idle: implement an idle framework module

src/idle.rs

@@ -0,0 +1,37 @@
+use embassy_time::{Duration, Instant};
+
+#[derive(Debug)]
+pub struct IdleClock {
+    duration: Duration,
+    last_active: Instant,
+    fired: bool
+}
+
+impl IdleClock {
+    pub fn new(duration: Duration) -> Self {
+        Self {
+            last_active: Instant::now(),
+            duration,
+            fired: false
+        }
+    }
+
+    pub fn wake(&mut self) -> bool {
+        self.last_active = Instant::now();
+        if self.fired {
+            self.fired = false;
+            true
+        } else {
+            false
+        }
+    }
+
+    pub fn check(&mut self) -> bool {
+        if !self.fired && Instant::now().duration_since(self.last_active) >= self.duration {
+            self.fired = true;
+            true
+        } else {
+            false
+        }
+    }
+}