VC编写win32下的串口通信程序

下面是一个简单的串口通信程序的代码，使用 Visual C++ 编写。请确保你已经连接好了串口设备。

#include <windows.h>
#include <iostream>

using namespace std;

int main()
{
    HANDLE hSerial;
    DCB dcbSerialParams = {0};
    COMMTIMEOUTS timeouts = {0};
    DWORD dwBytesWritten = 0;
    DWORD dwBytesRead = 0;
    char data[] = "hello world!";
    char buffer[128] = {0};

    // 打开串口
    hSerial = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

    // 设置串口参数
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
    GetCommState(hSerial, &dcbSerialParams);
    dcbSerialParams.BaudRate = CBR_9600;
    dcbSerialParams.ByteSize = 8;
    dcbSerialParams.StopBits = ONESTOPBIT;
    dcbSerialParams.Parity = NOPARITY;
    SetCommState(hSerial, &dcbSerialParams);

    // 设置超时
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    SetCommTimeouts(hSerial, &timeouts);

    // 写入数据
    if (!WriteFile(hSerial, data, sizeof(data), &dwBytesWritten, NULL))
    {
        cout << "Error writing data" << endl;
    }

    // 读取数据
    if (ReadFile(hSerial, buffer, sizeof(buffer), &dwBytesRead, NULL))
    {
        cout << "Received data: " << buffer << endl;
    }
    else
    {
        cout << "Error reading data" << endl;
    }

    // 关闭串口
    CloseHandle(hSerial);

    return 0;
}

注意：在编写该程序时，请根据你的具体情况修改串口的名称和参数，并且考虑到读写数据的时候可能会出现错误。