Register button presses

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+rppal = "0.11.3"

src/main.rs

@@ -1,3 +1,26 @@
+use std::thread::sleep;
+use std::time::Duration;
+
+use rppal::gpio::{Gpio, Trigger};
+
+const BUTTON_PIN: u8 = 26;
+
 fn main() {
-    println!("Hello, world!");
+  let gpio = Gpio::new().expect("gpio init");
+  let mut pin = gpio.get(BUTTON_PIN).expect("pin init").into_input_pulldown();
+
+  pin.set_interrupt(Trigger::RisingEdge).expect("set interrupt");
+
+  let mut count = 0;
+  loop {
+    match pin.poll_interrupt(true, Some(Duration::from_secs(5))) {
+      Ok(Some(_)) => {
+        count += 1;
+        println!("pushed: {}", count);
+        sleep(Duration::from_millis(25));
+      },
+      Ok(None) => println!("time"),
+      err => { err.expect("poll"); }
+    }
+  }
 }