enhance: add async i2c demo

examples/ch32v307/src/bin/i2c-bmp180-async.rs

@@ -0,0 +1,71 @@
+//! 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)]
+#![feature(naked_functions)]
+
+use ch32_hal as hal;
+use embassy_executor::Spawner;
+use embassy_time::{Delay, Timer};
+use hal::i2c::I2c;
+use hal::time::Hertz;
+use hal::{bind_interrupts, println};
+use hal::peripherals;
+
+bind_interrupts!(struct Irqs {
+    I2C2_EV => hal::i2c::EventInterruptHandler<peripherals::I2C2>;
+    I2C2_ER => hal::i2c::ErrorInterruptHandler<peripherals::I2C2>;
+});
+
+#[panic_handler]
+fn panic(info: &core::panic::PanicInfo) -> ! {
+    let _ = println!("\n\n\n{}", info);
+    loop {}
+}
+
+#[embassy_executor::main(entry = "ch32_hal::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(
+        p.I2C2,
+        i2c_scl,
+        i2c_sda,
+        Irqs,
+        p.DMA1_CH4,
+        p.DMA1_CH5,
+        Hertz::khz(400),
+        Default::default(),
+    );
+
+    let mut sensor = edrv_bmp180::BMP180::new_primary(i2c);
+
+    sensor.init(Default::default()).await.unwrap();
+
+    loop {
+        let m = sensor.read_measurement(&mut Delay).await.unwrap();
+
+        println!("Measurement: {:?}", m);
+
+        Timer::after_secs(1).await;
+    }
+}

examples/ch32v307/src/bin/i2c-bmp180.rs

@@ -0,0 +1,55 @@
+//! 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 ch32_hal as hal;
+use embassy_executor::Spawner;
+use embassy_time::{Delay, Timer};
+use hal::i2c::I2c;
+use hal::println;
+use hal::time::Hertz;
+
+#[panic_handler]
+fn panic(info: &core::panic::PanicInfo) -> ! {
+    let _ = println!("\n\n\n{}", info);
+    loop {}
+}
+
+#[embassy_executor::main(entry = "ch32_hal::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 mut sensor = edrv_bmp180::blocking::BMP180::new_primary(i2c);
+
+    sensor.init(Default::default()).unwrap();
+
+    loop {
+        let m = sensor.read_measurement(&mut Delay).unwrap();
+
+        println!("Measurement: {:?}", m);
+
+        Timer::after_secs(1).await;
+    }
+}