feat: SAI example

examples/stm32h5/src/bin/sai.rs

@@ -0,0 +1,53 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+
+use embassy_stm32::{sai, Config};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    info!("Hello world.");
+
+    let mut config = Config::default();
+    {
+        use embassy_stm32::rcc::*;
+
+        config.rcc.pll2 = Some(Pll {
+            source: PllSource::HSI,
+            prediv: PllPreDiv::DIV16,
+            mul: PllMul::MUL32,
+            divp: Some(PllDiv::DIV16), // 8 MHz SAI clock
+            divq: None,
+            divr: None,
+        });
+
+        config.rcc.mux.sai1sel = mux::Saisel::PLL2_P;
+    }
+    let p = embassy_stm32::init(config);
+
+    let mut write_buffer = [0u16; 1024];
+    let (_, sai_b) = sai::split_subblocks(p.SAI1);
+
+    let mut sai_b = sai::Sai::new_asynchronous(
+        sai_b,
+        p.PF8,
+        p.PE3,
+        p.PF9,
+        p.GPDMA1_CH0,
+        &mut write_buffer,
+        Default::default(),
+    );
+
+    // Populate arbitrary data.
+    let mut data = [0u16; 256];
+    for (index, sample) in data.iter_mut().enumerate() {
+        *sample = index as u16;
+    }
+
+    loop {
+        sai_b.write(&data).await.unwrap();
+    }
+}