AXIOM Beta Firmware Version 2.0
1 Prepare Micro SD Card
- Get a new Micro SD card (4GB is enough, bigger is fine as well, but the partitions are not yet automatically resized when a bigger SD card is detected).
- Acquire the latest automatically built firmware image from: https://github.com/apertus-open-source-cinema/axiom-beta-firmware/releases - don't be alarmed by the name "Unstable Development Snapshot" it just means the firmware has been automatically built without human interaction.
- Download, install and start Etcher: https://www.balena.io/etcher/
- Flash the acquired image to a new Micro SD card with Etcher (we highly recommend not overwriting the Micro SD card you currently use in your AXIOM Beta).
- After flashing put the Micro SD card into the AXIOM Beta Microzed SD card slot and power up the Beta.
This new firmware is still in development so expect issues and bugs.
This is the list of current issues/bugs: https://github.com/apertus-open-source-cinema/axiom-beta-firmware/issues
If you find a new bug or have ideas for improvement please add it as github issue (please first check it has not been reported yet).
- Default user is now operator and password: axiom
- Sudo is required to change system/camera settings (like running the various scripts)
- All camera related programs and scripts are now prefixed with
axiom_(for example to run
axiom_set_gain.sh). These scripts/binaries are now executable from anywhere. To find their actual location you can use:
which axiom_set_gain.shor if you want to use the script without caring about where its actually stored you can use:
$(which axiom_start.sh)for example to show the content:
cat $(which axiom_start.sh).
kick_manual.shwas renamed to
halt_manual.shwas renamed to
cmv_snap3was renamed to
axiom_sequencer-start.shstarts the continuous image acquisition (HDMI output).
axiom_sequencer-stop.shstops the continuous image acquisition (HDMI output).
- For example :
./cmv_snap3 -e 20ms -zis now done by typing
sudo axiom_snap -e 20ms -z
- For example :
- Image build log is located in each image under:
- Devicetree source can be found at
/boot/devicetree.dts. To recompile it after any changes use
dtc -O dtb -o /boot/devicetree.dtb /boot/devicetree.dts
- To interrupt the autoboot from u-boot send
Ctrl-Cover serial quickly after a boot / reboot (try holding it down)
axiom_file_check.shdoes an integrity check of /usr, /etc and /opt
- Binaries are linked in:
- Scripts are linked in:
/opt/axiom-firmwarecontains scripts and binaries
- Every AXIOM Beta currently has the same MAC address - a random one should be generated on the first boot, but this is not implemented yet.
- Second Micro SD card slot is enabled by default.
- Factory Calibration Routines have been forked for firmware 2.0: Factory_Calibration_(firmware_2.0)
2.1 FPGA Bitstreams
- FPGA bitstreams are located in
/usr/lib/firmwareand softlinked to from
- *.bit files (from old firmware) need to be converted to *.bin files (for new firmware) with:
/opt/axiom-firmware/makefiles/in_chroot/to_raw_bitstream.py -f input_file.bit output_file.binand copied to
- make sure to load new bitstreams as root (
sudo su) and not with
echo $BITSTREAM_NAME | sudo tee /sys/class/fpga_manager/fpga0/firmware
- AXIOM Beta main page.
2.1.1 Switch HDMI Modes (50p/60p <-> 25p/30p)
Create a copy of axiom_start.sh with a new name eg. axiom_start30.sh
cp $(which axiom_start.sh) axiom_start30.sh
In it replace this line:
echo axiom-fpga-main.bin > /sys/class/fpga_manager/fpga0/firmware
by this line (choosing appropriate files: _30 for 25P/30p or _60 for 50p/60p modes):
echo cmv_hdmi3_dual_30.bin > /sys/class/fpga_manager/fpga0/firmware
copy /opt/bitstreams/cmv_hdmi3_dual_30.bin to /lib/firmware:
sudo cp /opt/bitstreams/cmv_hdmi3_dual_30.bin /lib/firmware
execute the new script:
3 Capture Still Images
There is a command-line tool available on the camera called axiom_snap that allows you to capture still images and takes various parameters. The still images are captured in a raw image format called RAW12 or raw16 (deprecated - the CMV12000 only provides 12 bit so using raw16 is not recommended) which is basically just raw pixel data dumped into a file plus an optional metadata block containing image sensor configuration (it is recommended to always store the metadata as it can be useful for the DNG conversion with raw2dng - also its just a tiny amount of data [128x16bit] and might come in handy at a later image processing step.) Note that axiom_snap cannot be utilized via serial console (minicom, screen, etc.). If you want to write images to your host computer, use SSH connection instead.
3.1 axiom_snap parameters
The following parameters are available:
axiom_snap -h This is axiom_snap cmv_snap3 V1.11 options are: -h print this help message -8 output 8 bit per pixel -2 output 12 bit per pixel -d dump buffer memory -b enable black columns -p prime buffer memory -r dump sensor registers -t enable cmv test pattern -z produce no data output -e <exp> exposure times -v <exp> exposure voltages -s <num> shift values by <num> -S <val> writer byte strobe -R <fil> load sensor registers
Images can be written directly to the cameras internal micro SD card like this (10 milliseconds exposure time, 12bit, include metadata registers):
axiom_snap -e 10ms -r -2 > image.raw12
You can also use axiom_snap to change exposure time (to 5 milliseconds in this example) without actually capturing an image, for the that -z parameter is used to not produce any data output:
axiom_snap -z -e 5ms
That axiom_snap writes data to STDOUT makes it very versatile, we can for example capture images from and to a remote Linux machine connected to the Beta via Ethernet easily (lets assume the AXIOM Betas camera IP is set up as: 192.168.0.9 - SSH access has to be set up for this to work with a keypair - this does not work over the serial/USB console)
ssh email@example.com "axiom_snap -2 -r -e 10ms" > snap.raw12
To pipe the data into a file and display it at the same time with imagemagick on a remote machine:
ssh firstname.lastname@example.org "axiom_snap -2 -r -e 10ms" | tee snap.raw12 | display -size 4096x3072 -depth 12 gray:-
Use imagemagick (tested with Version 6 and 7) to convert raw12 file into a color preview image:
cat test.raw12 | convert \( -size 4096x3072 -depth 12 gray:- \) \( -clone 0 -roll -1-1 \) \( -clone 0 -roll -1+0 \) \( -clone 0 -roll +0-1 \) -sample 2048x1536 \( -clone 2,3 -average \) -delete 2,3 -swap 0,2 -combine test_color.png
Use imagemagick (tested with Version 6 and 7) to convert raw12 file into a color preview image (swapped lines from a bug in an earlier version of cmv_snap3):
cat test.raw12 | convert \( -size 4096x3072 -depth 12 gray:- \) \( -clone 0 -roll -1-1 \) \( -clone 0 -roll -1+0 \) \( -clone 0 -roll +0-1 \) -sample 2048x1536 \( -clone 2,3 -average \) -delete 2,3 +swap -combine test_color.png
With raw2dng compiled inside the camera you can capture images directly to DNG, without saving the raw12:
axiom_snap -2 -b -r -e 10ms | raw2dng snap.DNG
Note: Supplying exposure time as parameter is required otherwise axiom_snap will not capture an image. The exposure time can be supplied in "s" (seconds), "ms" (milliseconds), "us" (microseconds) and "ns" (nanoseconds). Decimal values also work (eg. "15.5ms").