Add a basic VSCode configuration for probe-rs-debugger (#29)

* Add a basic VSCode configuration for probe-rs-debugger

* VSCode: have launch build first and use debug binary

* Got defmt working in vs-code-debugger

* Add VSCode debugger setup to README

.vscode/launch.json

@@ -0,0 +1,45 @@
+// The format of this file is specified in https://probe.rs/docs/tools/vscode/#start-a-debug-session-with-minimum-configuration
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "preLaunchTask": "rust: cargo build",
+            "type": "probe-rs-debug",
+            "request": "launch",
+            "name": "rp2040-project",
+            "cwd": "${workspaceFolder}",
+            "chip": "rp2040",
+            // RP2040 doesn't support connectUnderReset
+            "connectUnderReset": false,
+            "speed": 4000,
+            "runtimeExecutable": "probe-rs-debugger",
+            "runtimeArgs": [
+                "debug"
+            ],
+            "flashingConfig": {
+                "flashingEnabled": true,
+                "resetAfterFlashing": true,
+                "haltAfterReset": true,
+            },
+            "coreConfigs": [
+                {
+                    "coreIndex": 0,
+                    "programBinary": "target/thumbv6m-none-eabi/debug/rp2040-project-template",
+                    "chip": "RP2040",
+                    // Uncomment this if you've downloaded the SVD from
+                    // https://github.com/raspberrypi/pico-sdk/raw/1.3.1/src/rp2040/hardware_regs/rp2040.svd
+                    // and placed it in the .vscode directory
+                    // "svdFile": "./.vscode/rp2040.svd",
+                    "rttEnabled": true,
+                    "options": {
+                        "env": {
+                            "DEFMT_LOG": "debug"
+                        }
+                    },
+                }
+            ],
+            "consoleLogLevel": "Info", //Error, Warn, Info, Debug, Trace
+            "wireProtocol": "Swd"
+        }
+    ]
+}

README.md

@@ -153,6 +153,24 @@ Some of the options for your `runner` are listed below:
   $ cargo run --release
   ```
 
+* **probe-rs-debugger**
+
+  *Step 1* - Download [`probe-rs-debugger VSCode plugin 0.4.0`](https://github.com/probe-rs/vscode/releases/download/v0.4.0/probe-rs-debugger-0.4.0.vsix)
+
+  *Step 2* - Install `probe-rs-debugger VSCode plugin`
+  ```console
+  $ code --install-extension probe-rs-debugger-0.4.0.vsix
+  ```
+
+  *Step 3* - Install `probe-rs-debugger`
+  ```console
+  $ cargo install --git https://github.com/probe-rs/probe-rs probe-rs-debugger
+  ```
+
+  *Step 4* - Open this project in VSCode
+
+  *Step 5* - Launch a debug session by choosing `Run`>`Start Debugging` (or press F5)
+
 * **Loading a UF2 over USB**  
   *Step 1* - Install [`elf2uf2-rs`](https://github.com/JoNil/elf2uf2-rs):