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esp32-s3-lcd-ev-board clean up implementation

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Juraj Michálek 2025-07-14 10:28:34 +02:00 • committed by Simon Hausmann
parent 7ff648c41e
commit bb23ed15e3
1 changed files with 10 additions and 53 deletions
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63
examples/mcu-board-support/esp32_s3_lcd_ev_board.rs
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@ -1,6 +1,6 @@
// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: MIT
//! Board support for ESP32-S3-LCD-EV-Board using the same init sequence as Conway's Game of Life example.
//! Board support for ESP32-S3-LCD-EV-Board with display and touch controller support.
extern crate alloc;
@ -41,10 +41,6 @@ where
}
use alloc::boxed::Box;
use embedded_graphics_core::pixelcolor::Rgb565;
use embedded_graphics_core::pixelcolor::{IntoStorage, RgbColor};
use embedded_graphics_core::prelude::PixelColor;
use embedded_graphics_framebuf::backends::FrameBufferBackend;
use esp_hal::dma::{DmaDescriptor, DmaTxBuf, CHUNK_SIZE};
use esp_hal::i2c;
use esp_hal::peripherals::Peripherals;
@ -91,44 +87,6 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
loop {}
}
/// A wrapper around a boxed array that implements FrameBufferBackend.
pub struct HeapBuffer<C: PixelColor, const N: usize>(Box<[C; N]>);
impl<C: PixelColor, const N: usize> HeapBuffer<C, N> {
pub fn new(data: Box<[C; N]>) -> Self {
Self(data)
}
pub fn as_slice(&self) -> &[C] {
self.0.as_ref()
}
}
impl<C: PixelColor, const N: usize> core::ops::Deref for HeapBuffer<C, N> {
type Target = [C; N];
fn deref(&self) -> &Self::Target {
&*self.0
}
}
impl<C: PixelColor, const N: usize> core::ops::DerefMut for HeapBuffer<C, N> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut *self.0
}
}
impl<C: PixelColor, const N: usize> FrameBufferBackend for HeapBuffer<C, N> {
type Color = C;
fn set(&mut self, index: usize, color: Self::Color) {
self.0[index] = color;
}
fn get(&self, index: usize) -> Self::Color {
self.0[index]
}
fn nr_elements(&self) -> usize {
N
}
}
struct EspBackend {
window: RefCell<Option<Rc<slint::platform::software_renderer::MinimalSoftwareWindow>>>,
@ -315,16 +273,15 @@ impl slint::platform::Platform for EspBackend {
let mut pixel_box: Box<[Rgb565Pixel; FRAME_PIXELS]> =
Box::new([Rgb565Pixel(0); FRAME_PIXELS]);
let pixel_buf: &mut [Rgb565Pixel] = &mut *pixel_box;
// Clear screen to blue for sanity check
{
let dst = dma_tx.as_mut_slice();
let [blue_lo, blue_hi] = Rgb565::BLUE.into_storage().to_le_bytes();
for pixel in 0..FRAME_PIXELS {
dst[2 * pixel] = blue_lo;
dst[2 * pixel + 1] = blue_hi;
}
// Initialize pixel buffer and DMA buffer
// The pixel buffer will be filled by Slint's renderer in the main loop
let dst = dma_tx.as_mut_slice();
for (i, px) in pixel_buf.iter().enumerate() {
let [lo, hi] = px.0.to_le_bytes();
dst[2 * i] = lo;
dst[2 * i + 1] = hi;
}
// Initial flush of the blue screen
// Initial flush of the screen buffer
match dpi.send(false, dma_tx) {
Ok(xfer) => {
let (_res, dpi2, tx2) = xfer.wait();
@ -443,7 +400,7 @@ impl Tca9554 {
}
}
// Initialization commands matching the Conway example
// Display initialization commands for the ESP32-S3-LCD-EV-Board
#[derive(Copy, Clone, Debug)]
enum InitCmd {
Cmd(u8, &'static [u8]),