windows下USB检测插拔状态

秒速五厘米 2022-12-25 11:59 46阅读 0赞

# 概述 #

利用usb设备的一些固定信息，比如PID，VID检测指定USB设备或者所有USB设备的插入与拔出状态。

注意添加头文件

**\#include <Dbt.h> //结构体定义，消息等**

# 实现方法 #

**1.**首先在消息处理中添加消息**WM\_DEVICECHANGE**

case WM_DEVICECHANGE:
    		DeviceChange(wParam,lParam);
    		break;

**DeviceChange(wParam,lParam)函数**

//Usb设备插拔检测
    void CMainFrame::DeviceChange(WPARAM wParam, LPARAM lParam)
    {
    	PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)lParam;
    	PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;
    	PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;
    	switch (wParam)
    	{
    	case DBT_DEVICEARRIVAL://设备插入
    		
    		//只检测指定PID与VID的设备
    		switch (pHdr->dbch_devicetype)
    		{
    		case DBT_DEVTYP_DEVICEINTERFACE:
    			PDEV_BROADCAST_DEVICEINTERFACE pDevInf = (PDEV_BROADCAST_DEVICEINTERFACE)pHdr;
    			wstring wstr = pDevInf->dbcc_name;
    			int Resultone = wstr.find(_T("0983"));
    			int Resulttwo = wstr.find(_T("5910"));
    			if (Resultone > 0 && Resulttwo>0)
    			{
    				m_Usb->InitUsb();
    				SetUsbStatus(true);
    			}
    			break;
    		}
    		
    
    		//检测所有usb设备
    		/*m_Usb->InitUsb();
    		SetUsbStatus(true);*/
    		break;
    	case DBT_DEVICEREMOVECOMPLETE://设备拔出
    
    		//只检测指定PID与VID的设备
    		switch (pHdr->dbch_devicetype)
    		{
    		case DBT_DEVTYP_DEVICEINTERFACE:
    			PDEV_BROADCAST_DEVICEINTERFACE pDevInf = (PDEV_BROADCAST_DEVICEINTERFACE)pHdr;
    			wstring wstr = pDevInf->dbcc_name;
    			int Resultone = wstr.find(_T("0983"));
    			int Resulttwo = wstr.find(_T("5910"));
    			if (Resultone > 0 && Resulttwo > 0)
    			{
    				m_Usb->CloseUsb();
    				SetUsbStatus(false);
    			}
    			break;
    		}
    
    
    		//检测所有usb设备
    		/*m_Usb->CloseUsb();
    		SetUsbStatus(false);*/
    		break;
    	default:
    		break;
    	}
    }

**2.在程序初始化时注册USB设备**

//本机注册USB信息
    void CMainFrame::RegisterUsb()
    {
    	//注册USB变动信息以响应WM_DEVICECHANGE消息检测USB热插拔
    
    	//static const GUID x_guid = { 0x745A17A0,0x74D3,0x11D0,0xb6FE,0x00,0XA,0x0C,0x90,0xF5,0x7DA };
    	DEV_BROADCAST_DEVICEINTERFACE DevBroadcastDeviceInterface;
    	memset(&DevBroadcastDeviceInterface, 0, sizeof(DEV_BROADCAST_DEVICEINTERFACE));
    	DevBroadcastDeviceInterface.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
    	DevBroadcastDeviceInterface.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
    	//DevBroadcastDeviceInterface.dbcc_classguid = x_guid;
    	RegisterDeviceNotification(this->GetHWND(), &DevBroadcastDeviceInterface, DEVICE_NOTIFY_ALL_INTERFACE_CLASSES);
    }