Direct Access to Allied Vision via V4L2

[user159348]

Hi
I have an allied vision camera and I want to work with v4l2 to access it. Since I need to set some special parameters in the camera , I should use “Direct Access Registry”.
I studied the whole of document but actually I have no idea how I should implement this to set my desired parameter.
Can anyone help me?
Bests

[ShaneCCC]

Looks like it’s USB camera. For USB camera there’s no way to do that if vendor didn’t implement the specific function via CID.

[user159348]

@ShaneCCC

CID

Hi

We have an Allied Vision CSI-2 camera (Not a USB camera).

According to this document:

Alvium_CSI-2_Register_Controls_Reference.pdf

It supports direct register access.

I have no idea how to access to these registers.

Is it possible to read/write to these registers using busybox devmem tool?
Actually I want to do something like this thread:

Read CSI Register on Jetson Tx2

Hi, I’m trying to read CSI registers on the TX2 using devmem2 tool. The following CSI registers were attempted : CSI memory base address as per TX2 TRM : 0x150c0000 Register offset: 0x4027 Register byte offset : 0x1009C Resultant address : 0x150D40C3. I have followed the following thread https://forums.developer.nvidia.com/t/debugging-csi-on-tx1/59308 . As per this thread, we can only access the 32-bit address i.e. end with the 4 times like 0, 4, 8, C. So, I have executed following com…

[ShaneCCC]

OK, then you can reference to ov5693 to add the debugfs to access the REG

[user159348]

Thanks. I got your answer and I’m trying to implement.