TI BeaglePlay TEVS Camera Usage Guide

Introduction

TechNexion Embedded Vision Solutions provide embedded system developers access to high-performance, industrial-grade camera solutions to accelerate their time to market for embedded vision projects.

Support Camera Modules

More Camera Products Details...

Support System Version

• BeaglePlay Debian 12.6 2024-07-04 XFCE [kernel 6.6.32-ti-arm64-r7]

Supported TI Development Kit

• BeaglePlay

Install TN Camera on TI Development Kit

Adaptor for BeaglePlay

TEVS-RPI22 Adaptor for TEVS

Connect TEVS camera and TEVS-RPI22 adaptor to BeaglePlay - CSI directly.

Method 1 - Using Technexion Pre-built modules, only for kernel 6.6.32-ti-arm64-r7

1. Make a SD card with "BeaglePlay Debian 12.6 2024-07-04 XFCE" image.

2. Mount boot partition and configure sysconf.txt before the first boot.

$ vim /media/${user}/BOOT/sysconf.txt

> # root_password - Set a password for the root user (not used in ubuntu)
> root_password=root
>
> # user_name - Set a user name for the user (1000)
> user_name=beagle
>
> # user_password - Set a password for user (1000)
> user_password=beagle

3. Boot BeaglePlay with SD card.

4. Download pre-built modules.

$ wget https://download.technexion.com/demo_software/EVK/TI/BeaglePlay/pre-built-modules/latest/tn_camera_module_beagleplay_6.6.32.tar.gz

4. Uncompress the modules.

$ tar -xf tn_camera_module_beagleplay_6.6.32.tar.gz

5. Run installation script.

$ cd tn_camera_module_beagleplay_6.6.32/
$ sh tn_install.sh
[sudo] password for beagle:
****** TechNexion Camera Driver Installation ******
This installation is easy to install TechnNexion Camera Drivers for BeaglePlay.
Before start to install camera driver, You should BACKUP your image and config
to avoid any file you lost while installing process.
Do you want to continue?[Y/n]y
Continuing with the installation...
Install TN-CAM modules: tevs.ko.xz
Installed TN-CAM module file Done.
Install TN-CAM DTBO file: k3-am625-beagleplay-csi2-tevs-rpi22.dtbo
Installed TN-CAM DTBO file Done.
Add TN-CAM Configuration for modules: tevs-rpi22
label microSD (default)
Install TN-CAM service...
Launch TN-CAM Service...
Created symlink /etc/systemd/system/multi-user.target.wants/tn_cam.service → /etc/systemd/system/tn_cam.service.
Finish Camera Driver Installation. Return Code:[1]
You should Reboot Device to enable TEVS Cameras.
Do you want to reboot now?[Y/n]y
Rebooting....

Method 2 - Build drivers from source code (cross-compiling)

1. You can reference BeagleBone Cookbook - The Kernel.

2. Make sure the dependencies.

$ sudo apt install -y git bc bison flex libssl-dev make libc6-dev libncurses5-dev

# Install the 64-bit toolchain for a 64-bit kernel
$ sudo apt install -y crossbuild-essential-arm64

3. Get the kernel sources.

# beagleboard linux kerbel
$ git clone --depth=1 -b v6.6.32-ti-arm64-r7 https://github.com/beagleboard/linux.git

# technexion beagle camera driver
$ git clone --depth=1 -b v6.6.32-ti-arm64 https://github.com/TechNexion-Vision/beagle_devkit_camera_driver.git

4. Copy TN beagle camera driver to beagleboard linux kernel.

$ cp -rv beagle_devkit_camera_driver/drivers/media/i2c/* linux/drivers/media/i2c/
$ cp -rv beagle_devkit_camera_driver/arch/arm64/boot/dts/ti/* linux/arch/arm64/boot/dts/ti/

5. Build sources.

$ cd linux

# default configuration
$ make distclean
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- olddefconfig

# config camera
$ make menuconfig
# -> Device Drivers
#   -> Multimedia support (MEDIA_SUPPORT [=m])
#     -> Media ancillary drivers
#       -> Camera sensor devices (VIDEO_CAMERA_SENSOR [=y])
#         -> TechNexion TEVS sensor support
#            Set "VIDEO_TEVS" to module,
#            Press "m", save to original name (.config) and exit

# build kernel
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- LOCALVERSION="-tn-arm64" -j$(nproc)
$ mkdir -p modules
$ sudo make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- INSTALL_MOD_PATH=./modules modules_install

6. Plug in the SD card which burned "BeaglePlay Debian 12.6 2024-07-04 XFCE" image to PC.

7. Configure sysconf.txt before the first boot.

$ vim /media/${user}/BOOT/sysconf.txt

> # root_password - Set a password for the root user (not used in ubuntu)
> root_password=root
>
> # user_name - Set a user name for the user (1000)
> user_name=beagle
>
> # user_password - Set a password for user (1000)
> user_password=beagle

8. Install onto the SD card.

$ sudo cp arch/arm64/boot/Image /media/$(users)/BOOT/
$ sudo cp arch/arm64/boot/dts/ti/*.dtbo /media/$(users)/BOOT/overlays/
# you can use "make kernelversion" to check kernel version
$ sudo cp -ra modules/lib/modules/$(make kernelversion)-tn-$(git_commit)-dirty/ /media/$(users)/rootfs/lib/modules/
$ sync

9. Boot BeaglePlay with SD card.

10. Modify the extlinux.conf file to add camera configuraion.

$ sudo nano /boot/firmware/extlinux/extlinux.conf

> label microSD (default)
>     kernel /Image
>     append root=/dev/mmcblk1p3 ro rootfstype=ext4 resume=/dev/mmcblk1p2 rootwait net.ifnames=0 quiet
>     fdtdir /
>     fdtoverlays /overlays/k3-am625-beagleplay-csi2-tevs-rpi22.dtbo
>     initrd /initrd.img

Add the overlay to label microSD (default) and append fdtoverlays /overlays/k3-am625-beagleplay-csi2-tevs-rpi22.dtbo after the fdtdir line.

11. Restart system.

$ sudo reboot

Bring up Camera by GStreamer

If you succeed in initialing the camera, you can follow the steps to open the camera.

1. Check the media deivce.

$ media-ctl -d /dev/media0 -p
Device topology
- entity 1: 30102000.ticsi2rx (5 pads, 5 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
        pad0: Sink
                [fmt:UYVY8_1X16/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                <- "cdns_csi2rx.30101000.csi-bridge":1 [ENABLED,IMMUTABLE]
        pad1: Source
                [fmt:UYVY8_1X16/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                -> "30102000.ticsi2rx context 0":0 [ENABLED,IMMUTABLE]
        pad2: Source
                -> "30102000.ticsi2rx context 1":0 [ENABLED,IMMUTABLE]
        pad3: Source
                -> "30102000.ticsi2rx context 2":0 [ENABLED,IMMUTABLE]
        pad4: Source
                -> "30102000.ticsi2rx context 3":0 [ENABLED,IMMUTABLE]

- entity 7: cdns_csi2rx.30101000.csi-bridge (5 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev1
        pad0: Sink
                [fmt:UYVY8_1X16/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                <- "tevs 4-0048":0 [ENABLED,IMMUTABLE]
        pad1: Source
                [fmt:UYVY8_1X16/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
                -> "30102000.ticsi2rx":0 [ENABLED,IMMUTABLE]
        pad2: Source
        pad3: Source
        pad4: Source

- entity 13: tevs 4-0048 (1 pad, 1 link)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev2
        pad0: Source
                [fmt:UYVY8_1X16/640x480@1/60 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range
                 crop.bounds:(0,0)/640x480
                 crop:(0,0)/640x480]
                -> "cdns_csi2rx.30101000.csi-bridge":0 [ENABLED,IMMUTABLE]

- entity 19: 30102000.ticsi2rx context 0 (1 pad, 1 link)
             type Node subtype V4L flags 0
             device node name /dev/video0
        pad0: Sink
                <- "30102000.ticsi2rx":1 [ENABLED,IMMUTABLE]

...

2. List device support formats and resolutions.

# list support format
$ v4l2-ctl -d /dev/v4l-subdev2 --list-subdev-mbus-codes

> ioctl: VIDIOC_SUBDEV_ENUM_MBUS_CODE (pad=0)
>         0x200f: MEDIA_BUS_FMT_UYVY8_1X16

# list support frame size with format
$ v4l2-ctl -d /dev/v4l-subdev2 --list-subdev-framesize code=0x200f

> ioctl: VIDIOC_SUBDEV_ENUM_FRAME_SIZE (pad=0)
>         Size Range: 640x480 - 640x480
>         Size Range: 1280x720 - 1280x720
>         Size Range: 1280x800 - 1280x800

# list support frame intercal with format and resolution
$ v4l2-ctl -d /dev/v4l-subdev2 --list-subdev-frameintervals \
pad=0,width=1280,height=720,code=0x2006

> ioctl: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL (pad=0)
>         Interval: 0.017s (60.000 fps)

3. Bring up the camera (/dev/video0) with 640x480 by Gstreamer pipeline.

$ DISPLAY=:0 gst-launch-1.0 v4l2src device=/dev/video0 ! \
"video/x-raw, format=UYVY, width=640, height=480" ! fpsdisplaysink sync=false

4. Change resolution with 1280x720 and bring up by Gstreamer pipeline directly.

# modify media resoltion
media-ctl -V '"tevs 4-0048":0 [fmt:UYVY8_1X16/1280x720]'
media-ctl -V '"30102000.ticsi2rx":0 [fmt:UYVY8_1X16/1280x720]'

$ DISPLAY=:0 gst-launch-1.0 v4l2src device=/dev/video0 ! \
"video/x-raw, format=(string)UYVY, width=(int)1280, height=(int)720" ! \
fpsdisplaysink video-sink=glimagesink sync=false

Troubleshooting

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