diff --git a/examples/rp/Cargo.toml b/examples/rp/Cargo.toml index b55b20c63..901355aeb 100644 --- a/examples/rp/Cargo.toml +++ b/examples/rp/Cargo.toml @@ -45,6 +45,7 @@ byte-slice-cast = { version = "1.2.0", default-features = false } smart-leds = "0.4.0" heapless = "0.8" usbd-hid = "0.8.1" +rand_core = "0.6.4" embedded-hal-1 = { package = "embedded-hal", version = "1.0" } embedded-hal-async = "1.0" diff --git a/examples/rp/src/bin/spi_gc9a01.rs b/examples/rp/src/bin/spi_gc9a01.rs new file mode 100644 index 000000000..d1cf23e16 --- /dev/null +++ b/examples/rp/src/bin/spi_gc9a01.rs @@ -0,0 +1,126 @@ +//! This example shows how to use SPI (Serial Peripheral Interface) in the RP2040 chip. +//! +//! Example written for a display using the GC9A01 chip. Possibly the Waveshare RP2040-LCD-1.28 +//! (https://www.waveshare.com/wiki/RP2040-LCD-1.28) + +#![no_std] +#![no_main] + +use core::cell::RefCell; + +use defmt::*; +use display_interface_spi::SPIInterface; +use embassy_embedded_hal::shared_bus::blocking::spi::SpiDeviceWithConfig; +use embassy_executor::Spawner; +use embassy_rp::clocks::RoscRng; +use embassy_rp::gpio::{Level, Output}; +use embassy_rp::spi; +use embassy_rp::spi::{Blocking, Spi}; +use embassy_sync::blocking_mutex::raw::NoopRawMutex; +use embassy_sync::blocking_mutex::Mutex; +use embassy_time::{Delay, Duration, Timer}; +use embedded_graphics::image::{Image, ImageRawLE}; +use embedded_graphics::pixelcolor::Rgb565; +use embedded_graphics::prelude::*; +use embedded_graphics::primitives::{PrimitiveStyleBuilder, Rectangle}; +use mipidsi::models::GC9A01; +use mipidsi::options::{ColorOrder, ColorInversion}; +use mipidsi::Builder; +use rand_core::RngCore; +use {defmt_rtt as _, panic_probe as _}; + +const DISPLAY_FREQ: u32 = 64_000_000; +const LCD_X_RES: i32 = 240; +const LCD_Y_RES: i32 = 240; +const FERRIS_WIDTH: u32 = 86; +const FERRIS_HEIGHT: u32 = 64; + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + let p = embassy_rp::init(Default::default()); + let mut rng = RoscRng; + + info!("Hello World!"); + + let bl = p.PIN_25; + let rst = p.PIN_12; + let display_cs = p.PIN_9; + let dcx = p.PIN_8; + let mosi = p.PIN_11; + let clk = p.PIN_10; + + // create SPI + let mut display_config = spi::Config::default(); + display_config.frequency = DISPLAY_FREQ; + display_config.phase = spi::Phase::CaptureOnSecondTransition; + display_config.polarity = spi::Polarity::IdleHigh; + + let spi: Spi<'_, _, Blocking> = Spi::new_blocking_txonly(p.SPI1, clk, mosi, display_config.clone()); + let spi_bus: Mutex = Mutex::new(RefCell::new(spi)); + + let display_spi = SpiDeviceWithConfig::new(&spi_bus, Output::new(display_cs, Level::High), display_config); + let dcx = Output::new(dcx, Level::Low); + let rst = Output::new(rst, Level::Low); + // dcx: 0 = command, 1 = data + + // Enable LCD backlight + let _bl = Output::new(bl, Level::High); + + // display interface abstraction from SPI and DC + let di = SPIInterface::new(display_spi, dcx); + + // Define the display from the display interface and initialize it + let mut display = Builder::new(GC9A01, di) + .display_size(240, 240) + .reset_pin(rst) + .color_order(ColorOrder::Bgr) + .invert_colors(ColorInversion::Inverted) + .init(&mut Delay) + .unwrap(); + display.clear(Rgb565::BLACK).unwrap(); + + let raw_image_data = ImageRawLE::new(include_bytes!("../../assets/ferris.raw"), FERRIS_WIDTH); + let mut ferris = Image::new(&raw_image_data, Point::zero()); + + let r = rng.next_u32(); + let mut delta = Point { + x: ((r % 10) + 5) as i32, + y: (((r >> 8) % 10) + 5) as i32, + }; + loop { + // Move Ferris + let bb = ferris.bounding_box(); + let tl = bb.top_left; + let br = bb.bottom_right().unwrap(); + if tl.x < 0 || br.x > LCD_X_RES { + delta.x = -delta.x; + } + if tl.y < 0 || br.y > LCD_Y_RES { + delta.y = -delta.y; + } + + // Erase ghosting + let style = PrimitiveStyleBuilder::new().fill_color(Rgb565::BLACK).build(); + let mut off = Point { x: 0, y: 0 }; + if delta.x < 0 { + off.x = FERRIS_WIDTH as i32; + } + Rectangle::new(tl + off, Size::new(delta.x as u32, FERRIS_HEIGHT)) + .into_styled(style) + .draw(&mut display) + .unwrap(); + off = Point { x: 0, y: 0 }; + if delta.y < 0 { + off.y = FERRIS_HEIGHT as i32; + } + Rectangle::new(tl + off, Size::new(FERRIS_WIDTH, delta.y as u32)) + .into_styled(style) + .draw(&mut display) + .unwrap(); + // Translate Ferris + ferris.translate_mut(delta); + // Display the image + ferris.draw(&mut display).unwrap(); + Timer::after(Duration::from_millis(50)).await; + } +}