DAQ++:: A C++ data acquisition software framework

This paper describes DAQ++, a C++ based framework for developing data acquisition software. The design of DAQ++ is fully object oriented (00) and provides a hierarchy of objects that allow a full control of the acquisition system and, also, on-line monitoring and storage of data. Being an 00 system, it is easy to extend the DAQ system over several machines using a CORBA based architecture which is also provided by DAQ++. Finally, the paper describes a DAQ software system, VMEDAQ, developed with DAQ++ for the data acquisition in the CIMA collaboration. It provides a GUI which controls the objects based on the DAQ++ hierarchy. VMEDAQ has been built in a modular way which allows to add dynamically user defined data producers or DAQ++ Modules and, even, data receivers or RunManagers that allow to define different data acquisition modes like, for instance, parameter scanning.