Timing Week Ahead
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David Cussans is inviting you to a scheduled Zoom meeting.
Topic: DUNE Timing System Week Ahead
Time: Jan 17, 2022 11:00 AM London
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Meeting ID: 656 1190 7988
Passcode: 959532
Present: David Cussans(DGC), Jon Sensenig(JS), Sudan Paramevaran(SP),Jean-Pierre Martin(JPM), Diana Antic, Terri Shaw(TS), Jim Mateyak(JM), James Shen(JaSh), Aaron Bundock(AB).
Interim-PRR ( will cover AFC v4 only)
Documentation template - Sudan
ST has produced a template in Overleaf ( https://www.overleaf.com/read/rdqkpqwnwhts#a368f6 )
What items to test?
* SP has produced skeleton for test results.
* Test two Endpoints on same fibre ?
* Test two endpoints on same FIB
* Test two endpoints on separate FIBs
Functional tests. Measure:-
* Clock jitter
* Measure RTT
* Adjust delay and see 1PPS move.
* Measure how much jitter from each stage is introducing
* Moving clock with fine phase.
* All done - except -
- re-measure clock jitter with LVDS (not TTL)
- jitter on two AFC/FIB boards.
- Jitter on individual clock ( i.e. TIE with software CDR)
- Soak test for a week (does clock move. Do we see bit errors ? )
*** ST will make tags for f/ware and s/ware to give consistent versions for testing.
(Was hoping to merge back to develop before tagging, but unlikely for s/ware. F/ware already merged)
*** Continue to add "cut and paste" instructions for each test in elog.phy.bris.ac.uk/elog
Electrical safety review.
Documents now split into 5
1. Overview
2. uTCA (joint with Dario, except for MCH - we only need 1GBit/s and JSM - which we use and TDE don't)
3. AFC/FIB
4.GIB
5.MIB
AHJ ( Authority Having Juristiction)
QA/QC documentation.
- Information from Creotech (can add to QA/QC docs "as is")
- Need to document how we will test AFC/FIB combination.
( e.g.
* Test voltages on FIB
* Test SFP I2C for all slots
* Test LOS,LOL lines from SFPs
* Check UID reading from FIB
* Check optical signal from SFPs ( eye diagram)
* Functional test of endpoint (Dennis' scripts)
... but written in DUNE QA/QC template
)
Round table:
DL Operations . Daphne issues. (turned out to be firmware ). TLU moved back up to Faraday cage. Probably possible to use one of "new" units in Faraday case permanently.
DA Tested one of the three new 1U units. FOr OKS, implemented into plugins. Next step testing and (in parallel) seeking review by Gordon C.
ST Carrying on with support for fanout design in full chain test (for high-level s/ware). Will have one config file and send one command which will result in all MIB/AFC/FIB being configured. Consolidation work for full chain test.
SP Documentation for testing/results.
DC Review documentation.
AB - no tasks
JaSh - Work on GIB: Completed tests 2 weeks ago can communicate with endpoint. Just purchased NTP--IRIG h/ware (VCL-3045). Requested changes to timing source (since this will propagate everywhere). ST points out that there are sever branches. JaSh confimed that gib-rearrange is the most recent. JaSh asks what registers do we need. JaSh points out clock domain crossing from 10MHz -- 62.5MHz is still an issue. Error could be up to 8 clock cycles of 62.5MHz. Is this an issue? ST points out that spec for FD is 1us. So, ignore for now.
JS - Providing consultancy to JaSh.
JPM - Now able to read IPBus registers. (Took a little while) Has to be able to read out edge information to be able to resolve phase ambiguity. DGC asks if JPM can tidy this up and write some example Python scripts on using phase measurement firmware block.
JM - points out justification of tests also needed (rather than just a list of them).
AOB
ST points out that DUNEDAQ release fddaq-4.3.0. Will need to run regression tests. DL asks which firmware shall we use? He suggests turning relval/7.2.1 (which fixes endpoint addressing bug) into a release. ST will make 7.2.1 before he makes a relval/7.2.2 from develop straight afterwards.
---------------------- OLD
Present: David Cussans(DGC), Stoyan Trilov(ST), Dennis Lidebaum(DL), Jon Sensenig(JS), James Shen(JaSh) Sudan Paramevaran(SP), Aaron Bundock(AB), Jean-Pierre Martin(JPM), Diana Antic, Kevin Fahey.
Full -chain test
ST - fixed some technical issues. Changed architecture of fan-out on AFC/FIB. Feeds data from back-plane into PLL, rather than (to avoid clock/data going out of phase).
Messages passed from MIB --> AFC/FIB --> Endpoint and back.
Clock jitter between two endpoints measured - 50ps.
Can adjust FPGA
Can't use address pins on back-plane to set IP address. DGC to modify soft-core to read IP address from PROM. DGC to move soft core code C for AFC from Enclustra repo. before we make tags.
Issues with locking upstream CDR in MIB to returning data from endpoint. DL suggests using "switch-and-lock" command. ST can't use this directly, since no longer using the physical Mux on board. ST will investigate using
ST will do more work before merging software back to develop. Will test with Nano timing RC.
SP - continuing to write template for tests. Needs another week.
-----------------------
Supporting PD-2
DL and DC talked to:
Nuno - decided not to pass timing messages to laser calibration system. ( Use CCM for veto message)
Zelimir - about using timing system messages to trigger SSP. Want a system in ~ 2-3 weeks that records when timing system emits command.
ST asks will we need to support new hardware (full timing chain).
Old PTCs - tx path from WIBs not properly connected. Problem identified.
ST - need to have a look at Grafana dashboards. Timescale by 2-3 weeks. Action - DL will do the smallest job that will provide useful data.
Kevin Fahey
Present: David Cussans(DGC), Stoyan Trilov(ST), Dennis Lidebaum(DL), Jon Sensenig(JS), Sudan Paramevaran(SP), Aaron Bundock(AB), Jean-Pierre Martin(JPM)
* @J.P. Martin - Use DTS test system in Montreal to integrate fine phase measurement with pdts_upstream_cdr. STATUS: In progress. Next step - connect registers to IPbus , as well as ILA.
* J.P. Martin - Test 2ns phase measurement (initial tests unsuccessful in Bristol and no time to debug.) STATUS: works at SCTR (checking with ILA) . Next step - check this works at IPBus level.
* @dgc - Get back to @Ioannis Xiotidis about issues with ND-Gar endpoint. STATUS: Not done
* @Stoyan Trilov - debug MMC. STATUS - Discovered issue with reset. Paused until after full chain test.
* @dgc - Investigate why hardware input into pc069 not working. STATUS - Fixed. (bugs in I/O block and constraints file. Need complete MR 100. Waiting until consolidation for full chain finished.
* @Diana Antic - Liaise with @kurt.biery about getting the "nanotimingrc in parallel with nanorc" modifications back into dune-daq test framework. STATUS -
* @Diana Antic - Investigate putting all outstanding actions for timing system (hardware/firmware/software/system) into issue tracking system. STATUS -
* @sudan - develop template for recording test results, full chain test (in preparation for interim-PRR ). STATUS - SP has initial template in Overleaf. Will start to fill out in coming weeks.
* @sudan - to link from existing pages to new "Page-1". STATUS - Done.
* @Diana Antic - Work on porting timing system configuration schema to OKS. STATUS - Temporarily on pause. Will go into fddaq 5.0.
* @James Shen - Refactor IRIG decoder. STATUS - Firmware written. Pushed to branch. Needs testing in hardware. : UPDATE: James back at Penn. Done preliminary tests. Plan for more extensive tests in coming week. Jon S. expects IRIG decoder to work, since it worked before refactor and current code passes CI.
* DGC - Finished first draft of documentation for "Safety Engineering Design Review" and sent for comments. Figured out how (technically) to transfer FIB/MIB/GIB designs to Oxford. Submitted documentation requesting permission to share something produced with Europractice licenced Cadence s/ware. Working with Keith Clarke (Bristol) to package three Enclustra/pc069a FMC combinations in 1U crates to enhance hardware available at CERN (pc069a has more I/O which may make it easier to integrate with CRT). At collaboration meeting hope to talk to Terri Shaw (safety approval) , Jack Fowler (GPS antenna location site evaluation at SURF) and Asher / ND team (ND timing system).
* ST - Refactored firmware fanout design ( on AFC/FIB ) in process of testing. Also working on software
* DL - All quiet on the NP front (after burst of activity setting up new scripts for DAPHNE . Old scripts needed modifications since they used fanout, rather than TLU which is connected to DAPHNE). Action: Send message to DAPHNE team to point out can use endpoint monitoring service ( rather than using dtsbutler scripts).
* JS - Reminded us that CTB will be used for data selection triggering. No timing signal at moment. DL said he or DGC could check this when they were at the collaboration meeting next week.
* SP -
* AB -
* JPM
AOB - None.
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Old:
Present: Jim Mateyack (JM) , Jon Sensenig (JS), Stoyan Trilov(ST) , Diana Antic(DA), David Cussans(DC) , Sudan Paramevaran(SP),Dennis Linebaum(DL),Jean-Pierre Martin (JPM)
DC presented some slides on the goals and key dates for 2024 ( see attached PPT). Discussion resulted in: