V4L2 Control Functions - ArduCAM OV7251 Manual

0.31MP OV7251 MIPI CAMERA MODULE

7.3.3 V4L2 Control Functions

Arducam OV7251 camera driver supports a list of V4L2 control functions, and you can check the
supported functions using the following commands:
1. Check supported resolution
v4l2-ctl --list-formats-ext
2. Check the supported controls
v4l2-ctl -l
3. Manual Exposure Setting
v4l2-ctl -c exposure=0x50
4. Manual Gain Setting
v4l2-ctl -c gain=0x02
5. Mirror
v4l2-ctl -c horizontal_flip=1
6. Flip
v4l2-ctl -c vertical_fli=1
7. Sensor Register Access
First, you have to set the address of the register to be accessed, for example, 0x0202 in our case
v4l2-ctl -c register_addr=0x0202
Read the value from 0x0202 register
v4l2-ctl -C register_val
Write the value to 0x0202 register
v4l2-ctl -c register_val=0x01
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