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  • How to use the epics device support of fmc tdc

How to use the epics device support of fmc tdc

Last edited by Erik van der Bij Jun 23, 2022
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Here we introduce how to use the SPEC and FMC-TDC with the EPICS device support.


  1. Edit configure/RELEASE
    # the CONFIG_SITE file.
    # Variables and paths to dependent modules:
    MODULES=/opt/epics/R3-15-8/modules
    DEVWRTDC=$(MODULES)/devWrtdc
    <- add

  1. Edit Makefile
    $ vi xxxApp/src/Makefile
    Add PROD_DEPLIB_DIRS and PROD_LIBS
    #----------------------------------------
    # ADD RULES AFTER THIS LINE
    PROD_DEPLIB_DIRS += /home/kekbcont/wr/fmc-tdc-sw/lib
    <- Add with your condition
    PROD_LIBS += fmctdc <- Add

  1. Check the PCI ID
    $ lspci | grep CERN
    01:00.0 Non-VGA unclassified device: CERN/ECP/EDU Device 018d (rev 03)

    In this case, ID becomes 0100.

  1. Create EPICS DB file
    There are two types of the record.
    The PCI ID is put on the INP field with channel number.
    record(longin, "ET_WR8:TDC:CH0:LI") {
    field(DTYP, "WR TDC STAMP")
    field(SCAN, "I/O Intr")
    field(INP, "@IF=0100,CH=0")
    field(TSE, "-2")
    }
    record(waveform, "ET_WR8:TDC:CH0:WF") {
    field(DTYP, "WR TDC STAMP")
    field(SCAN, "I/O Intr")
    field(INP, "@IF=0100,CH=0")
    field(NELM, "3")
    field(FTVL, "ULONG")
    field(TSE, "-2")
    field(MPST, "Always")
    }

  1. Build IOC with the make command at the TOP directory.

  1. Edit the start-up script
    $ vi iocBoot/iocxxx/st.cmd
    Add wrtdcOpen() before dbLoadRecords()
    dbLoadDatabase "dbd/testWrtdc.dbd"
    testWrtdc_registerRecordDeviceDriver pdbbase
    wrtdcOpen(0100)
    <- add

  1. Execute
    $ cd iocBoot/iocxxx
    $ sudo -E ./st.cmd

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