How to get the DFSDM to trigger the HAL_DFSDM_FilterAwdCallback

[JFoth.1]

I'm using a STM32L475. I have DFSDM data coming in. I'm using the AWD and have set high and low thresholds to trigger an interrupt. I cannot get the interrupt to occur. The DFSDM_FLT1AWSR flags get set. The DFSDM_FLT1ISR->AWDF flag also gets set. Any advise or example code?