From d1db7d90434e7cf8d82361818427942c19923726 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?D=C3=A1niel=20Buga?= Date: Fri, 25 Oct 2024 18:53:59 +0200 Subject: [PATCH] Explain how to keep the executor awake --- docs/pages/faq.adoc | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/docs/pages/faq.adoc b/docs/pages/faq.adoc index 8eb947b5e4..d4f49bfc19 100644 --- a/docs/pages/faq.adoc +++ b/docs/pages/faq.adoc @@ -372,3 +372,16 @@ Issues like these while implementing drivers often fall into one of the followin 3. Some kind of hardware errata, or some hardware misconfiguration like wrong clock speeds 4. Some issue with an interrupt handler, either enabling, disabling, or re-enabling of interrupts when necessary 5. Some kind of async issue, like not registering wakers fully before checking flags, or not registering or pending wakers at the right time + +== How can I prevent the thread-mode executor from going to sleep? == + +In some cases you might want to prevent the thread-mode executor from going to sleep, for example when doing so would result in current spikes that reduce analog performance. +As a workaround, you can spawn a task that yields in a loop, preventing the executor from going to sleep. Note that this may increase power consumption. + +[source,rust] +---- +#[embassy_executor::task] +async fn idle() { + loop { embassy_futures::yield_now().await; } +} +----