rename `rp23` (?) folder to `rp235x`; fix `ci.sh` to use `rp235x` folder

1 files changed, 177 insertions, 0 deletions

diff --git a/examples/rp235x/src/bin/spi_display.rs b/examples/rp235x/src/bin/spi_display.rs
new file mode 100644
index 000000000..9c524ab25
--- /dev/null
+++ b/examples/rp235x/src/bin/spi_display.rs
@@ -0,0 +1,177 @@
+//! This example shows how to use SPI (Serial Peripheral Interface) in the RP2350 chip.
+//!
+//! Example written for a display using the ST7789 chip. Possibly the Waveshare Pico-ResTouch
+//! (https://www.waveshare.com/wiki/Pico-ResTouch-LCD-2.8)
+
+#![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::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;
+use embedded_graphics::image::{Image, ImageRawLE};
+use embedded_graphics::mono_font::ascii::FONT_10X20;
+use embedded_graphics::mono_font::MonoTextStyle;
+use embedded_graphics::pixelcolor::Rgb565;
+use embedded_graphics::prelude::*;
+use embedded_graphics::primitives::{PrimitiveStyleBuilder, Rectangle};
+use embedded_graphics::text::Text;
+use mipidsi::models::ST7789;
+use mipidsi::options::{Orientation, Rotation};
+use mipidsi::Builder;
+use {defmt_rtt as _, panic_probe as _};
+
+use crate::touch::Touch;
+
+const DISPLAY_FREQ: u32 = 64_000_000;
+const TOUCH_FREQ: u32 = 200_000;
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    info!("Hello World!");
+
+    let bl = p.PIN_13;
+    let rst = p.PIN_15;
+    let display_cs = p.PIN_9;
+    let dcx = p.PIN_8;
+    let miso = p.PIN_12;
+    let mosi = p.PIN_11;
+    let clk = p.PIN_10;
+    let touch_cs = p.PIN_16;
+    //let touch_irq = p.PIN_17;
+
+    // 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 mut touch_config = spi::Config::default();
+    touch_config.frequency = TOUCH_FREQ;
+    touch_config.phase = spi::Phase::CaptureOnSecondTransition;
+    touch_config.polarity = spi::Polarity::IdleHigh;
+
+    let spi: Spi<'_, _, Blocking> = Spi::new_blocking(p.SPI1, clk, mosi, miso, touch_config.clone());
+    let spi_bus: Mutex<NoopRawMutex, _> = Mutex::new(RefCell::new(spi));
+
+    let display_spi = SpiDeviceWithConfig::new(&spi_bus, Output::new(display_cs, Level::High), display_config);
+    let touch_spi = SpiDeviceWithConfig::new(&spi_bus, Output::new(touch_cs, Level::High), touch_config);
+
+    let mut touch = Touch::new(touch_spi);
+
+    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(ST7789, di)
+        .display_size(240, 320)
+        .reset_pin(rst)
+        .orientation(Orientation::new().rotate(Rotation::Deg90))
+        .init(&mut Delay)
+        .unwrap();
+    display.clear(Rgb565::BLACK).unwrap();
+
+    let raw_image_data = ImageRawLE::new(include_bytes!("../../assets/ferris.raw"), 86);
+    let ferris = Image::new(&raw_image_data, Point::new(34, 68));
+
+    // Display the image
+    ferris.draw(&mut display).unwrap();
+
+    let style = MonoTextStyle::new(&FONT_10X20, Rgb565::GREEN);
+    Text::new(
+        "Hello embedded_graphics \n + embassy + RP2040!",
+        Point::new(20, 200),
+        style,
+    )
+    .draw(&mut display)
+    .unwrap();
+
+    loop {
+        if let Some((x, y)) = touch.read() {
+            let style = PrimitiveStyleBuilder::new().fill_color(Rgb565::BLUE).build();
+
+            Rectangle::new(Point::new(x - 1, y - 1), Size::new(3, 3))
+                .into_styled(style)
+                .draw(&mut display)
+                .unwrap();
+        }
+    }
+}
+
+/// Driver for the XPT2046 resistive touchscreen sensor
+mod touch {
+    use embedded_hal_1::spi::{Operation, SpiDevice};
+
+    struct Calibration {
+        x1: i32,
+        x2: i32,
+        y1: i32,
+        y2: i32,
+        sx: i32,
+        sy: i32,
+    }
+
+    const CALIBRATION: Calibration = Calibration {
+        x1: 3880,
+        x2: 340,
+        y1: 262,
+        y2: 3850,
+        sx: 320,
+        sy: 240,
+    };
+
+    pub struct Touch<SPI: SpiDevice> {
+        spi: SPI,
+    }
+
+    impl<SPI> Touch<SPI>
+    where
+        SPI: SpiDevice,
+    {
+        pub fn new(spi: SPI) -> Self {
+            Self { spi }
+        }
+
+        pub fn read(&mut self) -> Option<(i32, i32)> {
+            let mut x = [0; 2];
+            let mut y = [0; 2];
+            self.spi
+                .transaction(&mut [
+                    Operation::Write(&[0x90]),
+                    Operation::Read(&mut x),
+                    Operation::Write(&[0xd0]),
+                    Operation::Read(&mut y),
+                ])
+                .unwrap();
+
+            let x = (u16::from_be_bytes(x) >> 3) as i32;
+            let y = (u16::from_be_bytes(y) >> 3) as i32;
+
+            let cal = &CALIBRATION;
+
+            let x = ((x - cal.x1) * cal.sx / (cal.x2 - cal.x1)).clamp(0, cal.sx);
+            let y = ((y - cal.y1) * cal.sy / (cal.y2 - cal.y1)).clamp(0, cal.sy);
+            if x == 0 && y == 0 {
+                None
+            } else {
+                Some((x, y))
+            }
+        }
+    }
+}