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    Developer's meeting

    → Europe/Zurich
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    CERN status & plans:

    • want to start using data file (data generated using Milo's FrameGenerator) as input to FELIX
      • discussion on rationale behind this.. but FELIX developers prefer not to change their software
    • more concretely, the near-term plan is to
    1. have Milo's FrameGenerator use NetIO to send data to the BoardReader
    2. use simulated data from file, through the FELIX back-end only (using NetIO) to the BR
    3. use simulated data, but use optical link loop-back to send data through the FELIX card (and the FELIX back-end + BR)
    • missing information about setting up optical links (and also setting up the card and configuring loopback)
      • request to put code on github and branch off artdaq v2_00_00 (this is what Eric has branched from)
      • making NetIO into a ups product would be helpful (Roland can investigate)
      • discussed software setup
    • discussion: BoardReader software should be implementable using only a single circular buffer
      • compression is then to be done after the Event Builder request
      • needs a sufficiently large circular buffer

    PNNL status & plans:

    • significant issues getting drivers to work (on different system than what they were developed for): required rebuilding
    • added fragment type (copying from the ToyFragmentGenerator), turning the 3x2x2 demo into a 4x2x2 system
      • both Eric and Roland found (after doing things the hard way) that there is a Ruby script that can help with this
    • now runs, but dumps core if memcpy() is actually used
      • NB: the 3x2x2 demo now works properly, but it needed opening a port (artdaq wiki has been updated to reflect this)
    • would want to use Milo's data
      • discussion on how to use this -- need to be able to decode the data frames. To be followed up offline

    AOB:

    • Monday's DAQ meeting: JJ mentioned that simply determining the entropy of the data should give a good idea of achievable compression
      • agree that this would be useful
    • propose to use protodune-felix e-group for future meeting communication
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