CooCox Embedded Real-Time Operating System - CoOS

atomar — Fri, 08 Oct 2021 04:57:38 GMT

Current Revision posted to Documents by atomar on 10/8/2021 4:57:38 AM

Features
Technical Specifications
Supported Device
Video
Technical Documents

Overview

CoOS is a free and open RTOS from CooCox, designed specifically for Cortex-M processor, supports preemptive priority and round-robin, Semaphore, Mutex, Flag, Mailbox and Queue for communication & synchronization, highly scalable, minimum system kernel is only 974Bytes, supports interrupt while task switching, supports stack overflow detection, supports the platforms of ICCARM, ARMCC, GCC. CoOS is also free and open-source for business users.

In CooCox CoIDE, CoOS is a component, user can add CoOS source code to their project only by clicking CoOS component and then could use it after modifying its task number, stack, system clock frequency and other corresponding configurations in the OS_Config.h configuration file according to their project. By viewing and trying the CoOS examples shown in Example window, anyone can easily achieve the application programming of CoOS.

Features

Free and open real-time Operating System
Specially designed for Cortex-M series
Scalable, minimum system kernel is only 974Bytes
Adaptive Task Scheduling Algorithm.
Supports preemptive priority and round-robin
Interrupt latency is next to 0
Stack overflow detection option
Semaphore, Mutex, Flag, Mailbox and Queue for communication & synchronisation
Supports the platforms of ICCARM, ARMCC, GCC

Technical Specifications

Time Specifications:

N Function	Time (No Robin / Robin)
Create defined task, no task switch	5.3us / 5.8us
Create defined task, switch task	7.5us / 8.6us
Delete task (ExitTask)	4.8us / 5.2us
Task switch (SwitchContext)	1.5us / 1.5 us
Task switch (upon set flag)	7.5us / 8.1us
Task switch (upon sent semaphore)	6.3us / 7.0us
Task switch (upon sent mail)	6.1us / 7.1us
Task switch (upon sent queue)	7.0us / 7.6us
Set Flag (no task switch)	1.3us / 1.3us
Send semaphore (no task switch)	1.6us / 1.6us
Send mail (no task switch)	1.5us / 1.5us
Send queue (no task switch)	1.8us / 1.8us
Maximum interrupt lockout for IRQ ISR's	0 / 0

Space Specifications:

Description	Space
RAM Space for Kernel	168 Bytes
Code Space for Kernel	974 Bytes
RAM Space for a Task	TaskStackSize + 24 Bytes(MIN) TaskStackSize + 48 Bytes(MAX)
RAM Space for a Mailbox	16 Bytes
RAM Space for a Semaphore	16 Bytes
RAM Space for a Queue	32 Bytes
RAM Space for a Mutex	8 Bytes
RAM Space for a User Timer	24 Bytes

* The data for CoOS kernel is measured for STM32F103RB CPU with the system clock setting to 72 MHz, code execution from internal flash, with Flash Latency 2 wait states and the Prefetch Buffer enabled.

Supported Device

CoOS supports all ARM Cortex M3 and Cortex M0 based devices, here only lists some of the most commoused:

ST STM32 Series
Atmel ATSAM3U Series
NXP LPC17xx LPC13xx LPC11xx Series
Toshiba TMPM330 Series
Luminary LM3S Series
NuvotoNUC1xx Series
Energy Micro EFM32 Series

Video

www.youtube.com/watch

Technical Documents

Learning Center

Type	Description
User Guide	CooCox: User Guide for CooCox CoOS Operating System
User Guide	CooCox: User Guide for CooCox CoIDE Development Tool

Design Elements

Type	Description
CoOS V1.1.4	Download 664KB

Tags: coocox, coos