working on main menu

src/navigation/main_menu.rs

@@ -1,3 +1,11 @@
 use crate::navigation::inputs::Inputs;
 
-pub async fn show(_inputs: &mut Inputs) {}
+pub const MAX_SELECTED: i8 = 3;
+
+pub struct MainMenu {
+    pub selected: i8,
+}
+
+impl MainMenu {
+    pub async fn display(self: &Self) {}
+}

src/navigation/navigation.rs

@@ -1,8 +1,35 @@
 use crate::navigation::inputs::Inputs;
+use crate::navigation::main_menu::{MAX_SELECTED, MainMenu};
+
+use embassy_futures::select::Either6;
+use embassy_futures::select::select6;
 
 #[embassy_executor::task]
 pub async fn run(mut inputs: Inputs) {
+    let mut state = MainMenu { selected: 0 };
+
     loop {
-        crate::navigation::main_menu::show(&mut inputs).await
+        let selection = select6(
+            inputs.up.wait_for_low(),
+            inputs.down.wait_for_low(),
+            inputs.left.wait_for_low(),
+            inputs.right.wait_for_low(),
+            inputs.ok.wait_for_low(),
+            inputs.back.wait_for_low(),
+        )
+        .await;
+
+        let value = match selection {
+            Either6::First(_) => (state.selected.wrapping_sub(1)) % MAX_SELECTED,
+            Either6::Second(_) => (state.selected.wrapping_add(1)) % MAX_SELECTED,
+            _ => continue, // Either6::Third(_) => ,
+                           // Either6::Fourth(_) => (),
+                           // Either6::Fifth(_) => (),
+                           // Either6::Sixth(_) => (),
+        };
+
+        state.selected = value;
+
+        state.display().await
     }
 }