Function pamoja_duty_cycle_from_fraction 

#[unsafe(no_mangle)]
pub extern "C" fn pamoja_duty_cycle_from_fraction(
    period_us: u64,
    fraction: f32,
) -> PamojaDutyCycle

Creates a duty cycle that spends a fraction of each period awake.

Arguments

• period_us - the whole period, in microseconds.
• fraction - the share of the period spent awake, clamped to 0.0 through 1.0.

Returns

The duty cycle.