蓝牙虚拟串口 C++ windous 平台 例程

以下是一个基于 Windows 平台的蓝牙虚拟串口的 C 语言例程：

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bluetoothapis.h>

int main(int argc, char *argv[])
{
    HANDLE hComm;
    DCB dcb;
    COMMTIMEOUTS timeouts;
    DWORD bytesWritten, bytesRead;
    char buffer[1024];

    // 初始化蓝牙 API
    if (BluetoothSetMode(NULL, BLUETOOTH_MODE_CONNECTABLE) != ERROR_SUCCESS)
    {
        printf("Failed to initialize Bluetooth API.\n");
        return 1;
    }

    // 搜索蓝牙设备
    BLUETOOTH_DEVICE_SEARCH_PARAMS searchParams = { sizeof(BLUETOOTH_DEVICE_SEARCH_PARAMS), 1, 0, 0, 0, 0, 5, NULL };
    BLUETOOTH_DEVICE_INFO deviceInfo = { sizeof(BLUETOOTH_DEVICE_INFO), 0 };
    HBLUETOOTH_DEVICE_FIND hDeviceFind = BluetoothFindFirstDevice(&searchParams, &deviceInfo);
    if (hDeviceFind == NULL)
    {
        printf("No Bluetooth devices found.\n");
        return 1;
    }

    // 连接蓝牙设备
    BLUETOOTH_DEVICE_INFO device = { sizeof(BLUETOOTH_DEVICE_INFO), 0 };
    if (BluetoothGetDeviceInfo(deviceInfo.Address, &device) != ERROR_SUCCESS)
    {
        printf("Failed to get device information.\n");
        return 1;
    }
    BLUETOOTH_SPP_CONNECT_PARAMS sppParams = { sizeof(BLUETOOTH_SPP_CONNECT_PARAMS), deviceInfo.Address, BLUETOOTH_DEFAULT_PORT };
    HBLUETOOTH_SPP_CONNECTION hSpp = BluetoothSppConnect(NULL, &sppParams);
    if (hSpp == NULL)
    {
        printf("Failed to connect to SPP service.\n");
        return 1;
    }

    // 打开虚拟串口
    hComm = CreateFile("\\\\.\\COM31", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    if (hComm == INVALID_HANDLE_VALUE)
    {
        printf("Failed to open virtual serial port.\n");
        return 1;
    }

    // 配置串口参数
    dcb.DCBlength = sizeof(dcb);
    if (!GetCommState(hComm, &dcb))
    {
        printf("Failed to get serial port state.\n");
        return 1;
    }
    dcb.BaudRate = CBR_9600;
    dcb.ByteSize = 8;
    dcb.Parity = NOPARITY;
    dcb.StopBits = ONESTOPBIT;
    if (!SetCommState(hComm, &dcb))
    {
        printf("Failed to set serial port state.\n");
        return 1;
    }

    // 配置串口超时
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.ReadTotalTimeoutConstant = 100;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 100;
    if (!SetCommTimeouts(hComm, &timeouts))
    {
        printf("Failed to set serial port timeouts.\n");
        return 1;
    }

    // 读写数据
    while (1)
    {
        // 从蓝牙设备读取数据
        if (BluetoothSppReceive(hSpp, buffer, sizeof(buffer), &bytesRead) == ERROR_SUCCESS)
        {
            // 写入虚拟串口
            if (!WriteFile(hComm, buffer, bytesRead, &bytesWritten, NULL))
            {
                printf("Failed to write data to serial port.\n");
                return 1;
            }
        }

        // 从虚拟串口读取数据
        if (ReadFile(hComm, buffer, sizeof(buffer), &bytesRead, NULL))
        {
            // 发送给蓝牙设备
            if (BluetoothSppSend(hSpp, buffer, bytesRead, &bytesWritten) != ERROR_SUCCESS)
            {
                printf("Failed to send data to Bluetooth device.\n");
                return 1;
            }
        }
    }

    // 关闭所有句柄
    CloseHandle(hComm);
    BluetoothSppDisconnect(hSpp);
    BluetoothFindDeviceClose(hDeviceFind);

    return 0;
}

该程序首先初始化 Bluetooth API，然后搜索并连接到蓝牙设备，并打开一个虚拟串口（例如 COM31）。程序配置了串口参数和超时，并在一个循环中不断地从蓝牙设备读取数据并写入虚拟串口，以及从虚拟串口读取数据并发送给蓝牙设备。程序在结束时关闭所有句柄。注意，这只是一个简单的例程，实际应用中可能需要更加健壮的错误处理和线程控制。