add the ssd1306 128x64 support

examples/ch32v307/Cargo.toml

@@ -2,6 +2,9 @@
 name = "ch32v307-examples"
 version = "0.1.0"
 edition = "2021"
+[[bin]]
+name = "ch32v307-examples"
+harness = false     # do not use the built in cargo test harness -> resolve rust-analyzer errors
 
 [dependencies]
 ch32-hal = { path = "../../", features = ["ch32v307vct6", "embassy", "rt", "highcode", "time-driver-tim1"] }
@@ -29,6 +32,8 @@ display-interface-spi = "0.5.0"
 mipidsi = "0.7.1"
 embedded-graphics = "0.8.1"
 embedded-hal-bus = "0.2.0"
+# for ssd1306
+ssd1306 = "0.9"
 
 
 [profile.release]

examples/ch32v307/src/bin/i2c-ssd1306.rs

@@ -0,0 +1,78 @@
+//! I2C test with SSD1306
+//!
+//! Folowing pins are used:
+//! SDA     PB11
+//! SCL     PB10
+//!
+//! Depending on your target and the board you are using you have to change the pins.
+//!
+//! For this example you need to hook up an SSD1306 I2C display.
+//! The display will flash black and white.
+
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+#![feature(impl_trait_in_assoc_type)]
+
+use embassy_executor::Spawner;
+
+use ch32_hal as hal;
+use embedded_graphics::{
+    mono_font::{ascii::FONT_6X10, MonoTextStyleBuilder},
+    pixelcolor::BinaryColor,
+    prelude::*,
+    text::{Baseline, Text},
+};
+
+use hal::i2c::I2c;
+use hal::println;
+use hal::time::Hertz;
+use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
+
+#[panic_handler]
+fn panic(info: &core::panic::PanicInfo) -> ! {
+    let _ = println!("\n\n\n{}", info);
+    loop {}
+}
+
+#[embassy_executor::main(entry = "qingke_rt::entry")]
+async fn main(_spawner: Spawner) -> ! {
+    hal::debug::SDIPrint::enable();
+    let mut config = hal::Config::default();
+    config.rcc = hal::rcc::Config::SYSCLK_FREQ_144MHZ_HSE;
+    let p = hal::init(Default::default());
+    hal::embassy::init();
+
+    let i2c_sda = p.PB11;
+    let i2c_scl = p.PB10;
+
+    println!("init ok");
+    let i2c = I2c::new_blocking(
+        p.I2C2,
+        i2c_scl,
+        i2c_sda,
+        Hertz::khz(400),
+        Default::default(),
+    );
+
+    let interface = I2CDisplayInterface::new(i2c);
+    let mut display = Ssd1306::new(interface, DisplaySize128x64, DisplayRotation::Rotate0)
+        .into_buffered_graphics_mode();
+    display.init().unwrap();
+    let text_style = MonoTextStyleBuilder::new()
+        .font(&FONT_6X10)
+        .text_color(BinaryColor::On)
+        .build();
+
+    Text::with_baseline("Hello world!", Point::zero(), text_style, Baseline::Top)
+        .draw(&mut display)
+        .unwrap();
+
+    Text::with_baseline("Hello Rust!", Point::new(0, 16), text_style, Baseline::Top)
+        .draw(&mut display)
+        .unwrap();
+
+    display.flush().unwrap();
+
+    loop {}
+}