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： ```c #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。