Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


Is it possible to use coroutines only, no ISR

Posted by Kufer on January 21, 2009

I'm using AVR atmega. There are several Interrupts around in my application, one requires a 10us reaction time. So I can hold cli() state only for a short time.

a) How long will freertos be in disable interrupt state? cycles?

b) is it possible, to use only coroutines, do the task switch only with taskYield() ?

Thanks Wolfgang

RE: Is it possible to use coroutines only, no

Posted by Richard on January 22, 2009
You can run FreeRTOS in several different ways, fully preemptive, cooperative, or a hybrid (which basically means turning off the time slicing). Co-routines normally run in the idle task and need at least a tick to measure time.

[ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS v10.2.0 is available for immediate download. MIT licensed, and including RISC-V and ARMv8-M (Cortex-M33) demos.

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


FreeRTOS and other embedded software careers at AWS.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Cadence Tensilica Cortes

Espressif ESP32

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers





STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS

Xilinx Microblaze and Zynq partner