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绘图流程沉淀为 draw-diagram skill，SVG 收拢到 docs/images/

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<text x="26" y="40" font-size="20" font-weight="700" fill="#0f172a">STM32F4-Base 项目分层架构</text>
<text x="26" y="62" font-size="13" fill="#64748b">STM32F407ZGTx @168MHz · FreeRTOS V10.3.1 (CMSIS-RTOS2) · 上层只依赖相邻下层</text>
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<text x="44" y="104" font-size="17" font-weight="700" fill="#2563eb">① 业务层</text>
<text x="134" y="104" font-size="12" fill="#64748b">顶层共享配置 · 被 UI 与基础服务共用</text>
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<text x="241" y="139" font-size="13" fill="#1e293b" text-anchor="middle">net_cfg（网口配置：IP/掩码/网关/MAC + Flash 持久化）</text>
<rect x="26" y="214" width="741" height="188" rx="12" fill="#f5f3ff" stroke="#7c3aed" stroke-opacity="0.45"/>
<text x="44" y="240" font-size="17" font-weight="700" fill="#7c3aed">② UI 层</text>
<text x="129" y="240" font-size="12" fill="#64748b">Drivers/BSP/UI · 与 PC 模拟器共用</text>
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<text x="125" y="275" font-size="13" fill="#1e293b" text-anchor="middle">ui_port（显示端口）</text>
<rect x="216" y="252" width="275" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="354" y="275" font-size="13" fill="#1e293b" text-anchor="middle">ui_menu / ui_menu_view（级联菜单）</text>
<rect x="502" y="252" width="179" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="592" y="275" font-size="13" fill="#1e293b" text-anchor="middle">ui_menu_tab（菜单表）</text>
<rect x="44" y="300" width="236" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="162" y="323" font-size="13" fill="#1e293b" text-anchor="middle">ui_content_page（内容页框架）</text>
<rect x="290" y="300" width="179" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="380" y="323" font-size="13" fill="#1e293b" text-anchor="middle">ui_page_*（5 页插件）</text>
<rect x="480" y="300" width="238" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="599" y="323" font-size="13" fill="#1e293b" text-anchor="middle">ui_net_sink（远程显示 :7003）</text>
<rect x="44" y="348" width="208" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="148" y="371" font-size="13" fill="#1e293b" text-anchor="middle">ui_font_cn_12（中文字体）</text>
<rect x="262" y="348" width="172" height="38" rx="8" fill="#ffffff" stroke="#7c3aed" stroke-opacity="0.55"/>
<text x="348" y="371" font-size="13" fill="#1e293b" text-anchor="middle">ui_deco（浅 V 装饰）</text>
<rect x="793" y="214" width="741" height="188" rx="12" fill="#f0fdfa" stroke="#0d9488" stroke-opacity="0.45"/>
<text x="811" y="240" font-size="17" font-weight="700" fill="#0d9488">③ 基础服务层</text>
<text x="935" y="240" font-size="12" fill="#64748b">应用侧服务 / 编排</text>
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<text x="896" y="275" font-size="13" fill="#1e293b" text-anchor="middle">app_main（启动编排）</text>
<rect x="991" y="252" width="177" height="38" rx="8" fill="#ffffff" stroke="#0d9488" stroke-opacity="0.55"/>
<text x="1080" y="275" font-size="13" fill="#1e293b" text-anchor="middle">sys_clock（墙钟基准）</text>
<rect x="1179" y="252" width="185" height="38" rx="8" fill="#ffffff" stroke="#0d9488" stroke-opacity="0.55"/>
<text x="1271" y="275" font-size="13" fill="#1e293b" text-anchor="middle">sys_events（就绪屏障）</text>
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<text x="892" y="323" font-size="13" fill="#1e293b" text-anchor="middle">app_cfg（编译开关）</text>
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<text x="1122" y="323" font-size="13" fill="#1e293b" text-anchor="middle">task/（net · ui · adc* · rs485*）</text>
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<text x="1344" y="323" font-size="13" fill="#1e293b" text-anchor="middle">lftpd（FTP :21）</text>
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<text x="924" y="371" font-size="13" fill="#1e293b" text-anchor="middle">time_sync（TCP 对时 :8888）</text>
<rect x="26" y="446" width="1508" height="92" rx="12" fill="#f0fdf4" stroke="#16a34a" stroke-opacity="0.45"/>
<text x="44" y="472" font-size="17" font-weight="700" fill="#16a34a">④ 中间件层</text>
<text x="151" y="472" font-size="12" fill="#64748b">通用库 / 协议栈</text>
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<text x="186" y="507" font-size="13" fill="#1e293b" text-anchor="middle">net_socket / net_select（BSD API）</text>
<rect x="338" y="484" width="147" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="412" y="507" font-size="13" fill="#1e293b" text-anchor="middle">FatFs（文件系统）</text>
<rect x="495" y="484" width="186" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="588" y="507" font-size="13" fill="#1e293b" text-anchor="middle">nand_ftl（dhara FTL）</text>
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<text x="774" y="507" font-size="13" fill="#1e293b" text-anchor="middle">LVGL v9.2（图形库）</text>
<rect x="866" y="484" width="186" height="38" rx="8" fill="#ffffff" stroke="#16a34a" stroke-opacity="0.55"/>
<text x="960" y="507" font-size="13" fill="#1e293b" text-anchor="middle">util（crc · ringbuf）</text>
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<text x="44" y="608" font-size="17" font-weight="700" fill="#d97706">⑤ 驱动层</text>
<text x="134" y="608" font-size="12" fill="#64748b">Drivers/BSP · 芯片时序/中断</text>
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<text x="133" y="643" font-size="13" fill="#1e293b" text-anchor="middle">ch395f（SPI2 + DMA）</text>
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<text x="314" y="643" font-size="13" fill="#1e293b" text-anchor="middle">gd5f2gq5ue（SPI1）</text>
<rect x="406" y="620" width="195" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="503" y="643" font-size="13" fill="#1e293b" text-anchor="middle">tpafe5160（并行 16 位）</text>
<rect x="611" y="620" width="133" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="677" y="643" font-size="13" fill="#1e293b" text-anchor="middle">sd2506（I2C1）</text>
<rect x="754" y="620" width="171" height="38" rx="8" fill="#ffffff" stroke="#d97706" stroke-opacity="0.55"/>
<text x="840" y="643" font-size="13" fill="#1e293b" text-anchor="middle">rs485（UART5 + DE）</text>
<rect x="26" y="718" width="1508" height="92" rx="12" fill="#f1f5f9" stroke="#475569" stroke-opacity="0.45"/>
<text x="44" y="744" font-size="17" font-weight="700" fill="#475569">⑥ 内核 / HAL</text>
<text x="176" y="744" font-size="12" fill="#64748b">调度 · 外设抽象</text>
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<text x="208" y="779" font-size="13" fill="#1e293b" text-anchor="middle">FreeRTOS V10.3.1（CMSIS-RTOS2 · heap_4）</text>
<rect x="383" y="756" width="189" height="38" rx="8" fill="#ffffff" stroke="#475569" stroke-opacity="0.55"/>
<text x="478" y="779" font-size="13" fill="#1e293b" text-anchor="middle">STM32 HAL（时基 TIM7）</text>
<rect x="582" y="756" width="144" height="38" rx="8" fill="#ffffff" stroke="#475569" stroke-opacity="0.55"/>
<text x="655" y="779" font-size="13" fill="#1e293b" text-anchor="middle">CMSIS / 启动文件</text>
<rect x="26" y="854" width="1508" height="92" rx="12" fill="#fff1f2" stroke="#e11d48" stroke-opacity="0.45"/>
<text x="44" y="880" font-size="17" font-weight="700" fill="#e11d48">⑦ 硬件</text>
<text x="117" y="880" font-size="12" fill="#64748b">STM32F407ZGTx @168MHz</text>
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<text x="133" y="915" font-size="13" fill="#1e293b" text-anchor="middle">CH395F 以太网（SPI2）</text>
<rect x="233" y="892" width="201" height="38" rx="8" fill="#ffffff" stroke="#e11d48" stroke-opacity="0.55"/>
<text x="334" y="915" font-size="13" fill="#1e293b" text-anchor="middle">GD5F2GQ5UE NAND（SPI1）</text>
<rect x="445" y="892" width="182" height="38" rx="8" fill="#ffffff" stroke="#e11d48" stroke-opacity="0.55"/>
<text x="536" y="915" font-size="13" fill="#1e293b" text-anchor="middle">TPAFE5160 ADC（并行）</text>
<rect x="637" y="892" width="163" height="38" rx="8" fill="#ffffff" stroke="#e11d48" stroke-opacity="0.55"/>
<text x="718" y="915" font-size="13" fill="#1e293b" text-anchor="middle">SD2506 RTC（I2C1）</text>
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<text x="881" y="915" font-size="13" fill="#1e293b" text-anchor="middle">RS-485（UART5）</text>
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<text x="1052" y="915" font-size="13" fill="#1e293b" text-anchor="middle">USART1 调试（115200）</text>
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<text x="1192" y="915" font-size="13" fill="#1e293b" text-anchor="middle">6x LED</text>
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<text x="26" y="982" font-size="12" fill="#94a3b8">上层只依赖相邻下层（单向）；UI 层与基础服务层同级并列，均使用顶层 net_cfg。跨层调用细节见 docs/项目架构总览.md §1.2 * 预留未接入调度</text>
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