  Control and readout of superconducting quantum bits (qubits) require
microwave pulses with gigahertz frequencies and nanosecond precision. To
generate and analyze these microwave pulses, we developed a versatile
FPGA-based electronics platform. While basic functionality is directly handled
within the FPGA, guaranteeing highest accuracy on the nanosecond timescale,
more complex control schemes render impractical to implement in hardware.
  To provide deterministic timing and low latency with high flexibility, we
developed the Taskrunner framework. It enables the execution of complex control
schemes, so-called user tasks, on the real-time processing unit (RPU) of a
heterogeneous Multiprocessor System-on-Chip (MPSoC). These user tasks are
specified conveniently using standard C language and are compiled automatically
by the MPSoC platform when loaded onto the RPU. We present the architecture of
the Taskrunner framework as well as timing benchmarks and discuss applications
in the field of quantum computing.
