Soft PWM broken in 0.14.0 - subtraction undeflow error

[grufkork]

Software PWM seems to no longer work in 0.14.0.

The following code panics when setting up a software PWM pin:

fn main() {
    env::set_var("RUST_BACKTRACE", "FULL");
    let mut g = Gpio::new().unwrap();

    let mut pin = g.get(25).unwrap().into_output_low();
    pin.set_pwm_frequency(100., 0.2).unwrap();
}

Error as follows:

E:\projects\etc\pibot>ssh pi@192.168.1.99 -i .\keys\id_rsa -t "sudo chmod u+rwx pibot;sudo ./pibot"
thread '<unnamed>' panicked at 'attempt to subtract with overflow', C:\Users\xxxx\.cargo\registry\src\github.com-1ecc6299db9ec823\rppal-0.14.0\src\gpio\soft_pwm.rs:97:24
stack backtrace:
   0: rust_begin_unwind
             at /rustc/a28f3c88e50a77bc2a91889241248c4543854e61/library/std/src/panicking.rs:575:5
   1: core::panicking::panic_fmt
             at /rustc/a28f3c88e50a77bc2a91889241248c4543854e61/library/core/src/panicking.rs:65:14
   2: core::panicking::panic
             at /rustc/a28f3c88e50a77bc2a91889241248c4543854e61/library/core/src/panicking.rs:114:5
   3: rppal::gpio::soft_pwm::SoftPwm::new::{{closure}}
             at C:\Users\xxxx\.cargo\registry\src\github.com-1ecc6299db9ec823\rppal-0.14.0\src\gpio\soft_pwm.rs:97:24
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
Connection to 192.168.1.99 closed.

I tried downgrading to 0.13.0 and it worked again.

[golemparts]

Thanks for reporting this issue. I'll have a look and see what's going on with this in 0.14.