New Delayed Helicity Readout Scheme for Physics Events Trigger

Paul King has this outline for a new scheme to readout the delayed helicity for Physics Events Trigger (instead of using Scalers RingBuffer):

Running in background:

• On Pattern Start:

1. Increment pattern counter
2. Grab reported helicity
3. Push onto running seed (30-bit)
4. Clear pattern phase counter

• On T_Settle Transition:

1. Increment pattern phase counter
2. Increment T_Settle counter

Then, when a physics event triggers DAQ:

• On CODA Event:

1. Report current seed value
2. report current pattern phase
3. Report current pattern and T_Settle counters