Driver has been developed by TechNexion as an initiative in order to bootup TechNexion MIPI-CSI2 camera modules on Ti starter kit.
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With different board you need prepare match adapter board and cable for the connect pins.
Here is the table for you can easily to confirm what you need for your solution.Developer Kit Adapter board Camera Kit SK-AM62 TEV-RPI15 Adaptor TechNexion Camera EVK RPI15 SK-AM62A-LP TEV-RPI22 Adaptor TechNexion Camera EVK RPI22 SK-TDA4VM TEV-RPI15 Adaptor TechNexion Camera EVK RPI15 Be careful with the RPI22 adaptor board connector, which is compatible with the reverse orientation pin define.
Watch this video to make sure your camera is connected correctly :
Fig. 1.1 The TEV-RPI22 adaptor connection with SK-AM62A-LP Starter Kit.
The SK-TDA4VM board provides 2 RPi headers for camera connection.
Fig. 1.2 The TEV-RPI15 adaptor connection with SK-TDA4VM Starter Kit for Edge AI. -
The release driver have been verified with those ti-processor-sdk-linux version:
- For SK-AM62 :
tisdk-default-image-am62xx-evm.wic.xz (Version: 09.01.00.08 Release date: 18 Dec 2023)
xz -d tisdk-default-image-am62xx-evm.wic.xz - For SK-AM62A-LP :
tisdk-edgeai-image-am62axx-evm.wic.xz (Version: 09.01.00.07 Release date: 18 Dec 2023)
xz -d tisdk-edgeai-image-am62axx-evm.wic.xz - For SK-TDA4VM :
tisdk-edgeai-image-j721e-evm.wic.xz (Version: 09.01.00.06 Release date: 08 Dec 2023)
xz -d tisdk-edgeai-image-j721e-evm.wic.xz
- For SK-AM62 :
Note
If you don't have any specific driver need, you can using TechNexion Pre-built Image
Skip step of driver install and start to using camera quickly !
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The capacity must be higher 16GB and then flash the image.
sudo dd of=/dev/<sd card> if=<Yocto prebuild image> bs=1M status=progress
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$ git clone git@github.com:TechNexion-Vision/tn-ti_6.1.46_09.01.00.006.git $ cd ti_evk_camera/ ~/ti_evk_camera$ git checkout tn-ti_6.1.46_09.01.00.006
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~/ti_evk_camera$ mv -r driver/media/i2c/tevs/ <fetch_kernel_folder>/driver/media/i2c/ ~/ti_evk_camera$ mv arch/arm64/boot/dts/ti/k3-j721e-sk-tevs.dtso <fetch_kernel_folder>/arch/arm64/boot/dts/ti/
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$ cd <fetch_kernel_folder>/driver/media/i2c/ ~/<fetch_kernel_folder>/driver/media/i2c/$ vi Makefile
Add this line in Makefile.
obj-$(CONFIG_VIDEO_TEVS) += tevs/Modify Kconfig to add camera config
~/<fetch_kernel_folder>/driver/media/i2c/$ vi Kconfig
Add this part under "Camera sensor devices" menu in Kconfig.
config VIDEO_TEVS tristate "TechNexion TEVS sensor support" depends on OF depends on GPIOLIB && VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API depends on MEDIA_CAMERA_SUPPORT default y select V4L2_FWNODE help This is a Video4Linux2 sensor driver for the TechNexion TEVS camera sensor with a MIPI CSI-2 interface. -
$ cd <fetch_kernel_folder>/arch/arm64/boot/dts/ti/ ~/<fetch_kernel_folder>/arch/arm64/boot/dts/ti/$ vi Makefile
Add this line in Makefile.
#For SK-AM62X dtb-$(CONFIG_ARCH_K3) += k3-am625-sk-csi2-tevs.dtbo #For SK-AM62A dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk-csi2-tevs.dtbo #For SK-TDA4VM dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk-tevs.dtbo -
Finally you can start compile your new Image files, then copy and replace the Image files and add camera dtb overlay file in the SD card.
Note
You need specifying the SD card image of dtb overlay file in /run/media/BOOT-mmcblk1p1/uEnv.txt as below,
#For SK-AM62X
name_overlays= k3-am625-sk-csi2-tevs.dtbo
#For SK-AM62A
name_overlays= k3-am62a7-sk-csi2-tevs.dtbo
#For SK-TDA4VM
name_overlays=ti/k3-j721e-edgeai-apps.dtbo ti/k3-j721e-sk-tevs.dtbo
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The display will shown a Ti demo application(Edge AI demo) wallpaper as below.
Fig. 1.3 SK-TDA4VM Starter Kit wallpaper upon boot
Note
The Ti demo application doesn't include TechNexion's cameras.
You can stop and disable this by using systemctl stop edgeai-init.service and systemctl disable edgeai-init.service.
You won't see it the next time reboot.
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$ v4l2-ctl --list-device
Get the device number of camera capture device
#CSI 0 (cam1)
j721e-csi2rx (platform:4504000.ticsi2rx):
/dev/video{X}
#CSI 1 (cam2)
j721e-csi2rx (platform:4510000.ticsi2rx):
/dev/video{X}The following is an example.
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Specify the capture device you just get (/dev/video2) and start gstreamer to get video stream with 640x480 on the display :
$ gst-launch-1.0 v4l2src device=/dev/video2 io-mode=2 ! video/x-raw,width=640,height=480 ! waylandsink sync=false
Note
Usecase
Take TEVS-AR0234 on SK-TDA4VM CAM2 connector for example:
Boot up SK-TDA4VM and check initialization of camera driver.
It shows below messages, the driver is initialized correctly. If the drivers haven't been probed, please check the connector plugin correct.
$ dmesg -t | grep "tevs"The message similar to the following :
root@tda4vm-sk:/opt/edgeai-gst-apps# dmesg|grep tevs
tevs 7-0048: tevs_probe() device node: tevs@48
tevs 7-0048: Version:24.8.0.1
tevs 7-0048: Product:TEVS-AR0234, HeaderVer:3, MIPI_Rate:800
tevs 7-0048: probe success
Try to using media-ctl framework to print the device topology from camera to CSI and the end to video device node.
$ media-ctl -d /dev/media1 -pGet the v4l2-subdev which is camera in this print message and then we can use v4l2-ctl by it.
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For kernel 6.1 architecture you cannot easily change resolution in gsteamer pipeline. You must need to using
v4l2-ctlto do this.$ v4l2-ctl -d /dev/v4l-subdev2 --list-subdev-framesize pad=0
root@tda4vm-sk:/opt/edgeai-gst-apps# v4l2-ctl -d /dev/v4l-subdev2 --list-subdev-framesize pad=0
ioctl: VIDIOC_SUBDEV_ENUM_FRAME_SIZE (pad=0,stream=0)
Size Range: 640x480 - 640x480
Size Range: 1280x720 - 1280x720
Size Range: 1920x1080 - 1920x1080
Size Range: 1920x1200 - 1920x1200 -
media-ctl --set-v4l2 "'tevs 7-0048':0 [fmt:UYVY8_2X8/1280X720@1/30 field:none]"