HS isochronous transfer on musb_otg
Hans Petter Selasky
hps at bitfrost.no
Fri Aug 2 06:29:55 UTC 2013
On 08/01/13 16:07, SAITOU Toshihide wrote:
> My UVC cam is not working with the musb_otg driver and
> libusb(3) on the BeagleBone Black.
>
Hi,
It might be that the packet multiplier is not set correctly. Try to
figure out which register this is, and simply set the bits correctly.
Thank you!
--HPS
> With the following changes to the musb_otg.c, it feels like
> the transaction is performed as expected but the data
> doesn't pass to the libusb_transfer's buffer. Does anyone
> know what is wrong?
>
>
> 1729c1729
> < MUSB2_WRITE_1(sc, MUSB2_REG_RXNAKLIMIT, MAX_NAK_TO);
> ---
>> MUSB2_WRITE_1(sc, MUSB2_REG_RXNAKLIMIT, 0);
> 4046c4046
> < parm->hc_max_frame_size = 0x400;
> ---
>> parm->hc_max_frame_size = 0xc00;
>
>
> SAITOU Toshihide
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