159 lines
4.6 KiB
Markdown
159 lines
4.6 KiB
Markdown
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| **DCS ****项目****串口通信协议说明书** | |
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| --- | --- |
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| **版本** | **日期** | **负责人** | **主要内容** |
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| --- | --- | --- | --- |
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| Version v1.0.0v1.0.0 | 2025-10-17 | 开发部/覃陆孙 | 通信协议与示例帧 |
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| **1. ****通信参数** | |
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| --- | --- |
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| **项目** | **参数** |
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| --- | --- |
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| 通信方式 | UART（RS232/TTL 兼容） |
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| 波特率 | 115200 bps |
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| 数据位 | 8 |
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| 停止位 | 1 |
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| 校验位 | None |
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| 流控 | None |
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| 通信方向 | 双向（嵌入式主控 ↔ 安卓上位机） |
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| 字节序 | Little Endian |
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| **2. ****通信帧格式** | |
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| --- | --- |
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| **字段** | **长度****(Byte)** | **说明** |
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| --- | --- | --- |
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| 帧头 | 2 | 固定： 0xAA 0x55 |
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| 命令字 | 1 | 指令类型（握手/心跳/上报/报警等） |
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| 数据长度 | 1 | 数据区字节数 |
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| 数据区 | N | 实际数据内容 |
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| 校验 | 1 | 从“命令字”到“数据区最后字节”的异或校验 |
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| 帧尾 | 2 | 固定： 0x0D 0x0A |
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| **3. ****命令字定义** | |
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| --- | --- |
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| **命令字** | **方向** | **含义** |
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| --- | --- | --- |
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| 0x01 | 下→上 | 握手应答 + 时间同步 |
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| 0x02 | 上→下 | 握手请求 |
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| 0x03 | 上→下 | 心跳上报（含状态） |
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| 0x04 | 下→上 | 心跳应答 |
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| 0x05 | 下→上 | 报警控制命令（开启/关闭/等级） |
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| 0x06 | 上→下 | 数据上报（BFI、电量、温度等） |
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| 0x07 | 下→上 | 参数查询或设置命令 |
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| 0x08 | 上→下 | 告警状态反馈 |
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| 0x09 | 下→上 | 时间同步命令（可选） |
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| **4. ****协议说明** **4.1 ****握手流程（上电后）** | |
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| --- | --- |
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**嵌入式上电后主动发送握手请求：**
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| **字段** | **示例值** | **说明** |
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| --- | --- | --- |
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| 帧头 | AA 55 | 固定 |
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| 命令字 | 0x02 | 握手请求 |
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| 数据长度 | 1 | 固件版本号长度 |
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| 数据 | 0x01 | 固件版本 V1 |
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| 校验 | XOR | 异或和 |
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| 帧尾 | 0D 0A | 固定 |
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上位机收到后返回时间同步帧：
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AA 55 01 05 YY MM DD HH mm ss CS 0D 0A
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| **4.2 ****心跳与状态上报（周期**** 1s****）** | |
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| --- | --- |
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命令字：0x03
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| **字段** | **长度** | **说明** |
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| --- | --- | --- |
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| BFI 血流值 | 4 | float, 嵌入式算法计算结果 |
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| 电池电量 | 1 | 百分比 0–100% |
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| 电池电压 | 2 | 单位 mV |
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| 内部温度 | 2 | 单位 0.1°C |
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| 激光器状态 | 1 | 0=异常，1=工作,2=停止 |
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| 电源类型 | 1 | 0=AC,1=BAT |
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| 保留扩展 | 4 | 预留字段 |
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| 校验 | 1 | 异或校验 |
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上位机应答帧：
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AA 55 04 01 00 CS 0D 0A
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| **4.3 ****报警控制命令（上位机**** → ****嵌入式）** | |
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| --- | --- |
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命令字：**0x05**
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| **字段** | **长度** | **说明** |
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| --- | --- | --- |
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| 报警代码 | 1 | 见下方报警表 |
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| 报警级别 | 1 | 0=低,1=中,2=高 |
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| 报警状态 | 1 | 0=清除,1=触发 |
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| 校验 | 1 | 异或校验 |
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**示例：**
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AA 55 05 03 31 02 01 CS 0D 0A
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→ 表示触发高优先报警，代码31（电池电量<5%）
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嵌入式根据报警等级执行：
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| **优先级** | **指示灯** |
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| --- | --- |
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| 高 | 详细见《报警声光表达》 |
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| 中 | - |
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| 低 | - |
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| **4.4 ****数据上报（嵌入式**** → ****上位机）** | |
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| --- | --- |
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命令字：**0x06**
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| **字段** | **长度** | **说明** |
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| --- | --- | --- |
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| BFI 数据 | 4 | Float 32 位 |
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| 电池电量 | 1 | 百分比 |
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| 电压 | 2 | mV |
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| 内部温度 | 2 | 0.1°C |
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| 激光器状态 | 1 | 0=关,1=开,2=异常 |
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| 电源状态 | 1 | 0=AC,1=BAT |
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| 扩展保留 | 4 | 预留字段 |
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| 校验 | 1 | 异或校验 |
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**示例：**
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AA 55 06 0B 42 48 00 00 64 0F 27 01 2C 00 01 00 00 00 CS 0D 0A
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→ BFI=50.0，电量=100%，电压=9999mV，温度=30.0°C，激光状态工作中
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| **5. ****报警代码表** | |
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| --- | --- |
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| **报警代码** | **优先级** | **报警原因** | **报文方向** |
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| --- | --- | --- | --- |
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| 11 | 低 | 电池电量低（<40%） | 下位→上位 |
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| 21 | 中 | 电池电量低（<20%） | 下位→上位 |
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| 31 | 高 | 电池电量空（<5%） | 下位→上位 |
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| 32 | 高 | BFI 数值异常 | 上位→下位 |
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| 22 | 中 | 激光器温度异常 | 上位→下位 |
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| 33 | 高 | 激光器工作异常 | 上位→下位 |
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| 34 | 高 | 通信异常 | 上位→下位 |
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| 35 | 高 | 电池故障 | 上位→下位 |
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| 12 | 低 | 交流电未连接 | 上位→下位 |
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| **6. ****典型通信时序流程** | |
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| --- | --- |
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| MCU Android |
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| --- |
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| 握手请求 (0x02) ->|
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|<- 握手应答 + 时间同步 (0x01) |
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| 周期心跳上报 (0x03) ->|
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|<- 心跳应答 (0x04) |
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|<-触发报警 33（高优先） |
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| 确认并执行灯光报警 ->|
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| 周期数据上报 (0x06) ->|
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