Merge pull request #4435 from bespsm/mspm0-i2c

MSPM0: Add I2C Controller (blocking & async) + examples for mspm0l1306, mspm0g3507 (tested MCUs)

1 files changed, 45 insertions, 0 deletions

diff --git a/examples/mspm0g3507/src/bin/i2c.rs b/examples/mspm0g3507/src/bin/i2c.rs
new file mode 100644
index 000000000..8d1ed1726
--- /dev/null
+++ b/examples/mspm0g3507/src/bin/i2c.rs
@@ -0,0 +1,45 @@
+//! This example uses FIFO with polling, and the maximum FIFO size is 8.
+//! Refer to async example to handle larger packets.
+//!
+//! This example controls AD5171 digital potentiometer via I2C with the LP-MSPM0G3507 board.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_mspm0::i2c::{Config, I2c};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_halt as _};
+
+const ADDRESS: u8 = 0x6a;
+
+#[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 i2c = unwrap!(I2c::new_blocking(instance, scl, sda, Config::default()));
+
+    let mut pot_value: u8 = 0;
+
+    loop {
+        let to_write = [0u8, pot_value];
+
+        match i2c.blocking_write(ADDRESS, &to_write) {
+            Ok(()) => info!("New potentioemter value: {}", pot_value),
+            Err(e) => error!("I2c Error: {:?}", e),
+        }
+
+        pot_value += 1;
+        // if reached 64th position (max)
+        // start over from lowest value
+        if pot_value == 64 {
+            pot_value = 0;
+        }
+        Timer::after_millis(500).await;
+    }
+}