stm32: add backup sram mod

1 files changed, 31 insertions, 0 deletions

diff --git a/examples/stm32h5/src/bin/backup_sram.rs b/examples/stm32h5/src/bin/backup_sram.rs
new file mode 100644
index 000000000..f8db1853e
--- /dev/null
+++ b/examples/stm32h5/src/bin/backup_sram.rs
@@ -0,0 +1,31 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::Config;
+use embassy_stm32::backup_sram::BackupMemory;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut config = Config::default();
+    config.rcc.ls.enable_backup_sram = true;
+
+    let p = embassy_stm32::init(config);
+    info!("Started!");
+
+    let (bytes, status) = BackupMemory::new(p.BKPSRAM);
+
+    match status {
+        false => info!("BKPSRAM just enabled"),
+        true => info!("BKPSRAM already enabled"),
+    }
+
+    loop {
+        info!("byte0: {}", bytes[0]);
+        bytes[0] = bytes[0].wrapping_add(1);
+        Timer::after_millis(500).await;
+    }
+}