Search Results for "task"

Goal: multitasking kernel from scratch Target board: TI LAUNCHXL2-RM46

Free, simple and tiny cooperative operating system (OS) designed for deeply embedded applications. Target: ARM Cortex-M, STM8, AVR8. 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.

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.

...In this revision, 1.0, the event concept has been generalized. Events can now be broadcasted events, semaphores or mutexes. This permits to implement all the usual inter-task communication patterns. Please refer to the user guide and the diverse code samples for details. The second technical change is a complete revision of the makefile. It has been improved in many aspects and it now supports three host operating systems; the RTuinOS samples (as well as your applications) can be built under Linux, Windows and Mac OS. ...

...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

...The one task LED blink example only uses 5 bytes of RAM and 476 bytes of program memory for the whole program.

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.

...A key design objective is to use as little dedicated hardware as possible for communication between nodes in the network, and to be able to adapt the network topology in real-time so as to minimize the occurrence of collisions between packets. To achieve this, a protocol has been designed specifically for the task, and implemented in assembler for AVR microcontrollers. The project is currently at the stage of testing the protocol for bugs and implementing some simple devices which use it.

...When the target is reached the led looks for the next program and get new time and brightness. Leds and programs can be manipulated on the fly, in the program or from serialusb. A very simple task scheduler call the update of leds every 5ms, leaving plenty of processor for other tasks.

The embedded Single Timer Wheel (eSTW) is a timer wheel facility that can be used at task and interrupt level. The number of wheel spokes is user configured. The timer granularity is determined by the task signal or hardware interrupt source.

This project designs the oswrap including task scheduler, timer, semaphore, mailbox, wait, memory key components. Support Linux and windows platform and distributed system.