mspm0-i2c-target: add i2c target with example

1 files changed, 60 insertions, 0 deletions

diff --git a/examples/mspm0g3507/src/bin/i2c_target.rs b/examples/mspm0g3507/src/bin/i2c_target.rs
new file mode 100644
index 000000000..b1336cdd2
--- /dev/null
+++ b/examples/mspm0g3507/src/bin/i2c_target.rs
@@ -0,0 +1,60 @@
+//! Example of using blocking I2C
+//!
+//! This uses the virtual COM port provided on the LP-MSPM0G3507 board.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_mspm0::i2c_target::{Command, I2cTarget, ReadStatus};
+use embassy_mspm0::peripherals::I2C1;
+use embassy_mspm0::{bind_interrupts, i2c};
+use {defmt_rtt as _, panic_halt as _};
+
+bind_interrupts!(struct Irqs {
+    I2C1 => i2c::InterruptHandler<I2C1>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    let p = embassy_mspm0::init(Default::default());
+
+    let instance = p.I2C1;
+    let scl = p.PB2;
+    let sda = p.PB3;
+
+    let mut config = i2c::Config::default();
+    config.general_call = true;
+    let mut i2c = I2cTarget::new(instance, scl, sda, Irqs, config).unwrap();
+
+    let mut read = [0u8; 8];
+    let data = [8u8; 2];
+    let data_wr = [9u8; 2];
+
+    loop {
+        match i2c.listen(&mut read).await {
+            Ok(Command::GeneralCall(_)) => info!("General call received"),
+            Ok(Command::Read) => {
+                info!("Read command received");
+                match i2c.respond_to_read(&data).await.unwrap() {
+                    ReadStatus::Done => info!("Finished reading"),
+                    ReadStatus::NeedMoreBytes => {
+                        info!("Read needs more bytes - will reset");
+                        i2c.reset().unwrap();
+                    }
+                    ReadStatus::LeftoverBytes(_) => {
+                        info!("Leftover bytes received");
+                        i2c.flush_tx_fifo();
+                    }
+                }
+            }
+            Ok(Command::Write(_)) => info!("Write command received"),
+            Ok(Command::WriteRead(_)) => {
+                info!("Write-Read command received");
+                i2c.respond_and_fill(&data_wr, 0xFE).await.unwrap();
+            }
+            Err(e) => info!("Got error {}", e),
+        }
+    }
+}