I2c Async (#50)

* I2c Async

Signed-off-by: Felipe Balbi <[email protected]>

* Fix i2c read bug

Signed-off-by: Felipe Balbi <[email protected]>

* Introduce wait_for()

Signed-off-by: Felipe Balbi <[email protected]>

* Review comments

Signed-off-by: Felipe Balbi <[email protected]>

* more review comments

Signed-off-by: Felipe Balbi <[email protected]>

* review comments

Signed-off-by: Felipe Balbi <[email protected]>

* review comments

Signed-off-by: Felipe Balbi <[email protected]>

* convert async fn to impl Future

Signed-off-by: Felipe Balbi <[email protected]>

---------

Signed-off-by: Felipe Balbi <[email protected]>
Co-authored-by: Felipe Balbi <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/examples/src/bin/i2c-async.rs b/examples/src/bin/i2c-async.rs
new file mode 100644
index 000000000..47b5f3cbe
--- /dev/null
+++ b/examples/src/bin/i2c-async.rs
@@ -0,0 +1,39 @@
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+use embassy_time::Timer;
+use hal::bind_interrupts;
+use hal::clocks::config::Div8;
+use hal::config::Config;
+use hal::i2c::controller::{self, I2c, Speed};
+use hal::i2c::InterruptHandler;
+use hal::peripherals::LPI2C3;
+use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
+
+bind_interrupts!(
+    struct Irqs {
+        LPI2C3 => InterruptHandler<LPI2C3>;
+    }
+);
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut config = Config::default();
+    config.clock_cfg.sirc.fro_lf_div = Div8::from_divisor(1);
+
+    let p = hal::init(config);
+
+    defmt::info!("I2C example");
+
+    let mut config = controller::Config::default();
+    config.speed = Speed::Standard;
+    let mut i2c = I2c::new_async(p.LPI2C3, p.P3_27, p.P3_28, Irqs, config).unwrap();
+    let mut buf = [0u8; 2];
+
+    loop {
+        i2c.async_write_read(0x48, &[0x00], &mut buf).await.unwrap();
+        defmt::info!("Buffer: {:02x}", buf);
+        Timer::after_secs(1).await;
+    }
+}