From 6929b56b4a5da4b41fddf0a51ef4d1786805c1db Mon Sep 17 00:00:00 2001
From: 30Wedge <amagregor.2018@comcast.net>
Date: Wed, 8 May 2024 17:23:49 -0400
Subject: [PATCH] Add a user-defined HardFault handler to print ExceptionFrame
 in crash example

---
 examples/crash.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/examples/crash.rs b/examples/crash.rs
index ab2d47b..8357806 100644
--- a/examples/crash.rs
+++ b/examples/crash.rs
@@ -82,8 +82,10 @@
 use panic_halt as _;
 
 use core::ptr;
+use core::fmt::Write;
 
-use cortex_m_rt::entry;
+use cortex_m_rt::{entry, exception, ExceptionFrame};
+use cortex_m_semihosting::hio;
 
 #[entry]
 fn main() -> ! {
@@ -94,3 +96,12 @@ fn main() -> ! {
 
     loop {}
 }
+
+#[exception]
+fn HardFault(ef: &ExceptionFrame) -> ! {
+    if let Ok(mut hstdout) = hio::hstdout() {
+        writeln!(hstdout, "{:#?}", ef).ok();
+    }
+
+    loop {}
+}