Overview
Data Format
At each trigger, the UDP Encoder sends one header structure followed by up to eight channel structures.
See the definitions of encoder_header_t and encoder_channel_t in github: UdpEncoder.hh
Configuring the Timing System
On a DAQ Partition
tprtrig
You can get tprtrig to trigger the EVR on a DAQ partition like so:
$ tprtrig -t a -c 0 -o 1 -d 2 -w 10 -p 4
programs EVR /dev/tpra (-t a) to generate a TTL trigger using logic channel 0 (-c 0) on output 0 (-o 1 [bit mask]) with delay of 2 119MHz clocks (-d 2) and width 10 119 MHz clocks (-w 10) for every L1Accept on partition 4 (-p 4).
Standalone
tprtrig
Generate 1Hz triggers on output 0 with a width of 54 nanoseconds.
$ tprtrig -t a -c 0 -o 1 -d 1 -w 10 -r 6
Testing
Monitoring UDP packets with netcat
-bash-4.2$ hostname drp-neh-cmp015 -bash-4.2$ nc -lvu 192.168.0.8 5006 Ncat: Version 7.50 ( https://nmap.org/ncat ) Ncat: Listening on 192.168.0.8:5006 Ncat: Connection from 192.168.0.3. 'plc-tst-proto6w? ?bdSimEncoder (plc-tst-proto6Q? ?zdSimEncoder )plc-tst-proto6+g ??dSimEncoder *plc-tst-proto6 ??dSimEncoder +plc-tst-proto6 ??dSimEncoder^C -bash-4.2$
Updates to rix.cnf file
$ diff rix.cnf rix.cnf.ENCODER
67a68,69
> { host: 'drp-neh-ctl002', id:'tprtrig', flags:'sp', cmd:'tprtrig -t a -c 0 -o 1 -d 2 -w 10'},
> { host: 'drp-neh-cmp015', id:'encoder_0', flags:'spu', rtprio:50, cmd:f'drp_udpencoder -l 0x8 -o {data_dir} -P {hutch} -d /dev/datadev_0 -C {collect_host}'},
Recording Experiment rixdaq18 Run 23
encoder_0 log file
rix-drp_udpencoder[70415]: <I> UDP receiver thread started rix-drp_udpencoder[70415]: <I> setting lane 0 rix-drp_udpencoder[70415]: <I> PGPReader saw Configure transition @ 985133577.575584342 (0004674c799500) rix-drp_udpencoder[70415]: <I> EbReceiver saw Configure transition @ 985133577.575584342 (0004674c799500) rix-drp_udpencoder[70415]: <I> received key = beginrun Opening file /ffb01/data/rix/rixdaq18/xtc/rixdaq18-r0023-s002-c000.xtc2 rix-drp_udpencoder[70415]: <I> Opening file '/ffb01/data/rix/rixdaq18/xtc/rixdaq18-r0023-s002-c000.xtc2' rix-drp_udpencoder[70415]: <I> Opening file '/ffb01/data/rix/rixdaq18/xtc/smalldata/rixdaq18-r0023-s002-c000.smd.xtc2' rix-drp_udpencoder[70415]: <I> PGPReader saw BeginRun transition @ 985133590.653839154 (0004674d32e3bd) rix-drp_udpencoder[70415]: <I> EbReceiver saw BeginRun transition @ 985133590.653839154 (0004674d32e3bd) rix-drp_udpencoder[70415]: <I> received key = beginstep rix-drp_udpencoder[70415]: <I> PGPReader saw BeginStep transition @ 985133595.531025432 (0004674d77fa30) rix-drp_udpencoder[70415]: <I> EbReceiver saw BeginStep transition @ 985133595.531025432 (0004674d77fa30) rix-drp_udpencoder[70415]: <I> received key = enable rix-drp_udpencoder[70415]: <I> PGPReader saw Enable transition @ 985133600.224320451 (0004674dba80e8) rix-drp_udpencoder[70415]: <I> EbReceiver saw Enable transition @ 985133600.224320451 (0004674dba80e8) rix-drp_udpencoder[70415]: <I> received key = disable rix-drp_udpencoder[70415]: <I> PGPReader saw Disable transition @ 985133613.263120215 (0004674e7336db) rix-drp_udpencoder[70415]: <I> EbReceiver saw Disable transition @ 985133613.263120215 (0004674e7336db) rix-drp_udpencoder[70415]: <I> received key = endstep rix-drp_udpencoder[70415]: <I> PGPReader saw EndStep transition @ 985133613.268625231 (0004674e734afa) rix-drp_udpencoder[70415]: <I> EbReceiver saw EndStep transition @ 985133613.268625231 (0004674e734afa) rix-drp_udpencoder[70415]: <I> received key = endrun rix-drp_udpencoder[70415]: <I> PGPReader saw EndRun transition @ 985133613.326952707 (0004674e742027) rix-drp_udpencoder[70415]: <I> EbReceiver saw EndRun transition @ 985133613.326952707 (0004674e742027) rix-drp_udpencoder[70415]: <I> received key = unconfigure rix-drp_udpencoder[70415]: <I> PGPReader saw Unconfigure transition @ 985133630.918879608 (0004674f6d5f9b) rix-drp_udpencoder[70415]: <I> EbReceiver saw Unconfigure transition @ 985133630.918879608 (0004674f6d5f9b)
Recording Experiment rixdaq18 Run 27
This was the first recording of the encoder at 120Hz.
xtcreader output
$ xtcreader -d -w 1 -f /cds/data/psdm/rix/rixdaq18/xtc/rixdaq18-r0027-s000-c000.xtc2 | grep shape | head -16 'encoderValue' (shape: 1): 23563414 'timing' (shape: 1): 505870 'scale' (shape: 1): 6667 'mode' (shape: 1): 0 'error' (shape: 1): 0 'majorVersion' (shape: 1): 1 'minorVersion' (shape: 1): 0 'microVersion' (shape: 1): 0 'encoderValue' (shape: 1): 23563404 'timing' (shape: 1): 838450 'scale' (shape: 1): 6667 'mode' (shape: 1): 0 'error' (shape: 1): 0 'majorVersion' (shape: 1): 1 'minorVersion' (shape: 1): 0 'microVersion' (shape: 1): 0