mspm0: blocking uart driver

examples/mspm0c1104/Cargo.toml

@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-mspm0 = { version = "0.1.0", path = "../../embassy-mspm0", features = ["mspm0c110x", "rt", "time-driver-any"] }
+embassy-mspm0 = { version = "0.1.0", path = "../../embassy-mspm0", features = ["mspm0c110x", "defmt", "rt", "time-driver-any"] }
 embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt"] }
 embassy-sync = { version = "0.6.2", path = "../../embassy-sync", features = ["defmt"] }
 embassy-time = { version = "0.4.0", path = "../../embassy-time", features = ["defmt"] }

examples/mspm0c1104/src/bin/uart.rs

@@ -0,0 +1,35 @@
+//! Example of using blocking uart
+//!
+//! This uses the virtual COM port provided on the LP-MSPM0C1104 board.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_mspm0::uart::{Config, Uart};
+use {defmt_rtt as _, panic_halt as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    info!("Hello world!");
+
+    let p = embassy_mspm0::init(Default::default());
+
+    let instance = p.UART0;
+    let tx = p.PA27;
+    let rx = p.PA26;
+
+    let config = Config::default();
+    let mut uart = unwrap!(Uart::new_blocking(instance, rx, tx, config));
+
+    unwrap!(uart.blocking_write(b"Hello Embassy World!\r\n"));
+    info!("wrote Hello, starting echo");
+
+    let mut buf = [0u8; 1];
+
+    loop {
+        unwrap!(uart.blocking_read(&mut buf));
+        unwrap!(uart.blocking_write(&buf));
+    }
+}