Configure MIPI Interfaces
Note
Please install or upgrade sima-cli before continuing. This guide is intended for use with the latest sima-cli version.
Note
This procedure requires a host machine with the latest sima-cli version installed. It also requires the firmware version of the Modalix Devkit to be 1.7.0_master_B1965 or above. This is because this build has the necessary .dtbo files to support MIPI.
The Modalix DevKit includes two MIPI Interfaces for connecting MIPI cameras as inputs to the device. The MIPI ports are located directly on the carrier board, and developers would need to follow the procedure below to enable them.
Before starting, make sure to attach a MIPI camera to one of the MIPI ports while the Modalix Devkit is off.
Once connected, connect a serial cable from a host machine to the Modalix Devkit. Afterwards, turn the Modalix Devkit on.
Then, establish a serial terminal with sima-cli and immediately enter uboot by pressing the any key during the 3 second countdown:
sima-cli serial -b 115200
...
Hit any key to stop autoboot: 0
sima$
Once in uboot, set the dtbos variable to the proper Device Tree Blob Overlay .dtbo files corresponding to the carrier board listed below. Afterwards, save the environment and boot into the operating system.
- Waveshare Carrier Board (Rev 1 - Blue Case):
waveshare-carrier-som.dtbo sima$ setenv dtbos pcie-4rc-2rc-2rc.dtbo waveshare-carrier-som.dtbo ; saveenv ; boot
- Waveshare Carrier Board (Rev 1 - Blue Case):
- Seeed Studio Carrier Board (Rev 2 - White Case):
seeed-studio-carrier-som.dtbo sima$ setenv dtbos pcie-4rc-2rc-2rc.dtbo seeed-studio-carrier-som.dtbo ; saveenv ; boot
- Seeed Studio Carrier Board (Rev 2 - White Case):
To validate the interfaces, connect the Modalix SOM to a display and login. Then, connect a MIPI camera to each port and run the following gstreamer pipelines in seperate local terminals. Replace video1 with whatever MIPI port the camera is connected to.
- Decode Raw MIPI Bayer:
sima@modalix:~$ sudo gst-launch-1.0 v4l2src device=/dev/video1raw ! 'video/x-bayer,format=rggb12le,width=2048,height=1080,framerate=30/1' ! fakesink &
- Show Decoded MIPI Output to Display:
sima@modalix:~$ sudo gst-launch-1.0 v4l2src device=/dev/video1out ! 'video/x-raw,format=RGB,width=2048,height=1080,framerate=30/1' ! queue2 use-buffering=true max-size-bytes=4294967295 max-size-time=10000000000 ! videoconvert ! autovideosink &