Hi James,
On 12/15/2011 10:49 AM, James wrote:
Hi Michael,
On Thu, Dec 15, 2011 at 3:58 PM, Michael Jones
<michael.jones@xxxxxxxxxxxxxxxx> wrote:
Hi James,
On 12/15/2011 08:14 AM, James wrote:
Hi all,
I'm using an OMAP3530 board and a monochrome 12-bit grey sensor.
Can anyone enlighten me why is the 12-bit grey formats at the CCDC
input (Y12) is truncated to Y10 at the CCDC output?
There are 2 CCDC outputs: CCDC_PAD_SOURCE_OF and CCDC_PAD_SOURCE_VP. Only
the VP (video port) truncates data to 10 bits, and it does that because the
subdevs it feeds can only handle 10 bits max.
Thank you for the clarification.
I need to read the entire RAW 12-bit grey value from the CCDC to
memory and the data does not pass through other OMAP3ISP sub-devices.
I intend to use Laurent's yavta to capture the data to file to verify
its operation for the moment.
Can this 12-bit (Y12) raw capture be done?
Yes. If you are writing the 12-bit gray value directly into memory, you will
use SOURCE_OF and can write the full 12-bits into memory. You need to set
up your media pipeline to do sensor->CCDC->OMAP3 ISP CCDC output.
Is there further modification needed to apply to the OMAP3ISP to achieve this?
Do you have an application to test the pipeline for this setting to
simple display?
Let's establish where you're coming from. Are you familiar with the
media controller? Laurent has a program 'media-ctl' to set up the
pipeline (see http://git.ideasonboard.org/?p=media-ctl.git). You will
find many examples of its usage in the archives of this mailing list.
It will look something like:
media-ctl -r
media-ctl -l '"OMAP3 ISP CCDC":1 -> "OMAP3 ISP CCDC output":0 [1]'
media-ctl -l '"your-sensor-name":0 -> "OMAP3 ISP CCDC":0 [1]'
you will also need to set the formats through the pipeline with
'media-ctl --set-format'.
After you use media-ctl to set up the pipeline, you can use yavta to
capture the data from the CCDC output (for me, this is /dev/video2).
-Michael
MATRIX VISION GmbH, Talstrasse 16, DE-71570 Oppenweiler
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