daisy 0.11.0

A board support package for the Electro-Smith Daisy Seed and Patch SM
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//! Example of interfacing with an external OLED display.

#![no_main]
#![no_std]

use cortex_m_rt::entry;

#[cfg(not(feature = "defmt"))]
use panic_halt as _;
#[cfg(feature = "defmt")]
use {defmt_rtt as _, panic_probe as _};

use hal::prelude::*;
use hal::{delay::DelayFromCountDownTimer, spi};
use stm32h7xx_hal as hal;

use embedded_graphics::{
    pixelcolor::BinaryColor,
    prelude::*,
    primitives::{Circle, PrimitiveStyle, Rectangle},
};
use fugit::RateExtU32;
use ssd1306::{Ssd1306, prelude::*};

#[entry]
fn main() -> ! {
    // Get device peripherals and the board abstraction.
    let board = daisy::Board::take().unwrap();
    let dp = daisy::pac::Peripherals::take().unwrap();

    // Configure board's peripherals.
    let ccdr = daisy::board_freeze_clocks!(board, dp);
    let pins = daisy::board_split_gpios!(board, ccdr, dp);

    // Configure the display.
    //
    // This example uses 128x64 display connected via 4-wire SPI. The pin
    // mapping is:
    //
    // | Interface role | Display label | Seed pin | Patch SM pin |
    // |----------------|---------------|----------|--------------|
    // | SCK            | CLK           | 9        | D10          |
    // | CS             | CS            | 8        | D1           |
    // | MOSI           | DIN           | 11       | D9           |
    // | RST            | RES           | 37       | A9           |
    // | DC             | D/C           | 10       | D8           |
    let mut display = {
        // Select the pins depending on the used board.
        #[cfg(any(feature = "seed", feature = "seed_1_1", feature = "seed_1_2"))]
        let pins = (
            pins.GPIO.PIN_8.into_alternate(),
            pins.GPIO.PIN_7.into_push_pull_output(),
            pins.GPIO.PIN_10.into_alternate(),
            pins.GPIO.PIN_30.into_push_pull_output(),
            pins.GPIO.PIN_9.into_push_pull_output(),
        );
        #[cfg(feature = "patch_sm")]
        let pins = (
            pins.GPIO.PIN_D10.into_alternate(),
            pins.GPIO.PIN_D1.into_push_pull_output(),
            pins.GPIO.PIN_D9.into_alternate(),
            pins.GPIO.PIN_A9.into_push_pull_output(),
            pins.GPIO.PIN_D8.into_push_pull_output(),
        );
        let (sck, cs, mosi, mut rst, dc) = pins;

        // Initialize SPI, selecting the right peripheral depending on the used
        // board.
        #[cfg(any(feature = "seed", feature = "seed_1_1", feature = "seed_1_2"))]
        let spi = dp.SPI1.spi(
            (sck, spi::NoMiso, mosi),
            spi::MODE_0,
            3.MHz(),
            ccdr.peripheral.SPI1,
            &ccdr.clocks,
        );
        #[cfg(feature = "patch_sm")]
        let spi = dp.SPI2.spi(
            (sck, spi::NoMiso, mosi),
            spi::MODE_0,
            3.MHz(),
            ccdr.peripheral.SPI2,
            &ccdr.clocks,
        );

        // Configure the display interface and its driver.
        let interface = display_interface_spi::SPIInterface::new(spi, dc, cs);
        let mut display = Ssd1306::new(interface, DisplaySize128x64, DisplayRotation::Rotate0)
            .into_buffered_graphics_mode();
        let mut delay = DelayFromCountDownTimer::new(dp.TIM2.timer(
            100.Hz(),
            ccdr.peripheral.TIM2,
            &ccdr.clocks,
        ));
        display.reset(&mut rst, &mut delay).unwrap();
        display.init().unwrap();

        display
    };

    // Draw basic shapes on the display.
    let one_second = ccdr.clocks.sys_ck().to_Hz();
    loop {
        Rectangle::new(Point::new(0, 0), Size::new(127, 63))
            .into_styled(PrimitiveStyle::with_fill(BinaryColor::Off))
            .draw(&mut display)
            .unwrap();
        Circle::new(Point::new(39, 7), 51)
            .into_styled(PrimitiveStyle::with_fill(BinaryColor::On))
            .draw(&mut display)
            .unwrap();
        display.flush().unwrap();
        cortex_m::asm::delay(2 * one_second);

        Rectangle::new(Point::new(0, 0), Size::new(127, 63))
            .into_styled(PrimitiveStyle::with_fill(BinaryColor::On))
            .draw(&mut display)
            .unwrap();
        Circle::new(Point::new(39, 7), 51)
            .into_styled(PrimitiveStyle::with_fill(BinaryColor::Off))
            .draw(&mut display)
            .unwrap();
        display.flush().unwrap();
        cortex_m::asm::delay(2 * one_second);
    }
}