bare4_2

examples/rtic_bare4.rs

@@ -36,8 +36,8 @@ use address::*;
 // Here we have low level access to a bit in a register
 #[inline(always)]
 fn read_u32(addr: u32) -> u32 {
-    unsafe { core::ptr::read_volatile(addr as *const _) }
-    // core::ptr::read_volatile(addr as *const _)
+    // unsafe { core::ptr::read_volatile(addr as *const _) }
+    core::ptr::read_volatile(addr as *const _)
 }
 
 // Here we have low level access to a bit in a register
@@ -102,12 +102,13 @@ const APP: () = {
 //
 //    What was the error message and explain why.
 //
-//    ** your answer here **
+//      error[E0133]: call to unsafe function is unsafe and requires unsafe function or block
+//      I guess this is because you cant make sure that the adress is valid.
 //
 //    Digging a bit deeper, why do you think `read_volatile` is declared `unsafe`.
 //    (https://doc.rust-lang.org/core/ptr/fn.read_volatile.html, for some food for thought )
 //
-//    ** your answer here **
+//      Because you can get undefined behaviour
 //
 //    Commit your answers (bare4_2)
 //