Quality RTOS & Embedded Software

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


Increasing configTICK_RATE_HZ beyond 1000?

Posted by Ron Blancarte on April 8, 2010
Is the maximum tick granularity 1000 Hz? I tried setting that higher than 1000, but that caused issues with anything that used portTICK_RATE_MS (bunch of divide by ZEROs). Or am I overthinking this and needing to change the application of portTICK_RATE_MS? Let me know.

RE: Increasing configTICK_RATE_HZ beyond 1000?

Posted by Richard on April 9, 2010
No you can make the tick faster than 1000Hz, but consider carefully if you really want to do this as 1000Hz is already fast, and the faster you make it the higher the kernel overhead will be.

You are indeed correct that going faster than 1000Hz will prevent portTICK_RATE_MS from working as the period will be sub 1ms. portTICK_RATE_MS is used for convenience in the demo applications, it is not used anywhere in the kernel code itself. Therefore, while setting the tick rate faster than 1000Hz would prevent the demo application tasks from working (without modification) it will not break the kernel itself.


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

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

Latest News

Version 10.1.0 of the FreeRTOS kernel is available for immediate download. MIT licensed.

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

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