owa4x 0.4.15

Idiomatic wrapper around the owa4x-sys crate
Documentation 
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use crate::OwaError;
use num_enum::{IntoPrimitive, TryFromPrimitive};
use std::convert::TryFrom;

#[cfg(target_arch = "arm")]
use owa4x_sys as owa;
#[cfg(all(target_arch = "aarch64", not(target_os = "macos")))]
use owa5x_sys as owa;
#[cfg(any(target_arch = "x86_64", all(target_arch = "aarch64", target_os = "macos")))]
use crate::sys_stub as owa;

#[derive(Debug, Eq, PartialEq, IntoPrimitive, TryFromPrimitive)]
#[repr(u8)]
pub enum BatteryChargeState {
    Precharge = 0,
    ChargeDone = 1,
    FastCharging = 2,
    ChargeSuspended = 3,
}

#[derive(Debug, Eq, PartialEq, IntoPrimitive, TryFromPrimitive)]
#[repr(u32)]
pub enum WakeupReason {
    // this isn't documented, but it seems that when i turn power on i get 0 for the reason
    PowerSwitch = 0,
    Moving = 1,
    PowerFail = 2,
    Console = 4,
    Gsm = 8,
    Can1 = 16,
    Rtc = 64,
    DigitalIn0 = 128,
    DigitalIn1 = 256,
    DigitalIn2 = 512,
    DigitalIn3 = 1024,
    DigitalIn4 = 2048,
    DigitalIn5 = 4096,
    DigitalIn6 = 8192,
    DigitalIn7 = 16384,
    DigitalIn8 = 32768,
    DigitalIn9 = 65536,
}

#[derive(Debug, Eq, PartialEq)]
pub enum PowerSource {
    External,
    Battery,
}

#[derive(Debug, Copy, Clone)]
pub struct Power {
}

impl Power {
    pub fn get_power_source(&self) -> Result<PowerSource, OwaError> {
        let mut v: u8 = 255;
        let r: u32;
        unsafe {
            r = owa::DIGIO_Get_PWR_FAIL(&mut v) as u32;
        }
        if r!= owa::NO_ERROR {
            return Err(OwaError::from_or_unknown(r));
        }
        match v {
            0 => Ok(PowerSource::External),
            1 => Ok(PowerSource::Battery),
            _ => Err(OwaError::UnknownError)
        }
    }

    /// Immediately enters sleep mode.  Instructs the system to allow wakeup any source.
    pub fn enter_sleep(&self) -> Result<(), OwaError> {
        unsafe {
            let r = owa::RTUEnterStop((owa::RTU_WKUP_PWRFAIL | owa::RTU_WKUP_RTC).into(), 0) as u32;
            if r != owa::NO_ERROR {
                return Err(OwaError::try_from(r).unwrap_or(OwaError::UnknownError));
            }
        }
        Ok(())
    }

    pub fn get_battery_voltage(&self) -> Result<f32, OwaError> {
        let mut v: f32 = 0.0;
        let res: u32;
        unsafe {
            res = owa::RTUGetAD_VBAT_MAIN(&mut v) as u32;
        }
        if res != owa::NO_ERROR {
            return Err(OwaError::try_from(res).unwrap_or(OwaError::UnknownError));
        }
        Ok(v)
    }


    pub fn get_power_voltage(&self) -> Result<f32, OwaError> {
        let mut v: f32 = 0.0;
        let res: u32;
        unsafe {
            res = owa::RTUGetAD_V_IN(&mut v) as u32;
        }
        if res != owa::NO_ERROR {
            return Err(OwaError::try_from(res).unwrap_or(OwaError::UnknownError));
        }
        Ok(v)
    }

    pub fn get_battery_state(&self) -> Result<BatteryChargeState, OwaError> {
        let mut s: u8 = 0;
        let res: u32;
        unsafe {
            res = owa::RTUGetBatteryState(&mut s) as u32;
        }
        if res != owa::NO_ERROR {
            return Err(OwaError::try_from(res).unwrap_or(OwaError::UnknownError));
        }
        let r = BatteryChargeState::try_from(s);
        match r {
            Ok(e) => Ok(e),
            Err(_) => Err(OwaError::ParseError),
        }
    }

    pub fn get_wakeup_reason(&self) -> Result<WakeupReason, OwaError> {
        todo!("wakeup reason");
        /*
        let mut reason: u64 = 0;
        let res: u32;
        unsafe {
            res = owa::RTUGetWakeUpReason(&mut reason) as u32;
        }
        if res != owa::NO_ERROR {
            return Err(OwaError::try_from(res).unwrap_or(OwaError::UnknownError));
        }
        let r = WakeupReason::try_from(reason);
        match r {
            Ok(e) => Ok(e),
            Err(_) => Err(OwaError::ParseError),
        }
        */
    }
}