profiler

Currently only includes StateProfiler, which was made to monitor how much time a state machine spends in each state during execution. Concretely, while the "start" signal is high, this component monitors the value of a signal ("probe") every cycle and increments the internal counter indexed at this value. To readout the counter values, set the "sel" input to the desired state number (or probe value) and the number of cycles spent with probe=value will appear on "count".