Cargo.lock

@@ -363,6 +363,7 @@ dependencies = [
  "embedded-hal-bus",
  "embedded-io 0.7.1",
  "embedded-storage",
+ "embedded-text",
  "esp-alloc",
  "esp-bootloader-esp-idf",
  "esp-hal",
@@ -1049,6 +1050,17 @@ dependencies = [
  "embedded-storage",
 ]
 
+[[package]]
+name = "embedded-text"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cf5c72c52db2f7dbe4a9c1ed81cd21301e8d66311b194fa41c04fb4f71843ba"
+dependencies = [
+ "az",
+ "embedded-graphics",
+ "object-chain",
+]
+
 [[package]]
 name = "enumset"
 version = "1.1.14"
@@ -2130,6 +2142,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "object-chain"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41af26158b0f5530f7b79955006c2727cd23d0d8e7c3109dc316db0a919784dd"
+
 [[package]]
 name = "once_cell"
 version = "1.21.4"

Cargo.toml

@@ -54,6 +54,7 @@ esp-storage = "0.9.0"
 embedded-storage = "0.3.1"
 binary_serde = "1.0.25"
 static_assertions = { version = "1.1.0", default-features = false }
+embedded-text = "0.7.3"
 
 [build-dependencies]
 log = "0.4.27"

src/navigation/navigation.rs

@@ -1,10 +1,15 @@
+use crate::alloc::string::ToString;
 use crate::card::model::Card;
 use crate::navigation::inputs::ButtonAction;
 use crate::navigation::inputs::Inputs;
 use crate::navigation::outputs::Outputs;
 use crate::navigation::state::NavigationState;
 use crate::peripherals::Peripherals;
+use crate::views::error_view::ErrorView;
 use crate::views::view::View;
+use alloc::boxed::Box;
+use alloc::string::String;
+use core::error;
 
 use embassy_futures::select::{Either, select};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
@@ -32,21 +37,45 @@ pub trait Navigable {
         &self,
         outputs: &mut Outputs,
         peripherals: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send;
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send;
     fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send;
 }
 
 #[embassy_executor::task]
 pub async fn run(mut inputs: Inputs, mut outputs: Outputs, peripherals: &'static Peripherals) {
+    async fn display_error(
+        error: String,
+        state: &mut NavigationState,
+        outputs: &mut Outputs,
+        peripherals: &Peripherals,
+    ) -> () {
+        let error_view = ErrorView {
+            error: error.to_string(),
+        };
+        state.screens.push(View::Error(error_view));
+        state
+            .screens
+            .last()
+            // Unwrap: we just pushed the state
+            .unwrap()
+            .display(outputs, peripherals)
+            .await
+            // Unwrap: display will panic on error in error view
+            .unwrap();
+    }
+
     log::info!("starting navigation");
 
     let mut state = NavigationState::new();
-    state
+    if let Err(error) = state
         .screens
         .last()
         .unwrap()
         .display(&mut outputs, peripherals)
-        .await;
+        .await
+    {
+        display_error(error.to_string(), &mut state, &mut outputs, &peripherals).await;
+    };
 
     loop {
         let selection = select(
@@ -92,12 +121,15 @@ pub async fn run(mut inputs: Inputs, mut outputs: Outputs, peripherals: &'static
         state.screens.push(new_state.view);
 
         if action != Action::Timer || new_state.redraw {
-            state
+            if let Err(error) = state
                 .screens
                 .last()
                 .unwrap()
                 .display(&mut outputs, peripherals)
-                .await;
+                .await
+            {
+                display_error(error.to_string(), &mut state, &mut outputs, &peripherals).await;
+            }
         }
 
         Timer::after(Duration::from_millis(DEBOUNCE_DURATION_MILLIS)).await;

src/peripherals/storage.rs

@@ -1,6 +1,6 @@
 pub struct MemoryRegion {
-    offset: u32,
-    size: usize,
+    pub offset: u32,
+    pub size: usize,
 }
 
 impl MemoryRegion {
@@ -15,13 +15,13 @@ impl MemoryRegion {
     }
 }
 
-const MAX_FLASH: usize = 16 * 1024 * 1024;
+pub const MAX_FLASH: usize = 16 * 1024 * 1024;
 
-const MAGIC_REGION: MemoryRegion = MemoryRegion::new(0, 4);
+pub const MAGIC_REGION: MemoryRegion = MemoryRegion::new(0, 4);
 
-const SETTINGS_REGION: MemoryRegion = MemoryRegion::new(MAGIC_REGION.end() as u32, 1024);
+pub const SETTINGS_REGION: MemoryRegion = MemoryRegion::new(MAGIC_REGION.end() as u32, 1024);
 
-const CARDSTORE_REGION: MemoryRegion = MemoryRegion::new(
+pub const CARDSTORE_REGION: MemoryRegion = MemoryRegion::new(
     SETTINGS_REGION.end() as u32,
     MAX_FLASH - SETTINGS_REGION.end(),
 );

src/peripherals/storage/cardstore.rs

@@ -1,5 +1,7 @@
 use alloc::collections::BTreeMap;
 use alloc::vec::Vec;
+use core::error::Error;
+use core::fmt::Display;
 
 use binary_serde::{BinarySerde, DeserializeError, Endianness};
 
@@ -67,7 +69,19 @@ impl AllocationTableEntry {
 pub enum CardStoreError {
     Store(FlashStoreError),
     CorruptedEntry(DeserializeError),
-    NoEntry,
+    NoEntry(u32),
+}
+
+impl Error for CardStoreError {}
+
+impl Display for CardStoreError {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        match self {
+            CardStoreError::Store(e) => e.fmt(f),
+            CardStoreError::CorruptedEntry(e) => e.fmt(f),
+            CardStoreError::NoEntry(uuid) => write!(f, "No Card Entry\nuuid: 0x{uuid:x}"),
+        }
+    }
 }
 
 impl From<FlashStoreError> for CardStoreError {
@@ -129,7 +143,7 @@ impl CardStore {
         let entry = self
             .allocation_table
             .get(&uuid)
-            .ok_or(CardStoreError::NoEntry)?;
+            .ok_or(CardStoreError::NoEntry(uuid))?;
 
         let mut raw_card: [u8; size_of::<RawCard>()] = [0; size_of::<RawCard>()];
         self.store.read(entry.offset, &mut raw_card).await?;

src/peripherals/storage/flash_store.rs

@@ -1,3 +1,6 @@
+use core::error::Error;
+use core::fmt::Display;
+
 use crate::navigation::navigation::Mutex;
 use embedded_storage::nor_flash::NorFlash;
 use embedded_storage::nor_flash::ReadNorFlash;
@@ -5,7 +8,23 @@ use esp_storage::{FlashStorage, FlashStorageError};
 
 use crate::peripherals::storage::MAGIC_REGION;
 
-pub type FlashStoreError = FlashStorageError;
+#[derive(Debug)]
+pub struct FlashStoreError(FlashStorageError);
+
+impl From<FlashStorageError> for FlashStoreError {
+    fn from(value: FlashStorageError) -> Self {
+        Self(value)
+    }
+}
+
+impl Error for FlashStoreError {}
+
+impl Display for FlashStoreError {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        use core::fmt::Debug;
+        self.0.fmt(f)
+    }
+}
 
 const FLASH_ADDR: u32 = 0x9000;
 
@@ -37,12 +56,17 @@ impl FlashStore {
     }
 
     pub async fn read(&self, offset: u32, bytes: &mut [u8]) -> Result<(), FlashStoreError> {
-        self.storage.lock().await.read(FLASH_ADDR + offset, bytes)
+        self.storage.lock().await.read(FLASH_ADDR + offset, bytes)?;
+        Ok(())
     }
 
     pub async fn write(&self, offset: u32, bytes: &mut [u8]) -> Result<(), FlashStoreError> {
         log::debug!("Writing {} bytes at offset 0x{offset:08x}", bytes.len());
-        self.storage.lock().await.write(FLASH_ADDR + offset, bytes)
+        self.storage
+            .lock()
+            .await
+            .write(FLASH_ADDR + offset, bytes)?;
+        Ok(())
     }
 
     pub async fn write_erase(&self, offset: u32, bytes: &mut [u8]) -> Result<(), FlashStoreError> {
@@ -52,7 +76,8 @@ impl FlashStore {
         );
         let mut lock = self.storage.lock().await;
         lock.erase(FLASH_ADDR + offset, FLASH_ADDR + bytes.len() as u32)?;
-        lock.write(FLASH_ADDR + offset, bytes)
+        lock.write(FLASH_ADDR + offset, bytes)?;
+        Ok(())
     }
 
     pub fn has_magic_bytes(storage: &mut FlashStorage) -> Result<bool, FlashStoreError> {
@@ -75,7 +100,9 @@ impl FlashStore {
         if Self::has_magic_bytes(storage)? {
             Ok(())
         } else {
-            Err(FlashStoreError::Other(FLASH_INITIALIZE_MAGIC as i32))
+            Err(FlashStoreError(FlashStorageError::Other(
+                FLASH_INITIALIZE_MAGIC as i32,
+            )))
         }
     }
 }

src/views.rs

@@ -1,4 +1,5 @@
 pub mod card_view;
+pub mod error_view;
 pub mod flash_info_view;
 pub mod journal_view;
 pub mod main_menu;

src/views/card_view.rs

@@ -2,7 +2,9 @@ use crate::display::sprite::render_sprite_onto_ili9341;
 use crate::navigation::navigation::NewState;
 use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
+use alloc::boxed::Box;
 use alloc::format;
+use core::error;
 use embedded_graphics::mono_font::MonoTextStyle;
 use embedded_graphics::mono_font::ascii::FONT_6X10;
 use embedded_graphics::pixelcolor::Rgb565;
@@ -30,7 +32,7 @@ impl Navigable for CardView {
         &self,
         outputs: &mut Outputs,
         _: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send {
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
         async move {
             let display = &mut outputs.primary_display;
             display.clear(Rgb565::BLACK).unwrap();
@@ -100,6 +102,7 @@ impl Navigable for CardView {
 
             let palette: Palette = self.card.cardtype.clone().into();
             render_sprite_onto_ili9341(display, self.card.sprite.data.as_slice(), &palette);
+            Ok(())
         }
     }
 

src/views/error_view.rs

@@ -0,0 +1,94 @@
+use crate::navigation::navigation::Action;
+use crate::navigation::navigation::Navigable;
+use crate::navigation::navigation::NewState;
+use crate::navigation::outputs::Outputs;
+use crate::peripherals::Peripherals;
+use crate::views::view::View;
+use alloc::boxed::Box;
+use alloc::format;
+use alloc::string::String;
+use core::error;
+use embedded_graphics::{
+    Drawable,
+    mono_font::{MonoTextStyle, ascii::FONT_10X20},
+    pixelcolor::Rgb565,
+    prelude::*,
+    primitives::Rectangle,
+    text::Text,
+};
+
+use embedded_text::{
+    TextBox,
+    alignment::HorizontalAlignment,
+    style::{HeightMode, TextBoxStyleBuilder},
+};
+#[derive(Debug, Clone)]
+pub struct ErrorView {
+    pub error: String,
+}
+
+impl Navigable for ErrorView {
+    fn display(
+        &self,
+        outputs: &mut Outputs,
+        _: &Peripherals,
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
+        async move {
+            let style = MonoTextStyle::new(&FONT_10X20, Rgb565::RED);
+            let display_area = outputs.primary_display.bounding_box();
+            Text::new(
+                "Error",
+                Point::new((display_area.size.width / 2 - 25) as i32, 30),
+                style,
+            )
+            .draw(&mut outputs.primary_display)
+            .unwrap_or_else(|error| {
+                panic!(
+                    "Error: {error:?}\nDraw error while rendering error: {}",
+                    self.error
+                )
+            });
+
+            let style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
+            let textbox_style = TextBoxStyleBuilder::new()
+                .height_mode(HeightMode::FitToText)
+                .alignment(HorizontalAlignment::Center)
+                .build();
+
+            let bounds = Rectangle::new(Point::new(0, 30), display_area.size);
+
+            TextBox::with_textbox_style(&format!("{}", self.error), bounds, style, textbox_style)
+                .draw(&mut outputs.primary_display)
+                .unwrap_or_else(|error| {
+                    panic!(
+                        "Error: {error:?}\nDraw error while rendering error: {}",
+                        self.error
+                    )
+                });
+            Ok(())
+        }
+    }
+
+    fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send {
+        async move {
+            let Action::Button(input) = input else {
+                // Skip timer inputs
+                return NewState {
+                    view: View::Error(self.clone()),
+                    replace_view: true,
+                    redraw: false,
+                };
+            };
+
+            let new_menu = match input {
+                _ => View::Error(self.clone()),
+            };
+
+            NewState {
+                replace_view: matches!(new_menu, View::FlashInfo(_)),
+                view: new_menu,
+                redraw: true,
+            }
+        }
+    }
+}

src/views/flash_info_view.rs

@@ -1,10 +1,12 @@
-use crate::navigation::inputs::ButtonAction;
 use crate::navigation::navigation::Action;
 use crate::navigation::navigation::Navigable;
 use crate::navigation::navigation::NewState;
 use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
+use crate::peripherals::storage::MAGIC_REGION;
 use crate::views::view::View;
+use alloc::boxed::Box;
+use core::error;
 use embedded_graphics::mono_font::MonoTextStyle;
 use embedded_graphics::mono_font::ascii::FONT_10X20;
 use embedded_graphics::pixelcolor::Rgb565;
@@ -22,11 +24,20 @@ impl Navigable for FlashInfoView {
         &self,
         outputs: &mut Outputs,
         peripherals: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send {
-        let style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
-        Text::new("Flash Initialized: {:?}", Point::new(40, 40), style);
-
-        core::future::ready(())
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
+        async move {
+            let style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
+            let mut magic_bytes: [u8; MAGIC_REGION.size] = [0; MAGIC_REGION.size];
+            peripherals
+                .store
+                .lock()
+                .await
+                .flash_store
+                .read(MAGIC_REGION.offset, &mut magic_bytes)
+                .await?;
+            Text::new("Flash Initialized: {:?}", Point::new(40, 40), style);
+            Ok(())
+        }
     }
 
     fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send {

src/views/journal_view.rs

@@ -1,3 +1,5 @@
+use alloc::boxed::Box;
+use core::error;
 use crate::peripherals::Peripherals;
 use core::future;
 
@@ -27,9 +29,10 @@ impl Navigable for JournalView {
         &self,
         outputs: &mut Outputs,
         _: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send {
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
         async move {
             outputs.primary_display.clear(Rgb565::BLACK).unwrap();
+            Ok(())
         }
     }
 

src/views/main_menu.rs

@@ -1,5 +1,7 @@
 use crate::peripherals::Peripherals;
+use alloc::boxed::Box;
 use alloc::vec;
+use core::error;
 
 use crate::card::model::Card;
 use crate::card::{decoder::split_nfc_hex, mock::*};
@@ -15,6 +17,7 @@ use embedded_graphics::pixelcolor::Rgb565;
 use embedded_graphics::prelude::RgbColor;
 use embedded_graphics_core::draw_target::DrawTarget;
 
+use crate::peripherals::storage::cardstore::CardStoreError;
 pub const MAX_SELECTED: i32 = 4;
 
 #[derive(Debug, Clone)]
@@ -26,17 +29,19 @@ impl Navigable for MainMenu {
     fn display(
         &self,
         outputs: &mut Outputs,
-        _: &Peripherals
-    ) -> impl core::future::Future<Output = ()> + Send {
-        let display = &mut outputs.primary_display;
-        display.clear(Rgb565::BLACK).unwrap();
+        _: &Peripherals,
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
+        async move {
+            let display = &mut outputs.primary_display;
+            display.clear(Rgb565::BLACK).unwrap();
 
-        menu_item::show(display, "Scan card", 0, self.selected);
-        menu_item::show(display, "Last card", 1, self.selected);
-        menu_item::show(display, "Journal", 2, self.selected);
-        menu_item::show(display, "Settings", 3, self.selected);
+            menu_item::show(display, "Scan card", 0, self.selected);
+            menu_item::show(display, "Last card", 1, self.selected);
+            menu_item::show(display, "Journal", 2, self.selected);
+            menu_item::show(display, "Settings", 3, self.selected);
 
-        core::future::ready(())
+            Ok(())
+        }
     }
 
     fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send {

src/views/menu_item.rs

@@ -1,3 +1,5 @@
+use alloc::boxed::Box;
+use core::error;
 use crate::peripherals::Peripherals;
 use embedded_graphics::Drawable;
 use embedded_graphics::draw_target::DrawTarget;

src/views/scan_menu.rs

@@ -3,6 +3,8 @@ use crate::navigation::navigation::CARD_DATA;
 use crate::navigation::navigation::NewState;
 use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
+use alloc::boxed::Box;
+use core::error;
 
 use alloc::format;
 use embedded_graphics::Drawable;
@@ -37,55 +39,56 @@ impl Navigable for ScanMenu {
     fn display(
         &self,
         outputs: &mut Outputs,
-        _: &Peripherals
-    ) -> impl core::future::Future<Output = ()> + Send {
-        let display = &mut outputs.primary_display;
-        let style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
-        display.clear(Rgb565::BLACK).unwrap();
+        _: &Peripherals,
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
+        async move {
+            let display = &mut outputs.primary_display;
+            let style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
+            display.clear(Rgb565::BLACK).unwrap();
 
-        let display_area = display.bounding_box();
+            let display_area = display.bounding_box();
 
-        Text::new("Scanning...", Point::new(20, 30), style)
+            Text::new("Scanning...", Point::new(20, 30), style)
+                .draw(display)
+                .unwrap();
+
+            // Create styles used by the drawing operations.
+            let arc_stroke = PrimitiveStyleBuilder::new()
+                .stroke_color(Rgb565::WHITE)
+                .stroke_width(5)
+                .stroke_alignment(StrokeAlignment::Inside)
+                .build();
+            let character_style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
+            let text_style = TextStyleBuilder::new()
+                .baseline(Baseline::Middle)
+                .alignment(Alignment::Center)
+                .build();
+
+            let sweep = self.progress as f32 * 360.0 / 255.0;
+
+            let width = display_area.size.width;
+            let bounding_box =
+                Rectangle::with_center(display_area.center(), Size::new_equal(4 * width / 5));
+            // log::info!("bounding_box: {:?}", bounding_box);
+            // log::info!("display_area: {:?}", display_area);
+            // Draw an arc with a 5px wide stroke.
+            Arc::new(
+                bounding_box.top_left,
+                bounding_box.size.width,
+                90.0.deg(),
+                sweep.deg(),
+            )
+            .into_styled(arc_stroke)
             .draw(display)
             .unwrap();
 
-        // Create styles used by the drawing operations.
-        let arc_stroke = PrimitiveStyleBuilder::new()
-            .stroke_color(Rgb565::WHITE)
-            .stroke_width(5)
-            .stroke_alignment(StrokeAlignment::Inside)
-            .build();
-        let character_style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
-        let text_style = TextStyleBuilder::new()
-            .baseline(Baseline::Middle)
-            .alignment(Alignment::Center)
-            .build();
-
-        let sweep = self.progress as f32 * 360.0 / 255.0;
-
-        let width = display_area.size.width;
-        let bounding_box =
-            Rectangle::with_center(display_area.center(), Size::new_equal(4 * width / 5));
-        // log::info!("bounding_box: {:?}", bounding_box);
-        // log::info!("display_area: {:?}", display_area);
-        // Draw an arc with a 5px wide stroke.
-        Arc::new(
-            bounding_box.top_left,
-            bounding_box.size.width,
-            90.0.deg(),
-            sweep.deg(),
-        )
-        .into_styled(arc_stroke)
-        .draw(display)
-        .unwrap();
-
-        // Draw centered text.
-        let text = format!("{:.2}%", 100. * (self.progress as f32) / 255.);
-        Text::with_text_style(&text, display_area.center(), character_style, text_style)
-            .draw(display)
-            .unwrap();
-
-        core::future::ready(())
+            // Draw centered text.
+            let text = format!("{:.2}%", 100. * (self.progress as f32) / 255.);
+            Text::with_text_style(&text, display_area.center(), character_style, text_style)
+                .draw(display)
+                .unwrap();
+            Ok(())
+        }
     }
 
     fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send {

src/views/settings_menu.rs

@@ -2,6 +2,8 @@ use crate::navigation::navigation::{Action, Navigable, NewState};
 use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
 use crate::views::{flash_info_view::FlashInfoView, menu_item, view::View};
+use alloc::boxed::Box;
+use core::error;
 
 use crate::navigation::inputs::ButtonAction;
 
@@ -20,15 +22,16 @@ impl Navigable for SettingsMenu {
     fn display(
         &self,
         outputs: &mut Outputs,
-        _: &Peripherals
-    ) -> impl core::future::Future<Output = ()> + Send {
-        let display = &mut outputs.primary_display;
-        display.clear(Rgb565::BLACK).unwrap();
-        menu_item::show(display, "System Inforation", 0, self.selected);
-        menu_item::show(display, "Wifi Information", 1, self.selected);
-        menu_item::show(display, "Flash Information", 2, self.selected);
-
-        core::future::ready(())
+        _: &Peripherals,
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
+        async move {
+            let display = &mut outputs.primary_display;
+            display.clear(Rgb565::BLACK).unwrap();
+            menu_item::show(display, "System Inforation", 0, self.selected);
+            menu_item::show(display, "Wifi Information", 1, self.selected);
+            menu_item::show(display, "Flash Information", 2, self.selected);
+            Ok(())
+        }
     }
 
     fn handle_input(&self, input: Action) -> impl core::future::Future<Output = NewState> + Send {

src/views/status_bar.rs

@@ -1 +1,3 @@
+use alloc::boxed::Box;
+use core::error;
 // Status bar view module

src/views/view.rs

@@ -2,14 +2,17 @@ use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
 use crate::views::card_view::CardView;
 use crate::views::{
-    flash_info_view::FlashInfoView, journal_view::JournalView, main_menu::MainMenu,
-    scan_menu::ScanMenu, settings_menu::SettingsMenu,
+    error_view::ErrorView, flash_info_view::FlashInfoView, journal_view::JournalView,
+    main_menu::MainMenu, scan_menu::ScanMenu, settings_menu::SettingsMenu,
 };
+use alloc::boxed::Box;
+use core::error;
 
 use crate::navigation::navigation::{Navigable, NewState};
 
 #[derive(Debug, Clone)]
 pub enum View {
+    Error(ErrorView),
     Main(MainMenu),
     Scan(ScanMenu),
     Settings(SettingsMenu),
@@ -22,10 +25,11 @@ impl Navigable for View {
     fn display(
         &self,
         outputs: &mut Outputs,
-        peripherals: &Peripherals
-    ) -> impl core::future::Future<Output = ()> + Send {
+        peripherals: &Peripherals,
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
         async move {
             match self {
+                View::Error(error_view) => error_view.display(outputs, peripherals).await,
                 View::Main(main_menu) => main_menu.display(outputs, peripherals).await,
                 View::Scan(scan_menu) => scan_menu.display(outputs, peripherals).await,
                 View::Settings(settings_menu) => settings_menu.display(outputs, peripherals).await,
@@ -44,6 +48,7 @@ impl Navigable for View {
     ) -> impl core::future::Future<Output = NewState> + Send {
         async move {
             match self {
+                View::Error(error_view) => error_view.handle_input(input).await,
                 View::Main(main_menu) => main_menu.handle_input(input).await,
                 View::Scan(scan_menu) => scan_menu.handle_input(input).await,
                 View::Settings(settings_menu) => settings_menu.handle_input(input).await,