+struct Timer {
+ state: u32,
+ delay_ms: u32,
+ last_update_ticks: u32,
+}
+
+impl Timer {
+ pub fn new(delay_ms: u32) -> Timer {
+ Timer {
+ state: 0,
+ delay_ms: delay_ms,
+ last_update_ticks: systick::now(),
+ }
+ }
+
+ pub fn update<F>(&mut self, func: F)
+ where F: FnOnce(u32) -> u32
+ {
+ if systick::has_timeout_ms(self.last_update_ticks, self.delay_ms) {
+ self.state = func(self.state);
+
+ self.last_update_ticks = systick::now();
+ }
+ }
+}
+