Cameras for Raspberry Pi

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Camarray – Arducam 1MP (OV9782 Color) Quad-Camera Bundle Kit

1.Introduction

This Arducam Camarray HAT (supports four inputs) is an upgraded version of the Arducam synchronous stereo camera HAT (supports two inputs). This quad-camera bundle kit aggregates four OV9782 color cameras into one video stream, compared to its counterpart OV9282 monochrome quad-camera bundle kit. So that it is completely synchronized, the output is a standard MIPI CSI-2 interface, which can be connected to Raspberry Pi, Jetson Nano, Jetsno NX, and other platforms.

1 8

2.Hardware

Follow the picture below for hardware connection (refer to the picture below for four-camera OV9281, only the camera is different).

2 7

The HAT can be plugged into the Jetson Nano and powered by a 2×3 row of female sockets through its 2×20 GPIO pin header.

Camera Board

UC 760 camera board sizing

Camarray HAT

Note:

1. Perform any hardware operations on the HAT only when the power is off.

2. Make sure the camera boards keep away from the GPIO pins of Raspberry Pi / Jetson boards to avoid any short issues.

3. Software

3.1. Driver installation

Refe r to the link to install the Arducam driver.

3.1.2. install libcamera

You need to install our libcamera.

./install_pivariety_pkgs.sh -p libcamera_dev
./install_pivariety_pkgs.sh -p libcamera_apps

3.2. Access the camera with libcamera

3.2.1. Perview

libcamera-still -t 0

3.2.2. Save a test picture after 5 seconds preview

libcamera-still -t 5000 -o test.jpg

For more usage of libcamera apps, please refer to the libcamera command.

3.3. Switch Composition Mode

3.3.1. Check I2C node

[email protected]:~ $ i2cdetect -l
i2c-1	i2c       	bcm2835 ([email protected])          	I2C adapter
i2c-22	i2c       	bcm2835 ([email protected])          	I2C adapter
i2c-0	i2c       	i2c-22-mux (chan_id 0)          	I2C adapter
i2c-10	i2c       	i2c-22-mux (chan_id 1)          	I2C adapter

3.3.2. Detect I2C signal

Take i2c 10 node as an example

image 3

3.3.3. Select the Channel

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Example:

# Set to single channel 0
i2cset -y 10 0x24 0x24 0x02
# Set to single channel 1
i2cset -y 10 0x24 0x24 0x12
# Set to single channel 2
i2cset -y 10 0x24 0x24 0x22
# Set to single channel 3
i2cset -y 10 0x24 0x24 0x32
# Set to double channel (single channel 0 and single channel 1)
i2cset -y 10 0x24 0x24 0x01
# Set to double channel (single channel 2 and single channel 3)
i2cset -y 10 0x24 0x24 0x11
# Set to four in one mode (Default)
i2cset -y 10 0x24 0x24 0x00

3.3.4. Test

Single-channel test:

#Single channel test
[email protected]:~ $ i2cset -y 10 0x24 0x24 0x02
[email protected]:~ $ libcamera-still -t 0

After setting the channel, you can directly use the libcamera command to capture images.

Dual-channels test:

#Dual channels test
[email protected]:~ $ i2cset -y 10 0x24 0x24 0x01
[email protected]:~ $ libcamera-still -t 0

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