1 files changed, 24 insertions, 0 deletions
diff --git a/cortex-m-rt/examples/state.rs b/cortex-m-rt/examples/state.rs
new file mode 100644
index 0000000..ee6224d
--- /dev/null
+++ b/cortex-m-rt/examples/state.rs
@@ -0,0 +1,24 @@
+//! Preserving state across executions of an exception handler
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+extern crate cortex_m_rt as rt;
+extern crate panic_halt;
+
+use rt::{entry, exception};
+
+#[entry]
+fn main() -> ! {
+    loop {}
+}
+
+// exception handler with state
+#[exception]
+fn SysTick() {
+    static mut STATE: u32 = 0;
+
+    *STATE += 1;
+}