add spi_display with mipidsi example for rp pico

examples/rp/Cargo.toml

@@ -33,14 +33,16 @@ cortex-m = { version = "0.7.6", features = ["inline-asm"] }
 cortex-m-rt = "0.7.0"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
 futures = { version = "0.3.17", default-features = false, features = ["async-await", "cfg-target-has-atomic", "unstable"] }
+mipidsi = { version = "0.7.1", git = "https://github.com/almindor/mipidsi.git" }
 display-interface-spi = "0.4.1"
-embedded-graphics = "0.7.1"
+embedded-graphics = "0.8.0"
 st7789 = "0.6.1"
 display-interface = "0.4.1"
 byte-slice-cast = { version = "1.2.0", default-features = false }
 smart-leds = "0.3.0"
 heapless = "0.7.15"
 usbd-hid = "0.6.1"
+rand_core = "0.6.4"
 
 embedded-hal-1 = { package = "embedded-hal", version = "=1.0.0-alpha.11" }
 embedded-hal-async = "0.2.0-alpha.2"

examples/rp/src/bin/spi_gc9a01.rs

@@ -0,0 +1,119 @@
+//! 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]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use display_interface_spi::SPIInterface;
+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_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::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 display_cs = Output::new(display_cs, Level::High);
+    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(spi, dcx, display_cs);
+
+    // Define the display from the display interface and initialize it
+    let mut display = Builder::gc9a01(di)
+        .with_display_size(240, 240)
+        .with_color_order(mipidsi::ColorOrder::Bgr)
+        .with_invert_colors(mipidsi::ColorInversion::Inverted)
+        .init(&mut Delay, Some(rst))
+        .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;
+    }
+}