Software for implementing trigger algorithms on the upgraded CMS Global Trigger System

The Global Trigger is the final step of the CMS Level-1 Trigger andimplements a trigger menu, a set of selection requirements applied tothe final list of trigger objects. The conditions for trigger objectselection, with possible topological requirements on multi-object triggers,are combined by simple combinatorial logic to form the algorithms.The LHC has resumed its operation in 2015, the collision-energy will beincreased to 13~TeV with the luminosity expected to go upto~2$\times$10$^{34}$~cm$^{-2}$s$^{-1}$. The CMS Level-1 trigger systemwill be upgraded to improve its performance for selecting interestingphysics events and to operate within the predefined data-acquisition ratein the challenging environment expected at LHC Run~2.The Global Trigger will be re-implemented on modern FPGAs on an AdvancedMezzanine Card in MicroTCA crate. The upgraded system will benefit fromthe ability to process complex algorithms with DSP slices and increasedprocessing resources with optical links running at~10 Gbit/s, enablingmore algorithms at a time than previously possible and allowing CMS tobe more flexible in how it handles the trigger bandwidth.In order to handle the increased complexity of the trigger menu implementedon the upgraded Global Trigger, a set of new software has been developed.The software allows a physicist to define a menu with analysis-like triggersusing intuitive user interface. The menu is then realised on FPGAs withfurther software processing, instantiating predefined firmware blocks.The design and implementation of the software for preparing a menu for theupgraded CMS Global Trigger system are presented.