From 16f16fd072678f787e789e31af0b591ab94afc55 Mon Sep 17 00:00:00 2001
From: "henthe-5@student.ltu.se" <henthe-5@student.ltu.se>
Date: Tue, 19 Feb 2019 12:45:29 +0100
Subject: [PATCH] bare0_3
---
examples/bare0.rs | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/examples/bare0.rs b/examples/bare0.rs
index 3be74e1..606ac0f 100644
--- a/examples/bare0.rs
+++ b/examples/bare0.rs
@@ -19,7 +19,7 @@ extern crate panic_halt;
use cortex_m_rt::entry;
// a constant (cannot be changed at run-time)
-const X_INIT: u32 = 10;
+const X_INIT: u32 = 0xffffffff;
// global mutabale variables (changed using unsafe code)
static mut X: u32 = X_INIT;
@@ -31,9 +31,9 @@ fn main() -> ! {
let mut x = unsafe { X };
loop {
- x += 1; // <- place breakpoint here (3)
+ x.wrapping_add(1); // <- place breakpoint here (3)
unsafe {
- X += 1;
+ X.wrapping_add(1);
Y = X;
assert!(x == X && X == Y);
}
@@ -75,10 +75,10 @@ fn main() -> ! {
//
// Change (both) += opertions to use wrapping_add
// load and run the progam, what happens
-// ** your answer here **
+// ** x value stays at u32 max 4294967295**
//
// Now continue exectution, what happens
-// ** your answer here **
+// ** X,Y and x = 4294967295 **
//
// Commit your answers (bare0_3)
//
--
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