initial commit

include/adc_sweep/serial_port.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+
+namespace adc_sweep {
+
+class SerialPort {
+public:
+    SerialPort() = default;
+    ~SerialPort();
+
+    bool open_raw(const std::string& path, int baud, std::string& err);
+    void close();
+    bool is_open() const { return fd_ >= 0; }
+
+    ssize_t read_some(uint8_t* buf, size_t cap, std::string& err);
+
+private:
+    int fd_ = -1;
+};
+
+}  // namespace adc_sweep