HummingBoard Pulse/Ripple/Pro & i.MX8M Plus - Basler Camera Quick Start Guide

Revision and Notes

Introduction

The following provides a quick guide to start using the Camera Module on your HummingBoard Pulse and i.MX8M Plus SOM.

• For more information, please visit i.MX8M PLUS SOM.

Software Setup

Cable setup and prerequisites

Here are the additional cables and prerequisites you will need for being able to get started with your Camera:

• HDMI / micro - HDMI cable.

• Camera kit ( see our i.MX8M Plus - Camera Kit ).

Image download and SD card preparation

1. Downloading the Yocto image:

Find the latest imx-image-full-*.wic.{zst,bmap} targeting the i.MX8M Plus SoM at images.solid-run.com - e.g. at the time of writing:

2. Writing the image to the SD card

Use the following commands for writing the image to an SD card:

• For more information, please visit Flashing an SD Card .

3. SD card insertion

Please Insert the SD card into your device.

4. Power connection

Connect your power adaptor to the DC jack, and then connect the adaptor to mains supply.

5. Serial Connection

Please insert the micro USB into your device, then you can refer to Serial Connection for installing necessary serial connection software in Linux/Windows.

Once you installed the necessary serial connection software, reboot your device and you should be able to see the following:

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• Please inset ‘root’ as a username for being able to log in as shown in the above picture.

Camera Test

1. Enable Basler Cameras in Software:
   Edit file extlinux.conf on the first partition of the board adding the line starting with “FDTOVERLAYS” - either from a PC, or from the device serial console, then reboot. The resulting file should look similar to the example below (line 5 is the important addition):

   default Yocto label Yocto kernel /Image fdtdir / FDTOVERLAYS ../freescale/imx8mp-sr-som-basler.dtbo ../freescale/imx8mp-hummingboard-pulse-basler.dtbo append root=PARTUUID=076c4a2a-02 rootwait

   
   For editing on device can use nano text editor:

   mount /dev/mmcblk1p1 /boot nano /boot/extlinux/extlinux.conf # save with ctrl+o, exit with ctrl+x sync reboot

2. Connect your HDMI cable.

3. Connect your Camera to the CSI 2.0 of the carrier as shown in the picture below:

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4. Check available devices by running the following on your monitor:

   v4l2-ctl --list-devices # Example Output: (): /dev/v4l-subdev0 /dev/v4l-subdev4 /dev/v4l-subdev5 (): /dev/v4l-subdev1 /dev/v4l-subdev6 /dev/v4l-subdev7 (csi0): /dev/v4l-subdev3 (csi1): /dev/v4l-subdev2 FSL Capture Media Device (platform:32c00000.bus:camera): /dev/media0 mxc-isi-m2m_v1 (platform:32e00000.isi:m2m_devic): /dev/video2 VIV (platform:viv0): /dev/video3 VIV (platform:viv1): /dev/video4 vsi_v4l2dec (platform:vsi_v4l2dec): /dev/video1 vsi_v4l2enc (platform:vsi_v4l2enc): /dev/video0 viv_media (platform:vvcam-video.0): /dev/media1

   The relevant capture devices associated with the cameras are the ones named “VIV (platform:vivX)”:
   - “VIV (platform:viv0)” (/dev/video3): Camera Connector on HummingBoard
   - “VIV (platform:viv1)” (/dev/video4): Camera Connector on System on Module
   If the numbering changed, substitute the video device numbers (3,4) accordingly in the following steps.

5. Render from Camera to HDMI Display with gstreamer:

   # for HummingBoard Camera Connector gst-launch-1.0 -v v4l2src device=/dev/video3 ! "video/x-raw,format=YUY2,width=1920,height=1080" ! queue ! imxvideoconvert_g2d ! waylandsink # for System on Module Camera Connector gst-launch-1.0 -v v4l2src device=/dev/video4 ! "video/x-raw,format=YUY2,width=1920,height=1080" ! queue ! imxvideoconvert_g2d ! waylandsink

6. Run NXP Video Demo to render from Camera to HDMI Display:

   systemctl stop weston weston.socket cd /opt/imx8-isp/bin # for HummingBoard Camera Connector ./video_test -w 1920 -h 1080 -f YUYV -t drm -m 0 -d 3 # for System on Module Camera Connector ./video_test -w 1920 -h 1080 -f YUYV -t drm -m 0 -d 4

Once you run the previous commands, you can direct your camera to an object and start monitoring as shown in the following figure:

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The following is an implementation of what the camera displays on the monitor screen.

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