You can do this either using the felix UPS product in the dune-daq software or a custom build of the felix software suite provided by ATLAS TDAQ.
To use the UPS product, you can use these tools where you did run:
dbt-workarea-env
to setup the workspace including the ups product.
First a configuration file needs to be generated or acquired. These files have lines of data in the 33b format as well as register values which the command flx-config uses to configure the internal emulator.
To generate simple configurations (incremental data, constant value etc.), you can run the flxlibs_emu_confgen app in flxlibs. By default it produces an emulator configuration files which had incremental data with a chunk size of 472 and 1 idle character between chunks. You can see the specifications of the data generated in the config when running the app, below shows the output after running with default settings.
So if you run:
flxlibs_emu_confgen --chunkSize 472
The output should be similar to this:
chunk size : 472
idle characters : 1
pattern type : 0
output file : emuconfigreg_472_1_0
For information on what can be configured use the -h/--help options. Using the default load the emulator with DUNE-WIB frame sized chunks.
To upload a configuration file to the emulator, use flx-config on the following way:
flx-config -d <device number, 0 or 1> load <config file>
So based on the example above, load the emulator of the 2 SLRs via:
flx-config -d 0 load emuconfigreg_472_1_0
flx-config -d 1 load emuconfigreg_472_1_0
The fanout selector tool is called femu that can toggle the emulator mode on and off.
In order to toggle the fanout selector to use the emulated links instead of the optical links:
femu -d 0 -e
femu -d 1 -e
In order to toggle back to real optical links from the MTP connectors, disable the emulator fanout via:
femu -d 0 -n
femu -d 1 -n