UCHAR到QT C+中的Qstring+； < Q> C++中的函数： UCHAR GetResult(HANDLE Handle, UCHAR *Address, UCHAR *Status, int *Value) { UCHAR RxBuffer[9], Checksum; DWORD Errors, BytesRead; COMSTAT ComStat; int i; //Check if enough bytes can be read ClearCommError(Handle, &Errors, &ComStat); if(ComStat.cbInQue>8) { //Receive ReadFile(Handle, RxBuffer, 9, &BytesRead, NULL); Checksum=0; for(i=0; i<8; i++) Checksum+=RxBuffer[i]; if(Checksum!=RxBuffer[8]) return TMCL_RESULT_CHECKSUM_ERROR; *Address=RxBuffer[0]; *Status=RxBuffer[2]; *Value=(RxBuffer[4] << 24) | (RxBuffer[5] << 16) | (RxBuffer[6] << 8) | RxBuffer[7]; } else return TMCL_RESULT_NOT_READY; return TMCL_RESULT_OK; } >首先，代码> GETRESULTS/CODE>既不是QT也不是C++。这是C代码。它可能会在1993年左右使用任何32位WindowsC编译器进行编译

如果您想使其现代化，可以使用

QSerialPort

：

// https://github.com/KubaO/stackoverflown/tree/master/questions/serial-controller-40754585
#include <QtWidgets>
#include <QtSerialPort>

class MyController : public QObject {
  Q_OBJECT
public:
  enum IoStatus { Closed, NotReady, Ok, ChecksumError, PortError, Invalid = -1 };
private:
  QSerialPort m_port{this};
  QDataStream m_str{&m_port};
  IoStatus m_ioStatus = Invalid;
  uint8_t m_address, m_status;
  uint32_t m_value;

  bool check(const QByteArray &packet) {
    char checksum = 0;
    for (int i = 0; i < packet.size()-1; ++i)
      checksum += packet [i];
    return checksum == packet[packet.size()-1];
  }
  void onError(QSerialPort::SerialPortError err) {
    if (err != QSerialPort::NoError)
      setIoStatus(PortError);
  }
  void onRxData() {
    if (m_port.bytesAvailable() < 9) return;
    if (m_port.error() != QSerialPort::NoError)
      return;
    if (! check(m_port.peek(9)))
      return setIoStatus(ChecksumError);
    uint8_t dummy;
    m_str >> m_address >> dummy >> m_status >> dummy >> m_value;
    setIoStatus(Ok);
  }
  void setIoStatus(IoStatus ioStatus) {
    if (m_ioStatus == ioStatus) return;
    m_ioStatus = ioStatus;
    emit ioStatusChanged(m_ioStatus);
  }
  static QString text(IoStatus ioStatus) {
    switch (ioStatus) {
    case NotReady: return "Not Ready";
    case Ok: return "Ok";
    case ChecksumError: return "Checksum Error";
    case PortError: return "Serial Port Error";
    default: return "Unknown Status";
    }
  }
public:
  explicit MyController(QObject *parent = nullptr) : QObject(parent) {
    connect(&m_port, &QIODevice::readyRead, this, &MyController::onRxData);
    connect(&m_port, static_cast<void(QSerialPort::*)(QSerialPort::SerialPortError)>(&QSerialPort::error), this, &MyController::onError);
    m_str.setByteOrder(QDataStream::BigEndian);
    QTimer::singleShot(0, this, [this]{ setIoStatus(Closed); });
  }
  bool open() {
    auto rc = m_port.open(QIODevice::ReadWrite);
    if (rc) setIoStatus(NotReady);
    return rc;
  }
  IoStatus ioStatus() const { return m_ioStatus; }
  QString ioStatusText() const { return text(m_ioStatus); }
  Q_SIGNAL void ioStatusChanged(IoStatus);
  QSerialPort *port() { return &m_port; }
};

如果您坚持使用旧的C代码，则只需在结构中返回结果，即可使其现代化一点：

struct Result {
  uint8_t address;
  uint8_t status;
  uint32_t value;
  enum Status { Ok, NotReady, ChecksumError, ReadError };
  Status ioStatus = Ok;

  QString ioStatusText() const {
    switch (ioStatus) {
    case NotReady: return "Not Ready";
    case Ok: return "Ok";
    case ChecksumError: return "Checksum Error";
    case ReadError: return "Read Error";
    default: return "Unknown Status";
    }
  }
};

Result getResult(HANDLE handle)
{
  Result result;

  DWORD errors, bytesRead;
  COMSTAT comStat;

  ClearCommError(handle, &errors, &comStat);
  if (comStat.cbInQue < 9) {
    result.ioStatus = Result::NotReady;
    return result;
  }

  uint8_t buffer[9];
  ReadFile(handle, buffer, 9, &bytesRead, NULL);

  if (bytesRead < 9) {
    result.ioStatus = Result::ReadError;
    return result;
  }

  uint8_t checksum=0;
  for (int i=0; i<8; i++)
    checksum += buffer[i];

  if (checksum != buffer[8]) {
    result.ioStatus = Result::ChecksumError;
    return result;
  }

  result.address = buffer[0];
  result.status = buffer[2];
  result.value = (buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
  return result;
}

---

函数GetResult（）返回的值只是一个uchar值，而不是指向uchar容器的指针

所以，如果我理解你的问题，我认为最快的方法（根据你提供的信息）是在你的Qt项目中这样做：

QString text_to_display;

uchar result = GetResult(RS232Handle, &Address, &Status, &Value);

switch(result)
{
    case TMCL_RESULT_OK:
         text_to_display = "TMC_RESULT_OK";
         break;

    case TMCL_RESULT_NOT_READY:
         text_to_display = "TMCL_RESULT_NOT_READY";
         break;

    case TMCL_RESULT_CHECKSUM_ERROR:
         text_to_display = "TMCL_RESULT_CHECKSUM_ERROR";
         break;

    default:
         break;
}

QLabel *label_to_show_result = new QLabel(text_to_display, this);

这不会更改您的GeResult函数，只需获取其结果并根据其在QLabel中显示文本

---

当然，您可以使用其他方法，例如QHash映射结果文本对，避免切换大小写结构。

您可以制作一个映射、hashmap或hashtable，其中键是UCHAR返回码，值是字符串表示。是的，类似于我的if语句解决方案。

struct Result {
  uint8_t address;
  uint8_t status;
  uint32_t value;
  enum Status { Ok, NotReady, ChecksumError, ReadError };
  Status ioStatus = Ok;

  QString ioStatusText() const {
    switch (ioStatus) {
    case NotReady: return "Not Ready";
    case Ok: return "Ok";
    case ChecksumError: return "Checksum Error";
    case ReadError: return "Read Error";
    default: return "Unknown Status";
    }
  }
};

Result getResult(HANDLE handle)
{
  Result result;

  DWORD errors, bytesRead;
  COMSTAT comStat;

  ClearCommError(handle, &errors, &comStat);
  if (comStat.cbInQue < 9) {
    result.ioStatus = Result::NotReady;
    return result;
  }

  uint8_t buffer[9];
  ReadFile(handle, buffer, 9, &bytesRead, NULL);

  if (bytesRead < 9) {
    result.ioStatus = Result::ReadError;
    return result;
  }

  uint8_t checksum=0;
  for (int i=0; i<8; i++)
    checksum += buffer[i];

  if (checksum != buffer[8]) {
    result.ioStatus = Result::ChecksumError;
    return result;
  }

  result.address = buffer[0];
  result.status = buffer[2];
  result.value = (buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
  return result;
}

auto result = getResult(handle);
printf("%s\n", result.ioStatusText().toLocal8Bit().constData());

QString text_to_display;

uchar result = GetResult(RS232Handle, &Address, &Status, &Value);

switch(result)
{
    case TMCL_RESULT_OK:
         text_to_display = "TMC_RESULT_OK";
         break;

    case TMCL_RESULT_NOT_READY:
         text_to_display = "TMCL_RESULT_NOT_READY";
         break;

    case TMCL_RESULT_CHECKSUM_ERROR:
         text_to_display = "TMCL_RESULT_CHECKSUM_ERROR";
         break;

    default:
         break;
}

QLabel *label_to_show_result = new QLabel(text_to_display, this);