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From: Pancho <Pancho.Jones@proton.me>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Need help with PI PICO...
Date: Mon, 25 Mar 2024 11:31:16 +0000
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On 24/03/2024 11:13, The Natural Philosopher wrote:

> However on trawling the internet I discovered a conversation  with 
> someone else *on here* (c.s.r-pi) last year, who was finding that 
> *sleep_us(x)* was highly inconsistent for certain (small) values of x. 
> Sometimes taking a day to end.
> 
> Further investigation reveals that in fact it really is a 'sleep' with 
> the processor being put in low power mode and requiring an interrupt to 
> 'wake it up'.
> 

Why not use threads/timers, wait on a lock/semaphore rather than sleep.

But looking at PICO code samples, they commonly use sleep, so I'd be 
surprised if it was that bad.