embassy_buddy 0.0.3

A board support crate for the Prusa Buddy Board.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92

#![doc = include_str!("../../docs/filament_sensor.md")]
use core::convert::Infallible;

use defmt::Format;
use embassy_stm32::{
    exti::ExtiInput,
    gpio::Pull,
    peripherals::{EXTI4, PB4},
};
use embassy_sync::{
    blocking_mutex::raw::{RawMutex, ThreadModeRawMutex},
    mutex::{Mutex, TryLockError},
};
use embedded_hal::digital::InputPin;
use embedded_hal_async::digital::Wait;

pub type BuddyFilamentSensor<'a> = FilamentSensor<ThreadModeRawMutex, ExtiInput<'a>>;

pub(crate) fn build_filament_sensor<'a>(pin: PB4, ch: EXTI4) -> BuddyFilamentSensor<'a> {
    let exti = ExtiInput::new(pin, ch, Pull::None);
    FilamentSensor::new(exti)
}

#[derive(Debug, Format)]
pub enum FilamentChanged {
    Added,
    Removed,
}

pub struct FilamentSensor<M: RawMutex, T: InputPin<Error = Infallible> + Wait<Error = Infallible>> {
    exti: Mutex<M, T>,
}

impl<M: RawMutex, T: InputPin<Error = Infallible> + Wait<Error = Infallible>> FilamentSensor<M, T> {
    pub fn new(exti: T) -> Self {
        Self {
            exti: Mutex::new(exti),
        }
    }

    pub async fn available(&self) -> bool {
        let mut exti = self.exti.lock().await;
        exti.is_high().unwrap()
    }

    pub fn try_available(&self) -> Result<bool, TryLockError> {
        let mut exti = self.exti.try_lock()?;
        Ok(exti.is_high().unwrap())
    }

    pub async fn on_added(&self) {
        let mut exti = self.exti.lock().await;
        exti.wait_for_rising_edge().await.unwrap();
    }

    pub async fn try_on_added(&self) -> Result<(), TryLockError> {
        let mut exti = self.exti.try_lock()?;
        exti.wait_for_rising_edge().await.unwrap();
        Ok(())
    }

    pub async fn on_removed(self) {
        let mut exti = self.exti.lock().await;
        exti.wait_for_falling_edge().await.unwrap();
    }

    pub async fn try_on_removed(self) -> Result<(), TryLockError> {
        let mut exti = self.exti.try_lock()?;
        exti.wait_for_falling_edge().await.unwrap();
        Ok(())
    }

    pub async fn try_on_change(&self) -> Result<FilamentChanged, TryLockError> {
        let mut exti = self.exti.try_lock()?;
        exti.wait_for_any_edge().await.unwrap();
        if exti.is_high().unwrap() {
            Ok(FilamentChanged::Added)
        } else {
            Ok(FilamentChanged::Removed)
        }
    }

    pub async fn on_change(&self) -> FilamentChanged {
        let mut exti = self.exti.lock().await;
        exti.wait_for_any_edge().await.unwrap();
        if exti.is_high().unwrap() {
            FilamentChanged::Added
        } else {
            FilamentChanged::Removed
        }
    }
}