feat(vscode): add connect-under-reset tasks

.vscode/tasks.json

@@ -120,6 +120,94 @@
                 "tooltip": "Erase MCU"
             }
         },
+        {
+            "label": "Build and Flash (Connect Under Reset)",
+            "dependsOn": [
+                "Build",
+                "Flash MCU (Connect Under Reset)"
+            ],
+            "dependsOrder": "sequence",
+            "group": "build",
+            "icon": {
+                "id": "insert",
+                "tooltip": "Build and Flash (Connect Under Reset)"
+            }
+        },
+        {
+            "label": "Flash MCU (Connect Under Reset)",
+            "type": "process",
+            "command": "${env:GD32_OPENOCD_BIN}/openocd.exe",
+            "args": [
+                "-s", "${env:GD32_OPENOCD_SCRIPTS}",
+                "-f", "${env:GD32_OPENOCD_SCRIPTS}/${config:gd32.openocd.targetConfig}",
+                "-c", "adapter srst delay 100; reset_config srst_only srst_nogate connect_assert_srst; init; adapter deassert srst; sleep 200; catch {reset halt}; reset halt; flash write_image erase ${command:cmake.launchTargetFilename}; reset; exit"
+            ],
+            "group": "build",
+            "problemMatcher": [],
+            "options": {
+                "cwd": "${command:cmake.buildDirectory}/Application",
+                "environment": {
+                    "OPENOCD_SCRIPTS": "${env:GD32_OPENOCD_SCRIPTS}"
+                }
+            },
+            "presentation": {
+                "clear": true
+            },
+            "icon": {
+                "id": "gather",
+                "tooltip": "Flash MCU (Connect Under Reset)"
+            }
+        },
+        {
+            "label": "Reset MCU (Connect Under Reset)",
+            "type": "process",
+            "command": "${env:GD32_OPENOCD_BIN}/openocd.exe",
+            "args": [
+                "-s", "${env:GD32_OPENOCD_SCRIPTS}",
+                "-f", "${env:GD32_OPENOCD_SCRIPTS}/${config:gd32.openocd.targetConfig}",
+                "-c", "adapter srst delay 100; reset_config srst_only srst_nogate connect_assert_srst; init; adapter deassert srst; sleep 200; reset; exit"
+            ],
+            "group": "build",
+            "problemMatcher": [],
+            "options": {
+                "cwd": "${command:cmake.buildDirectory}/Application",
+                "environment": {
+                    "OPENOCD_SCRIPTS": "${env:GD32_OPENOCD_SCRIPTS}"
+                }
+            },
+            "presentation": {
+                "clear": true
+            },
+            "icon": {
+                "id": "discard",
+                "tooltip": "Reset MCU (Connect Under Reset)"
+            }
+        },
+        {
+            "label": "Mass Erase MCU (Connect Under Reset)",
+            "type": "process",
+            "command": "${env:GD32_OPENOCD_BIN}/openocd.exe",
+            "args": [
+                "-s", "${env:GD32_OPENOCD_SCRIPTS}",
+                "-f", "${env:GD32_OPENOCD_SCRIPTS}/${config:gd32.openocd.targetConfig}",
+                "-c", "adapter srst delay 100; reset_config srst_only srst_nogate connect_assert_srst; init; adapter deassert srst; sleep 200; catch {reset halt}; reset halt; ${config:gd32.openocd.massEraseCommand}; exit"
+            ],
+            "group": "build",
+            "problemMatcher": [],
+            "options": {
+                "cwd": "${command:cmake.buildDirectory}/Application",
+                "environment": {
+                    "OPENOCD_SCRIPTS": "${env:GD32_OPENOCD_SCRIPTS}"
+                }
+            },
+            "presentation": {
+                "clear": true
+            },
+            "icon": {
+                "id": "clear-all",
+                "tooltip": "Erase MCU (Connect Under Reset)"
+            }
+        },
         {
             "label": "OpenOCD Server",
             "type": "process",

README.md

@@ -306,6 +306,12 @@ source [find interface/cmsis-dap.cfg]
 source [find target/gd32e23x.cfg]
 ```
 
+模板同时提供 `Flash MCU (Connect Under Reset)`、`Reset MCU (Connect Under Reset)` 和
+`Mass Erase MCU (Connect Under Reset)` 三个可选任务，用于固件复用 SWD 引脚后普通方式无法连接的场景。
+这些任务会在启动 OpenOCD 时临时设置 `connect_assert_srst`，不需要修改工具链目录中的 cfg 文件。
+使用前必须将调试器的 RST 线连接到 MCU 的 NRST；若固件会复用 SWD 引脚，还应在松开复位后保留至少
+2 秒的调试挂接窗口。未连接 RST 线时继续使用不带 `Connect Under Reset` 后缀的普通任务。
+
 每台开发电脑配置一次用户环境变量（路径按本机实际位置填写）：
 
 ```powershell
@@ -375,10 +381,11 @@ cmake --build Build/Release
 
 ### 烧录
 
-通过 VSCode 任务栏运行 `Flash MCU` 任务，或命令行：
+通过 VSCode 任务栏运行 `Flash MCU` 任务。若固件运行后会复用 SWD 引脚，且调试器的 RST 已连接到
+MCU 的 NRST，则改用 `Build and Flash (Connect Under Reset)`。普通模式也可通过命令行烧录：
 
 ```bash
-openocd -f interface/cmsis-dap.cfg -f target/gd32e23x.cfg -c "program Build/Debug/Application.elf verify reset exit"
+openocd -f interface/cmsis-dap.cfg -f target/gd32e23x.cfg -c "program Build/Debug/Application/Application.elf verify reset exit"
 ```
 
 ### 产物