emc230x 0.7.0

An async driver for the EMC230x family of fan controllers
Documentation 
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// Copyright (c) 2024 Jake Swensen
// SPDX-License-Identifier: MPL-2.0
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

use super::RegisterOffset;
use crate::hacky_round;
use emc230x_macros::RegisterOffset;

#[derive(Copy, Clone, Debug, RegisterOffset)]
#[register(offset = 0x00, default = 0x00)]
pub struct FanDriveSetting(u8);

impl FanDriveSetting {
    pub fn duty_cycle(&self) -> u8 {
        let duty = (self.0 as f64 / 255.0) * 100.0;
        hacky_round(duty)
    }

    pub fn from_duty_cycle(duty: u8) -> Self {
        let raw = (duty as f64 / 100.0) * 255.0;
        let raw = hacky_round(raw);
        FanDriveSetting(raw)
    }
}

#[cfg(test)]
mod tests {
    use super::FanDriveSetting;

    #[test]
    fn fan_duty_cycle() {
        let expected_duty = 75_u8;
        let expected_raw = 191_u8;
        let test_value = FanDriveSetting::from_duty_cycle(expected_duty);
        assert_eq!(expected_duty, test_value.duty_cycle());
        assert_eq!(expected_raw, test_value.0);
    }
}