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Matt says for the NEH system: For slot 2,

source /afs/slac/g/reseng/IPMC/env.sh
fru_deactivate shm-daq-drp01/2
fru_activate shm-daq-drp01/2

This doesn't work for the new crate in TMO (don't know why yet), so we have to do:

ssh root@shm-tmo-daq01
clia deactivate board 2
clia activate board 2

Then have to restart the base processes so that the timing system can reload it's default constants from the database (e.g. msgdelays which protect the buffering)

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Opal

debugging 100% deadtime with larry

https://github.com/slaclab/cameralink-gateway#pgp-channel-mapping

Look in Hsio->PgpRxAxisMon[0]->Ch[1]->FrameCnt to see frames from FEB.
Ch[0] is register for FEB
Ch[2] is the UART

ClinkPcie->Application->AppLane[0]->EventBuilder->DataCnt[0] increments with EITHER a trigger message or a transition message
DataCnt[1] increments when we have camera data. Should be equivalent to the PGP FrameCnt above
Above only increment after the event-builder has done its job

Setting Bypass to 1 turns off the event builder (bit mask, per-lane):
bit 0 to 1 bypasses timing
bit 1 to 1 bypasses the camera

tdest lane mapping:

https://github.com/slaclab/cameralink-gateway/blob/master/firmware/common/rtl/AppLane.vhd#L109-L111

Tried hitting
Commands->ClinkDevRoot->ClinkPcie->Application->Applane[0]->Eventbuilder->CntRst
didn't help

When we get struck
TriggerEventBuffer[0]=>FifoPause goes True
TriggerEventBuffer[0]=>XpmPause goes True

setting EventBuilder->Blowoff True resets

Using groupca to send a transition causes
TriggerEventBuffer[0]=>TransitionCount to increment, and
TriggerEventBuffer[0]=>FifoWrCount to increment

Check that TrigerEventBuffer[0]->Partition is set to right readout group

Try toggling between XpmMini and LCLS2 timing

Check TimingRx->RimingFrameRx->RxLinkUp is 0x1

Check ClinkTop->LinkLockedA=True
Check ClkInFreq and ClinkClkFreq are 80Mhz

ClinkTop->Ch[0]:
LinkMode Base
DataMode 12Bit
FrameMode Frame
TapCount 0x2
DataEn True
BaudRate 57600
FrameCount increments with L1Accepts, but not if deadtime.

Not Understood Failure Modes

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