Datasheet

Autofocus interface

The camera supports one-shot autofocus and continuous autofocus modes.

The Dev Board's sysfs node for the autofocus hardware is at

/sys/module/ov5645_camera_mipi_v2/parameters/ov5645_af and it reads back the decimal representation of the

status register in the autofocus hardware. The read values are as follows.

To change the autofocus mode, write one of the following values to the

/sys/module/ov5645_camera_mipi_v2/parameters/ov5645_af file as follows.

For example, the following command enables continuous autofocous:

echo 2 > /sys/module/ov5645_camera_mipi_v2/parameters/ov5645_af

Version 1.0 (August 2019)

Table 2. Autofocus read values from sysfs node

Read value Description

0 (0x00) Autofocus is running.

16 (0x10) Autofocus is complete (focused).

32 (0x20) Analyzing the image. This state occurs intermittently when attempting to reach focus. It occurs

once during one-shot autofocus mode before focus locks, and it is the steady state during

continous autofocus mode.

112 (0x70) Idle. Focus is released and the lens is at it's resting (furthest) position.

Table 3. Autofocus write values for sysfs node

Write value Description

0 Turn off autofocus.

1 Enable one-shot autofocus mode. The camera will seek focus and then lock focus. (It will analyze

the image once, and focus once.)

2 Enable continuous autofocus mode. The camera will continously seek focus. (It will analyze the

image and focus, then continue to analyze the image and refocus when necessary.)