NaxdyOrg/embassy
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use constant for the pwm clock

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Description: So it can be used outside of the crate to calculate max duty
This commit is contained in:
Martin Marmsoler 2024-01-26 20:55:53 +01:00
parent 31fa0aebd8
commit dd2577fcf0
1 changed files with 3 additions and 2 deletions

5
embassy-nrf/src/pwm.rs
View file

@ -47,6 +47,7 @@ pub enum Error {
} }
const MAX_SEQUENCE_LEN: usize = 32767; const MAX_SEQUENCE_LEN: usize = 32767;
pub const PWM_CLK_HZ: u32 = 16_000_000;
impl<'d, T: Instance> SequencePwm<'d, T> { impl<'d, T: Instance> SequencePwm<'d, T> {
/// Create a new 1-channel PWM /// Create a new 1-channel PWM
@ -788,7 +789,7 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
/// Sets the PWM output frequency. /// Sets the PWM output frequency.
#[inline(always)] #[inline(always)]
pub fn set_period(&self, freq: u32) { pub fn set_period(&self, freq: u32) {
let clk = 16_000_000u32 >> (self.prescaler() as u8); let clk = PWM_CLK_HZ >> (self.prescaler() as u8);
let duty = clk / freq; let duty = clk / freq;
self.set_max_duty(duty.min(32767) as u16); self.set_max_duty(duty.min(32767) as u16);
} }
@ -796,7 +797,7 @@ impl<'d, T: Instance> SimplePwm<'d, T> {
/// Returns the PWM output frequency. /// Returns the PWM output frequency.
#[inline(always)] #[inline(always)]
pub fn period(&self) -> u32 { pub fn period(&self) -> u32 {
let clk = 16_000_000u32 >> (self.prescaler() as u8); let clk = PWM_CLK_HZ >> (self.prescaler() as u8);
let max_duty = self.max_duty() as u32; let max_duty = self.max_duty() as u32;
clk / max_duty clk / max_duty
} }