37 lines
799 B
Rust
37 lines
799 B
Rust
use rtic::cyccnt::{Duration, Instant, U32Ext};
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use stm32h7xx_hal::time::Hertz;
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pub struct CycleCounter {
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next_tick: Instant,
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ticks: u32,
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increment: Duration,
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}
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impl CycleCounter {
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pub fn new(
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mut dwt: cortex_m::peripheral::DWT,
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cpu_frequency: impl Into<Hertz>,
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) -> Self {
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dwt.enable_cycle_counter();
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let increment =
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((cpu_frequency.into().0 as f32 / 1000.0) as u32).cycles();
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Self {
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increment,
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ticks: 0,
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next_tick: Instant::now() + increment,
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}
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}
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pub fn current_ms(&mut self) -> u32 {
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let now = Instant::now();
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while now > self.next_tick {
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self.next_tick += self.increment;
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self.ticks += 1;
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}
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self.ticks
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}
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}
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