[wdmaudiodev] USB Audio Using Interrupt Transfers
- From: "vrf" <vrf@xxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 17 Jun 2003 10:06:01 +0800
Dear all,
I have a motorola usb module (MC68HC908JB8/MC68HC08JB8/MC68HC08JT8-Rev. 2.0).
Now I need to develop a USB Audio device using it. And the device should be
able to be used by Windows Sound Recorder or NetMeeting as a system sound
device.
As you know, it only supports interrupt transfers. And it has 3 endpoints
including control endpoint. Endpoint 1 just has input direction through which I
need to implement a keyboard. Thus ep2 is the only choice to transfer audio
data. How could I implement my project?
I think there may be two methods:
Method One:
Describe USB as Audio using interrupt transfers
then, on Host side
CreateFile(Open Device)----->My USBAudio.sys
Method two:
Describe USB as Audio with Isochronous transfers
then, on Host side
CreateFile -----> USBAudio.sys (generic driver supplied by Microsoft) -----> My
Filter Driver
Which solution is good, or there is another better one?
Any advices are very appreciated!
Best Regards!
vrf
2003-06-17
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