swaitsandClaude Opus 4.6
3102fc747a
Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
123 lines
3.0 KiB
Rust
123 lines
3.0 KiB
Rust
//! Draw a square, circle and triangle on the screen using the `embedded_graphics` crate.
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//!
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//! This example is for the STM32F103 "Blue Pill" board using I2C1.
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//!
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//! Wiring connections are as follows for a CRIUS-branded display:
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//!
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//! ```
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//! Display -> Blue Pill
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//! (black) GND -> GND
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//! (red) +5V -> VCC
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//! (yellow) SDA -> PB7
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//! (green) SCL -> PB6
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//! ```
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//!
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//! Run on a Blue Pill with `cargo run --example graphics_i2c`.
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#![no_std]
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#![no_main]
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use cortex_m::asm::nop;
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use cortex_m_rt::entry;
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use defmt_rtt as _;
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use embassy_stm32::time::Hertz;
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#[cfg(feature = "async")]
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use embassy_stm32::{bind_interrupts, i2c, peripherals};
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use embedded_graphics::{
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pixelcolor::BinaryColor,
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prelude::*,
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primitives::{Circle, PrimitiveStyleBuilder, Rectangle, Triangle},
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};
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use panic_probe as _;
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use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
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#[entry]
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fn main() -> ! {
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let p = embassy_stm32::init(Default::default());
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#[cfg(feature = "async")]
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bind_interrupts!(struct Irqs {
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I2C1_EV => i2c::EventInterruptHandler<peripherals::I2C1>;
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I2C1_ER => i2c::ErrorInterruptHandler<peripherals::I2C1>;
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});
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#[cfg(feature = "async")]
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let i2c = embassy_stm32::i2c::I2c::new(
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p.I2C1,
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p.PB6,
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p.PB7,
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Irqs,
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p.DMA1_CH6,
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p.DMA1_CH7,
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Hertz::khz(400),
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Default::default(),
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);
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#[cfg(not(feature = "async"))]
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let i2c = embassy_stm32::i2c::I2c::new_blocking(
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p.I2C1,
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p.PB6,
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p.PB7,
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Hertz::khz(400),
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Default::default(),
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);
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let interface = I2CDisplayInterface::new(i2c);
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let mut display = Ssd1306::new(interface, DisplaySize72x40, DisplayRotation::Rotate0)
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.into_buffered_graphics_mode();
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display.init().unwrap();
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let size = 10;
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let offset = Point::new(10, (42 / 2) - (size / 2) - 1);
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let spacing = size + 10;
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let style = PrimitiveStyleBuilder::new()
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.stroke_width(1)
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.stroke_color(BinaryColor::On)
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.build();
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// screen outline
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// default display size is 128x64 if you don't pass a _DisplaySize_
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// enum to the _Builder_ struct
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Rectangle::with_corners(Point::new(0, 0), Point::new(71, 39))
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.into_styled(style)
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.draw(&mut display)
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.unwrap();
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// Triangle
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Triangle::new(
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Point::new(0, size),
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Point::new(size / 2, 0),
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Point::new(size, size),
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)
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.translate(offset)
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.into_styled(style)
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.draw(&mut display)
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.unwrap();
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// Move over to next position
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let offset = offset + Point::new(spacing, 0);
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// Draw a square
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Rectangle::new(Point::new(0, 0), Size::new_equal(size as u32))
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.translate(offset)
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.into_styled(style)
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.draw(&mut display)
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.unwrap();
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// Move over a bit more
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let offset = offset + Point::new(spacing, 0);
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// Circle
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Circle::new(Point::zero(), size as u32)
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.translate(offset)
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.into_styled(style)
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.draw(&mut display)
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.unwrap();
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display.flush().unwrap();
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loop {
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nop()
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}
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}
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