/products/raspberry-pi/b/blog/posts/guard-adc-peripheral-access-with-a-mutex-for-the-multi-core-freertos-smp-project-with-the-raspberry-pi-picoFreeRTOS Symmetric Multiprocessing (SMP) is a recent version of the RTOS that can schedule tasks across multiple controller cores. It&#39;s currently in test phase, and they have a version for the RP2040. In this blog post, I protect the AD...en-USTelligent Community 12https://community.element14.com/products/raspberry-pi/b/blog/posts/guard-adc-peripheral-access-with-a-mutex-for-the-multi-core-freertos-smp-project-with-the-raspberry-pi-picoSat, 01 Oct 2022 18:41:23 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:387174df-62c4-4013-8109-cf5e15de8ebaDAB1<p>It looks like a simple mutex implementation.</p> <p>I am not sure sharing an ADC is a good idea unless you have a matrix of the inputs so you can select a separate channel each time.</p><img src="https://community.element14.com/aggbug?PostID=24493&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/products/raspberry-pi/b/blog/posts/guard-adc-peripheral-access-with-a-mutex-for-the-multi-core-freertos-smp-project-with-the-raspberry-pi-picoThu, 29 Sep 2022 21:37:12 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:387174df-62c4-4013-8109-cf5e15de8ebashabaz0<p>An example (maybe not realistic depending on the underlying behavior, but it&#39;s a nice simple way of representing), what happens if no semaphore is used : )</p> <p>Here the critical section of code is the print statement.</p> <p><img src="/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-387174df-62c4-4013-8109-cf5e15de8eba/pastedimage1664487365378v1.png" alt=" " /></p><img src="https://community.element14.com/aggbug?PostID=24493&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">