HRTOS Releases

Explore the development history of HRTOS, from its foundation in 2017 to the HRTOS 4.0 generation. Discover the evolution of a dedicated operating system for the 8051 and MCS-51 microcontroller ecosystem.

CURRENT GENERATION

HRTOS 4.0

HRTOS 4.0 brings together the operating system kernel, system APIs, extensions, hardware support, driver resources, application examples and technical documentation.

The project is dedicated to 8051 and MCS-51 microcontrollers, with Keil C51 as its primary development toolchain.

Architecture 8051 / MCS-51
Toolchain Keil C51
Generation 4.0

Project Milestones

The development history of HRTOS reflects a continued commitment to the 8051 platform, operating system engineering and long-term project maintenance.

2026

HRTOS 4.0 Generation

HRTOS entered its 4.0 generation, with an emphasis on system organization, technical documentation, hardware testing and reusable development resources.

  • HRTOS 4.0 system generation
  • Organized kernel and API resources
  • Expanded technical documentation
  • Hardware testing and evaluation
  • Driver and application examples
January 14, 2019

HRTOS v3.20

HRTOS v3.20 is an important documented milestone in the project's development. Its historical version banner records January 14, 2019.

  • Version: v3.20
  • Recorded date: January 14, 2019
  • 8051 operating system development
November 2017

HRTOS Project Founded

HRTOS originated in November 2017 with the goal of developing an operating system for embedded applications based on the 8051 microcontroller architecture.

  • Project foundation
  • Dedicated 8051 development direction
  • Long-term operating system development

Beyond the Kernel

HRTOS is developed as a complete operating system environment, supported by interfaces, extensions and engineering resources for 8051 applications.

01

Operating System Kernel

Core scheduling mechanisms, task management, context switching and operating system execution services.

Kernel Architecture
02

System APIs

Interfaces for task management, timing, synchronization, events and inter-task communication.

API Documentation
03

System Extensions

Additional modules including Modbus RTU, shell utilities and cooperative execution support.

Explore Features
04

Hardware Support

Hardware adaptation and testing resources for selected 8051-compatible microcontroller families.

Hardware Information
05

Driver Library

Reusable peripheral and sensor drivers covering common hardware interfaces and embedded application requirements.

Browse Drivers
06

Examples and Documentation

Technical references, development guides and practical application examples for system integration.

Browse Examples

Built for Long-Term Maintenance

HRTOS development emphasizes the continued improvement and preservation of an established 8051 operating system ecosystem.

Kernel Reliability

Preserve the existing system architecture, maintain core mechanisms and address verified issues when necessary.

Technical Documentation

Maintain API references, system manuals and practical development guides to support long-term use.

Application Resources

Accumulate reusable drivers, peripheral support and practical application components for the 8051 ecosystem.

HRTOS at a Glance

Key project information for developers evaluating the HRTOS operating system.

Category Information
Project HRTOS
Current Major Generation HRTOS 4.0
Target Architecture 8051 / MCS-51
Primary Development Toolchain Keil C51
Hardware Platforms Selected STC12 and STC8 microcontrollers
Historical Version HRTOS v3.20
Historical Version Date January 14, 2019
Project Founded November 2017

Start Developing with HRTOS

Explore the technical resources available for understanding, configuring and integrating HRTOS into embedded applications.

System Documentation

Understand the operating system structure, configuration requirements and available system services.

Read Documentation

Hardware Platforms

Review supported hardware families and the development environment used for HRTOS integration.

Hardware Information

Application Examples

Explore practical examples demonstrating how HRTOS services can be used in embedded applications.

Explore Examples

Engineering Real-Time on 8051

Discover the HRTOS operating system, explore its engineering resources and learn more about the complete 8051 development ecosystem.