What sort of wifi dongle are you using ? -----Original Message----- From: Andreas Auer [mailto:[email protected]] Sent: mardi 13 avril 2010 14:28 To: Stephane Cerveau Cc: [email protected] Subject: Re: UVC webcam problem
My problem is that the I can connect to an access point with WIFI but after requesting an IP address from the DHCP server I get disconnected. I get also disconnected if I use a static IP and try to download a file or do something else. Afterwards, wpa_supplicant is not able to find an access point. I get the message from syslog (logread): "No probe response from AP 00:22:3f:7e:31:f2 after 500ms, disconnecting." Best regards, Andreas Stephane Cerveau schrieb: > Hi, > > I also encounter a WIFI USB issue. What sort of issue are you > encountering ? > On my side, I download a large file from WIFI to a MSC device and after > a while, the MSC is disconnected... Indeed I encounter a STALL or a > ERROR in either TXCSR or RXCSR... > I'm still digging to understand what exactly happen. > When I download from WIFI and put the result into /dev/null and read the > MSC in the mean while, I do not encounter any problem. It seems that the > problem comes from TX/RX multiplexing with different timing or buffer > size... > > > Best regards > > Stephane > > -----Original Message----- > From: Andreas Auer [mailto:[email protected]] > Sent: mardi 13 avril 2010 14:02 > To: [email protected] > Subject: Re: UVC webcam problem > > Right now, I tried to use the USB driver (the musb folder) from the > arago kernel. With this driver I can capture the video from the webcam. > So, something important must be different! > > BUT, as I already mentioned I had a problem with "USB WLAN sticks" when > I use the arago kernel. And this is also the case if I use the USB > driver from the arago 2.6.32 kernel with the khilman 2.6.34 kernel. > > But I need to use USB WLAN devices together with USB webcams. Maybe > someone could help me to get this running! > > One thing a forgot to mentionabout the used hardware is that I have a > USB hub IC (ISP1521) between my USB devices and the USB host interface > of the Davinci processor. Maybe this hub chip makes also some problems. > > Thanks for your help so far, > Andreas > > PS: I also tried to adjust the FIFO buffers but this was not the > solution. > > PPS: Maye, I should write a new post for the WLAN problem!? > > > Subbrathnam, Swaminathan schrieb: >> Andreas, >> >> Pl. ensure that the FIFO is configured correctly. Probably this error > could mean you need a 1024 byte fifo space and it is not available. If > so increase the fifo space in musb_core.c file. >> Regards >> Swami >> >>> -----Original Message----- >>> From: davinci-linux-open-source- >>> [email protected] > [mailto:davinci-linux-open- >>> [email protected]] On Behalf Of >>> Andreas Auer >>> Sent: Tuesday, April 13, 2010 2:32 PM >>> To: Markus Rechberger >>> Cc: [email protected] >>> Subject: Re: UVC webcam problem >>> >>> Markus Rechberger schrieb: >>>> On Tue, Apr 13, 2010 at 10:27 AM, Andreas Auer <[email protected]> >>> wrote: >>>>> Hi, >>>>> >>>>> I'm trying to get a UVC webcam working with the latest khilman > kernel >>>>> (2.6.34) on a Davinci EVM like board with DM6446 processor. >>>>> >>>>> I'm able to request the buffers and queue them without errors. But > if I >>>>> switch on the streaming the UVC driver tells me: >>>>> "uvcvideo: USB isochronous frame lost (-18)." >>>>> >>>>> Some time ago, I tried the 2.6.32 kernel from the arago project and >>> webcam >>>>> capturing was working out of the box but WLAN was not working. (so, > I >>>>> switched to the khilman kernel). >>>>> >>>>> Maybe, someone can help me with the uvc webcam problem!!! >>>>> >>>> with our tests the DM6446 only supported up to around 4.5 mbyte of >>>> isochronous data... >>>> Raw Analog TV 720x576x25 requires around 170 mbit, I guess webcams > are >>>> near to that level there's no chance to get such a thing work. >>>> Maybe MJPEG or MPEG based devices can work with it. >>> Thanks for your reply. I have a Logitech QuickCam Communicate Deluxe >>> with MJPEG format. And this webcam is working with the 2.6.32 kernel >>> from the arago project. So, I think this cam should be working. >>> >>> Does anyone know what's the above "status code" -18 means?? >>> >>> Thanks, >>> Andreas >>> _______________________________________________ >>> Davinci-linux-open-source mailing list >>> [email protected] >>> > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 5024 (20100413) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 5024 (20100413) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ -- DI Andreas Auer Embedded Software Developer [email protected] ZYDACRON Austria GmbH St.-Peter-Guertel 4, 8042 Graz, AUSTRIA http://www.zydacron.com _____________________________________________________________________ CEO: Mag. 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