2009-08-25 10:13:14 /dev/video0
Steven Sheppard (UNITED STATES)
Message: 79194
I'm trying to get the OV9655 camera (Surveyor Camera) to work with my Bluetechnix CM-BF537E Board. I followed all of the instructions on this page:
docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:v4l_blackfin_camera
But I can't get /dev/video0 to show up.
root:/> modprobe i2c-bfin-twi
i2c-bfin-twi i2c-bfin-twi.0: Blackfin BF5xx on-chip I2C TWI Contoller Driver, Ve
rsion 1.8, regs_base@ffc01400
root:/> modprobe blackfin-cam
Linux video capture interface: v2.00
OV9655: detecting client on address 0x60
OV9655: V4L driver Blackfin CMOS Camera now ready
OV9655: i2c driver ready
root:/> cd dev/
root:/dev> ls
console gpio18 gpio29 gpio4 gpio8 ram10 ram8
full gpio19 gpio3 gpio40 gpio9 ram11 ram9
gpio0 gpio2 gpio30 gpio41 kmem ram12 random
gpio1 gpio20 gpio31 gpio42 kmsg ram13 root
gpio10 gpio21 gpio32 gpio43 mem ram14 sport0
gpio11 gpio22 gpio33 gpio44 mtd0 ram15 sport1
gpio12 gpio23 gpio34 gpio45 mtd0ro ram2 tty
gpio13 gpio24 gpio35 gpio46 mtdblock0 ram3 ttyBF0
gpio14 gpio25 gpio36 gpio47 null ram4 ttyBF1
gpio15 gpio26 gpio37 gpio5 pts ram5 urandom
gpio16 gpio27 gpio38 gpio6 ram0 ram6 zero
gpio17 gpio28 gpio39 gpio7 ram1 ram7
root:/dev>
Any help or advice would be greatly appreciated. As I've posted before: I'm very new to this, so please talk down to me.
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2009-08-25 10:16:29 Re: /dev/video0
Steven Sheppard (UNITED STATES)
Message: 79196
BTW, I'm using dist 2008R1.5-RC3
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2009-08-25 10:21:45 Re: /dev/video0
Steven Sheppard (UNITED STATES)
Message: 79197
OK. I got the video0 to appear using the command:
mknod /dev/video0 c 81 0
I found that on a forum post, and I'm not sure what the "c 81 0" stand for. However, I don't seem to be able to open it.
root:/dev> v4l_test
usage: video_cap [-r <frame_rate>] [-o <output file>]using default setting: coul
dn't allocate bottom buffer - kernel start address too low
capture rate: 30, height: 288, widht: 352
open /dev/video0
cannot open /dev/video0
root:/dev>
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2009-08-25 10:26:10 Re: /dev/video0
Mike Frysinger (UNITED STATES)
Message: 79199
please search the forums. people have already debugged this camera module and found the I2C vs SCCB to be problematic.
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2009-08-25 10:56:05 Re: /dev/video0
Steven Sheppard (UNITED STATES)
Message: 79202
I read throught some of that, and this doesn't seem to be the problem. When I run the camera driver it seems to work perfectly. In fact, on the SVR1 board, I could just run v4l_test and it went and captured. After my last try I went and set the kernel start address to 0x400000, which is the SVR1 default. The V4L setup page said to use 0x100000.
Now the /dev/video0 opens, but I'm getting an error.
root:/dev> v4l_test
usage: video_cap [-r <frame_rate>] [-o <output file>]using default setting
capture rate: 30, height: 288, widht: 352
open /dev/video0
found Blackfin CMOS Camera device. (maxsize=1280x1024)
default picture properties: brightness=27714,hue=25441,colour=26219,contrast=282
65,depth=16, palette=9.
could not set picture properties: Invalid argument
unsupported video pixel format.
root:/dev>
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2009-08-25 11:21:16 Re: /dev/video0
Michael Hennerich (GERMANY)
Message: 79205 We added this driver from a patch someone submitted - it was never
tested by us.
In case the sensor delivers data after Power On Reset -
Then the driver would only work in its default resolution 1280x1024 with
VIDEO_PALETTE_UYVY.
-Michael