# System Tick for FreeRTOS

**URL:** <https://forums.freertos.org/t/system-tick-for-freertos/5634>\
**Category:** Kernel\
**Created:** [February 7, 2010, 10:04pm UTC](https://forums.freertos.org/t/system-tick-for-freertos/5634 "2010-02-07T22:04:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [February 7, 2010, 10:04pm UTC](https://forums.freertos.org/t/system-tick-for-freertos/5634/1 "2010-02-07T22:04:29Z")

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**[spotdott](https://sourceforge.net/u/spotdott/)** wrote on [Sunday, February 07, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/f9645968/#06fd):

Hi, I’m trying make the transition from a uC/OS II based STM32 to FreeRTOS.&nbsp; I remembered that I must configure the the tick source (a timer, usually) and tick interrupt service routine for uc/OS II.&nbsp; Is there a similar thing I must do for FreeRTOS or is it already taken care of?&nbsp; I’m using one of the demo projects targeted at STM32 Cortex M3 cores.

Thanks!

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [February 8, 2010, 7:37am UTC](https://forums.freertos.org/t/system-tick-for-freertos/5634/2 "2010-02-08T07:37:50Z")

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**[davedoors](https://sourceforge.net/u/davedoors/)** wrote on [Monday, February 08, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/f9645968/#52d6):

It is done for you. The Cortex M3 ports all use the core SysTick timer. It is started by the kernel.

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [February 8, 2010, 9:31pm UTC](https://forums.freertos.org/t/system-tick-for-freertos/5634/3 "2010-02-08T21:31:55Z")

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**[spotdott](https://sourceforge.net/u/spotdott/)** wrote on [Monday, February 08, 2010](https://sourceforge.net/p/freertos/discussion/382005/thread/f9645968/#01d7):

That’s good to know.&nbsp; Thanks!