feat: add lvgl based impl

lvgl-based/.cargo/config.toml

@@ -4,7 +4,7 @@ target = "xtensa-esp32-espidf"
 [target.xtensa-esp32-espidf]
 linker = "ldproxy"
 # runner = "espflash --monitor" # Select this runner for espflash v1.x.x
-runner = "espflash flash --monitor" # Select this runner for espflash v2.x.x
+runner = "espflash flash --monitor --baud 921600" # Select this runner for espflash v2.x.x
 rustflags = [
     # Extending time_t for ESP IDF 5: https://github.com/esp-rs/rust/issues/110
     "--cfg",
@@ -31,3 +31,6 @@ CROSS_COMPILE = "xtensa-esp32-elf"
 
 # Directory for custom fonts (written in C) that Lvgl can use
 LVGL_FONTS_DIR = {relative = true, value = "custom-fonts"}
+
+PATH="/usr/lib64/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/var/lib/snapd/snap/bin:/home/yannik/.rustup/toolchains/esp/xtensa-esp32s2-elf/esp-2021r2-patch5-8_4_0/xtensa-esp32s2-elf/bin:/home/yannik/.rustup/toolchains/esp/xtensa-esp32s3-elf/esp-2021r2-patch5-8_4_0/xtensa-esp32s3-elf/bin:/home/yannik/.rustup/toolchains/esp/xtensa-esp32-elf/esp-2021r2-patch5-8_4_0/xtensa-esp32-elf/bin:/home/yannik/.rustup/toolchains/esp/riscv32-esp-elf/esp-2021r2-patch5-8_4_0/riscv32-esp-elf/bin:"
+LIBCLANG_PATH="/home/yannik/.rustup/toolchains/esp/xtensa-esp32-elf-clang/esp-15.0.0-20221201/esp-clang/lib"

lvgl-based/Cargo.toml

@@ -15,6 +15,12 @@ opt-level = "s"
 debug     = true # Symbols are nice and they don't increase the size on Flash
 opt-level = "z"
 
+[[bin]]
+name = "starter"
+
+[[bin]]
+name = "timer"
+
 [features]
 default = ["embassy", "esp-idf-svc/native", "std"]
 
@@ -50,6 +56,12 @@ display-interface-spi = "0.5.0"
 mipidsi               = "0.8.0"
 static_cell = "2.1.0"
 
+xpt2046 = { git = "https://github.com/Yandrik/xpt2046.git", version = "0.3.1" }
+
+embedded-graphics-profiler-display = { version = "0.1.0", path = "../embedded-graphics-profiler-display", features = ["std"] }
+
+
+
 
 [build-dependencies]
 embuild = "0.32.0"

lvgl-based/sdkconfig.defaults

@@ -1,6 +1,6 @@
 # Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
 CONFIG_ESP_MAIN_TASK_STACK_SIZE=8000
-# CONFIG_ESP_MAIN_TASK_STACK_SIZE=16000
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=48000
 
 # Use this to set FreeRTOS kernel tick frequency to 1000 Hz (100 Hz by default).
 # This allows to use 1 ms granuality for thread sleeps (10 ms by default).

lvgl-based/src/bin/starter.rs

@@ -0,0 +1,266 @@
+use std::{
+    cell::RefCell,
+    sync::mpsc::channel,
+    thread,
+    time::{Duration, Instant},
+};
+use std::cmp::min;
+use cstr_core::CString;
+use display_interface_spi::SPIInterface;
+use embedded_graphics_core::{draw_target::DrawTarget, prelude::Point};
+use esp_idf_hal::spi::SpiSingleDeviceDriver;
+use esp_idf_hal::{
+    delay::{self, Delay},
+    gpio::*,
+    peripherals::Peripherals,
+    spi::{config::DriverConfig, Dma, SpiConfig, SpiDeviceDriver},
+    units::FromValueType, // for converting 26MHz to value
+};
+use lvgl::{
+    font::Font,
+    input_device::{
+        pointer::{Pointer, PointerInputData},
+        InputDriver,
+    },
+    style::Style,
+    widgets::{Btn, Label},
+    Align,
+    Color,
+    Display,
+    DrawBuffer,
+    LvError,
+    Part,
+    TextAlign,
+    Widget,
+};
+use mipidsi::{
+    models::ILI9486Rgb565,
+    options::{ColorInversion, ColorOrder, Orientation, Rotation},
+    Builder,
+};
+use xpt2046::Xpt2046;
+use embedded_graphics_profiler_display::ProfilerDisplay;
+
+fn main() -> Result<(), LvError> {
+    const HOR_RES: u32 = 320;
+    const VER_RES: u32 = 240;
+    const LINES: u32 = 20;
+
+    // It is necessary to call this function once. Otherwise some patches to the
+    // runtime implemented by esp-idf-sys might not link properly. See https://github.com/esp-rs/esp-idf-template/issues/71
+    esp_idf_svc::sys::link_patches();
+
+    // Initialize lvgl
+    lvgl::init();
+
+    // Bind the log crate to the ESP Logging facilities
+    esp_idf_svc::log::EspLogger::initialize_default();
+
+    log::info!("================= Starting App =======================");
+
+    let peripherals = Peripherals::take().unwrap();
+
+    // #[allow(unused)]
+    let pins = peripherals.pins;
+
+    let sclk = pins.gpio14;
+    let miso = pins.gpio12;
+    let mosi = pins.gpio13;
+    let cs = pins.gpio15;
+    let dc = pins.gpio2;
+
+    let spi = SpiDeviceDriver::new_single(
+        peripherals.spi2,
+        sclk,       // sclk
+        mosi,       // sdo
+        Some(miso), // sdi
+        Some(cs),   // cs
+        &DriverConfig::new().dma(Dma::Channel1(4096)),
+        &SpiConfig::new().write_only(true).baudrate(10.MHz().into()),
+    )
+    .unwrap();
+
+    // let rst = PinDriver::output(pins.gpio33).unwrap();
+    let dc = PinDriver::output(dc).unwrap();
+    let di = SPIInterface::new(spi, dc);
+
+    // Turn backlight on
+    let mut bklt = PinDriver::output(pins.gpio21).unwrap();
+    bklt.set_high().unwrap();
+
+    // Configuration for M5Stack Core Development Kit V1.0
+    // Puts display in landscape mode with the three buttons at the bottom of screen
+    // let mut m5stack_display = Builder::ili9342c_rgb565(di)
+    //     .with_display_size(320, 240)
+    //     .with_color_order(ColorOrder::Bgr)
+    //     .with_orientation(Orientation::Portrait(false))
+    //     .with_invert_colors(mipidsi::ColorInversion::Inverted)
+    //     .init(&mut delay::Ets, Some(rst))
+    //     .unwrap();
+
+    // 0.6.0
+    // let mut raw_display = Builder::ili9342c_rgb565(di)
+    //     .with_orientation(Orientation::Portrait(false))
+    //     .with_color_order(ColorOrder::Bgr)
+    //     .with_invert_colors(true)
+    //     .init(&mut Delay::new_default(), None::<PinDriver<AnyOutputPin, Output>>)
+    //     .unwrap();
+
+    let raw_display = Builder::new(ILI9486Rgb565, di)
+        .orientation(Orientation {
+            rotation: Rotation::Deg90,
+            mirrored: true,
+        })
+        .color_order(ColorOrder::Bgr)
+        .invert_colors(ColorInversion::Inverted)
+        .init(&mut Delay::new_default())
+        .unwrap();
+
+    let mut raw_display = ProfilerDisplay::new(raw_display);
+
+    // Stack size value - 20,000 for 10 lines,  40,000 for 20 lines
+    // let (touch_send, touch_recv) = channel();
+    let touch_irq = pins.gpio36;
+    let touch_mosi = pins.gpio32;
+    let touch_miso = pins.gpio39;
+    let touch_clk = pins.gpio25;
+    let touch_cs = pins.gpio33;
+
+    let mut touch_driver = Xpt2046::new(
+        SpiDeviceDriver::new_single(
+            peripherals.spi3,
+            touch_clk,
+            touch_mosi,
+            Some(touch_miso),
+            Some(touch_cs),
+            &DriverConfig::new(),
+            &SpiConfig::new().write_only(true).baudrate(2.MHz().into()),
+        )
+        .unwrap(),
+        PinDriver::input(touch_irq).unwrap(),
+        xpt2046::Orientation::LandscapeFlipped,
+    );
+    touch_driver.set_num_samples(1);
+    touch_driver.init(&mut Delay::new_default()).unwrap();
+
+    let touch_driver = RefCell::new(touch_driver);
+
+    let _lvgl_thread = thread::Builder::new()
+        .stack_size(40_000)
+        .spawn(move || {
+            println!("thread started");
+
+            let buffer = DrawBuffer::<{ (HOR_RES * LINES) as usize }>::default();
+            let display = Display::register(buffer, HOR_RES, VER_RES, |refresh| {
+                raw_display.draw_iter(refresh.as_pixels()).unwrap();
+            })
+            .unwrap();
+
+            // Register a new input device that's capable of reading the current state of
+            // the input
+            // let mut last_touch = RefCell::new(None);
+            let _touch_screen = Pointer::register(
+                || {
+                    let mut td_ref = touch_driver.borrow_mut();
+                    td_ref.run().expect("Running Touch driver failed");
+                    if td_ref.is_touched() {
+                        let point = td_ref.get_touch_point();
+                        PointerInputData::Touch(point).pressed().once()
+                    } else {
+                        PointerInputData::Touch(Point::new(0, 0)).released().once()
+                    }
+                },
+                &display,
+            );
+
+            // Create screen and widgets
+            let mut screen = display.get_scr_act().unwrap();
+            let mut screen_style = Style::default();
+            screen_style.set_bg_color(Color::from_rgb((0, 0, 0)));
+            screen_style.set_radius(0);
+            screen.add_style(Part::Main, &mut screen_style);
+
+            let mut time = Label::new().unwrap();
+            let mut style_time = Style::default();
+            style_time.set_text_color(Color::from_rgb((255, 255, 255))); // white
+            style_time.set_text_align(TextAlign::Center);
+
+            // Custom font requires lvgl-sys in Cargo.toml and 'use lvgl_sys' in this file
+            style_time.set_text_font(unsafe { Font::new_raw(lvgl_sys::gotham_bold_80) });
+
+            time.add_style(Part::Main, &mut style_time);
+
+            // Time text will be centered in screen
+            time.set_align(Align::Center, 0, 0);
+
+            let mut button = Btn::create(&mut screen).unwrap();
+            button.set_align(Align::LeftMid, 30, 0);
+            button.set_size(180, 80);
+            let mut btn_lbl = Label::create(&mut button).unwrap();
+            btn_lbl.set_text(CString::new("Click me!").unwrap().as_c_str());
+
+            let mut btn_state = false;
+            button.on_event(|_btn, event| {
+                // println!("Button received event: {:?}", event);
+                if let lvgl::Event::Clicked = event {
+                    if btn_state {
+                        let nt = CString::new("Click me!").unwrap();
+                        btn_lbl.set_text(nt.as_c_str()).unwrap();
+                    } else {
+                        let nt = CString::new("Clicked!").unwrap();
+                        btn_lbl.set_text(nt.as_c_str()).unwrap();
+                    }
+                    btn_state = !btn_state;
+                }
+            });
+
+            let mut i = 0;
+
+            loop {
+                let start_time = Instant::now();
+                if i > 59 {
+                    i = 0;
+                }
+
+                let val = CString::new(format!("21:{:02}", i)).unwrap();
+                time.set_text(&val).unwrap();
+                i += 1;
+
+                let start_draw_time = Instant::now();
+                lvgl::task_handler();
+
+                // Simulate clock - so sleep for one second so time text is incremented in
+                // seconds
+                delay::FreeRtos::delay_ms(10);
+
+                lvgl::tick_inc(Instant::now().duration_since(start_time));
+
+
+                let end_time = Instant::now();
+                let draw_time = raw_display.get_time();
+                let prep_time = start_draw_time - start_time;
+                let proc_time = end_time - start_draw_time;
+                let proc_time = proc_time - min(draw_time, proc_time);
+
+                if draw_time.as_micros() > 0 {
+                    println!(
+                        "draw time: {}.{:03}ms | prep time: {}.{:03}ms | proc time: {}.{:03}ms | total time: {}.{:03}ms",
+                        draw_time.as_millis(),
+                        draw_time.as_micros() % 100,
+                        prep_time.as_millis(),
+                        prep_time.as_micros() % 100,
+                        proc_time.as_millis(),
+                        proc_time.as_micros() % 100,
+                        (draw_time + prep_time + proc_time).as_millis(),
+                        (draw_time + prep_time + proc_time).as_micros() % 100,            );
+                }
+                raw_display.reset_time();
+            }
+        })
+        .unwrap();
+
+    loop {
+        // Don't exit application
+        delay::FreeRtos::delay_ms(1_000_000);
+    }
+}

lvgl-based/src/bin/timer.rs

@@ -0,0 +1,432 @@
+use std::{
+    cell::RefCell,
+    cmp::min,
+    sync::mpsc::channel,
+    thread,
+    time::{Duration, Instant},
+};
+
+use cstr_core::CString;
+use display_interface_spi::SPIInterface;
+use embedded_graphics_core::{draw_target::DrawTarget, prelude::Point};
+use embedded_graphics_profiler_display::ProfilerDisplay;
+use esp_idf_hal::spi::SpiSingleDeviceDriver;
+use esp_idf_hal::{
+    delay::{self, Delay},
+    gpio::*,
+    peripherals::Peripherals,
+    spi::{config::DriverConfig, Dma, SpiConfig, SpiDeviceDriver},
+    units::FromValueType, // for converting 26MHz to value
+};
+use lvgl::{
+    font::Font,
+    input_device::{
+        pointer::{Pointer, PointerInputData},
+        InputDriver,
+    },
+    style::Style,
+    widgets::{Btn, Label},
+    Align,
+    Color,
+    Display,
+    DrawBuffer,
+    Event,
+    LvError,
+    Part,
+    TextAlign,
+    Widget,
+};
+use mipidsi::{
+    models::ILI9486Rgb565,
+    options::{ColorInversion, ColorOrder, Orientation, Rotation},
+    Builder,
+};
+use xpt2046::Xpt2046;
+
+struct AppData {
+    timer_start: Instant,
+    timer_set_duration: Duration,
+    timer_remaining_duration: Duration,
+    timer_running: bool,
+    timer_paused: bool,
+}
+
+impl AppData {
+    fn new() -> Self {
+        Self {
+            timer_start: Instant::now(),
+            timer_set_duration: Duration::from_secs(10),
+            timer_remaining_duration: Duration::from_secs(10),
+            timer_running: false,
+            timer_paused: false,
+        }
+    }
+
+    fn set_timer_duration(&mut self, duration: Duration) {
+        self.timer_set_duration = duration;
+    }
+
+    fn add_secs(&mut self, secs: u64) {
+        self.set_timer_duration(
+            self.timer_set_duration
+                .checked_add(Duration::from_secs(secs))
+                .unwrap_or(Duration::from_secs(5999))
+                .min(Duration::from_secs(5999)),
+        );
+    }
+
+    fn sub_secs(&mut self, secs: u64) {
+        self.set_timer_duration(
+            self.timer_set_duration
+                .checked_sub(Duration::from_secs(secs))
+                .unwrap_or(Duration::from_secs(10))
+                .max(Duration::from_secs(10)),
+        );
+    }
+
+    fn start_timer(&mut self) {
+        if !self.timer_paused {
+            self.timer_remaining_duration = self.timer_set_duration;
+        }
+
+        self.timer_start = Instant::now();
+        self.timer_running = true;
+        self.timer_paused = false;
+    }
+
+    fn pause_timer(&mut self) {
+        self.timer_paused = true;
+        self.timer_remaining_duration = self
+            .timer_remaining_duration
+            .checked_sub(self.timer_start.elapsed())
+            .unwrap_or(Duration::from_secs(0));
+    }
+
+    fn reset_timer(&mut self) {
+        self.timer_start = Instant::now();
+        self.timer_paused = false;
+        self.timer_running = false;
+        self.timer_remaining_duration = self.timer_set_duration;
+    }
+
+    fn remaining(&self) -> Duration {
+        if self.timer_stopped() {
+            self.timer_set_duration
+        } else if self.timer_paused() {
+            self.timer_remaining_duration
+        } else {
+            self.timer_remaining_duration
+                .checked_sub(self.timer_start.elapsed())
+                .unwrap_or(Duration::from_secs(0))
+        }
+    }
+
+    fn timer_stopped(&self) -> bool {
+        !self.timer_running
+    }
+
+    fn timer_paused(&self) -> bool {
+        self.timer_running && self.timer_paused
+    }
+
+    fn timer_running(&self) -> bool {
+        self.timer_running && !self.timer_paused
+    }
+
+    fn timer_finished(&self) -> bool {
+        self.timer_running && self.remaining() == Duration::from_secs(0)
+    }
+}
+
+fn main() -> Result<(), LvError> {
+    const HOR_RES: u32 = 320;
+    const VER_RES: u32 = 240;
+    const LINES: u32 = 20;
+
+    // It is necessary to call this function once. Otherwise some patches to the
+    // runtime implemented by esp-idf-sys might not link properly. See https://github.com/esp-rs/esp-idf-template/issues/71
+    esp_idf_svc::sys::link_patches();
+
+    // Initialize lvgl
+    lvgl::init();
+
+    // Bind the log crate to the ESP Logging facilities
+    esp_idf_svc::log::EspLogger::initialize_default();
+
+    log::info!("================= Starting App =======================");
+
+    let peripherals = Peripherals::take().unwrap();
+
+    // #[allow(unused)]
+    let pins = peripherals.pins;
+
+    let sclk = pins.gpio14;
+    let miso = pins.gpio12;
+    let mosi = pins.gpio13;
+    let cs = pins.gpio15;
+    let dc = pins.gpio2;
+
+    let spi = SpiDeviceDriver::new_single(
+        peripherals.spi2,
+        sclk,       // sclk
+        mosi,       // sdo
+        Some(miso), // sdi
+        Some(cs),   // cs
+        &DriverConfig::new().dma(Dma::Channel1(4096)),
+        &SpiConfig::new().write_only(true).baudrate(10.MHz().into()),
+    )
+    .unwrap();
+
+    // let rst = PinDriver::output(pins.gpio33).unwrap();
+    let dc = PinDriver::output(dc).unwrap();
+    let di = SPIInterface::new(spi, dc);
+
+    // Turn backlight on
+    let mut bklt = PinDriver::output(pins.gpio21).unwrap();
+    bklt.set_high().unwrap();
+
+    // Configuration for M5Stack Core Development Kit V1.0
+    // Puts display in landscape mode with the three buttons at the bottom of screen
+    // let mut m5stack_display = Builder::ili9342c_rgb565(di)
+    //     .with_display_size(320, 240)
+    //     .with_color_order(ColorOrder::Bgr)
+    //     .with_orientation(Orientation::Portrait(false))
+    //     .with_invert_colors(mipidsi::ColorInversion::Inverted)
+    //     .init(&mut delay::Ets, Some(rst))
+    //     .unwrap();
+
+    // 0.6.0
+    // let mut raw_display = Builder::ili9342c_rgb565(di)
+    //     .with_orientation(Orientation::Portrait(false))
+    //     .with_color_order(ColorOrder::Bgr)
+    //     .with_invert_colors(true)
+    //     .init(&mut Delay::new_default(), None::<PinDriver<AnyOutputPin, Output>>)
+    //     .unwrap();
+
+    let raw_display = Builder::new(ILI9486Rgb565, di)
+        .orientation(Orientation {
+            rotation: Rotation::Deg90,
+            mirrored: true,
+        })
+        .color_order(ColorOrder::Bgr)
+        .invert_colors(ColorInversion::Inverted)
+        .init(&mut Delay::new_default())
+        .unwrap();
+
+    let mut raw_display = ProfilerDisplay::new(raw_display);
+
+    // Stack size value - 20,000 for 10 lines,  40,000 for 20 lines
+    // let (touch_send, touch_recv) = channel();
+    let touch_irq = pins.gpio36;
+    let touch_mosi = pins.gpio32;
+    let touch_miso = pins.gpio39;
+    let touch_clk = pins.gpio25;
+    let touch_cs = pins.gpio33;
+
+    let mut touch_driver = Xpt2046::new(
+        SpiDeviceDriver::new_single(
+            peripherals.spi3,
+            touch_clk,
+            touch_mosi,
+            Some(touch_miso),
+            Some(touch_cs),
+            &DriverConfig::new(),
+            &SpiConfig::new().write_only(true).baudrate(2.MHz().into()),
+        )
+        .unwrap(),
+        PinDriver::input(touch_irq).unwrap(),
+        xpt2046::Orientation::LandscapeFlipped,
+    );
+    touch_driver.set_num_samples(1);
+    touch_driver.init(&mut Delay::new_default()).unwrap();
+
+    let touch_driver = RefCell::new(touch_driver);
+
+    let _lvgl_thread = thread::Builder::new()
+        .stack_size(40_000)
+        .spawn(move || {
+            println!("thread started");
+
+            let mut appdata = AppData::new();
+
+            let buffer = DrawBuffer::<{ (HOR_RES * LINES) as usize }>::default();
+            let display = Display::register(buffer, HOR_RES, VER_RES, |refresh| {
+                raw_display.draw_iter(refresh.as_pixels()).unwrap();
+            })
+            .unwrap();
+
+            // Register a new input device that's capable of reading the current state of
+            // the input
+            // let mut last_touch = RefCell::new(None);
+            let _touch_screen = Pointer::register(
+                || {
+                    let mut td_ref = touch_driver.borrow_mut();
+                    td_ref.run().expect("Running Touch driver failed");
+                    if td_ref.is_touched() {
+                        let point = td_ref.get_touch_point();
+                        // println!("touched {:?}", point);
+                        PointerInputData::Touch(Point::new(point.x + 20, 240 - point.y)).pressed().once()
+                    } else {
+                        // println!("untouched");
+                        PointerInputData::Touch(Point::new(0, 0)).released().once()
+                    }
+                },
+                &display,
+            );
+
+            // Create screen and widgets
+            let mut screen = display.get_scr_act().unwrap();
+            let mut screen_style = Style::default();
+            screen_style.set_bg_color(Color::from_rgb((0, 0, 0)));
+            screen_style.set_radius(0);
+            screen.add_style(Part::Main, &mut screen_style);
+
+            let mut time = Label::new().unwrap();
+            let mut style_time = Style::default();
+            style_time.set_text_color(Color::from_rgb((255, 255, 255))); // white
+            style_time.set_text_align(TextAlign::Center);
+
+            // Custom font requires lvgl-sys in Cargo.toml and 'use lvgl_sys' in this file
+
+            time.add_style(Part::Main, &mut style_time);
+
+            // Time text will be centered in screen
+            time.set_align(Align::Center, 0, 0);
+
+            let mut button_add = Btn::create(&mut screen).unwrap();
+            // button_add.set_align(Align::Center, -50, -100);
+            button_add.set_pos(130, 150);
+            button_add.set_size(30, 30);
+            let mut btn_lbl1 = Label::create(&mut button_add).unwrap();
+            btn_lbl1.set_text(CString::new(b"+").unwrap().as_c_str());
+
+            button_add.on_event(|_btn, event| {
+                if let Event::Pressed = event {
+                    println!("pressed");
+                    if appdata.timer_stopped() {
+                        appdata.add_secs(10);
+                    }
+                }
+                // println!("Button received event: {:?}", event);
+            });
+
+            let mut button_sub = Btn::create(&mut screen).unwrap();
+            button_sub.set_pos(170, 150);
+            button_sub.set_size(30, 30);
+            let mut btn_lbl2 = Label::create(&mut button_sub).unwrap();
+            btn_lbl2.set_text(CString::new(b"-").unwrap().as_c_str());
+
+            button_sub.on_event(|_btn, event| {
+                if let Event::Pressed = event {
+                    if appdata.timer_stopped() {
+                        appdata.sub_secs(10);
+                    }
+                }
+            });
+
+            let mut button_reset = Btn::create(&mut screen).unwrap();
+            button_reset.set_pos(123, 190);
+            button_reset.set_size(35, 35);
+            let mut btn_lbl3 = Label::create(&mut button_reset).unwrap();
+            btn_lbl3.set_text(CString::new(b"\xEF\x80\xA1").unwrap().as_c_str());
+
+
+            const PLAY: &'static [u8; 3] = b"\xEF\x81\x8B";
+            const PAUSE: &'static [u8; 3] = b"\xEF\x81\x8C";
+            const STOP: &'static [u8; 3] = b"\xEF\x81\x8D";
+
+            let mut button_start_stop = Btn::create(&mut screen).unwrap();
+            button_start_stop.set_pos(173, 190);
+            button_start_stop.set_size(35, 35);
+            let mut btn_lbl4 = Label::create(&mut button_start_stop).unwrap();
+            btn_lbl4.set_text(CString::new(b"\xEF\x81\x8B").unwrap().as_c_str());
+
+            button_reset.on_event(|_btn, event| {
+                if let Event::Pressed = event {
+                    appdata.reset_timer();
+                    btn_lbl4.set_text(CString::new(PLAY).unwrap().as_c_str());
+                }
+            });
+
+            button_start_stop.on_event(|_btn, event| {
+                if let Event::Pressed = event {
+                    if appdata.timer_finished() {
+                        // println!("Resetting finished timer");
+                        appdata.reset_timer();
+                        btn_lbl4.set_text(CString::new(PLAY).unwrap().as_c_str());
+                    } else if appdata.timer_running() {
+                        // println!("Pausing timer");
+                        appdata.pause_timer();
+                        btn_lbl4.set_text(CString::new(PLAY).unwrap().as_c_str());
+                    } else {
+                        // println!("Starting timer");
+                        appdata.start_timer();
+                        if appdata.timer_finished() {
+                            // println!("Timer already finished");
+                            btn_lbl4.set_text(CString::new(STOP).unwrap().as_c_str());
+                        } else {
+                            // println!("Timer running");
+                            btn_lbl4.set_text(CString::new(PAUSE).unwrap().as_c_str());
+                        }
+                    }
+                }
+            });
+
+            let mut was_finished = false;
+
+            loop {
+                let start_time = Instant::now();
+                let rem_time = appdata.remaining();
+                let val = CString::new(format!("{:02}:{:02}:{:03}",
+                                               rem_time.as_secs() / 60,
+                                               rem_time.as_secs() % 60,
+                                               rem_time.as_millis() % 1000)).unwrap();
+                time.set_text(&val).unwrap();
+
+                if !was_finished && appdata.timer_finished() {
+                    was_finished = true;
+                    btn_lbl4.set_text(CString::new(STOP).unwrap().as_c_str());
+                }
+                was_finished = appdata.timer_finished();
+
+                let start_draw_time = Instant::now();
+                lvgl::task_handler();
+
+                // Simulate clock - so sleep for one second so time text is incremented in
+                // seconds
+                // delay::FreeRtos::delay_ms(1);
+
+                lvgl::tick_inc(Instant::now().duration_since(start_time));
+
+
+                let end_time = Instant::now();
+                let draw_time = raw_display.get_time();
+                let prep_time = start_draw_time - start_time;
+                let proc_time = end_time - start_draw_time;
+                let proc_time = proc_time - min(draw_time, proc_time);
+
+                if draw_time.as_micros() > 0 {
+                    println!(
+                        "draw time: {}.{:03}ms | prep time: {}.{:03}ms | proc time: {}.{:03}ms | total time: {}.{:03}ms",
+                        draw_time.as_millis(),
+                        draw_time.as_micros() % 100,
+                        prep_time.as_millis(),
+                        prep_time.as_micros() % 100,
+                        proc_time.as_millis(),
+                        proc_time.as_micros() % 100,
+                        (draw_time + prep_time + proc_time).as_millis(),
+                        (draw_time + prep_time + proc_time).as_micros() % 100,            );
+                }
+                raw_display.reset_time();
+
+                delay::FreeRtos::delay_ms(1);
+            }
+
+        })
+        .unwrap();
+
+    loop {
+        // Don't exit application
+        delay::FreeRtos::delay_ms(1_000_000);
+    }
+}

lvgl-based/src/main.rs

@@ -125,7 +125,6 @@ fn main() -> Result<(), LvError> {
             style_time.set_text_align(TextAlign::Center);
 
             // Custom font requires lvgl-sys in Cargo.toml and 'use lvgl_sys' in this file
-            style_time.set_text_font(unsafe { Font::new_raw(lvgl_sys::gotham_bold_80) });
 
             time.add_style(Part::Main, &mut style_time);
 
@@ -148,7 +147,7 @@ fn main() -> Result<(), LvError> {
                 lvgl::task_handler();
 
                 // Simulate clock - so sleep for one second so time text is incremented in seconds
-                delay::FreeRtos::delay_ms(1000);
+                delay::FreeRtos::delay_ms(1);
 
                 lvgl::tick_inc(Instant::now().duration_since(start));
             }

lvgl-based/tree.text

@@ -0,0 +1,322 @@
+rust-m5stack-lvgl-demo v0.1.0 (/home/yannik/repos/kolibri-cyd-tester-app-embassy/lvgl-based)
+├── cstr_core v0.2.6
+│   ├── cty v0.2.2
+│   └── memchr v2.7.4
+├── display-interface-spi v0.5.0
+│   ├── byte-slice-cast v1.2.2
+│   ├── display-interface v0.5.0
+│   ├── embedded-hal v1.0.0
+│   └── embedded-hal-async v1.0.0
+│       └── embedded-hal v1.0.0
+├── embedded-graphics-core v0.4.0
+│   ├── az v1.2.1
+│   └── byteorder v1.5.0
+├── esp-idf-hal v0.44.1
+│   ├── atomic-waker v1.1.2
+│   ├── critical-section v1.2.0
+│   ├── embassy-sync v0.6.0
+│   │   ├── cfg-if v1.0.0
+│   │   ├── critical-section v1.2.0
+│   │   ├── embedded-io-async v0.6.1
+│   │   │   └── embedded-io v0.6.1
+│   │   ├── futures-util v0.3.31
+│   │   │   ├── futures-core v0.3.31
+│   │   │   ├── futures-task v0.3.31
+│   │   │   ├── pin-project-lite v0.2.15
+│   │   │   └── pin-utils v0.1.0
+│   │   └── heapless v0.8.0
+│   │       ├── hash32 v0.3.1
+│   │       │   └── byteorder v1.5.0
+│   │       └── stable_deref_trait v1.2.0
+│   ├── embedded-can v0.4.1
+│   │   └── nb v1.1.0
+│   ├── embedded-hal v0.2.7
+│   │   ├── nb v0.1.3
+│   │   │   └── nb v1.1.0
+│   │   └── void v1.0.2
+│   ├── embedded-hal v1.0.0
+│   ├── embedded-hal-async v1.0.0 (*)
+│   ├── embedded-hal-nb v1.0.0
+│   │   ├── embedded-hal v1.0.0
+│   │   └── nb v1.1.0
+│   ├── embedded-io v0.6.1
+│   ├── embedded-io-async v0.6.1 (*)
+│   ├── enumset v1.1.5
+│   │   └── enumset_derive v0.10.0 (proc-macro)
+│   │       ├── darling v0.20.10
+│   │       │   ├── darling_core v0.20.10
+│   │       │   │   ├── fnv v1.0.7
+│   │       │   │   ├── ident_case v1.0.1
+│   │       │   │   ├── proc-macro2 v1.0.89
+│   │       │   │   │   └── unicode-ident v1.0.13
+│   │       │   │   ├── quote v1.0.37
+│   │       │   │   │   └── proc-macro2 v1.0.89 (*)
+│   │       │   │   └── syn v2.0.87
+│   │       │   │       ├── proc-macro2 v1.0.89 (*)
+│   │       │   │       ├── quote v1.0.37 (*)
+│   │       │   │       └── unicode-ident v1.0.13
+│   │       │   └── darling_macro v0.20.10 (proc-macro)
+│   │       │       ├── darling_core v0.20.10 (*)
+│   │       │       ├── quote v1.0.37 (*)
+│   │       │       └── syn v2.0.87 (*)
+│   │       ├── proc-macro2 v1.0.89 (*)
+│   │       ├── quote v1.0.37 (*)
+│   │       └── syn v2.0.87 (*)
+│   ├── esp-idf-sys v0.35.0
+│   │   ├── build-time v0.1.3 (proc-macro)
+│   │   │   ├── chrono v0.4.38
+│   │   │   │   ├── iana-time-zone v0.1.61
+│   │   │   │   └── num-traits v0.2.19
+│   │   │   │       [build-dependencies]
+│   │   │   │       └── autocfg v1.4.0
+│   │   │   ├── once_cell v1.20.2
+│   │   │   ├── proc-macro2 v1.0.89 (*)
+│   │   │   ├── quote v1.0.37 (*)
+│   │   │   └── syn v2.0.87 (*)
+│   │   ├── const_format v0.2.33
+│   │   │   └── const_format_proc_macros v0.2.33 (proc-macro)
+│   │   │       ├── proc-macro2 v1.0.89 (*)
+│   │   │       ├── quote v1.0.37 (*)
+│   │   │       └── unicode-xid v0.2.6
+│   │   └── libc v0.2.162
+│   │   [build-dependencies]
+│   │   ├── anyhow v1.0.93
+│   │   ├── bindgen v0.69.5
+│   │   │   ├── bitflags v2.6.0
+│   │   │   ├── cexpr v0.6.0
+│   │   │   │   └── nom v7.1.3
+│   │   │   │       ├── memchr v2.7.4
+│   │   │   │       └── minimal-lexical v0.2.1
+│   │   │   ├── clang-sys v1.8.1
+│   │   │   │   ├── glob v0.3.1
+│   │   │   │   ├── libc v0.2.162
+│   │   │   │   └── libloading v0.8.5
+│   │   │   │       └── cfg-if v1.0.0
+│   │   │   │   [build-dependencies]
+│   │   │   │   └── glob v0.3.1
+│   │   │   ├── itertools v0.12.1
+│   │   │   │   └── either v1.13.0
+│   │   │   ├── lazy_static v1.5.0
+│   │   │   ├── lazycell v1.3.0
+│   │   │   ├── log v0.4.22
+│   │   │   ├── prettyplease v0.2.25
+│   │   │   │   ├── proc-macro2 v1.0.89 (*)
+│   │   │   │   └── syn v2.0.87 (*)
+│   │   │   ├── proc-macro2 v1.0.89 (*)
+│   │   │   ├── quote v1.0.37 (*)
+│   │   │   ├── regex v1.11.1
+│   │   │   │   ├── aho-corasick v1.1.3
+│   │   │   │   │   └── memchr v2.7.4
+│   │   │   │   ├── memchr v2.7.4
+│   │   │   │   ├── regex-automata v0.4.9
+│   │   │   │   │   ├── aho-corasick v1.1.3 (*)
+│   │   │   │   │   ├── memchr v2.7.4
+│   │   │   │   │   └── regex-syntax v0.8.5
+│   │   │   │   └── regex-syntax v0.8.5
+│   │   │   ├── rustc-hash v1.1.0
+│   │   │   ├── shlex v1.3.0
+│   │   │   ├── syn v2.0.87 (*)
+│   │   │   └── which v4.4.2
+│   │   │       ├── either v1.13.0
+│   │   │       ├── home v0.5.9
+│   │   │       └── rustix v0.38.40
+│   │   │           ├── bitflags v2.6.0
+│   │   │           └── linux-raw-sys v0.4.14
+│   │   ├── cargo_metadata v0.18.1
+│   │   │   ├── camino v1.1.9
+│   │   │   │   └── serde v1.0.215
+│   │   │   │       └── serde_derive v1.0.215 (proc-macro)
+│   │   │   │           ├── proc-macro2 v1.0.89 (*)
+│   │   │   │           ├── quote v1.0.37 (*)
+│   │   │   │           └── syn v2.0.87 (*)
+│   │   │   ├── cargo-platform v0.1.8
+│   │   │   │   └── serde v1.0.215 (*)
+│   │   │   ├── semver v1.0.23
+│   │   │   │   └── serde v1.0.215 (*)
+│   │   │   ├── serde v1.0.215 (*)
+│   │   │   ├── serde_json v1.0.132
+│   │   │   │   ├── itoa v1.0.11
+│   │   │   │   ├── memchr v2.7.4
+│   │   │   │   ├── ryu v1.0.18
+│   │   │   │   └── serde v1.0.215 (*)
+│   │   │   └── thiserror v1.0.69
+│   │   │       └── thiserror-impl v1.0.69 (proc-macro)
+│   │   │           ├── proc-macro2 v1.0.89 (*)
+│   │   │           ├── quote v1.0.37 (*)
+│   │   │           └── syn v2.0.87 (*)
+│   │   ├── embuild v0.32.0
+│   │   │   ├── anyhow v1.0.93
+│   │   │   ├── bindgen v0.69.5 (*)
+│   │   │   ├── bitflags v1.3.2
+│   │   │   ├── cmake v0.1.51
+│   │   │   │   └── cc v1.2.1
+│   │   │   │       └── shlex v1.3.0
+│   │   │   ├── filetime v0.2.25
+│   │   │   │   ├── cfg-if v1.0.0
+│   │   │   │   └── libc v0.2.162
+│   │   │   ├── globwalk v0.8.1
+│   │   │   │   ├── bitflags v1.3.2
+│   │   │   │   ├── ignore v0.4.23
+│   │   │   │   │   ├── crossbeam-deque v0.8.5
+│   │   │   │   │   │   ├── crossbeam-epoch v0.9.18
+│   │   │   │   │   │   │   └── crossbeam-utils v0.8.20
+│   │   │   │   │   │   └── crossbeam-utils v0.8.20
+│   │   │   │   │   ├── globset v0.4.15
+│   │   │   │   │   │   ├── aho-corasick v1.1.3 (*)
+│   │   │   │   │   │   ├── bstr v1.11.0
+│   │   │   │   │   │   │   └── memchr v2.7.4
+│   │   │   │   │   │   ├── log v0.4.22
+│   │   │   │   │   │   ├── regex-automata v0.4.9 (*)
+│   │   │   │   │   │   └── regex-syntax v0.8.5
+│   │   │   │   │   ├── log v0.4.22
+│   │   │   │   │   ├── memchr v2.7.4
+│   │   │   │   │   ├── regex-automata v0.4.9 (*)
+│   │   │   │   │   ├── same-file v1.0.6
+│   │   │   │   │   └── walkdir v2.5.0
+│   │   │   │   │       └── same-file v1.0.6
+│   │   │   │   └── walkdir v2.5.0 (*)
+│   │   │   ├── home v0.5.9
+│   │   │   ├── log v0.4.22
+│   │   │   ├── regex v1.11.1 (*)
+│   │   │   ├── remove_dir_all v0.8.4
+│   │   │   │   ├── cfg-if v1.0.0
+│   │   │   │   ├── cvt v0.1.2
+│   │   │   │   │   └── cfg-if v1.0.0
+│   │   │   │   ├── fs_at v0.2.1
+│   │   │   │   │   ├── cfg-if v1.0.0
+│   │   │   │   │   ├── cvt v0.1.2 (*)
+│   │   │   │   │   ├── libc v0.2.162
+│   │   │   │   │   └── nix v0.29.0
+│   │   │   │   │       ├── bitflags v2.6.0
+│   │   │   │   │       ├── cfg-if v1.0.0
+│   │   │   │   │       └── libc v0.2.162
+│   │   │   │   │       [build-dependencies]
+│   │   │   │   │       └── cfg_aliases v0.2.1
+│   │   │   │   ├── libc v0.2.162
+│   │   │   │   └── normpath v1.3.0
+│   │   │   ├── serde v1.0.215 (*)
+│   │   │   ├── serde_json v1.0.132 (*)
+│   │   │   ├── shlex v1.3.0
+│   │   │   ├── strum v0.24.1
+│   │   │   │   └── strum_macros v0.24.3 (proc-macro)
+│   │   │   │       ├── heck v0.4.1
+│   │   │   │       ├── proc-macro2 v1.0.89 (*)
+│   │   │   │       ├── quote v1.0.37 (*)
+│   │   │   │       ├── rustversion v1.0.18 (proc-macro)
+│   │   │   │       └── syn v1.0.109
+│   │   │   │           ├── proc-macro2 v1.0.89 (*)
+│   │   │   │           ├── quote v1.0.37 (*)
+│   │   │   │           └── unicode-ident v1.0.13
+│   │   │   ├── tempfile v3.14.0
+│   │   │   │   ├── cfg-if v1.0.0
+│   │   │   │   ├── fastrand v2.2.0
+│   │   │   │   ├── once_cell v1.20.2
+│   │   │   │   └── rustix v0.38.40 (*)
+│   │   │   ├── thiserror v1.0.69 (*)
+│   │   │   └── which v4.4.2 (*)
+│   │   ├── envy v0.4.2
+│   │   │   └── serde v1.0.215 (*)
+│   │   ├── regex v1.11.1 (*)
+│   │   ├── serde v1.0.215 (*)
+│   │   ├── strum v0.24.1 (*)
+│   │   └── which v4.4.2 (*)
+│   ├── heapless v0.8.0 (*)
+│   ├── log v0.4.22
+│   ├── nb v1.1.0
+│   └── num_enum v0.7.3
+│       └── num_enum_derive v0.7.3 (proc-macro)
+│           ├── proc-macro2 v1.0.89 (*)
+│           ├── quote v1.0.37 (*)
+│           └── syn v2.0.87 (*)
+│   [build-dependencies]
+│   └── embuild v0.32.0 (*)
+├── esp-idf-svc v0.49.1
+│   ├── embassy-futures v0.1.1
+│   ├── embassy-time-driver v0.1.0
+│   │   └── document-features v0.2.10 (proc-macro)
+│   │       └── litrs v0.4.1
+│   ├── embedded-hal-async v1.0.0 (*)
+│   ├── embedded-svc v0.28.0
+│   │   ├── embedded-io v0.6.1
+│   │   ├── embedded-io-async v0.6.1 (*)
+│   │   ├── enumset v1.1.5 (*)
+│   │   ├── heapless v0.8.0 (*)
+│   │   └── serde v1.0.215
+│   │       └── serde_derive v1.0.215 (proc-macro) (*)
+│   ├── enumset v1.1.5 (*)
+│   ├── esp-idf-hal v0.44.1 (*)
+│   ├── heapless v0.8.0 (*)
+│   ├── log v0.4.22
+│   ├── num_enum v0.7.3 (*)
+│   └── uncased v0.9.10
+│       [build-dependencies]
+│       └── version_check v0.9.5
+│   [build-dependencies]
+│   └── embuild v0.32.0 (*)
+├── esp-idf-sys v0.35.0 (*)
+├── log v0.4.22
+├── lvgl v0.6.2 (https://github.com/enelson1001/lv_binding_rust#723ad383)
+│   ├── bitflags v2.6.0
+│   ├── cstr_core v0.2.6 (*)
+│   ├── ctor v0.2.8 (proc-macro)
+│   │   ├── quote v1.0.37 (*)
+│   │   └── syn v2.0.87 (*)
+│   ├── cty v0.2.2
+│   ├── embedded-graphics v0.8.1
+│   │   ├── az v1.2.1
+│   │   ├── byteorder v1.5.0
+│   │   ├── embedded-graphics-core v0.4.0 (*)
+│   │   ├── float-cmp v0.9.0
+│   │   │   └── num-traits v0.2.19
+│   │   │       [build-dependencies]
+│   │   │       └── autocfg v1.4.0
+│   │   └── micromath v2.1.0
+│   ├── lvgl-sys v0.6.2 (https://github.com/enelson1001/lv_binding_rust#723ad383)
+│   │   └── cty v0.2.2
+│   │   [build-dependencies]
+│   │   ├── bindgen v0.65.1
+│   │   │   ├── bitflags v1.3.2
+│   │   │   ├── cexpr v0.6.0 (*)
+│   │   │   ├── clang-sys v1.8.1 (*)
+│   │   │   ├── lazy_static v1.5.0
+│   │   │   ├── lazycell v1.3.0
+│   │   │   ├── log v0.4.22
+│   │   │   ├── peeking_take_while v0.1.2
+│   │   │   ├── prettyplease v0.2.25 (*)
+│   │   │   ├── proc-macro2 v1.0.89 (*)
+│   │   │   ├── quote v1.0.37 (*)
+│   │   │   ├── regex v1.11.1 (*)
+│   │   │   ├── rustc-hash v1.1.0
+│   │   │   ├── shlex v1.3.0
+│   │   │   ├── syn v2.0.87 (*)
+│   │   │   └── which v4.4.2 (*)
+│   │   └── cc v1.2.1 (*)
+│   └── paste v1.0.15 (proc-macro)
+│   [build-dependencies]
+│   ├── lvgl-codegen v0.6.2 (https://github.com/enelson1001/lv_binding_rust#723ad383)
+│   │   ├── Inflector v0.11.4
+│   │   │   ├── lazy_static v1.5.0
+│   │   │   └── regex v1.11.1 (*)
+│   │   ├── lazy_static v1.5.0
+│   │   ├── proc-macro2 v1.0.89 (*)
+│   │   ├── quote v1.0.37 (*)
+│   │   ├── regex v1.11.1 (*)
+│   │   └── syn v2.0.87 (*)
+│   ├── lvgl-sys v0.6.2 (https://github.com/enelson1001/lv_binding_rust#723ad383)
+│   │   └── cty v0.2.2
+│   │   [build-dependencies]
+│   │   ├── bindgen v0.65.1 (*)
+│   │   └── cc v1.2.1 (*)
+│   ├── proc-macro2 v1.0.89 (*)
+│   └── quote v1.0.37 (*)
+├── lvgl-sys v0.6.2 (https://github.com/enelson1001/lv_binding_rust#723ad383) (*)
+├── mipidsi v0.8.0
+│   ├── display-interface v0.5.0
+│   ├── embedded-graphics-core v0.4.0 (*)
+│   ├── embedded-hal v1.0.0
+│   ├── heapless v0.8.0 (*)
+│   └── nb v1.1.0
+└── static_cell v2.1.0
+    └── portable-atomic v1.9.0
+[build-dependencies]
+└── embuild v0.32.0 (*)