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AdV-DAQ (Calibration)
letendre, masserot, mours, pacaud - 15:08 Tuesday 05 May 2026 (69070) Print this report
DAC1955 - v3 firmware deploiement

After the successfull deploiement for the WEB NCAL , we continue to use this new firmware on WEB and NEB PCal system and for the NEB NCal one.

Below the list of the operations performed:

  • WEB PCAL system
    • Update the DAC1955-SN11 (WEB_PCAL_DAC) located in the DBOX-SN49 with the v3r3 release for the FPGA firmware and the DSP code
    • Update the WEB_PCal_fast Acl server 
    • Update the WEB_PCAL_DAC part in the SWEB_dbox_rack DBox server and reconfigure it 
    • After these operations the WEB_PCAL loop was successfully close
    • operations performed between 2026-05-05-06h49m50-UTC and 2026-05-05-07h27m54-UTC 
  • NEB NCAL and PCAL systems update
    • Update the VPM Online configuration to use the DaqBox v17r9 for the SNEB_dbox_{bench,rack} servers
    • Update the DAC1955_SN6 (NEB_DAC_NCAL0) ) located in the DBOX-SN118 with the v3r3 release for the FPGA firmware and the DSP code
    • Update the DAC1955_SN18 (NEB_DAC_NCAL_TCS) located in the DBOX-SN119 with the v3r3 release for the FPGA firmware and the DSP code
    • Update the DAC1955_SN121 (NEB_DAC_PCAL) located in the DBOX-SN35 with the v3r3 release for the FPGA firmware and the DSP code 
    • Update the NEB_NCal server configuration
    • Update the NEB_PCal server configuration  and  the NEB_NNC_Tilt server configuration
      • these 2 servers are sharing the same DAC1955_SN121 (NEB_DAC_PCAL) but each one sends a Tolm packet  related to its used channels
    • Update the SNEB_dbox_rack configuration to set the related DAC1955 boards configuration
    • operations performed between 2026-05-05-08h28m20-UTC and 2026-05-05-09h39m12-UTC
    • After these operations only  the NEB NCAL loops were tested and all were successfully closed 
    • for the NEB_rtpc, the output data flow related to the DAC1955 boards was reduced from 29.4MB/s to 19.3MB/s 
Comments to this report:
masserot, pacaud - 22:33 Thursday 07 May 2026 (69092) Print this report

Updating the SBE server configurations for the DAC1955 V3 firmware, we fpund strange Tolm packet setting for some Acl*s servers running of the SQB1 rtpc, more precisely for

  • the SQB1_LC server where the  TOLM packets for the "SQB1_DAC_LC_LVDT_out_INT" and "SQB1_DAC_PSD" DAC1955  was not sent at the correct frequency
    • TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_LC_LVDT_out_INT"    50000    DAC1955_FREQ  with    DAC1955_FREQ (= 100000)
    • instead of TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_LC_LVDT_out_INT"    10000    DAC1955_FREQ  meaning that only 2 over the 10 packets were sent 
    • same thing for  TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_PSD" 50000     DAC1955_FREQ 

We set the correct parameters but when we restarted the SQB1_LC server, we lost all the input Tolm packets . To recover the Tolm input packets, a reboot of the SQB1_rtpc was required .

We made several trials and at the end we set

  • for the SQB1_LC server; 
    • this line for the  SQB1_DAC_LC_LVDT_out_INT Tolm packet in order to have all the DAC sample: TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_LC_LVDT_out_INT"    LC_LOOP_FREQ    DAC1955_FREQ
    • this line for  the SQB1_DAC_PSD Tolm packet as the DAC channels are only constante value : TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_PSD" 50000     DAC1955_FREQ as previously
  • for the SQB1_FI server,  as we would like to have output Tolm data flow and it s only temperature control loops
    • this line for the SQB1_DAC_01_INT Tolm packet : TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_01_INT"    50000    DAC1955_FREQ   instead of  TOLM_OUTPUT_PACKET_SLICED    "SQB1_DAC_01_INT"    LOOP_FREQ(10000)    DAC1955_FREQ previously

With these configurations,

  • all the servers are correctly running
  • the output Tolm data flow is the same as before the modifications, meaning that the use of DAC1955 v3 firmware will be helpful 
  • the SBE and LC loops were successfully closed 

Operations performed between 2026-05-07-13h45m08-UTC  and  2026-05-07-14h47m25-UTC

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