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<title>This sample demonstrates basic Isochronous IO under WDM with the Intel
i82930 USB controller</title>
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<p>This sample demonstrates basic Isochronous IO under WDM with the Intel i82930
USB controller. <br>
<br>
See the document for the corresponding Bulk IO sample, "BulkUsb.Doc" for
discussion of basic architechtural issues,as well as Plug and Play and Power
Management IRP handling, as it is basically the same as in this sample.<br>
<br>
The accompanying console test application for IsoUsb.Sys, RwIso.Exe, operates
similarly to RwBulk.Exe, the console test app for BulkUsb.sys. See BulkUsb.Doc.</p>
<p>Installing IsoUsb.sys<br>
---------------------</p>
<ol>
<li>Make an 'OEM installation diskette' or equivalent installation source
directory for IsoUsb.sys by copying IsoUsb.sys and IsoUsb.inf into it.The
sample IsoUsb.Inf is in the DDK IsoUsb\Sys source directory. </li>
<li>Make sure your device has been programmed with the device VID/PID in the
IsoUsb.inf file. If not, edit the device VID, PID, and description text to
match your test board/device.</li>
<li>Depending on the operating system you are using:</li>
</ol>
<p>On Windows 2000:</p>
<blockquote>
<p>When you plug in the device, the "Found New Hardware Wizard" dialog box
will appear with the subheading "Install Hardware Device Drivers". Hit the
radio button labelled "Search for a suitable driver for your device
(Recommended)" and then hit the "Next" button. The following screen has you
specify your installation source floppy or directory. Do so, then hit the
"Next" button. The next screen should indicate that Windows 2000 is ready to
install the driver. Near the middle of the box, you should see the full source
path to IsoUsb.Inf. Hit the "Next" button. You'll briefly see a "copying
Files" message box, then once again the "Found New Hardware Wizard" box, now
displaying the subheading, "Hardware Install: The hardware installation is
complete". Hit the "Finish" button. You should now have a copy of IsoUsb.Sys
in your \System32\Drivers directory, a IsoUsb.Inf in your \Winnt\Inf
directory, and a newly-created IsoUsb.Pnf file, which is a precompiled setup
info file that Windows 2000 creates. If the final "Add New Hardware Wizard"
box indicates any error, or if the OS says you must reboot to finish
installation of this device, something has gone wrong. Check your Inf file,
Install directory, or driver code, follow the instructions in the below
section on simulating a 'first-time' install, and start over.</p>
</blockquote>
<p>On Win98: </p>
<blockquote>
<p>Plug in the device. The "Add New Hardware Wizard" dialog box will appear,
indicating that "This wizard searches for new drivers for: [your deviceName as
programmed into your board's hardware]. Hit the "Next" button. On the
following screen, hit the radio button labelled "Search for the best driver
for your device (Recommended)" . Hit the "Next" button. The next screen has
you specify your installation source floppy or directory. Do so, then hit the
"Next" button. The next screen should indicate that Windows is ready to
install the driver. You should see the full source path to IsoUsb.Inf under
the label: "Location of Driver". Hit the "Next" button. You will see the
"Building Driver Information Database" message box, then, if the installation
and loading of the driver have succeeded, you will see the final wizard box
saying " Windows has finished installing the software that your new hardware
device requires." Hit the "Finish" button. If the final "Add New Hardware
Wizard" box indicates any error, or if the OS says you must reboot to finish
installation of this device, something has gone wrong. Check your Inf file,
Install directory,or driver code, follow the below instructions on simulating
a 'first-time' install, and start over.</p>
</blockquote>
<p>Updating the Driver<br>
-------------------</p>
<p>To install a new version of your driver after a successful initial
installation, simply replace the binary in \System32\Drivers. If the initial or
last installation failed for any reason, follow the below instructions on
simulating a 'first-time' install.</p>
<p><br>
Simulating a 'First-time' Install <br>
-------------------------------<br>
If you want to test Inf file or installation program modifications, or if your
first install failed for any reason and you need to do, in effect, a new
'first-time' driver installation without reinstalling a fresh Win98 or Windows
2000, do the following:</p>
<ol>
<li>Delete IsoUsb.inf from the \Windows\Inf or \Winnt\Inf directory. On Winnt,
also delete IsoUsb.PNF from the \Winnt\Inf directory.</li>
<li>Delete IsoUsb.Sys from the \System32\Drivers directory.</li>
<li>Using RegEdit on Win98, or RegEdt32 on Windows 2000, purge the registry of
the following driver information:</li>
</ol>
<p>For Windows 98: </p>
<blockquote>
<p>Delete the following registry key:<br>
\LocalMachine\System\Enum\USB\[the key with your device ID/PID], <br>
( in the case of our sample as published, this would be:<br>
\LocalMachine\System\Enum\USB\VID_045E&PID_930A )</p>
</blockquote>
<p>For Windows 2000:</p>
<blockquote>
<p>Delete the following registry key:<br>
\LocalMachine\System\CurrentControlSet\Enum\USB\[the key with your deviceId/PID]<br>
On Windows 2000, you must restart the system before reinstalling the driver;
this is not neccesary on Win98.</p>
</blockquote>
<p><br>
IsoUsb.Inf is in the Sys subdirectory.</p>
<p>It allows you to set registry overrides for:</p>
<p>"DebugLevel" debug verbosity level, where 0 == no debug output, 1 == default
, higher == more verbose.</p>
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