support u5 flash

1 files changed, 55 insertions, 0 deletions

diff --git a/examples/stm32u5/src/bin/flash.rs b/examples/stm32u5/src/bin/flash.rs
new file mode 100644
index 000000000..e4fd6bb9c
--- /dev/null
+++ b/examples/stm32u5/src/bin/flash.rs
@@ -0,0 +1,55 @@
+#![no_std]
+#![no_main]
+
+use defmt::{info, unwrap};
+use embassy_executor::Spawner;
+use embassy_stm32::flash::Flash;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello Flash!");
+
+    const ADDR: u32 = 0x8_0000; // This is the offset into the third region, the absolute address is 4x32K + 128K + 0x8_0000.
+
+    // wait a bit before accessing the flash
+    Timer::after_millis(300).await;
+
+    let mut f = Flash::new_blocking(p.FLASH).into_blocking_regions().bank1_region;
+
+    info!("Reading...");
+    let mut buf = [0u8; 32];
+    unwrap!(f.blocking_read(ADDR, &mut buf));
+    info!("Read: {=[u8]:x}", buf);
+
+    info!("Erasing...");
+    unwrap!(f.blocking_erase(ADDR, ADDR + 256 * 1024));
+
+    info!("Reading...");
+    let mut buf = [0u8; 32];
+    unwrap!(f.blocking_read(ADDR, &mut buf));
+    info!("Read after erase: {=[u8]:x}", buf);
+
+    info!("Writing...");
+    unwrap!(f.blocking_write(
+        ADDR,
+        &[
+            1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+            30, 31, 32
+        ]
+    ));
+
+    info!("Reading...");
+    let mut buf = [0u8; 32];
+    unwrap!(f.blocking_read(ADDR, &mut buf));
+    info!("Read: {=[u8]:x}", buf);
+    assert_eq!(
+        &buf[..],
+        &[
+            1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
+            30, 31, 32
+        ]
+    );
+}