events: rewrite the eventing system to reduce mutex usage to just the measurement bus

src/graphics/oled_ui.rs

@@ -18,7 +18,7 @@ use nalgebra::Vector2;
 use micromath::F32Ext;
 use embedded_graphics::geometry::OriginDimensions;
 
-use crate::events::{SensorSource, SensorState};
+use crate::events::{Personality, SensorSource, SensorState};
 use crate::graphics::images;
 use crate::{ego::engine::MotionState, events::Scene};
 
@@ -26,12 +26,10 @@ use crate::{ego::engine::MotionState, events::Scene};
 pub struct OledUI {
     pub scene: Scene,
     pub motion: MotionState,
-    pub brakelight: bool,
-    pub headlight: bool,
+    pub personality: Personality,
     pub sensor_states: EnumMap<SensorSource, SensorState>,
     pub velocity: f32,
     pub location: Vector2<f64>,
-    pub sleep: bool,
 }
 
 #[derive(Default, Debug)]
@@ -179,12 +177,12 @@ impl Screen {
                 // The main UI content
                 Image::new(&images::BIKE, Point::new((128 / 2 - images::BIKE.size().width / 2) as i32, 24)).draw(sampler).unwrap();
 
-                let headlight_img = if state.ui.headlight {
+                let headlight_img = if state.ui.personality == Personality::Active {
                     &images::HEADLIGHT_ON
                 } else {
                     &images::HEADLIGHT_OFF
                 };
-                let brakelight_img = if state.ui.brakelight {
+                let brakelight_img = if state.ui.personality == Personality::Active {
                     &images::BRAKELIGHT_ON
                 } else {
                     &images::BRAKELIGHT_OFF