.vscode/.cortex-debug.peripherals.state.json

+[]
\ No newline at end of file

.vscode/.cortex-debug.registers.state.json

+[]
\ No newline at end of file

.vscode/launch.json

@@ -16,8 +16,8 @@
             "preLaunchTask": "cargo build",
             "executable": "./target/thumbv7em-none-eabihf/debug/app",
             "configFiles": [
-                "interface/stlink.cfg",
-                // "interface/stlink-v2-1.cfg", // deprecated setup script
+                //"interface/stlink.cfg",
+                "interface/stlink-v2-1.cfg", // deprecated setup script
                 "target/stm32f4x.cfg"
             ],
             "postLaunchCommands": [
@@ -39,8 +39,8 @@
             "preLaunchTask": "cargo build --examples",
             "executable": "./target/thumbv7em-none-eabihf/debug/examples/${fileBasenameNoExtension}",
             "configFiles": [
-                "interface/stlink.cfg",
-                // "interface/stlink-v2-1.cfg", // deprecated setup script
+                //"interface/stlink.cfg",
+                "interface/stlink-v2-1.cfg", // deprecated setup script
                 "target/stm32f4x.cfg"
             ],
             "postLaunchCommands": [
@@ -75,8 +75,8 @@
             "preLaunchTask": "cargo build --examples",
             "executable": "./target/thumbv7em-none-eabihf/debug/examples/${fileBasenameNoExtension}",
             "configFiles": [
-                "interface/stlink.cfg",
-                // "interface/stlink-v2-1.cfg", // deprecated setup script
+                //"interface/stlink.cfg",
+                "interface/stlink-v2-1.cfg", // deprecated setup script
                 "target/stm32f4x.cfg"
             ],
             "postLaunchCommands": [
@@ -100,8 +100,8 @@
             "preLaunchTask": "cargo build --examples --release",
             "executable": "./target/thumbv7em-none-eabihf/release/examples/${fileBasenameNoExtension}",
             "configFiles": [
-                "interface/stlink.cfg",
-                // "interface/stlink-v2-1.cfg", // deprecated setup script
+                //"interface/stlink.cfg",
+                "interface/stlink-v2-1.cfg", // deprecated setup script
                 "target/stm32f4x.cfg"
             ],
             "postLaunchCommands": [
@@ -125,8 +125,8 @@
             "preLaunchTask": "cargo build --examples --release",
             "executable": "./target/thumbv7em-none-eabihf/release/examples/${fileBasenameNoExtension}",
             "configFiles": [
-                "interface/stlink.cfg",
-                // "interface/stlink-v2-1.cfg", // deprecated setup script
+                //"interface/stlink.cfg",
+                "interface/stlink-v2-1.cfg", // deprecated setup script
                 "target/stm32f4x.cfg"
             ],
             "postLaunchCommands": [

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examples/bare0.rs

@@ -26,25 +26,40 @@ extern crate panic_semihosting;
 use cortex_m_rt::entry;
 
 // a constant (cannot be changed at run-time)
-const X_INIT: u32 = 10;
-//const X_INIT: u32 = core::u32::MAX;
+//const X_INIT: u32 = 10;
+const X_INIT: u32 = core::u32::MAX;
 
 // global mutable variables (changed using unsafe code)
 static mut X: u32 = X_INIT;
 static mut Y: u32 = 0;
 
+fn read_x()->u32{
+    unsafe{X}
+}
+fn read_y()->u32{
+    unsafe{Y}
+}
+
+fn write_y(y:u32){
+    unsafe{Y=y};
+}
+
+fn write_x(x:u32){
+    unsafe{X=x};
+}
+
+
 #[entry]
 fn main() -> ! {
     // local mutable variable (changed in safe code)
-    let mut x = unsafe { X };
-
+    let mut x =  read_x();
     loop {
-        x += 1; // <- place breakpoint here (3)
-        unsafe {
-            X += 1;
-            Y = X;
-            assert!(x == X && X == Y);
-        }
+        x = x.wrapping_add(1); // <- place breakpoint here (3)
+        
+        write_x(read_x().wrapping_add(1));
+        write_y(read_x());
+        assert!(x == read_x() && read_x() == read_y()+1);
+        
     }
 }
 
@@ -61,17 +76,22 @@ fn main() -> ! {
 //    Look under Variables/Local what do you find.
 //
 //    ** your answer here **
+//    local
+//      x: 4685359
 //
 //    In the Expressions (WATCH -vscode) view add X and Y
 //    what do you find
 //
 //    ** your answer here **
-//
+//    X: 4685359 
+//    Y: <optimized out>     
+
 //    Step through one complete iteration of the loop
 //    and see how the (Local) Variables are updated
 //    can you foresee what will eventually happen?
 //
 // 	  ** place your answer here **
+//    Its inceremented by one each iteration and it will eventually wrap.
 //
 //    Commit your answers (bare0_1)
 //
@@ -80,6 +100,8 @@ fn main() -> ! {
 //    (Hint, look under OUTPUT/Adopter Output to see the `openocd` output.)
 //
 //    ** your answer here **
+//    First it says that the local x gets optimized out then it panics
+//    "panicked at 'attempt to add with overflow', examples/bare0.rs:42:9"
 //
 //    Commit your answers (bare0_2)
 //
@@ -88,10 +110,10 @@ fn main() -> ! {
 //    Change (both) += operations to use wrapping_add
 //    load and run the program, what happens
 //    ** your answer here **
-//
+//    x wraps around and becomes 0 and X doesnt change
 //    Now continue execution, what happens
 //    ** your answer here **
-//
+//    x continues to get bigger X is still the same
 //    Commit your answers (bare0_3)
 //
 //    (If the program did not succeed back to the breakpoint
@@ -100,7 +122,7 @@ fn main() -> ! {
 // 4. Change the assertion to `assert!(x == X && X == Y + 1)`, what happens?
 //
 //    ** place your answer here **
-//
+//     the program panics "panicked at 'assertion failed: x == X && X == Y + 1', examples/bare0.rs:45:13"
 //    Commit your answers (bare0_4)
 //
 // 5. Remove the assertion and implement "safe" functions for

openocd.cfg

-source [find interface/stlink.cfg]
+#source [find interface/stlink.cfg]
 # deprecated
-# source [find interface/stlink-v2-1.cfg] 
+source [find interface/stlink-v2-1.cfg] 
 transport select hla_swd
 
 # increase working area to 64KB