ws_oled_driver/
button.rs

1use anyhow::Result;
2use rppal::gpio::Gpio;
3use rppal::gpio::InputPin;
4use rppal::gpio::Level;
5
6const KEY1_PIN: u8 = 21;
7const KEY2_PIN: u8 = 20;
8const KEY3_PIN: u8 = 16;
9
10#[derive(Debug)]
11pub enum State {
12    Key1,
13    Key2,
14    Key3,
15}
16
17pub struct ButtonController {
18    pin1: InputPin,
19    pin2: InputPin,
20    pin3: InputPin
21}
22
23impl ButtonController {
24    pub fn new() -> Result<Self> {
25        let gpio = Gpio::new()?;
26        let pin1 = gpio.get(KEY1_PIN)?.into_input_pullup();
27        let pin2 = gpio.get(KEY2_PIN)?.into_input_pullup();
28        let pin3 = gpio.get(KEY3_PIN)?.into_input_pullup();
29
30        Ok(Self { pin1, pin2, pin3 })
31    }
32
33    pub fn read(&self) -> Option<State> {
34        if self.pin1.read() == Level::Low { return Some(State::Key1); }
35        if self.pin2.read() == Level::Low { return Some(State::Key2); }
36        if self.pin3.read() == Level::Low { return Some(State::Key3); }
37
38        None
39    }
40}
ws_oled_driver/button.rs

ws_oled_driver/
button.rs
