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align pwm.set_duty with embedded hal to not be one shot

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This commit is contained in:
Jacob Rosenthal 2021-11-01 13:00:50 -07:00
parent 5285179218
commit f2cfbe4262
1 changed files with 8 additions and 1 deletions
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9
embassy-nrf/src/pwm.rs
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@ -282,8 +282,15 @@ impl<'d, T: Instance> Pwm<'d, T> {
let s = T::state(); let s = T::state();
unsafe { (*s.duty.get())[channel] = duty & 0x7FFF }; unsafe { (*s.duty.get())[channel] = duty & 0x7FFF };
// todo justify? should i fence elsehwere we task start? or
compiler_fence(Ordering::SeqCst); compiler_fence(Ordering::SeqCst);
T::regs().tasks_seqstart[0].write(|w| unsafe { w.bits(1) });
// play duty cycle infinitely
let r = T::regs();
r.loop_.write(|w| unsafe { w.cnt().bits(0x1) });
r.shorts.write(|w| w.loopsdone_seqstart0().enabled());
// tasks_seqstart doesnt exist in all svds so write its bit instead
r.tasks_seqstart[0].write(|w| unsafe { w.bits(1) });
} }
/// Sets the PWM clock prescaler. /// Sets the PWM clock prescaler.