feat: add stopwatch demo application#74
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aiduxiaoxiong wants to merge 1 commit intoopen-vela:devfrom
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Add a simple stopwatch application demo featuring: - Start/Stop/Reset controls - Lap time recording (up to 10 laps) - Scrollable lap history list - Real-time display update at ~30 fps - Dark-themed UI with LVGL widgets Includes complete NuttX build system integration (Kconfig, Makefile, CMakeLists.txt, Make.defs) and bilingual documentation (EN/CN).
aiduxiaoxiong
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GUIDINGLI,
jianglianfang,
terry0012 and
xiaoxiang781216
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Description\n\nAdd a Stopwatch demo application built with LVGL for the OpenVela platform.\n\n## Features\n\n- Start / Stop / Reset controls with intuitive button states\n- Lap time recording — up to 10 laps with scrollable history\n- Real-time display — updates at ~30 fps using
lv_timer\n- Dark-themed UI — clean design with color-coded buttons\n- Pure C implementation — lightweight, no external dependencies beyond LVGL and libuv\n\n## File Structure\n\n\nstopwatch/\n├── CMakeLists.txt # CMake build configuration\n├── Kconfig # NuttX Kconfig options\n├── Make.defs # NuttX build system integration\n├── Makefile # NuttX Makefile\n├── README.md # English documentation\n├── README_zh-cn.md # Chinese documentation\n├── stopwatch_main.c # Application entry point\n├── stopwatch_ui.c # UI creation and event handling\n└── stopwatch_ui.h # UI header file\n\n\n## Build\n\nEnable in NuttX config:\n\nCONFIG_LVX_USE_DEMO_STOPWATCH=y\n\n\n## Usage\n\nshell\nnsh> stopwatch\n\n\n## Checklist\n\n- [x] Follows existing demo structure conventions (Kconfig, Makefile, CMakeLists.txt, Make.defs)\n- [x] Apache License 2.0 headers in all source files\n- [x] Bilingual documentation (English + Chinese)\n- [x] Clean resource management (proper init/deinit)