# RTOS & CMCIS

**URL:** <https://forums.freertos.org/t/rtos-cmcis/3671>\
**Category:** Kernel\
**Created:** [November 24, 2014, 8:37pm UTC](https://forums.freertos.org/t/rtos-cmcis/3671 "2014-11-24T20:37:14Z")\
**Posts on this page:** 2\
**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:** [November 24, 2014, 8:37pm UTC](https://forums.freertos.org/t/rtos-cmcis/3671/1 "2014-11-24T20:37:14Z")

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**[ed711](https://sourceforge.net/u/ed711/)** wrote on [Monday, November 24, 2014](https://sourceforge.net/p/freertos/discussion/382005/thread/9df0fa9b/#e46d):

Does FREERTOS require CMSIS?  
I would like to convert an existing LPC1788 project to use FREEROTS.  
I cannot find any documentation on adding FREERTOS to an existing project.

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [November 24, 2014, 9:55pm UTC](https://forums.freertos.org/t/rtos-cmcis/3671/2 "2014-11-24T21:55:34Z")

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**[edwards3](https://sourceforge.net/u/edwards3/)** wrote on [Monday, November 24, 2014](https://sourceforge.net/p/freertos/discussion/382005/thread/9df0fa9b/#d863):

No. FreeRTOS has been around much longer than CMSIS.

Do these links help?  
[http://www.freertos.org/Creating-a-new-FreeRTOS-project.html](http://www.freertos.org/Creating-a-new-FreeRTOS-project.html)  
[http://www.freertos.org/porting-a-freertos-demo-to-different-hardware.html](http://www.freertos.org/porting-a-freertos-demo-to-different-hardware.html)