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骑自行车的正确
在校大学生该如
微信朋友圈怎么我本来希望我是往硬件底层驱动程序发展的，本来专业就是电路方面的，这两年也
做过usb驱动的一些东西，虽然能用，但是心里一直感觉不舒服，对wdm的掌握总感觉有点
飘忽，所以假期中在看unix的操作系统实现，现在心里有点底了，可是没有真的写过彻底的
驱动程序，总有点心虚，呵呵，贴个帖子，以前bbs上的，自己也写过，也不知道到哪里了，
所以直接把人家的贴上来好了，
[scode=cpp]
#include stdafx.h
#include // Make all functions UNICODE safe.
#include // for the API UpdateDriverForPlugAndPlayDevices().
#include // for SetupDiXxx functions.
#include install.h
int DisplayError(TCHAR * ErrorName)
{
DWORD Err = GetLastError();
LPVOID lpMessageBuffer = NULL;
if (FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
Err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMessageBuffer,
0,
NULL ))
NULL; //_tprintf(TEXT(%s FAILURE: %s\\n),ErrorName,(TCHAR *)lpMessag
eBuffer);
else
NULL; //_tprintf(TEXT(%s FAILURE: (0x%08x)\\n),ErrorName,Err);
if (lpMessageBuffer) LocalFree( lpMessageBuffer ); // Free system buffer
SetLastError(Err);
return FALSE;
}
BOOL FindExistingDevice(IN LPTSTR HardwareId)
{
HDEVINFO DeviceInfoSet;
SP_DEVINFO_DATA DeviceInfoData;
DWORD i,err;
BOOL Found;
//
// Create a Device Information Set with all present devices.
//
DeviceInfoSet = SetupDiGetClassDevs(NULL, // All Classes
0,
0,
DIGCF_ALLCLASSES | DIGCF_PRESENT ); // All devices present on system
if (DeviceInfoSet == INVALID_HANDLE_VALUE)
{
return DisplayError(TEXT(GetClassDevs(All Present Devices)));
}
//_tprintf(TEXT(Search for Device ID: [%s]\\n),HardwareId);
//
// Enumerate through all Devices.
//
Found = FALSE;
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i=0;SetupDiEnumDeviceInfo(DeviceInfoSet,i,&DeviceInfoData);i++)
{
DWORD DataT;
LPTSTR p,buffer = NULL;
DWORD buffersize = 0;
//
// We won't know the size of the HardwareID buffer until we call
// this function. So call it with a null to begin with, and then
// use the required buffer size to Alloc the nessicary space.
// Keep calling we have success or an unknown failure.
//
while (!SetupDiGetDeviceRegistryProperty(
DeviceInfoSet,
&DeviceInfoData,
SPDRP_HARDWAREID,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize))
{
if (GetLastError() == ERROR_INVALID_DATA)
{
//
// May be a Legacy Device with no HardwareID. Continue.
//
break;
}
else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
//
// We need to change the buffer size.
//
if (buffer)
LocalFree(buffer);
buffer = (char *)LocalAlloc(LPTR,buffersize);
}
else
{
//
// Unknown Failure.
//
DisplayError(TEXT(GetDeviceRegistryProperty));
goto cleanup_DeviceInfo;
}
}
if (GetLastError() == ERROR_INVALID_DATA)
continue;
//
// Compare each entry in the buffer multi-sz list with our HardwareID.
//
for (p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR))
{
//_tprintf(TEXT(Compare device ID: [%s]\\n),p);
if (!_tcscmp(HardwareId,p))
{
//_tprintf(TEXT(Found! [%s]\\n),p);
Found = TRUE;
break;
}
}
if (buffer) LocalFree(buffer);
if (Found) break;
}
if (GetLastError() != NO_ERROR)
{
DisplayError(TEXT(EnumDeviceInfo));
}
//
// Cleanup.
//
cleanup_DeviceInfo:
err = GetLastError();
SetupDiDestroyDeviceInfoList(DeviceInfoSet);
SetLastError(err);
return err == NO_ERROR; //???
}
BOOL
InstallRootEnumeratedDriver(IN LPTSTR HardwareId,
IN LPTSTR INFFile,
OUT PBOOL RebootRequired OPTIONAL
)
{
HDEVINFO DeviceInfoSet = 0;
SP_DEVINFO_DATA DeviceInfoData;
GUID ClassGUID;
TCHAR ClassName[MAX_CLASS_NAME_LEN];
DWORD err;
//
// Use the INF File to extract the Class GUID.
//
if (!SetupDiGetINFClass(INFFile,&ClassGUID,ClassName,sizeof(ClassName),0))
{
return DisplayError(TEXT(GetINFClass));
}
//
// Create the container for the to-be-created Device Information Element.
//
DeviceInfoSet = SetupDiCreateDeviceInfoList(&ClassGUID,0);
if(DeviceInfoSet == INVALID_HANDLE_VALUE)
{
return DisplayError(TEXT(CreateDeviceInfoList));
}
//
// Now create the element.
// Use the Class GUID and Name from the INF file.
//
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
if (!SetupDiCreateDeviceInfo(DeviceInfoSet,
ClassName,
&ClassGUID,
NULL,
0,
DICD_GENERATE_ID,
&DeviceInfoData))
{
DisplayError(TEXT(CreateDeviceInfo));
goto cleanup_DeviceInfo;
}
//
// Add the HardwareID to the Device's HardwareID property.
//
if(!SetupDiSetDeviceRegistryProperty(DeviceInfoSet,
&DeviceInfoData,
SPDRP_HARDWAREID,
(LPBYTE)HardwareId,
(lstrlen(HardwareId)+1+1)*sizeof(TCHAR)))
{
DisplayError(TEXT(SetDeviceRegistryProperty));
goto cleanup_DeviceInfo;
}
//
// Transform the registry element into an actual devnode
// in the PnP HW tree.
//
if (!SetupDiCallClassInstaller(DIF_REGISTERDEVICE,
DeviceInfoSet,
&DeviceInfoData))
{
DisplayError(TEXT(CallClassInstaller(REGISTERDEVICE)));
goto cleanup_DeviceInfo;
}
//
// The element is now registered. We must explicitly remove the
// device using DIF_REMOVE, if we encounter any failure from now on.
//
//
// Install the Driver.
//
if (!UpdateDriverForPlugAndPlayDevices(0,
HardwareId,
INFFile,
INSTALLFLAG_FORCE,
RebootRequired))
{
DWORD err = GetLastError();
DisplayError(TEXT(UpdateDriverForPlugAndPlayDevices));
if (!SetupDiCallClassInstaller(
DIF_REMOVE,
DeviceInfoSet,
&DeviceInfoData))
{
DisplayError(TEXT(CallClassInstaller(REMOVE)));
}
SetLastError(err);
}
//
// Cleanup.
//
cleanup_DeviceInfo:
err = GetLastError();
SetupDiDestroyDeviceInfoList(DeviceInfoSet);
SetLastError(err);
return err == NO_ERROR;
}
int InstallDriver(_TCHAR *InfName, _TCHAR *HardwareID)
{
WIN32_FIND_DATA FindFileData;
BOOL RebootRequired = 0; // Must be cleared.
_TCHAR *FName, *HWID;
FName = InfName;
HWID = HardwareID;
if (FindFirstFile(FName,&FindFileData)==INVALID_HANDLE_VALUE)
{
//_tprintf(TEXT( File not found.\\n));
//_tprintf(TEXT(usage: install \\n));
return 2; // Install Failure
}
//
// Look to see if this device allready exists.
//
if (FindExistingDevice(HWID))
{
//
// No Need to Create a Device Node, just call our API.
//
if (!UpdateDriverForPlugAndPlayDevices(0, // No Window Handle
HWID, // Hardware ID
FName, // FileName
INSTALLFLAG_FORCE,
&RebootRequired))
{
DisplayError(TEXT(UpdateDriverForPlugAndPlayDevices));
return 2; // Install Failure
}
}
else
{
if (GetLastError()!= ERROR_NO_MORE_ITEMS)
{
//
// An unknown failure from FindExistingDevice()
//
//_tprintf(TEXT((IERROR_NO_MORE_ITEMS)\\n));
//_tprintf(TEXT((Install Failure! Code = 2)\\n));
return 2; // Install Failure
}
//
// Driver Does not exist, Create and call the API.
// HardwareID must be a multi-sz string, which argv[2] is.
//
if (!InstallRootEnumeratedDriver(HWID, // HardwareID
FName, // FileName
&RebootRequired))
{
//_tprintf(TEXT((InstallRootEnumeratedDriver Failure! Code = 2)\\n
));
return 2; // Install Failure
}
}
//_tprintf(TEXT(Driver Installed successfully.\\n));
if (RebootRequired)
{
//_tprintf(TEXT((Reboot Required)\\n));
return 1; // Install Success, reboot required.
}
return 0; // Install Success, no reboot required.
}
int RemoveDriver(_TCHAR *HardwareID)
{
HDEVINFO DeviceInfoSet;
SP_DEVINFO_DATA DeviceInfoData;
DWORD i,err;
DeviceInfoSet = SetupDiGetClassDevs(NULL, // All Classes
0,
0,
DIGCF_ALLCLASSES | DIGCF_PRESENT ); // All devices present on system
if (DeviceInfoSet == INVALID_HANDLE_VALUE)
{
DisplayError(TEXT(GetClassDevs(All Present Devices)));
return 1;
}
//
// Enumerate through all Devices.
//
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i=0;SetupDiEnumDeviceInfo(DeviceInfoSet,i,&DeviceInfoData);i++)
{
DWORD DataT;
LPTSTR p,buffer = NULL;
DWORD buffersize = 0;
//
// We won't know the size of the HardwareID buffer until we call
// this function. So call it with a null to begin with, and then
// use the required buffer size to Alloc the nessicary space.
// Keep calling we have success or an unknown failure.
//
while (!SetupDiGetDeviceRegistryProperty(
DeviceInfoSet,
&DeviceInfoData,
SPDRP_HARDWAREID,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize))
{
if (GetLastError() == ERROR_INVALID_DATA)
{
//
// May be a Legacy Device with no HardwareID. Continue.
//
break;
}
else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
{
//
// We need to change the buffer size.
//
if (buffer)
LocalFree(buffer);
buffer = (char *)LocalAlloc(LPTR,buffersize);
}
else
{
//
// Unknown Failure.
//
DisplayError(TEXT(GetDeviceRegistryProperty));
goto cleanup_DeviceInfo;
}
}
if (GetLastError() == ERROR_INVALID_DATA)
continue;
//
// Compare each entry in the buffer multi-sz list with our HardwareID.
//
for (p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR))
{
//_tprintf(TEXT(Compare device ID: [%s]\\n),p);
if (!_tcscmp(HardwareID,p))
{
//_tprintf(TEXT(Found! [%s]\\n),p);
//
// Worker function to remove device.
//
if (!SetupDiCallClassInstaller(DIF_REMOVE,
DeviceInfoSet,
&DeviceInfoData))
{
DisplayError(TEXT(CallClassInstaller(REMOVE)));
}
break;
}
}
if (buffer) LocalFree(buffer);
}
if ((GetLastError()!=NO_ERROR)&&(GetLastError()!=ERROR_NO_MORE_ITEMS))
{
DisplayError(TEXT(EnumDeviceInfo));
}
//
// Cleanup.
//
cleanup_DeviceInfo:
err = GetLastError();
SetupDiDestroyDeviceInfoList(DeviceInfoSet);
return err;
}
[/scode]