Page History

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• look at configured parameters using (for example) "hsdpva DAQ:LAB2:HSD:DEV06_3D:A"
• for kcu firmware that is built to use both QSFP links, the naming of the qsfp's is swapped.  i.e. the qsfp that is normally called /dev/datadev_0 is now called /dev/datadev_1
• HSD is not configured to do anything (Check the HSD config tab for no channels enabled)
• if hsd timing frames are not being received at 926kHz (status here), click TxLink Reset in XPM window.  Typically when this is an issue the receiving rate is ~20kHz.
• The HSD configuration partition number does not match platform number in .cnf file (Check the HSD "base" tab)
• also check that HEADERCNTL0 is incrementing in "status" tab of HSD cfg window.
• in hsd window timepausecnt is number of clocks we are dead
• in hsd expert window "full threshold(events)" sets threshold for hsd deadtime
• in hsd status window "fex free events" and "raw free events" are the current free events.
• in hsd status window "write fifo count" is number of timing headers waiting for HSD data to associate.
• "readcntsum" on hsd timing tab goes up when we send a transition OR L1Accepts. "trigcntsum" counts L1Accepts only.
• check kcuStatus for "locPause" non-zero (a low level pgp FIFO being full).  If this happens then:  configure hsd, clear readout, reboot drp node with KCU

update on variables in hsdpva gui from Matt (06/05/2020):

• under timing tab look at timpausecnt
  • timpausecnt (clock ticks of dead time)
  • trigcnt: triggers over last second
  • trigcntsum: total l1accept
  • readcntsum: number of events readout total
  • msgdelayset: (units: mhz clock ticks) should be 98 or 99 (there is an "off by one" in the epics variable, and what the hsd sees).  if too short, trigger decision is made too early, and there isn't enough buffering in hsd (breaks the buffer model)
  • headercntof: should always be zero (ben's module).  non-zero indicates that too many l1accepts have been sent and we've overwritten the available buffering
  • headercntl0: sum of number of headers received by ben's module.
  • headerfifor: the watermark for when ben's stuff asserts dead time
  • fulltotrig/nfulltotrig:  counters to determine the round trip time from sending an event to getting back the full signal (depends on fiber lengths, for example).  nfulltotrig is same thing but with opposite logic.
• pgp tab:
  • loclinkrdy/remlinkrdy should be ready
  .  tx
  • tx/rx clk frequencies should be 156.
  • txcnt: counts per second of things being send, but only 16 bits so doesn't really display right value
  .  txcntsum
  • txcntsum is transitions and l1accepts (only 16 bits so rolls over frequently)
• buffers tab:
  • freesz: units of rows of adc readout (40samples*2bytes).
   freeevt
  • freeevt: number of free events.  if they go below thresholds set in config tab: dead time.
• flow tab: matt will refresh his memory and let us know

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