www.pudn.com > 2004-01-16_SimSerial.rar > 1.c

// Test.cpp : Defines the entry point for the console application. 
// 
 
#include "stdafx.h" 
#include  
#include  
//#include  
 
#include  
 
#include  
#include "objbase.h" 
#include  
#include "..\inc\wdmioctl.h" 
 
DEFINE_GUID(GUID_CLASS_COMPORT,          0x86e0d1e0L, 0x8089, 0x11d0, 0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73); 
 
void HandleDevice( PSP_INTERFACE_DEVICE_DETAIL_DATA detail ); 
 
int main(int argc, char* argv[]) 
{ 
	HDEVINFO	info; 
	DWORD		n; 
	BOOL		bRet; 
	DWORD		needed; 
	SP_INTERFACE_DEVICE_DATA			ifdata; 
	PSP_INTERFACE_DEVICE_DETAIL_DATA	detail = NULL; 
 
	// 首先得到该ClassGUID值下的设备信息句柄 info. 本程序中ClassGUID代表串口设备类 
	// HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceClasses\{86e0d1e0-8089-11d0-9ce4-08003e301f73} 
	info = SetupDiGetClassDevs( (LPGUID) &GUID_CLASS_COMPORT,//(LPGUID)&GUID_WDMSAMPLE_DEVICE_INTERFACE_CLASS, 
		NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE); 
	if( info == INVALID_HANDLE_VALUE ){ 
		printf("Error %d trying to open enumeration handle for \n", GetLastError() ); 
		return 0; 
	} 
 
    ifdata.cbSize = sizeof(ifdata); 
	n = 0; 
	// 使用该 info 依次枚举当前该ClassGUID下的所有设备接口，将该接口信息放在ifdata 
    while( SetupDiEnumDeviceInterfaces(info, NULL, (LPGUID)&GUID_CLASS_COMPORT,//(LPGUID) &GUID_WDMSAMPLE_DEVICE_INTERFACE_CLASS, 
		n, &ifdata)) 
	{ 
		// 第一次调用 SetupDiGetDeviceInterfaceDetail，得到ifdata所需空间大小 
		SetupDiGetDeviceInterfaceDetail(info, &ifdata, NULL, 0, &needed, NULL); 
		detail = (PSP_INTERFACE_DEVICE_DETAIL_DATA) malloc(needed); 
		if (!detail) 
		{ 
			printf("Error %d trying to get memory for interface detail\n", GetLastError()); 
			goto FAILED; 
		} 
		// 第二次调用 SetupDiGetDeviceInterfaceDetail，得到ifdata指代的设备的详细信息 
		detail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA); 
		if (!SetupDiGetDeviceInterfaceDetail(info, &ifdata, detail, needed, NULL, NULL)) 
		{ 
			printf("Error %d getting interface detail\n", GetLastError()); 
			goto FAILED; 
		} 
 
		// 对ifdata/detail所指代的设备进行打开，IoControl，关闭等操作 
		HandleDevice( detail ); 
 
		free( detail ); 
		detail = NULL; 
		n++; 
	} 
FAILED: 
	if( detail != NULL ){ 
		free( detail ); 
	} 
	bRet = SetupDiDestroyDeviceInfoList( info ); 
	return 0; 
} 
void HandleDevice( PSP_INTERFACE_DEVICE_DETAIL_DATA detail ) 
{ 
    char	name[ MAX_PATH ]; 
	HANDLE	hfile; 
	DWORD	junk; 
	INT		ComX; 
 
	// 打开设备，此处的设备名称为Kernel mode下IoRegisterDeviceInterface后OS自动生成名称。如下形式 
	// ##?#Toaster#MsToaster#1&1aafb3d5&2&01#{86e0d1e0-8089-11d0-9ce4-08003e301f73} 
	strncpy(name, detail->DevicePath, sizeof(name)); 
	hfile = CreateFile( name, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL); 
    if (hfile == INVALID_HANDLE_VALUE) 
    { 
        printf("Error %d trying to open %s\n", GetLastError(), name); 
        return; 
    } 
	scanf( "%d", &ComX ); 
#if 1 
	if(!DeviceIoControl(hfile,IOCTL_INIT_SETTING, &ComX, sizeof( INT ), NULL , 0, &junk, NULL)) 
    { 
		printf("Direct IOCTL failed with code %d\n", GetLastError()); 
	} 
#else 
	if(!DeviceIoControl(hfile,IOCTL_FINISH_SETTING,NULL,0,NULL,0,&junk,NULL)) 
    { 
		printf("Direct IOCTL failed with code %d\n", GetLastError()); 
	} 
#endif 
 
	CloseHandle( hfile ); 
 
	printf("Hello World!\n"); 
	return; 
}