pimoroni display pack 2 example

boards/rp-pico/Cargo.toml

@@ -33,6 +33,8 @@ ws2812-pio = "0.4.0"
 ssd1306 = "0.7.0"
 embedded-graphics = "0.7.1"
 hd44780-driver = "0.4.0"
+st7789 = "0.6.1"
+display-interface-spi = "0.4.1"
 pio = "0.2.0"
 pio-proc = "0.2.1"
 critical-section = "1.0.0"

boards/rp-pico/examples/pico_display_pack_2.rs

@@ -0,0 +1,170 @@
+//! # Pimoroni Display Pack 2.0 Example
+//!
+//! This example makes use of the [Pimoroni Display Pack 2.0](https://shop.pimoroni.com/products/pico-display-pack-2-0?variant=39374122582099)
+//!
+//! It will demonstrate how to draw on the screen using the embedded_graphics API
+//!
+//! See the `Cargo.toml` file for Copyright and license details.
+
+#![no_std]
+#![no_main]
+
+// The macro for our start-up function
+use rp_pico::entry;
+
+// Time handling traits
+use fugit::RateExtU32;
+
+// Ensure we halt the program on panic (if we don't mention this crate it won't
+// be linked)
+use panic_halt as _;
+
+// Pull in any important traits
+use rp_pico::hal::prelude::*;
+
+// A shorter alias for the Peripheral Access Crate, which provides low-level
+// register access
+use rp_pico::hal::pac;
+
+// A shorter alias for the Hardware Abstraction Layer, which provides
+// higher-level drivers.
+use rp_pico::hal;
+
+// ST7789 driver
+use st7789::{Orientation, ST7789};
+
+// SPI display interface
+use display_interface_spi::SPIInterface;
+
+// Graphics drawing utilities
+use embedded_graphics::pixelcolor::Rgb565;
+use embedded_graphics::prelude::*;
+use embedded_graphics::primitives::*;
+
+// GPIO traits
+use embedded_hal::digital::v2::OutputPin;
+use embedded_hal::PwmPin;
+
+/// External high-speed crystal on the Raspberry Pi Pico board is 12 MHz. Adjust
+/// if your board has a different frequency
+const XTAL_FREQ_HZ: u32 = 12_000_000u32;
+
+#[entry]
+fn main() -> ! {
+    // Grab our singleton objects
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+
+    // Set up the watchdog driver - needed by the clock setup code
+    let mut watchdog = hal::Watchdog::new(pac.WATCHDOG);
+
+    // Configure the clocks
+    let clocks = hal::clocks::init_clocks_and_plls(
+        XTAL_FREQ_HZ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+
+    let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
+
+    // The single-cycle I/O block controls our GPIO pins
+    let sio = hal::Sio::new(pac.SIO);
+
+    // Set the pins up according to their function on this particular board
+    let pins = rp_pico::Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    // Init PWMs
+    let mut pwm_slices = hal::pwm::Slices::new(pac.PWM, &mut pac.RESETS);
+
+    // Configure and enable PWMs
+    let pwm3 = &mut pwm_slices.pwm3;
+    pwm3.set_ph_correct();
+    pwm3.enable();
+    let pwm4 = &mut pwm_slices.pwm4;
+    pwm4.set_ph_correct();
+    pwm4.enable();
+
+    // Configure button inputs
+    // 12 - A button
+    let _a_pin = pins.gpio12.into_pull_up_input();
+    // 13 - B button
+    let _b_pin = pins.gpio13.into_pull_up_input();
+    // 14 - X button
+    let _x_pin = pins.gpio14.into_pull_up_input();
+    // 15 - Y button
+    let _y_pin = pins.gpio15.into_pull_up_input();
+
+    // 6 (PWM 3A) - LED red
+    let r_channel = &mut pwm3.channel_a;
+    r_channel.output_to(pins.gpio6);
+    r_channel.set_inverted();
+    r_channel.set_duty(0);
+    // 7 (PWM 3B) - LED green
+    let g_channel = &mut pwm3.channel_b;
+    g_channel.output_to(pins.gpio7);
+    g_channel.set_inverted();
+    g_channel.set_duty(0);
+    // 8 (PWM 4A) - LED blue
+    let b_channel = &mut pwm4.channel_a;
+    b_channel.output_to(pins.gpio8);
+    b_channel.set_inverted();
+    b_channel.set_duty(0);
+
+    // 20 - LCD backlight
+    pins.gpio20.into_push_pull_output().set_high().unwrap();
+
+    // 22 - LCD hard reset
+    let mut rst_pin = pins.gpio22.into_push_pull_output();
+    rst_pin.set_low().unwrap();
+
+    // Setup SPI
+    let spi_cs = pins.gpio17.into_push_pull_output();
+    let spi_miso = pins.gpio16.into_push_pull_output();
+    let _spi_sclk = pins.gpio18.into_mode::<hal::gpio::FunctionSpi>();
+    let _spi_mosi = pins.gpio19.into_mode::<hal::gpio::FunctionSpi>();
+
+    let spi = hal::Spi::<_, _, 8>::new(pac.SPI0);
+
+    // Exchange the uninitialised SPI driver for an initialised one
+    let spi = spi.init(
+        &mut pac.RESETS,
+        clocks.peripheral_clock.freq(),
+        16_000_000u32.Hz(),
+        &embedded_hal::spi::MODE_0,
+    );
+
+    // display interface abstraction from SPI and DC
+    let di = SPIInterface::new(spi, spi_miso, spi_cs);
+
+    // create driver
+    let mut display = ST7789::new(di, rst_pin, 320, 240);
+
+    // initialize
+    display.init(&mut delay).unwrap();
+
+    // set default orientation
+    display.set_orientation(Orientation::Landscape).unwrap();
+
+    // create a filled circle
+    let circle =
+        Circle::new(Point::new(100, 60), 120).into_styled(PrimitiveStyle::with_fill(Rgb565::RED));
+
+    // draw the circle on a black background
+    display.clear(Rgb565::BLACK).unwrap();
+    circle.draw(&mut display).unwrap();
+
+    loop {
+        cortex_m::asm::wfi();
+    }
+}