tildagon 0.0.1

Board support crate for the Electromagnetic Field Tildagon badge
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use super::{InputPin, LedPin, OutputPin, aw9523b::Port};
use defmt::Format;

pub(crate) trait PinExt {
    fn address(&self) -> u8;
    fn port(&self) -> Port;
    fn pin(&self) -> u8;
    fn bit(&self) -> u8;
}

fn pin_bits(pin: u8) -> u8 {
    match pin {
        0 => 0b00000001,
        1 => 0b00000010,
        2 => 0b00000100,
        3 => 0b00001000,
        4 => 0b00010000,
        5 => 0b00100000,
        6 => 0b01000000,
        7 => 0b10000000,
        _ => unreachable!(),
    }
}

pub(crate) struct TypeErasedPin {
    address: u8,
    port: Port,
    pin: u8,
}

impl PinExt for TypeErasedPin {
    fn address(&self) -> u8 {
        self.address
    }

    fn port(&self) -> Port {
        self.port
    }

    fn pin(&self) -> u8 {
        self.pin
    }

    fn bit(&self) -> u8 {
        pin_bits(self.pin)
    }
}

impl<const ADDRESS: u8, const PORT: Port, const PIN: u8> From<Pin<ADDRESS, PORT, PIN>>
    for TypeErasedPin
{
    fn from(_: Pin<ADDRESS, PORT, PIN>) -> Self {
        Self {
            address: ADDRESS,
            port: PORT,
            pin: PIN,
        }
    }
}

#[derive(Format, Debug, PartialEq, Eq)]
pub struct Pin<const ADDRESS: u8, const PORT: Port, const PIN: u8> {}

impl<const ADDRESS: u8, const PORT: Port, const PIN: u8> Pin<ADDRESS, PORT, PIN> {
    pub(super) fn new() -> Self {
        Self {}
    }

    pub fn into_output<I2C, E>(self, bus: I2C) -> Result<OutputPin<I2C>, E>
    where
        I2C: embedded_hal::i2c::I2c<Error = E>,
    {
        OutputPin::try_new(bus, self.into())
    }

    pub fn into_input<I2C, E>(self, bus: I2C) -> Result<InputPin<I2C>, E>
    where
        I2C: embedded_hal::i2c::I2c<Error = E>,
    {
        InputPin::try_new(bus, self.into())
    }

    pub fn into_led<I2C, E>(self, bus: I2C) -> Result<LedPin<I2C>, E>
    where
        I2C: embedded_hal::i2c::I2c<Error = E>,
    {
        LedPin::try_new(bus, self.into())
    }
}

impl<const ADDRESS: u8, const PORT: Port, const PIN: u8> PinExt for Pin<ADDRESS, PORT, PIN> {
    fn address(&self) -> u8 {
        ADDRESS
    }

    fn port(&self) -> Port {
        PORT
    }

    fn pin(&self) -> u8 {
        PIN
    }

    fn bit(&self) -> u8 {
        pin_bits(PIN)
    }
}