C++ 从串口读取数据

以下是C++从串口读取数据的示例代码：

#include <Windows.h>
#include <iostream>

// 定义串口句柄
HANDLE hSerial;

// 打开串口
bool OpenSerialPort()
{
    hSerial = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hSerial == INVALID_HANDLE_VALUE)
    {
        return false;
    }

    // 配置串口参数
    DCB dcbSerialParams = { 0 };
    if (!GetCommState(hSerial, &dcbSerialParams))
    {
        CloseHandle(hSerial);
        return false;
    }
    dcbSerialParams.BaudRate = CBR_9600;
    dcbSerialParams.ByteSize = 8;
    dcbSerialParams.StopBits = ONESTOPBIT;
    dcbSerialParams.Parity = NOPARITY;
    if (!SetCommState(hSerial, &dcbSerialParams))
    {
        CloseHandle(hSerial);
        return false;
    }

    // 配置串口超时
    COMMTIMEOUTS timeouts = { 0 };
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    if (!SetCommTimeouts(hSerial, &timeouts))
    {
        CloseHandle(hSerial);
        return false;
    }

    return true;
}

// 关闭串口
void CloseSerialPort()
{
    CloseHandle(hSerial);
}

int main()
{
    // 打开串口
    if (!OpenSerialPort())
    {
        std::cout << "Open Serial Port Failed!" << std::endl;
        return -1;
    }

    // 读取串口数据
    char buf[1024];
    DWORD dwBytesRead;
    if (ReadFile(hSerial, buf, sizeof(buf), &dwBytesRead, NULL))
    {
        // 处理读取到的数据
        // ...
    }

    // 关闭串口
    CloseSerialPort();

    return 0;
}

注：以上示例代码仅供参考，实际使用时需要根据具体情况进行修改。