[wdmaudiodev] Re: is it possible to build a USB audio device with a CONTROL/BULK/INTERRUPT only USB device controller?
- From: Paal Tamas <paal_to@xxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 17 Nov 2004 11:53:49 +0100 (CET)
Why don't you try UAC3554B from Micronas. It is a complete USB
headset, with ADC and DAC and the USB controller, that acts like a
standard USB Audio device. I use the codec configuration (UAC3556B),
and it works really fine!
Bests
Tom
Aaron Phoenix <aaronphenix@xxxxxxxxx> írta:
> Hi all,
>
> We are going to build a USB microphone device with a
> USB device controller, which has four endpoints:
> -------
> Endpoint 0: 8-byte FIFO support for Control transfer;
> Endpoint 1: 64-byte FIFO support for Bulk-In/Bulk-Out
> transfer;
> Endpoint 2: 8-byte FIFO support for
> Bulk-Out/Interrupt-Out transfer;
> Endpoint 3: 64-byte FIFO support for
> Interrupt-In/Bulk-In Transfer.
> -------
>
> Now there is a USBD_STATUS_STALL_PID error when the
> call URB_FUNCTION_SELECT_CONFIGURATION returns. Here
> are the debug messages from firmware:
> -------
> reset
> reset
> [80 06 00 01 00 00 40 00] USB_DT_DEVICE, ok
> reset
> [80 06 00 01 00 00 12 00] USB_DT_DEVICE, ok
> [80 06 00 02 00 00 09 00] USB_DT_CONFIG, ok
> [80 06 00 02 00 00 FF 00] USB_DT_CONFIG, ok
> [80 06 00 03 00 00 FF 00] USB_DT_STRING, ok
> [80 06 02 03 09 04 FF 00] USB_DT_STRING, ok
> [80 06 00 03 00 00 FF 00] USB_DT_STRING, ok
> [80 06 02 03 09 04 FF 00] USB_DT_STRING, ok
> [80 06 00 01 00 00 12 00] USB_DT_DEVICE, ok
> [80 06 00 02 00 00 09 00] USB_DT_CONFIG, ok
> [80 06 00 02 00 00 64 00] USB_DT_CONFIG, ok
> -->error, firmware dectects the STALL status.
> -------
>
> This USB device controller automatically responds to
>
SET_CONFIGURATION/GET_CONFIGURATION/SET_FEATURE/CLEAR_FEAT
URE/SET_INTERFACE/GET_INTERFACE/SET_ADDRESS/GET_STATUS.
> And we have made USB Mass Storage and USB HID
> mouse&keyboard devices with this chip, all they work
> well.
>
> Is it possible to build a USB audio device needs
> Isochronous pipes with a Bulk-only USB device
> controller? How do the values of bmAttributes field of
> Endpoint Descriptor affect the host&device
> controllers? We need the expert opinions to decide to
> give up or go on with the project. Thank you!
>
> Regards,
> Aaron M. Phoenix
>
>
>
>
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