seq pvPut to a waveform

[Dayle Kotturi <dayle@slac.stanford.edu>]

Hello,

I'd be grateful for code snippets showing how to put a waveform of values
to a PV. I am able to successfully pvPut other data types, but just not
waveforms. I've tried to match the sytax of caput -a where the first arg
is NELM (or NORD) and then the array is appended after that.  I've also
tried just puttting the array of NELM values. Neither worked.  No error
messages on the console with +d option set. Recompiling seq-R2-0-11
with DEBUG defined caused a segmentation fault. I didn't investigate
the reason for that.

Versions: epics3.14.8.2 and seq-R2-0-11
Platform: linux-x86

Details: I have a waveform of 21 shorts that I want to put to a PV of
FTVL USHORT with NELM 21.

[cdlx08] /afs/slac/g/lcls/tools/script>caget KLYS:LI20:95:RULE0
KLYS:LI20:95:RULE0 21 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

On the (soft) ioc:
epics> dbpr("KLYS:LI20:95:RULE0",4)
ACKS: NO_ALARM      ACKT: YES           ASG:                ASP: 0x00000000
BKPT: 0x00          BPTR: 0x483eef09    BUSY: 0             DESC: Rule
DISA: 0             DISP: 0             DISS: NO_ALARM      DISV: 1
DPVT: 0x00000000    DSET: 0xfc578000    DTYP: Soft Channel  EGU: tick
EVNT: 0             FLNK:CONSTANT 0     FTVL: USHORT        HOPR: 0
INP:CONSTANT        LCNT: 0             LOPR: 0             LSET: 0xc06cf309
MLIS: 0x98adf80988a9f80902000000        MLOK: 0x303eef09
NAME: KLYS:LI20:95:RULE0                NELM: 21            NORD: 21
NSEV: NO_ALARM      NSTA: NO_ALARM      PACT: 0             PHAS: 0
PINI: YES           PPN: 0x00000000     PPNR: 0x00000000    PREC: 0
PRIO: LOW           PROC: 0             PUTF: 0             RARM: 0
RDES: 0x20a6e009    RPRO: 0             RSET: 0x203ed800    SCAN: Passive
SDIS:CONSTANT       SEVR: NO_ALARM      SIML:CONSTANT       SIMM: NO
SIMS: NO_ALARM      SIOL:CONSTANT       SPVT: 0x00000000    STAT: NO_ALARM
TIME: 0x0cd6072760513f19                TPRO: 0             TSE: 0
TSEL:CONSTANT       UDF: 0              VAL: 0x00000000

at top before start of state set:
option -a; /* sync op. wait for pvGet/pvPut to complete */
option -c; /* no wait for db connections */
option +d; /* Turn on runtime debug messages */
option +w; /* Display SNC warnings */

#define PDU_RULE_PUT_WF_SIZE 22 /* includes 1 for the NELM */

/* Tempory variable re-used to hold the trigger rule copied from an
   updated global rule and assigned to an RTEMS IOC trigger rule that uses it */
short myTriggerRule[PDU_RULE_PUT_WF_SIZE]; 
assign myTriggerRule to ""; /* MUST do this to get this var into DB Block
                               per Kuhkee Kim 2010/09/30 */

/* Inside a state */
            pvAssign(myTriggerRule,"KLYS:LI20:95:RULE0");
            pvMonitor(myTriggerRule);

            /* Update the definition of the trigger rule to match the
               global rule it is assigned to */
            pvPut(myTriggerRule);
            pvFlush();
            printf("sncpdu: contents of SNL var now put into EPICS PV\n");

            sprintf(pvNORD, "%s.NORD",triggerRuleStrings[nn]);
            pvAssign(myTriggerRuleNORD,pvNORD);
            myTriggerRuleNORD = 21;
            pvPut(myTriggerRuleNORD);
            pvFlush();
            printf("sncpdu: NORD of WF var now put into EPICS PV\n");

            printf("sncpdu: running %s changed to ", myTriggerName);
            for (kk=0; kk<PDU_RULE_PUT_WF_SIZE; kk++) {
              printf("%hu ", myTriggerRule[kk]);
            }
            printf("\n");

Console output:
sncpdu: contents of SNL var now put into EPICS PV
sncpdu: NORD of WF var now put into EPICS PV
sncpdu: running KLYS:LI20:95:RULE0 changed to 21 0 0 16 0 0 0 0 0 0 64 0 0 0 0 0 0 0 0 0 0 0

I read about calling pvFlush in an earlier tech-talk thread. 
Adding it didn't help.

Setting NORD explicitly (like is needed in device support for waveform
record) also did not help. The waveform PV remains unchanged as:
[cdlx08] /afs/slac/g/lcls/tools/script>caget KLYS:LI20:95:RULE0
KLYS:LI20:95:RULE0 21 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

thanks for any help,
Dayle Kotturi                                       dayle@slac.stanford.edu
Controls Department 					office 650-926-4923
SLAC National Accelerator Laboratory                       fax 650-926-3800