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zephyr: time: Add "now" for Instant #49

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zephyr: time: Add "now" for Instant #49

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9 changes: 9 additions & 0 deletions zephyr/src/time.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,15 @@ pub type Duration = fugit::Duration<Tick, 1, SYS_FREQUENCY>;
#[cfg(CONFIG_TIMEOUT_64BIT)]
pub type Instant = fugit::Instant<Tick, 1, SYS_FREQUENCY>;

/// Returns an Instant corresponding to "now".
// Since the ticks are coming from Zephyr they should be safe to put into the Instant
#[cfg(CONFIG_TIMEOUT_64BIT)]
pub fn now() -> Instant
{
let t = unsafe { crate::raw::k_uptime_ticks() };
Instant::from_ticks(t.try_into().unwrap())
}

// The Zephyr `k_timeout_t` represents several different types of intervals, based on the range of
// the value. It is a signed number of the same size as the Tick here, which effectively means it
// is one bit less.
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