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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Instrumentation X

HK 45.1: Vortrag

Donnerstag, 30. März 2017, 14:00–14:15, F 072

Unified Communication Framework (UCF) — •Dominic Gaisbauer, Igor Konorov, Dymtro Levit, and Stephan Paul — TUM Institute for Hadronic Structure and Fundamental Symmetries, Garching, Germany

UCF is a unified network protocol and FPGA firmware for high speed serial interfaces employed in Data Acquisition systems. It provides up to 64 different communication channels via a single serial link. One channel is reserved for timing and trigger information whereas the other channels can be used for slow control interfaces and data transmission. All channels are bidirectional and share network bandwidth according to assigned priority. The timing channel distributes messages with fixed and deterministic latency in one direction. From this point of view the protocol implementation is asymmetrical. The precision of the timing channel is defined by the jitter of the recovered clock and is typically in the order of 10-20 ps RMS. The timing channel has highest priority and a slow control interface should use the second highest priority channel in order to avoid long delays due to high traffic on other channels. The framework supports point-to-point connections and star-like 1:n topologies but only for optical networks with passive splitter. It always employs one of the connection parties as a master and the others as slaves. The star-like topology can be used for front-ends with low data rates or pure time distribution systems. In this case the master broadcasts information according to assigned priority whereas the slaves communicate in a time sharing manner to the master.