Hello.
I installed the drivers for the OV9821 using UC788 RevB board (SKU: B0224) . Whenever I run libcamera-hello I get a return signal.
Now I would like to try with the external trigger. But, whenever I run v4l2-ctl -d /dev/v4l-subdev0 -c trigger_mode=1
I get the return message: unknown control 'trigger_mode'
.
And, in effect, when I run v4l2-ctl -d /dev/v4l-subdev0 --all
I see no option to turn on a trigger mode.
(only to change exposure, and flip the image vertically or horizontally)
When I reffer to the documentation, I see only the [B0348], [B0353] and [B0381] as supported SKUs, not mine.
But then, in the same page I see the UC788 and the OV9821 as supported!!
So, I guess I’m having trouble understanding if:
-
Something went wrong with the installation, despite the fact that I have reinstalled the drivers multiple times
-
I bought the wrong article, and should’ve bought the supported boards
-
The documentation is the one that is wrong or out of date.
Also, regarding the documentation:
At the start they say that the voltage of the trigger signal is 1.8V, and that I should convert my 3.3V control signal. But then the connection diagrams show a direct connection from the raspberry pi pins to the XVS pin from the camera module (UC 788) !
Can anyone clarify?
Extra: I choosed to use the OV9821 sensor because it has a high framerate (120 FPS) and a good enough pixel count (1MP). I guess I should choose B0348 if it turns out that I picked the wrong sensor?
Thanks for clarifiying