Search Results for "task"

.... ## 🧭 Objectives - Learn and master : - Low-level C language - x86/x86_64 assembler - Modern processor architecture - Fundamental principles of operating systems - Develop a microkernel : - Lightweight and modular - Able to handle hardware interrupts (keyboard, timer) - Support minimal user space - Evolve to a simple OS: - With a rudimentary shell - Isolated user processes - A basis for experimenting with system concepts ## ⚙️ Project status > 🚧 Project under development - Learning phase (year 1) Short-term planned features : - [ ] Multiboot-compatible GRUB bootloader - [ ] Text mode display (VGA) - [ ] Interrupt management (IRQ / keyboard) - [ ] First task manager loop

Free, extremely simple, amazingly tiny and very fast real-time operating system (RTOS) designed for deeply embedded applications. Target: ARM Cortex-M, STM8. It was inspired by the concept of a state machine. Procedure executed by the task (task state) doesn't have to be noreturn-type. It will be executed into an infinite loop. There's a dedicated function for immediate change the task state.

...It presently supports the AVR and MSP430 architectures. The advantages of PRTOS are: It has the smallest footprint of any true preemptive system: 1.9kB for basic scheduling and task control, 5.1kB with all the features below (AVR '328 / gcc -Os); Only 950 lines of code implement all of the RTOS features (SLOC-L); The system is well documented with a comprehensive manual, well-commented source code, and a test suite demonstrating the features; The system is proven - it has been in use since 1982 with applications in in-vitro medical equipment, process control instrumentation and industrial machinery; PRTOS is released by Cleveland Engineering Design, LLC - developer of the CoRTOS cooperative RTOS https://sourceforge.net/projects/cortos-simple/ and the CTREE analysis tool https://sourceforge.net/projects/ctree-graphic-tree-generator/ Commercial licensing is available

...it is depends modules your chosen. **CORE also TAKE TIMER0 to tick for real-timing, and need xdata for HEAP CORE Support **dynamic Create/Terminate Thread(TASK) **Synchronize Object (Event / Semaphore / Critical Section), Thread(TASK) Naturally GIVES UP CPU by WaitFor these Synchronize Object **Common IO, it is STD C open/read/write in Any Stream Like IO(I2C, UART etc.) I host this project for OS studying, and Also Used in my work. SRC can be download from SVN Repository

AvRtos is a small, preemtive, priority based real time operating system for Atmel AVR and ARM microcontrollers. It was written in C. AvRtos provides message queues and semaphores for task synchronization. It uses a static memory allocation scheme. AvRtos is nearly the smallest RTOS out there. Even pico]OS is much bigger. AvRtos can be compiled using gcc compiler. There is a AvrStudio 4 and Eclipse project file to get the example code working very quickly.

...They are frequently also referred to as real-time operating systems, and the term RTOS is often used as a synonym for embedded operating system. EXIRION/OS project, a Open operating system for computers that can be used in specific operations that require execute a task at a time, EXIRION/OS operating system is a monolithic and mono layered task, which can be used to control complex electronic equipment without the use of instruments PLC, offering a wide range of electronic and industrial applications, EXIRION/OS is also an educational tool, it is an open source operating system to use it as an example of building operating systems in universities and technical colleges.

qtOS is an operating system for running systems of finite-state machines. The system kernel is a task scheduler that runs processes' transitions at every cycle. Each task is activated either to be run in parallel (fork) with other active processes in the system or subordinated to the caller task, thus blocking it and creating a hierarchy of tasks. Execution of processes can be preemptive or non-preemptive and, among those with the same priority, a round-robin turn is performed. ...

Mini Vezer OS (MVOS) is a minimal footprint simple embedded OS-like task scheduler implementing cross-task communication, primarily designed for the Freescale HCS08 microcontroller.

Driver module using rtc-driver allowing multiple users to use the real-time-clock. Each task opening the timer device gets its own image of the RTC. Except setting the RTC, all features can be used on a per task basis without frequency restriction.

A lightweight, simple and easy to use embedded system task scheduler. RataOS is written as a high level C, with a simple HAL & API structure, allowing it to be ported between embedded devices easily.

CleanOS is an operating system developed for educational purposes, initially to be an userspace GNU/Linux application running its executables and simulating the operating system task scheduler and IPC mechanisms. Now it supports a true i386 kernel.

Tasks often depend on each other because of inter-process communication/synchronization. Task dependency have significant impact on performance. swap-sched solves the problem by dynamically detects dependency and use it for scheduling.

UCOS is a micro kernel OS which is orinially intended for teaching. Yet the free UCOS kernel has it's limitations such as limited task quantity, priority reversion. There are tremendous work to be done!

Pistrix (lat. Shark) is a Open Source project of Operation System, written on Assembly and C Languages. The OS model is microkernel, because the basic task of the Pistrix is Speed and Small Size.

GrindarsOS - 32bit protect-mode one-task operating system.

uSmartx is a non-preemptive, multitasking, priority based kernel for use in embedded designs. Its major features are task and time control over system resources, inter task communication and simple memory management.

ftRTOS is a tiny realtime kernel for microcontrollers focused on minimal RAM usage. Fixed priority scheduling, preemptive or cooperative multitasking, no dynamic task and memory management, all objects are defined at compile time.