enable csi camera on A20-SOM EVB
The csi camera on the debian image with kernel 3.4.79+ from olimex doesn't work. To make it works, we need to change the configuration in script.bin and /etc/modules. We must convert script.bin to script.fex using bin2fex tools to change the configuration.
olimex@a20-Lime2-SOM:~$ bin2fex script.bin script.fex...
[csi0_para]
csi_used = 1
...
Convert back script.fex to script.bin.
olimex@a20-Lime2-SOM:~$ fex2bin script.fex script.bin
Add the following value in the /etc/modules file:
gt2005
sun4i_csi0 i2c_addr=0x78 ccm="gt2005"
After that, we can reboot the board. Wait a couple second, and voila...the csi camera will now work.
But there is still error message from the kernel log as follow:
[CSI_ERR]input index invalid!
Nevertheless, the csi camera works fine, if someone know how to solve this error, please let me know.
Comments
This information is very helpful. We are considering this board for our development. However, there is NOT much information about the camera and the hardware interface to the CSI or Parallel camera. Would it be possible to provide some pointers/inputs about the camera used and how it was connected and any other information/issues that one should be aware of to connect such camera?
Thanks and any input will be appreciated.
I have a strange issue. If I put the modules into the /etc/modules file or load them through rc.local init script then the image is very green-ish (example: http://picpaste.com/web-cam-shot-W6WXunDH.jpg ). But if I load the sun4i_csi0 by hand (modprobe), then I see the correct colors.
Did anyone experienced anything similar?
Thanks in advance!
Do you use the latest image from olimex?If yes, it might be a conflict. Latest image from olimex has enabled this feature. Or try to put it on the last line of /etc/modules
The sun4i_csi0 is in the last line in the /etc/modules (I even tried to load it with rc.local with a 60 sec sleep before the modprobe command).
I just find that if I start the ffmpeg while the "green state", I get this error message (dmesg):
[ 47.792902] [CSI_ERR]buffer count is invalid, set to 5
<6>[CSI]buffer_setup, buffer count=5, size=1382400
[ 47.802735] [CSI]buffer_setup, buffer count=5, size=1382400
<6>[CSI_ERR]No active queue to serve
[ 48.674898] [CSI_ERR]No active queue to serve
<6>[CSI_ERR]No active queue to serve
[ 48.805972] [CSI_ERR]No active queue to serve
<6>[CSI_ERR]No active queue to serve
[ 48.937044] [CSI_ERR]No active queue to serve
After I load the modules by hand, I get these:
[ 72.071463] [CSI_ERR]buffer count is invalid, set to 5
<6>[CSI]buffer_setup, buffer count=5, size=1382400
[ 72.081337] [CSI]buffer_setup, buffer count=5, size=1382400
without the "No active queue to serve" message.