Source](http://www.chibios.com/forum/viewtopic.php?f=7&t=4487&p=32724#p32724)
3. [2022](https://forum.chibios.org/viewtopic.php?f=7&t=5963#p41646)
4. [2025](https://forum.chibios.org/viewtopic.php?f=7&t=5963&p=43474#p43474)
5. Freebase Data Dumps. 2013