新增 Hc05 类，支持 HC-05 蓝牙模块的串口通信，增加串口设置波特率函数

Core/App/Common/hc05.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <cerrno>
+#include <cstdint>
+
+#include "../Common/serial_port.hpp"
+
+class Hc05 {
+private:
+    static constexpr uint32_t kBaudRate = 9600;
+    static constexpr uint32_t kLength   = 128;
+    static constexpr uint32_t kTimeout  = 10;
+    std::unique_ptr<SerialPort> serialPort;
+
+    static constexpr uint8_t kCommand = 0xAA;
+
+public:
+    // App 返回单个字节 Command 结果
+    enum class Response : uint8_t {
+        kForward, // 前进
+        kBackward, // 后退
+        kTurnLeft, // 左转
+        kTurnRight, // 右转
+        kForwardLeft, // 左前方
+        kForwardRight, // 右前方
+        kBackwardLeft, // 左后方
+        kBackwardRight, // 右后方
+        kTurnAround, // 掉头/180度转向
+        kStop, // 停止，到达目的地
+    };
+
+    explicit Hc05(UART_HandleTypeDef* uart)
+        : serialPort(std::make_unique<SerialPort>(uart, kBaudRate, kLength, kTimeout)) {}
+
+    ~Hc05() = default;
+
+    Response SendCommand() {
+        Response data;
+        serialPort->WriteBytesBlocking(reinterpret_cast<const uint8_t*>(&kCommand), sizeof(kCommand));
+        serialPort->ReadBytesBlocking(reinterpret_cast<uint8_t*>(&data), sizeof(data));
+        return data;
+    }
+};