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WHAT'S NEW
FreeRTOS website now available in Simplified Chinese
Search and browse content in your preferred language. See the blog post.
New FreeRTOS Long Term Support version now available.
Receive security patches and critical bug fixes on FreeRTOS libraries for two years. See the blog post.
FreeRTOS Extended Maintenance Program (EMP) registration now open.
Providing security patches and critical bug fixes on FreeRTOS Long Term Support (LTS) versions for up to 10 additional years. See the blog post.
FreeRTOS-Plus-TCP v3.0.0 released:
We've added comprehensive unit tests and penetration and protocol testing. See the blog post.
Featured FreeRTOS IoT Integrations:
Introducing three featured integrations for more secure IoT applications. See the blog post.

Software Timers
[More about software timers...]

Resetting a software timer

It is possible to re-set a timer that has already started to run. Resetting a timer results in the timer recalculating its expiry time so the expiry time becomes relative to when the timer was reset, and not when the timer was originally started. This behaviour is demonstrated in the next diagram, where Timer 1 is a one-shot timer that has a period equal to 5 seconds.

In the depicted example, it is assumed that the application switches on an LCD back-light when a key is pressed, and that the back-light remains on until 5 seconds pass without any keys being pressed. Timer 1 is used to switch off the LCD back-light when this 5 seconds has elapsed.

The behaviour of one-shot timers and auto-reload timers
Timer behaviour when a timer is reset




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