works

Cargo.lock

@@ -18,8 +18,6 @@ version = "0.1.0"
 dependencies = [
  "abi_sys",
  "embedded-graphics",
- "embedded-sdmmc",
- "main_proc_macro",
  "once_cell",
  "rand_core 0.9.3",
 ]
@@ -32,7 +30,6 @@ dependencies = [
  "cbindgen",
  "defmt 0.3.100",
  "embedded-graphics",
- "embedded-sdmmc",
  "strum",
 ]
 
@@ -351,7 +348,7 @@ checksum = "e37549a379a9e0e6e576fd208ee60394ccb8be963889eebba3ffe0980364f472"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -448,7 +445,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim 0.11.1",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -459,7 +456,7 @@ checksum = "fc34b93ccb385b40dc71c6fceac4b2ad23662c7eeb248cf10d529b7e055b6ead"
 dependencies = [
  "darling_core",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -497,7 +494,7 @@ dependencies = [
  "proc-macro-error2",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -646,7 +643,7 @@ dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -1020,7 +1017,7 @@ checksum = "4f6e621fe4c7e05b695274b722dc0a60bacd1c8696b58191baa0154713d52400"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -1213,7 +1210,7 @@ checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -1290,6 +1287,7 @@ version = "0.1.0"
 dependencies = [
  "abi",
  "embedded-graphics",
+ "selection_ui",
  "tinygif",
 ]
 
@@ -1649,14 +1647,6 @@ version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
-[[package]]
-name = "main_proc_macro"
-version = "0.1.0"
-dependencies = [
- "quote",
- "syn 2.0.108",
-]
-
 [[package]]
 name = "memchr"
 version = "2.7.5"
@@ -1737,7 +1727,7 @@ checksum = "77e878c846a8abae00dd069496dbe8751b16ac1c3d6bd2a7283a938e8228f90d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -1929,7 +1919,7 @@ dependencies = [
  "proc-macro-error2",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -1996,7 +1986,7 @@ dependencies = [
  "proc-macro-error-attr2",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -2010,9 +2000,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.41"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce25767e7b499d1b604768e7cde645d14cc8584231ea6b295e9c9eb22c02e1d1"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
@@ -2200,6 +2190,16 @@ version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1257cd4248b4132760d6524d6dda4e053bc648c9070b960929bf50cfb1e7add"
 
+[[package]]
+name = "selection_ui"
+version = "0.1.0"
+dependencies = [
+ "abi",
+ "embedded-graphics",
+ "embedded-layout",
+ "embedded-text",
+]
+
 [[package]]
 name = "semver"
 version = "0.9.0"
@@ -2242,7 +2242,7 @@ checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -2409,7 +2409,7 @@ dependencies = [
  "heck 0.5.0",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -2438,9 +2438,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.108"
+version = "2.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da58917d35242480a05c2897064da0a80589a2a0476c9a3f2fdc83b53502e917"
+checksum = "17b6f705963418cdb9927482fa304bc562ece2fdd4f616084c50b7023b435a40"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2537,7 +2537,7 @@ checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -2548,7 +2548,7 @@ checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]
 
 [[package]]
@@ -2616,7 +2616,7 @@ dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
  "uuid",
 ]
 
@@ -2775,7 +2775,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
  "wasm-bindgen-shared",
 ]
 
@@ -2797,7 +2797,7 @@ checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -2947,5 +2947,5 @@ checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.108",
+ "syn 2.0.104",
 ]

Cargo.toml

@@ -4,11 +4,11 @@ members = [
   "kernel",
   "abi_sys",
   "abi",
+  "selection_ui",
   "user-apps/calculator",
   "user-apps/snake",
   "user-apps/gallery",
   "user-apps/gif",
-  "main_proc_macro",
 ]
 
 [profile.release]
@@ -27,4 +27,4 @@ panic = "abort"
 
 [profile.dev]
 lto = true
-opt-level = "z"
+opt-level = "s"

abi/Cargo.toml

@@ -5,8 +5,6 @@ edition = "2024"
 
 [dependencies]
 abi_sys = { path = "../abi_sys" }
-main_proc_macro = { path = "../main_proc_macro" }
-embedded-sdmmc = { version = "0.9", default-features = false }
 embedded-graphics = "0.8.1"
 once_cell = { version = "1", default-features = false }
 rand_core = "0.9.3"

abi/src/lib.rs

@@ -5,20 +5,10 @@ extern crate alloc;
 
 pub use abi_sys::{self, keyboard};
 use abi_sys::{RngRequest, alloc, dealloc, keyboard::KeyEvent};
-use alloc::format;
+pub use alloc::format;
-use core::{
+use core::alloc::{GlobalAlloc, Layout};
-    alloc::{GlobalAlloc, Layout},
-    panic::PanicInfo,
-};
-pub use main_proc_macro::main;
 use rand_core::RngCore;
 
-#[panic_handler]
-fn panic(info: &PanicInfo) -> ! {
-    print!("user panic: {} @ {:?}", info.message(), info.location(),);
-    loop {}
-}
-
 #[global_allocator]
 static ALLOC: Alloc = Alloc;
 
@@ -37,7 +27,7 @@ unsafe impl GlobalAlloc for Alloc {
 #[macro_export]
 macro_rules! print {
     ($($arg:tt)*) => {{
-        let s = format!($($arg)*);
+        let s = $crate::format!($($arg)*);
         $crate::abi_sys::print(s.as_ptr(), s.len());
     }};
 }
@@ -150,7 +140,9 @@ impl RngCore for Rng {
 }
 
 pub mod fs {
-    use embedded_sdmmc::DirEntry;
+    use core::fmt::Display;
+
+    use alloc::{format, vec::Vec};
 
     pub fn read_file(file: &str, read_from: usize, buf: &mut [u8]) -> usize {
         abi_sys::read_file(
@@ -162,8 +154,85 @@ pub mod fs {
         )
     }
 
-    pub fn list_dir(path: &str, files: &mut [Option<DirEntry>]) -> usize {
+    pub struct FileName<'a> {
-        abi_sys::list_dir(path.as_ptr(), path.len(), files.as_mut_ptr(), files.len())
+        full: &'a str,
+        base: &'a str,
+        ext: Option<&'a str>,
+    }
+
+    impl<'a> FileName<'a> {
+        pub fn full_name(&self) -> &str {
+            self.full
+        }
+
+        pub fn base(&self) -> &str {
+            self.base
+        }
+
+        pub fn extension(&self) -> Option<&str> {
+            self.ext
+        }
+    }
+
+    impl<'a> Display for FileName<'a> {
+        fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+            write!(f, "{}", self.full_name())
+        }
+    }
+
+    impl<'a> From<&'a str> for FileName<'a> {
+        fn from(s: &'a str) -> FileName<'a> {
+            let full = s;
+
+            // Split on last dot for extension
+            let (base, ext) = match s.rfind('.') {
+                Some(idx) => (&s[..idx], Some(&s[idx + 1..])),
+                None => (s, None),
+            };
+
+            FileName { full, base, ext }
+        }
+    }
+
+    const MAX_ENTRY_NAME_LEN: usize = 25;
+    const MAX_ENTRIES: usize = 25;
+
+    #[derive(Clone, Copy)]
+    pub struct Entries([[u8; MAX_ENTRY_NAME_LEN]; MAX_ENTRIES]);
+
+    impl Entries {
+        pub fn new() -> Self {
+            Self([[0; MAX_ENTRY_NAME_LEN]; MAX_ENTRIES])
+        }
+
+        /// Get list of file names after listing
+        pub fn entries<'a>(&'a self) -> Vec<FileName<'a>> {
+            self.0
+                .iter()
+                .filter_map(|buf| {
+                    let nul_pos = buf.iter().position(|&b| b == 0).unwrap_or(buf.len());
+                    Some(core::str::from_utf8(&buf[..nul_pos]).ok()?.into())
+                })
+                .collect()
+        }
+
+        fn as_ptrs(&mut self) -> [*mut u8; MAX_ENTRIES] {
+            let mut ptrs: [*mut u8; MAX_ENTRIES] = [core::ptr::null_mut(); MAX_ENTRIES];
+            for (i, buf) in self.0.iter_mut().enumerate() {
+                ptrs[i] = buf.as_mut_ptr();
+            }
+            ptrs
+        }
+    }
+
+    pub fn list_dir(path: &str, entries: &mut Entries) -> usize {
+        abi_sys::list_dir(
+            path.as_ptr(),
+            path.len(),
+            entries.as_ptrs().as_mut_ptr(),
+            MAX_ENTRIES,
+            MAX_ENTRY_NAME_LEN,
+        )
     }
 
     pub fn file_len(str: &str) -> usize {

abi_sys/Cargo.toml

@@ -12,7 +12,6 @@ defmt = ["dep:defmt"]
 strum = { version = "0.27.2", default-features = false, features = ["derive"] }
 bitflags = "2.9.4"
 embedded-graphics = "0.8.1"
-embedded-sdmmc = { version = "0.9.0", default-features = false }
 defmt = { version = "0.3", optional = true }
 
 [build-dependencies]

abi_sys/src/lib.rs

@@ -1,14 +1,13 @@
 #![no_std]
-
 #[cfg(feature = "alloc")]
 use core::alloc::Layout;
 
+use core::ffi::c_char;
 use embedded_graphics::{
     Pixel,
     pixelcolor::{Rgb565, raw::RawU16},
     prelude::{IntoStorage, Point},
 };
-use embedded_sdmmc::DirEntry;
 use strum::{EnumCount, EnumIter};
 
 pub type EntryFn = fn();
@@ -396,21 +395,23 @@ pub extern "C" fn gen_rand(req: &mut RngRequest) {
 pub type ListDir = extern "C" fn(
     str: *const u8,
     len: usize,
-    files: *mut Option<DirEntry>,
+    entries: *mut *mut c_char,
     file_len: usize,
+    max_entry_str_len: usize,
 ) -> usize;
 
 #[unsafe(no_mangle)]
 pub extern "C" fn list_dir(
     str: *const u8,
     len: usize,
-    files: *mut Option<DirEntry>,
+    entries: *mut *mut c_char,
-    file_len: usize,
+    entry_count: usize,
+    max_entry_str_len: usize,
 ) -> usize {
     unsafe {
         let ptr = CALL_ABI_TABLE[CallTable::ListDir as usize];
         let f: ListDir = core::mem::transmute(ptr);
-        f(str, len, files, file_len)
+        f(str, len, entries, entry_count, max_entry_str_len)
     }
 }
 

kernel/src/abi.rs

@@ -3,11 +3,11 @@ use abi_sys::{
     PrintAbi, ReadFile, RngRequest, SleepMsAbi, keyboard::*,
 };
 use alloc::{string::ToString, vec::Vec};
-use core::{alloc::GlobalAlloc, sync::atomic::Ordering};
+use core::{alloc::GlobalAlloc, ffi::c_char, ptr, sync::atomic::Ordering};
 use embassy_rp::clocks::{RoscRng, clk_sys_freq};
 use embassy_time::Instant;
 use embedded_graphics::draw_target::DrawTarget;
-use embedded_sdmmc::{DirEntry, LfnBuffer};
+use embedded_sdmmc::LfnBuffer;
 use heapless::spsc::Queue;
 
 use crate::{
@@ -116,11 +116,27 @@ pub extern "C" fn gen_rand(req: &mut RngRequest) {
     }
 }
 
-fn get_dir_entries(dir: &Dir, files: &mut [Option<DirEntry>]) -> usize {
+unsafe fn copy_entry_to_user_buf(name: &[u8], dest: *mut c_char, max_str_len: usize) {
+    if !dest.is_null() {
+        let len = name.len().min(max_str_len - 1);
+        unsafe {
+            ptr::copy_nonoverlapping(name.as_ptr(), dest as *mut u8, len);
+            *dest.add(len) = 0; // nul terminator
+        }
+    }
+}
+
+unsafe fn get_dir_entries(dir: &Dir, entries: &mut [*mut c_char], max_str_len: usize) -> usize {
+    let mut b = [0; 25];
+    let mut buf = LfnBuffer::new(&mut b);
     let mut i = 0;
-    dir.iterate_dir(|entry| {
+    dir.iterate_dir_lfn(&mut buf, |entry, lfn_name| {
-        if i < files.len() {
+        if i < entries.len() {
-            files[i] = Some(entry.clone());
+            if let Some(name) = lfn_name {
+                unsafe { copy_entry_to_user_buf(name.as_bytes(), entries[i], max_str_len) };
+            } else {
+                unsafe { copy_entry_to_user_buf(entry.name.base_name(), entries[i], max_str_len) };
+            }
             i += 1;
         }
     })
@@ -128,24 +144,30 @@ fn get_dir_entries(dir: &Dir, files: &mut [Option<DirEntry>]) -> usize {
     i
 }
 
-fn recurse_dir(dir: &Dir, dirs: &[&str], files: &mut [Option<DirEntry>]) -> usize {
+unsafe fn recurse_dir(
+    dir: &Dir,
+    dirs: &[&str],
+    entries: &mut [*mut c_char],
+    max_str_len: usize,
+) -> usize {
     if dirs.is_empty() {
-        return get_dir_entries(dir, files);
+        return unsafe { get_dir_entries(dir, entries, max_str_len) };
     }
 
     let dir = dir.open_dir(dirs[0]).unwrap();
-    recurse_dir(&dir, &dirs[1..], files)
+    unsafe { recurse_dir(&dir, &dirs[1..], entries, max_str_len) }
 }
 
 const _: ListDir = list_dir;
 pub extern "C" fn list_dir(
     dir: *const u8,
     len: usize,
-    files: *mut Option<DirEntry>,
+    entries: *mut *mut c_char,
     files_len: usize,
+    max_entry_str_len: usize,
 ) -> usize {
     // SAFETY: caller guarantees `ptr` is valid for `len` bytes
-    let files = unsafe { core::slice::from_raw_parts_mut(files, files_len) };
+    let files = unsafe { core::slice::from_raw_parts_mut(entries, files_len) };
     // SAFETY: caller guarantees `ptr` is valid for `len` bytes
     let dir = unsafe { core::str::from_raw_parts(dir, len) };
     let dirs: Vec<&str> = dir.split('/').collect();
@@ -156,10 +178,12 @@ pub extern "C" fn list_dir(
     let mut wrote = 0;
     sd.access_root_dir(|root| {
         if dirs[0] == "" && dirs.len() >= 2 {
-            if dir == "/" {
+            unsafe {
-                wrote = get_dir_entries(&root, files);
+                if dir == "/" {
-            } else {
+                    wrote = get_dir_entries(&root, files, max_entry_str_len);
-                wrote = recurse_dir(&root, &dirs[1..], files);
+                } else {
+                    wrote = recurse_dir(&root, &dirs[1..], files, max_entry_str_len);
+                }
             }
         }
     });

kernel/src/main.rs

@@ -29,6 +29,7 @@ use crate::{heap::init_qmi_psram_heap, psram::init_psram_qmi};
 use crate::{
     abi::{KEY_CACHE, MS_SINCE_LAUNCH},
     display::{FRAMEBUFFER, display_handler, init_display},
+    heap::HEAP,
     peripherals::{
         conf_peripherals,
         keyboard::{KeyState, read_keyboard_fifo},
@@ -321,7 +322,7 @@ async fn kernel_task(
     watchdog: Peri<'static, WATCHDOG>,
     display: Display,
     sd: Sd,
-    _psram: Psram,
+    psram: Psram,
     mcu: Mcu,
     usb: Peri<'static, USB>,
 ) {

main_proc_macro/Cargo.toml

@@ -1,11 +0,0 @@
-[package]
-name = "main_proc_macro"
-version = "0.1.0"
-edition = "2024"
-
-[lib]
-proc-macro = true
-
-[dependencies]
-quote = "1.0.41"
-syn = "2.0.108"

main_proc_macro/src/lib.rs

@@ -1,21 +0,0 @@
-use proc_macro::TokenStream;
-use quote::quote;
-use syn::{ItemFn, parse_macro_input};
-
-#[proc_macro_attribute]
-pub fn main(_attr: TokenStream, item: TokenStream) -> TokenStream {
-    let input = parse_macro_input!(item as ItemFn);
-    let name = &input.sig.ident;
-
-    // ensure we emit _start in the same module as the fn
-    let expanded = quote! {
-        #input
-
-        #[unsafe(no_mangle)]
-        pub extern "Rust" fn _start() {
-            #name();
-        }
-    };
-
-    expanded.into()
-}

selection_ui/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "selection_ui"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+abi = { path = "../abi" }
+embedded-graphics = "0.8.1"
+embedded-layout = "0.4.2"
+embedded-text = "0.7.3"

selection_ui/src/lib.rs

@@ -0,0 +1,119 @@
+#![no_std]
+
+extern crate alloc;
+
+use abi::{
+    display::Display,
+    get_key,
+    keyboard::{KeyCode, KeyState},
+    print, sleep,
+};
+use alloc::vec::Vec;
+use embedded_graphics::{
+    Drawable,
+    mono_font::{MonoTextStyle, ascii::FONT_10X20},
+    pixelcolor::Rgb565,
+    prelude::{Dimensions, Point, Primitive, RgbColor, Size},
+    primitives::{PrimitiveStyle, Rectangle},
+    text::Text,
+};
+use embedded_layout::{
+    align::{horizontal, vertical},
+    layout::linear::{FixedMargin, LinearLayout},
+    prelude::*,
+};
+use embedded_text::TextBox;
+
+pub struct SelectionUi<'a> {
+    selection: usize,
+    items: &'a [&'a str],
+    error: &'a str,
+    last_bounds: Option<Rectangle>,
+}
+
+impl<'a> SelectionUi<'a> {
+    pub fn new(items: &'a [&'a str], error: &'a str) -> Self {
+        Self {
+            selection: 0,
+            items,
+            error,
+            last_bounds: None,
+        }
+    }
+
+    pub fn run_selection_ui(&mut self, display: &mut Display) -> Result<Option<usize>, ()> {
+        self.draw(display)?;
+        let selection;
+        loop {
+            let key = get_key();
+            if key.state == KeyState::Pressed {
+                print!("Got Key press: {:?}", key.key);
+                if let Some(s) = self.update(display, key.key)? {
+                    selection = Some(s);
+                    break;
+                }
+            }
+        }
+        Ok(selection)
+    }
+
+    /// updates the display with a new keypress.
+    /// returns selection idx if selected
+    pub fn update(&mut self, display: &mut Display, key: KeyCode) -> Result<Option<usize>, ()> {
+        match key {
+            KeyCode::JoyUp => {
+                self.selection = self.selection.saturating_sub(1);
+            }
+            KeyCode::JoyDown => {
+                self.selection = self.selection.saturating_add(1);
+            }
+            KeyCode::Enter | KeyCode::JoyRight => return Ok(Some(self.selection)),
+            _ => return Ok(Some(self.selection)),
+        };
+        self.draw(display)?;
+        Ok(None)
+    }
+
+    fn draw(&mut self, display: &mut Display) -> Result<(), ()> {
+        let text_style = MonoTextStyle::new(&FONT_10X20, Rgb565::WHITE);
+        let display_area = display.bounding_box();
+
+        if self.items.is_empty() {
+            TextBox::new(
+                &self.error,
+                Rectangle::new(
+                    Point::new(25, 25),
+                    Size::new(display_area.size.width - 50, display_area.size.width - 50),
+                ),
+                text_style,
+            )
+            .draw(display)
+            .unwrap();
+        }
+
+        let mut views: Vec<Text<MonoTextStyle<Rgb565>>> = Vec::new();
+
+        for i in self.items {
+            views.push(Text::new(i, Point::zero(), text_style));
+        }
+
+        let views_group = Views::new(views.as_mut_slice());
+
+        let layout = LinearLayout::vertical(views_group)
+            .with_alignment(horizontal::Center)
+            .with_spacing(FixedMargin(5))
+            .arrange()
+            .align_to(&display_area, horizontal::Center, vertical::Center);
+
+        // draw selected box
+        let selected_bounds = layout.inner().get(self.selection).ok_or(())?.bounding_box();
+        Rectangle::new(selected_bounds.top_left, selected_bounds.size)
+            .into_styled(PrimitiveStyle::with_stroke(Rgb565::WHITE, 1))
+            .draw(display)?;
+
+        self.last_bounds = Some(layout.bounds());
+
+        layout.draw(display)?;
+        Ok(())
+    }
+}

user-apps/calculator/src/main.rs

@@ -9,6 +9,7 @@ use abi::{
     print,
 };
 use alloc::{format, string::String, vec, vec::Vec};
+use core::panic::PanicInfo;
 use embedded_graphics::{
     Drawable,
     geometry::{Dimensions, Point},
@@ -25,6 +26,12 @@ use embedded_layout::{
     prelude::Chain,
 };
 
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location(),);
+    loop {}
+}
+
 #[unsafe(no_mangle)]
 pub extern "Rust" fn _start() {
     main()

user-apps/gallery/src/main.rs

@@ -5,25 +5,35 @@
 extern crate alloc;
 use abi::{
     display::{Display, SCREEN_HEIGHT, SCREEN_WIDTH},
-    fs::{list_dir, read_file},
+    fs::{Entries, list_dir, read_file},
     get_key,
     keyboard::{KeyCode, KeyState},
-    main, print,
+    print,
 };
-use alloc::{format, string::ToString, vec};
+use alloc::{format, vec};
+use core::panic::PanicInfo;
 use embedded_graphics::{
     Drawable, image::Image, mono_font::MonoTextStyle, mono_font::ascii::FONT_6X10,
     pixelcolor::Rgb565, prelude::*, text::Text,
 };
 use tinybmp::Bmp;
 
-#[main]
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location());
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "Rust" fn _start() {
+    main()
+}
+
 pub fn main() {
     print!("Starting Gallery app");
     let mut bmp_buf = vec![0_u8; 100_000];
     let mut display = Display;
 
-    // Grid parameters
     let grid_cols = 3;
     let grid_rows = 3;
     let cell_width = SCREEN_WIDTH as i32 / grid_cols;
@@ -31,50 +41,44 @@ pub fn main() {
 
     let mut images_drawn = 0;
 
-    let mut files = [const { None }; 18];
+    let mut entries = Entries::new();
-    let files_num = list_dir("/images", &mut files);
+    let files_num = list_dir("/images", &mut entries);
 
-    for file in &files[2..files_num] {
+    for file in &entries.entries()[2..files_num] {
         if images_drawn >= grid_cols * grid_rows {
             break; // only draw 3x3
         }
 
-        if let Some(f) = file {
+        print!("file: {}", file);
-            print!("file: {}", f.name);
+        if file.extension().unwrap_or("") == "bmp" || file.extension().unwrap_or("") == "BMP" {
-            if f.name.extension() == b"bmp" || f.name.extension() == b"BMP" {
+            let file_path = format!("/images/{}", file);
-                let file = format!("/images/{}", f.name);
 
-                let read = read_file(&file, 0, &mut &mut bmp_buf[..]);
+            let read = read_file(&file_path, 0, &mut &mut bmp_buf[..]);
-                if read > 0 {
+            if read > 0 {
-                    let bmp = Bmp::from_slice(&bmp_buf).expect("failed to parse bmp");
+                let bmp = Bmp::from_slice(&bmp_buf).expect("failed to parse bmp");
 
-                    let row = images_drawn / grid_cols;
+                let row = images_drawn / grid_cols;
-                    let col = images_drawn % grid_cols;
+                let col = images_drawn % grid_cols;
-                    let cell_x = col * cell_width;
+                let cell_x = col * cell_width;
-                    let cell_y = row * cell_height;
+                let cell_y = row * cell_height;
 
-                    // Center image inside cell
+                // Center image inside cell
-                    let bmp_w = bmp.size().width as i32;
+                let bmp_w = bmp.size().width as i32;
-                    let bmp_h = bmp.size().height as i32;
+                let bmp_h = bmp.size().height as i32;
-                    let x = cell_x + (cell_width - bmp_w) / 2;
+                let x = cell_x + (cell_width - bmp_w) / 2;
-                    let y = cell_y + 5; // 5px top margin
+                let y = cell_y + 5; // 5px top margin
 
-                    Image::new(&bmp, Point::new(x, y))
+                Image::new(&bmp, Point::new(x, y))
-                        .draw(&mut display)
-                        .unwrap();
-
-                    let text_style = MonoTextStyle::new(&FONT_6X10, Rgb565::WHITE);
-                    let text_y = y + bmp_h + 2; // 2px gap under image
-                    Text::new(
-                        f.name.to_string().as_str(),
-                        Point::new(cell_x + 2, text_y),
-                        text_style,
-                    )
                     .draw(&mut display)
                     .unwrap();
 
-                    images_drawn += 1;
+                let text_style = MonoTextStyle::new(&FONT_6X10, Rgb565::WHITE);
-                }
+                let text_y = y + bmp_h + 2; // 2px gap under image
+                Text::new(&file.base(), Point::new(cell_x + 2, text_y), text_style)
+                    .draw(&mut display)
+                    .unwrap();
+
+                images_drawn += 1;
             }
         }
     }

user-apps/gif/Cargo.toml

@@ -6,4 +6,5 @@ edition = "2024"
 [dependencies]
 abi = { path = "../../abi" }
 embedded-graphics = "0.8.1"
+selection_ui = { path = "../../selection_ui" }
 tinygif = { git = "https://github.com/LegitCamper/tinygif" }

user-apps/gif/src/main.rs

@@ -4,29 +4,55 @@
 extern crate alloc;
 use abi::{
     display::Display,
-    fs::{file_len, read_file},
+    fs::{Entries, file_len, list_dir, read_file},
     get_key, get_ms,
     keyboard::{KeyCode, KeyState},
-    main, print, sleep,
+    print, sleep,
 };
-use alloc::{format, vec};
+use alloc::{format, vec, vec::Vec};
+use core::panic::PanicInfo;
 use embedded_graphics::{
     image::ImageDrawable, pixelcolor::Rgb565, prelude::Point, transform::Transform,
 };
+use selection_ui::SelectionUi;
 use tinygif::Gif;
 
-#[main]
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location(),);
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "Rust" fn _start() {
+    main()
+}
+
 pub fn main() {
     print!("Starting Gif app");
     let mut display = Display;
 
-    let size = file_len("/gifs/bad_apple.gif");
+    let mut entries = Entries::new();
+    list_dir("/gifs", &mut entries);
+
+    let mut files = entries.entries();
+    files.retain(|e| e.extension().unwrap_or("") == "gif");
+    let gifs = &files.iter().map(|e| e.full_name()).collect::<Vec<&str>>();
+
+    let mut selection_ui = SelectionUi::new(&gifs, "No Gif files found in /gifs");
+    let selection = selection_ui
+        .run_selection_ui(&mut display)
+        .expect("failed to draw")
+        .expect("Failed to get user selection");
+
+    let file_name = format!("/gifs/{}", gifs[selection]);
+    let size = file_len(&file_name);
     let mut buf = vec![0_u8; size];
-    let read = read_file("/gifs/bad_apple.gif", 0, &mut buf);
+    let read = read_file(&file_name, 0, &mut buf);
     print!("read: {}, file size: {}", read, size);
     assert!(read == size);
 
-    let gif = Gif::<Rgb565>::from_slice(&buf).unwrap();
+    let gif = Gif::<Rgb565>::from_slice(&buf).expect("Failed to parse gif");
     let height = gif.height();
 
     let mut frame_num = 0;

user-apps/snake/src/main.rs

@@ -9,10 +9,16 @@ use abi::{
     keyboard::{KeyCode, KeyState},
     print, sleep,
 };
-use alloc::format;
+use core::panic::PanicInfo;
 use embedded_graphics::{pixelcolor::Rgb565, prelude::RgbColor};
 use embedded_snake::{Direction, SnakeGame};
 
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location(),);
+    loop {}
+}
+
 #[unsafe(no_mangle)]
 pub extern "Rust" fn _start() {
     main()