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usb webcam can't work on DM365

Hello :

I have a problem with usb webcam working on dm365.
I load usbcore and musb_hdrc modules first, then I plug in the usb webcam.
After that I load the usb webccam driver module gspca.ko, I got the following messages:

/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: USB GSPCA cam
era found.(ZC3XX)
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [spca5xx_prob
e:4275] Camera type JPEG
/home/pencil722/獢/DM365/useful/gspcav1-20071224/Vimicro/zc3xx.h: [zc3xx_con
fig:669] Find Sensor HV7131R(c)
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [spca5xx_getc
apability:1249] maxw 640 maxh 480 minw 160 minh 120
usbcore: registered new driver gspca
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: gspca driver
01.00.20 registered

I think this message means the usb webcam devices is working with the driver.
And I can see the /dev/video.
But When I ran the DVSDK sample code encode, I got the following error message:

/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: init isoc: us
b_submit_urb(0) ret -28
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [gspca_set_is
oc_ep:945] ISO EndPoint found 0x81 AlternateSet 6
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: init isoc: us
b_submit_urb(0) ret -28
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [gspca_set_is
oc_ep:945] ISO EndPoint found 0x81 AlternateSet 5
/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [spca50x_move
_data:1611] ISOC data error: [1] len=0, status=-18

/home/pencil722/獢/DM365/useful/gspcav1-20071224/gspca_core.c: [spca50x_move
_data:1611] ISOC data error: [2] len=0, status=-18

I don't know what happened? Is the sample code wrong? Or the driver can't work for dm365?
can anyone help solving the problems.

Peter. 

22 Replies

  • In reply to Ajay:

    Hi Ajay,

    As stated by you "DM365 doesn't support high bandwidth iso transfer.", does it means usb wifi modules will also not work properly?

    Actually right now we are struggling with RTL8187L and RTL8188RU based USB wifi modules. Driver is ported successfully but after sometimes when load increases the Wifi modules behaves weird with  disconnections and it can only be reconnected after reboot.


    I am using DM365EVM with DVSDK 4.02  

  • In reply to Ajay:

    Ajay,

    how much is the maximum rate of isochronous transmission by DM365?

    8MBps?


    Can we transfer raw 720p frames over DM365 usb over Bulk transport in UVC?

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