dma transfering from buffer to the gpio

dma_gpio/src/bin/main.rs

@@ -0,0 +1,45 @@
+// src/bin/main.rs
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_sync::{
+    blocking_mutex::raw::CriticalSectionRawMutex,
+    pipe::Pipe,
+};
+use embassy_time::{Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+static PIPE: Pipe<CriticalSectionRawMutex, 64> = Pipe::new();
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello World!");
+
+    spawner.spawn(pipe_consumer_task()).unwrap();
+
+    let mut counter: u32 = 0;
+    loop {
+        let bytes = counter.to_le_bytes(); // convert 4 bytes
+        PIPE.write(&bytes).await;
+        info!("Producer pushed value {}", counter);
+
+        counter = counter.wrapping_add(1);
+        Timer::after(Duration::from_secs(2)).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn pipe_consumer_task() {
+    let mut buf = [0u8; 4];
+    loop {
+        let n = PIPE.read(&mut buf).await;
+        if n == 4 {
+            let val = u32::from_le_bytes(buf);
+            info!("Consumer read {}", val);
+        }
+    }
+}

dma_gpio/src/lib.rs

@@ -0,0 +1 @@
+#![no_std]