add debug for examples in launch.json

.vscode/launch.json

@@ -4,6 +4,7 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+
         // Launch configuration for `app`
         // - debug
         // - semihosting
@@ -24,6 +25,27 @@
             ],
             "runToMain": true,
             "cwd": "${workspaceRoot}"
+        },
+         // Launch configuration for `app`
+        // - debug
+        // - semihosting
+        // - run to main
+        {
+            "type": "cortex-debug",
+            "request": "launch",
+            "servertype": "openocd",
+            "name": "examples (debug)",
+            "preLaunchTask": "cargo build --examples",
+            "executable": "./target/thumbv7em-none-eabihf/debug/examples/${fileBasenameNoExtension}",
+            "configFiles": [
+                "interface/stlink-v2-1.cfg",
+                "target/stm32f4x.cfg"
+            ],
+            "postLaunchCommands": [
+                "monitor arm semihosting enable"
+            ],
+            "runToMain": true,
+            "cwd": "${workspaceRoot}"
         },
         // Launch configuration for `examples`
         // - debug