9c1340d7d5
B0 -> BF shall always follow the corresponding bit in VAL. Remove special handling for OMSL.
697 lines
19 KiB
Plaintext
697 lines
19 KiB
Plaintext
#*************************************************************************
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# Copyright (c) 2002 The University of Chicago, as Operator of Argonne
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# National Laboratory.
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# Copyright (c) 2002 The Regents of the University of California, as
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# Operator of Los Alamos National Laboratory.
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# EPICS BASE is distributed subject to a Software License Agreement found
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# in file LICENSE that is included with this distribution.
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#*************************************************************************
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=title Multi-Bit Binary Output Direct Record (mbboDirect)
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The mbboDirect record performs the opposite function to that of the mbbiDirect
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record. It accumulates bits (in the fields B0 - BF) as unsigned characters, and
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converts them to a word which is then written out to hardware. If a bit field is
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non-zero, it is interpreted as a binary 1. On the other hand, if it is zero, it
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is interpreted as a binary 0.
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=recordtype mbboDirect
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=cut
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recordtype(mbboDirect) {
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=head2 Parameter Fields
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The record-specific fields are described below, grouped by functionality.
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=head3 Scan Parameters
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The mbboDirect record has the standard fields for specifying under what
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circumstances it will be processed.
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These fields are listed in L<Scan Fields|dbCommonRecord/Scan Fields>.
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=head3 Desired Output Parameters
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The mbboDirect record, like all output records, must specify where its output
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originates. The output mode select field (OMSL) determines whether the output
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originates from another record or from database access. When set to C<<<
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closed_loop >>>, the desired output is retrieved from the link specified in the
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desired output (DOL) field--which can specify either a database or channel
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access link--and placed into the VAL field. When set to C<<< supervisory >>>,
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the DOL field is ignored and the current value of VAL is used. The desired
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output can be written into the VAL field via dpPuts at run-time when the record
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is in C<<< supervisory >>> mode. DOL can also be a constant, in which case VAL
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is initialized to the constant value. Note that OMSL cannot be C<<< closed_loop
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>>> when DOL is a constant.
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VAL is then converted to RVAL in the routine described in the next section.
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However, the C<<< Soft Channel >>> device support module for the mbboDirect
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record writes the VAL field's value without any conversion.
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=fields OMSL, DOL, VAL
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=head3 Convert and Write Parameters
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For records that are to write values to hardware devices, the OUT output link
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must contain the address of the I/O card, and the DTYP field must specify
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the proper device support module. Be aware that the address format differs
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according to the I/O bus used. See L<Address Specification> for information
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on the format of hardware addresses.
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If the mbboDirect record does not use the C<<< Soft Channel >>> device support
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module, then VAL is converted to RVAL, and RVAL is the actual 16-bit word sent
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out. RVAL is set equal to VAL and then shifted left by the number of bits
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specified in the SHFT field (the SHFT value is set by device support and is not
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configurable by the user). RVAL is then sent out to the location specified in
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the OUT field.
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For mbboDirect records that specify a database link, a channel access link, or a
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constant, the DTYP field must specify either one of two soft device support
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routines--{Soft Channel} or C<<< Raw Soft Channel >>>. The difference between
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the two is that C<<< Soft Channel >>> writes the desired output value from VAL
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directly to the output link while C<<< Raw Soft Channel >>> writes the value
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from RVAL to the output link after it has undergone the conversion described
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above.
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=fields OUT, RVAL, SHFT, B0, B1, B2, B3, B4, B5, B6, B7, B8, B9, BA, BB, BC, BD, BE, BF
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=head3 Operator Display Parameters
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See L<Fields Common to All Record Types|dbCommonRecord/Operator Display
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Parameters> for more on the record name (NAME) and description (DESC) fields.
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=fields NAME, DESC
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=cut
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include "dbCommon.dbd"
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%/* Declare Device Support Entry Table */
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%struct mbboDirectRecord;
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%typedef struct mbbodirectdset {
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% dset common; /*init_record returns: (0, 2)=>(success, success no convert)*/
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% long (*write_mbbo)(struct mbboDirectRecord *prec); /*returns: (0, 2)=>(success, success no convert)*/
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%} mbbodirectdset;
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%#define HAS_mbbodirectdset
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%
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field(VAL,DBF_LONG) {
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prompt("Word")
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promptgroup("50 - Output")
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asl(ASL0)
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pp(TRUE)
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}
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field(OMSL,DBF_MENU) {
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prompt("Output Mode Select")
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promptgroup("50 - Output")
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pp(TRUE)
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interest(1)
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menu(menuOmsl)
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}
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field(NOBT,DBF_SHORT) {
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prompt("Number of Bits")
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promptgroup("50 - Output")
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special(SPC_NOMOD)
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interest(1)
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}
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field(DOL,DBF_INLINK) {
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prompt("Desired Output Loc")
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promptgroup("40 - Input")
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interest(1)
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}
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field(OUT,DBF_OUTLINK) {
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prompt("Output Specification")
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promptgroup("50 - Output")
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interest(1)
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}
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field(RVAL,DBF_ULONG) {
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prompt("Raw Value")
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special(SPC_NOMOD)
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pp(TRUE)
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}
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field(ORAW,DBF_ULONG) {
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prompt("Prev Raw Value")
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special(SPC_NOMOD)
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interest(3)
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}
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field(RBV,DBF_ULONG) {
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prompt("Readback Value")
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special(SPC_NOMOD)
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}
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field(ORBV,DBF_ULONG) {
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prompt("Prev Readback Value")
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special(SPC_NOMOD)
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interest(3)
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}
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field(MASK,DBF_ULONG) {
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prompt("Hardware Mask")
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special(SPC_NOMOD)
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interest(1)
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}
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field(MLST,DBF_LONG) {
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prompt("Last Value Monitored")
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special(SPC_NOMOD)
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interest(3)
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}
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field(OBIT,DBF_LONG) {
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prompt("Last Bit mask Monitored")
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special(SPC_NOMOD)
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interest(3)
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}
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field(SHFT,DBF_USHORT) {
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prompt("Shift")
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promptgroup("50 - Output")
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interest(1)
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}
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=head3 Run-time Parameters
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These parameters are used by the run-time code for processing the mbbo Direct
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record.
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MASK is used by device support routine to read the hardware register. Record
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support sets low order NOBT bits. Device support can shift this value.
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MLST holds the value when the last monitor for value change was triggered.
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OBIT has similar role wrt. the B* fields.
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=fields NOBT, ORAW, MASK, MLST
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=head3 Simulation Mode Parameters
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The following fields are used to operate the record in simulation mode.
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If SIMM (fetched through SIML) is YES, the record is put in SIMS
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severity and the value is written through SIOL, without conversion.
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SSCN sets a different SCAN mechanism to use in simulation mode.
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SDLY sets a delay (in sec) that is used for asynchronous simulation
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processing.
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See L<Output Simulation Fields|dbCommonOutput/Output Simulation Fields>
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for more information on simulation mode and its fields.
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=fields SIML, SIMM, SIOL, SIMS, SDLY, SSCN
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=cut
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field(SIOL,DBF_OUTLINK) {
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prompt("Simulation Output Link")
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promptgroup("90 - Simulate")
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interest(1)
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}
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field(SIML,DBF_INLINK) {
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prompt("Simulation Mode Link")
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promptgroup("90 - Simulate")
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interest(1)
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}
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field(SIMM,DBF_MENU) {
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prompt("Simulation Mode")
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special(SPC_MOD)
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interest(1)
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menu(menuYesNo)
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}
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field(SIMS,DBF_MENU) {
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prompt("Simulation Mode Severity")
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promptgroup("90 - Simulate")
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interest(2)
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menu(menuAlarmSevr)
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}
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field(OLDSIMM,DBF_MENU) {
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prompt("Prev. Simulation Mode")
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special(SPC_NOMOD)
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interest(4)
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menu(menuSimm)
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}
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field(SSCN,DBF_MENU) {
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prompt("Sim. Mode Scan")
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promptgroup("90 - Simulate")
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interest(1)
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menu(menuScan)
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initial("65535")
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}
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field(SDLY,DBF_DOUBLE) {
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prompt("Sim. Mode Async Delay")
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promptgroup("90 - Simulate")
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interest(2)
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initial("-1.0")
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}
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%#include "callback.h"
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field(SIMPVT,DBF_NOACCESS) {
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prompt("Sim. Mode Private")
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special(SPC_NOMOD)
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interest(4)
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extra("epicsCallback *simpvt")
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}
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=head3 Alarm Parameters
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The possible alarm conditions for mbboDirect records are the SCAN, READ, and
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INVALID alarms.
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The IVOA field specifies an action to take when an INVALID alarm is triggered.
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There are three possible actions: C<<< Continue normally >>>, C<<< Don't drive
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outputs >>>, or C<<< Set output to IVOV >>>. When C<<< Set output to IVOV >>> is
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specified and a INVALID alarm is triggered, the record will write the value in
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the IVOV field to the output.
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See L<Invalid Output Action Fields|dbCommonOutput/Invalid Output Action Fields>
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for more information about IVOA and IVOV.
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See L<Alarm Specification|https://docs.epics-controls.org/en/latest/guides/EPICS_Process_Database_Concepts.html#alarm-specification>
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for a complete explanation of record alarms and of the standard fields.
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L<Alarm Fields|dbCommonRecord/Alarm Fields> lists other fields related
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to alarms that are common to all record types.
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=fields IVOA, IVOV
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=cut
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field(IVOA,DBF_MENU) {
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prompt("INVALID outpt action")
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promptgroup("50 - Output")
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interest(2)
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menu(menuIvoa)
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}
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field(IVOV,DBF_LONG) {
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prompt("INVALID output value")
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promptgroup("50 - Output")
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interest(2)
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}
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field(B0,DBF_UCHAR) {
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prompt("Bit 0")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1,DBF_UCHAR) {
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prompt("Bit 1")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B2,DBF_UCHAR) {
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prompt("Bit 2")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B3,DBF_UCHAR) {
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prompt("Bit 3")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B4,DBF_UCHAR) {
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prompt("Bit 4")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B5,DBF_UCHAR) {
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prompt("Bit 5")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B6,DBF_UCHAR) {
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prompt("Bit 6")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B7,DBF_UCHAR) {
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prompt("Bit 7")
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promptgroup("51 - Output 0-7")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B8,DBF_UCHAR) {
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prompt("Bit 8")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B9,DBF_UCHAR) {
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prompt("Bit 9")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BA,DBF_UCHAR) {
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prompt("Bit 10")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BB,DBF_UCHAR) {
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prompt("Bit 11")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BC,DBF_UCHAR) {
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prompt("Bit 12")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BD,DBF_UCHAR) {
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prompt("Bit 13")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BE,DBF_UCHAR) {
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prompt("Bit 14")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(BF,DBF_UCHAR) {
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prompt("Bit 15")
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promptgroup("52 - Output 8-15")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B10,DBF_UCHAR) {
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prompt("Bit 16")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B11,DBF_UCHAR) {
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prompt("Bit 17")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B12,DBF_UCHAR) {
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prompt("Bit 18")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B13,DBF_UCHAR) {
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prompt("Bit 19")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B14,DBF_UCHAR) {
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prompt("Bit 20")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B15,DBF_UCHAR) {
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prompt("Bit 21")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B16,DBF_UCHAR) {
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prompt("Bit 22")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B17,DBF_UCHAR) {
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prompt("Bit 23")
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promptgroup("53 - Output 16-23")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B18,DBF_UCHAR) {
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prompt("Bit 24")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B19,DBF_UCHAR) {
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prompt("Bit 25")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1A,DBF_UCHAR) {
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prompt("Bit 26")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1B,DBF_UCHAR) {
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prompt("Bit 27")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1C,DBF_UCHAR) {
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prompt("Bit 28")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1D,DBF_UCHAR) {
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prompt("Bit 29")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1E,DBF_UCHAR) {
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prompt("Bit 30")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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field(B1F,DBF_UCHAR) {
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prompt("Bit 31")
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promptgroup("54 - Output 24-31")
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special(SPC_MOD)
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pp(TRUE)
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interest(1)
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}
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=head2 Record Support
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=head3 Record Support Routines
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=head4 init_record
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This routine initializes SIMM if SIML is a constant or creates a channel access
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link if SIML is PV_LINK. If SIOL is PV_LINK a channel access link is created.
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This routine next checks to see that device support is available.The routine
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next checks to see if the device support write routine is defined. If either
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device support or the device support write routine does not exist, an error
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message is issued and processing is terminated.
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If DOL is a constant, then VAL is initialized to its value and UDF is set to
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FALSE.
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MASK is cleared and then the NOBT low order bits are set.
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If device support includes C<init_record()>, it is called.
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If device support returns success, VAL is then set from RVAL and UDF is set to
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FALSE.
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=head4 Process
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See next section.
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=head3 Record Processing
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Routine process implements the following algorithm:
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=over
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=item 1.
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Check to see that the appropriate device support module exists. If it doesn't,
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an error message is issued and processing is terminated with the PACT field
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still set to TRUE. This ensures that processes will no longer be called for this
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record. Thus error storms will not occur.
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|
|
|
=item 2.
|
|
|
|
If PACT is FALSE
|
|
|
|
=over
|
|
|
|
=item * If DOL is DB_LINK and OMSL is CLOSED_LOOP
|
|
|
|
=over
|
|
|
|
=item * Get value from DOL
|
|
|
|
=item * Set PACT to FALSE
|
|
|
|
=back
|
|
|
|
=back
|
|
|
|
=item 3.
|
|
|
|
Convert
|
|
|
|
=over
|
|
|
|
=item * If PACT is FALSE, compute RVAL
|
|
|
|
=over
|
|
|
|
=item * Set RVAL = VAL
|
|
|
|
=item * Shift RVAL left SHFT bits
|
|
|
|
=back
|
|
|
|
=item * Status=write_mbboDirect
|
|
|
|
=back
|
|
|
|
=item 4.
|
|
|
|
If PACT has been changed to TRUE, the device support write output routine has
|
|
started but has not completed writing the new value. In this case, the
|
|
processing routine merely returns, leaving PACT TRUE.
|
|
|
|
=item 5.
|
|
|
|
Check to see if monitors should be invoked.
|
|
|
|
=over
|
|
|
|
=item * Alarm monitors are invoked if the alarm status or severity has changed.
|
|
|
|
=item * Archive and value change monitors are invoked if MLST is not equal to VAL.
|
|
|
|
=item * Monitors for RVAL and RBV are checked whenever other monitors are invoked.
|
|
|
|
=item * NSEV and NSTA are reset to 0.
|
|
|
|
=back
|
|
|
|
=item 6.
|
|
|
|
Scan forward link if necessary, set PACT FALSE, and return.
|
|
|
|
=back
|
|
|
|
=begin html
|
|
|
|
<br><hr><br>
|
|
|
|
=end html
|
|
|
|
=head2 Device Support
|
|
|
|
=head3 Fields Of Interest To Device Support
|
|
|
|
Each mbboDirect record must have an associated set of device support routines.
|
|
The primary responsibility of the device support routines is to obtain a new raw
|
|
mbbo value whenever write_mbboDirect is called. The device support routines are
|
|
primarily interested in the following fields:
|
|
|
|
=fields PACT, DPVT, UDF, NSEV, NSTA, NOBT, OUT, RVAL, RBV, MASK, SHFT
|
|
|
|
=head3 Device Support Routines
|
|
|
|
Device support consists of the following routines:
|
|
|
|
=head4 long report(int level)
|
|
|
|
This optional routine is called by the IOC command C<dbior> and is passed the
|
|
report level that was requested by the user.
|
|
It should print a report on the state of the device support to stdout.
|
|
The C<level> parameter may be used to output increasingly more detailed
|
|
information at higher levels, or to select different types of information with
|
|
different levels.
|
|
Level zero should print no more than a small summary.
|
|
|
|
=head4 long init(int after)
|
|
|
|
This optional routine is called twice at IOC initialization time.
|
|
The first call happens before any of the C<init_record()> calls are made, with
|
|
the integer parameter C<after> set to 0.
|
|
The second call happens after all of the C<init_record()> calls have been made,
|
|
with C<after> set to 1.
|
|
|
|
=head4 init_record
|
|
|
|
init_record(precord)
|
|
|
|
This routine is optional. If provided, it is called by the record support
|
|
C<init_record()> routine. If MASK is used, it should be shifted if necessary and
|
|
SHFT given a value.
|
|
|
|
=head4 get_ioint_info
|
|
|
|
get_ioint_info(int cmd,struct dbCommon *precord,IOSCANPVT *ppvt)
|
|
|
|
This routine is called by the ioEventScan system each time the record is added
|
|
or deleted from an I/O event scan list. C<cmd> has the value (0,1) if the
|
|
record is being (added to, deleted from) an I/O event list. It must be
|
|
provided for any device type that can use the ioEvent scanner.
|
|
|
|
=head4 write_mbboDirect
|
|
|
|
write_mbboDirect(precord)
|
|
|
|
This routine must output a new value. It returns the following values:
|
|
|
|
=over
|
|
|
|
=item * 0: Success.
|
|
|
|
=item * Other: Error.
|
|
|
|
=back
|
|
|
|
=head3 Device Support For Soft Records
|
|
|
|
This C<<< SOft Channel >>> module writes the current value of VAL.
|
|
|
|
If the OUT link type is PV_LINK, then dbCaAddInlink is called by
|
|
C<init_record()>.
|
|
|
|
write_mbboDirect calls recGblPutLinkValue to write the current value of VAL.
|
|
|
|
See L<Soft Output|Soft_Output>.
|
|
|
|
=cut
|
|
|
|
}
|