FreeRTOS on the Raspberry Pi Pico (RP2040) Part 5: Semaphores

FreeRTOS is an open source Real Time OS available for a wide range of microcontrollers and this video is part 5 in a series on using FreeRTOS on RP2040 based boards such as the Raspberry Pi Pico. In this video we show you how the FreeRTOS semaphores work and we briefly cover how to use semaphores , what they are and when not to use them. By the end of this tutorial you will have a project which explains how semaphores can be used as an event counter and synchroniser. Binary semaphores are used for both mutual exclusion and synchronisation purposes. Counting semaphores are typically used for counting events and resource management.

The written version of this tutorial and the code used is available: https://learnembeddedsystems.co.uk/freertos-on-the-rp2040-part-5-semaphores
Template Project Repo:
https://github.com/LearnEmbeddedSystems/rp2040-freertos-project
GitHub Command: "git clone --recurse-submodules https://github.com/LearnEmbeddedSystems/rp2040-freertos-project"

Playlist of FreeRTOS on the RP2040: https://www.youtube.com/playlist?list=PLEB5F4gTNK68zDlrXbcCgJ6NejaP0PvHX

In this tutorial we create a simple program where a Raspberry Pi Pico uses two FreeRTOS tasks to print to a command line over the USB interface which task is running.

Timestamps
00:00 Intro
00:43 What is a Binary Semaphore?
02:33 What is a Counting Semaphore?
04:02 FreeRTOS API Calls
04:50 Example
08:30 Conclusion

If this video helped you, please consider leaving a like and subscribing, thank you!

To see our videos on the Raspberry Pi Pico, check out the playlist here: https://www.youtube.com/playlist?list=PLEB5F4gTNK68IlRIJtcJ_2cW4dSdmreTw

You can find more embedded systems tutorials and projects on our website https://learnembeddedsystems.co.uk

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Видео FreeRTOS on the Raspberry Pi Pico (RP2040) Part 5: Semaphores канала Learn Embedded Systems