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HW-RTOS

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Overview

HW-RTOS is a hardware real-time OS. HW-RTOS realizes excellent real-time performance with low overhead compared to conventional software RTOS implementations. It supports semaphore, event flags, and about 30 other standard APIs, and enables fast, consistent execution time and interrupt response. This enables a worst-case execution time to be specified, which facilitates the design of real-time systems.

Challenges in Real-time Embedded Systems
HW-RTOS Tick Offloading
HW-RTOS HW ISR
Challenges in Real-time Embedded Systems
HW-RTOS Tick Offloading
HW-RTOS HW ISR
  • Fast API Execution
  • Quick Interrupt Response
  • Reduced RTOS Overhead
  • World's top RTOS Performance
  • Tick Offloading
  • HW ISR (Hardware Interrupt Service Routine)
  • Small Footprint

Documentation

Resources

Support

Video Tutorials

Learn more about HW-RTOS from these tutorials:

  1. Benefit of Hardware RTOS (1/3) - Introduction
  2. Benefit of Hardware RTOS (2/3) - Functions and performance
  3. Benefit of Hardware RTOS (3/3) - Next Generation

Learn about basics of conventional software-based real-time OS:

  1. Why RTOS is required?
  2. Task, handler and API
  3. Semaphore and event flag
  4. Architecture and Performance of RTOS
  5. RTOS for Multi-core systems

Support Communities

  1. Sync0 ISR jitter issue in EC-1/RZ-T

    I use EC-1 to make a EtherCAT slave device, and indeed EC-1 is a function reduced version on RZ-T, so I post this question here. Now , EtherCAT DC can work well in the DC mode , but I want to check Sync ISR jitter performance. So in the ...

    Jun 10, 2020
  2. RZ/N1: can we connect both GMAC to the switch

    Hi there, My goal is to have a single Ethernet port that is connected to both GMAC of RZ/N1D: GMAC1 being run by Linux on dual A7 and HW-RTOS GMAC managed by M3. Alternatively, we may also want to dedicate GMAC1 to one A7 core and GMAC2 ...

    Apr 10, 2020
  3. Regarding RZ/N1D 5-port switch, Is there any Application notes or Reference source?

    I am developing a driver for RZ/N1D 5-port switch for a custom RTOS. I face an issue of losing response packets for ping command. Few times, ping commands gets response, but few times not getting response packets. I want to check the overall configuration of the Ethernet ...

    Dec 3, 2021

Knowledge Base

  1. RZ Family: Can HW-RTOS-GMAC be used even if HW-RTOS does not used?

    ... is enabled Question Is it possible to use HW-RTOS GMAC without enabling HW-RTOS? If so, how to configure the parameters?   Answer Yes, the HW-RTOS GMAC function can be configured independently, even if HW-RTOS itself is disabled.HW-RTOS initializes HW-RTOS GMAC, so if HW-RTOS ...

    Nov 14, 2025
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