High Definition Audio WDM Driver

NTDEV
1

Hi:

My Project (Proprietary Intel Z500 board) involved a “WM8850” HD Audio
Codec. The Spec said "It is compatible to Intel High Definition audio spec
and could use Microsoft UAA driver stack.
However, after hardware was developed, and Windows 7 Pro was running OK,
Project Lead want Windows XP Embedded system for legacy project. This
controller after I modified the “HDAudio.inf” to add VID/PID for this
manufacture, and but failed on “Code 10”.

My Driver experience was on the INF and simple WDM USB filter driver level.

I start to read MSND about audio WDM driver implementation. I have time
frame about this project, 3 months to get whole thing to running the
“Legacy” application. So I need estimate how/what/who to implement this HD
Audio driver. We had contact Manufacture without any kind of help may
assistance us.

Please give me some advise. Is three months contract job can finish it?
where I can looking for help?

Thanks
Lu

2

ydlu wrote:

My Project (Proprietary Intel Z500 board) involved a “WM8850” HD Audio
Codec. The Spec said "It is compatible to Intel High Definition audio
spec and could use Microsoft UAA driver stack.
However, after hardware was developed, and Windows 7 Pro was running
OK, Project Lead want Windows XP Embedded system for legacy project.
This controller after I modified the “HDAudio.inf” to add VID/PID for
this manufacture, and but failed on “Code 10”.

The HDAudio class is supported on XP, but you may need to install the
HDAudio class driver first. It isn’t included in the box.
http://support.microsoft.com/kb/888111

What is in your driver package, exactly? Is it just the INF file?
Where did you get the .SYS file from? Code 10 sometimes has a “reason
code” stored in the registry. Was there a reason code?

I start to read MSND about audio WDM driver implementation. I have
time frame about this project, 3 months to get whole thing to running
the “Legacy” application. So I need estimate how/what/who to implement
this HD Audio driver. We had contact Manufacture without any kind of
help may assistance us.

Does that mean they didn’t respond, or that they responded but said they
won’t support XP?

Please give me some advise. Is three months contract job can finish
it? where I can looking for help?

Writing an HDAudio driver from scratch is way more than that, but you
shouldn’t need to do so.

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.