Experimental Physics and
Industrial Control System

Facing problem in calling/accessing SNL Function and global Pvs from C.

Here is the example I tried.

_________________________________________________________________

program cmcseq

string CMC_STATUS;

assign CMC_STATUS to "CMC_STATUS";

foreign ssId;

// No monitoring

// No options

....

ss ss1 {

state initial{

when(delay(5)){

printf("Calling cmcStatus... \n");

cmcStatus(ssId,"Hello",pvIndex(CMC_STATUS));

printf("Received status is %s\n", CMC_STATUS);

}state default

}

....

}

C Function is

%%#include <stdio.h>

%%#include <string.h>

%%#include <stdlib.h>

%{

void cmcStatus(SS_ID ssId,string msg, VAR_ID pvCmcStatus) {

strcpy(pvCmcStatus,msg);

seq_pvPut(ssId,pvCmcStatus, ASYNC);

}

}%

During Make Warnings are

;

^

../cmcseq.stt:49:4: warning: implicit declaration of function ‘cmcStatus’ [-Wimplicit-function-declaration]

cmcStatus("ss1","Hello",CMC_STATUS);

^

.

.

.

../cmcseq.stt:149:6: warning: conflicting types for ‘cmcStatus’ [enabled by default]

void cmcStatus(SS_ID ssId,string msg, VAR_ID pvCmcStatus) {

^

../cmcseq.stt:49:4: note: previous implicit declaration of ‘cmcStatus’ was here

cmcStatus("ss1","Hello",CMC_STATUS);

^

../cmcseq.stt: In function ‘cmcStatus’:

../cmcseq.stt:151:3: warning: passing argument 1 of ‘strcpy’ makes pointer from integer without a cast [enabled by default]

strcpy(pvCmcStatus,msg);

^ printf("checking if all are connected USE pvConnecetd Count Function, Wait UNTIL lISTED PVS are c printf("checking if all are connected USE pvConnecetd Count Function, Wait UNTIL lISTED PVS are connected \n");

/* configure(&seq,&version);

printf("Read Configuration parameter here, Calling File Read function %d %f \n", seq, version);

*/onnected \n");

/* configure(&seq,&version);

printf("Read Configuration parameter here, Calling File Read function %d %f \n", seq, version);

*/

In file included from cmcseq.c:4:0:

/usr/include/string.h:125:14: note: expected ‘char * __restrict__’ but argument is of type ‘VAR_ID’

extern char *strcpy (char *__restrict __dest, const char *__restrict __src)

^

/usr/bin/ar -rc libCMC_SEQSupport.a initTrace.o cmcseq.o

/usr/bin/ranlib libCMC_SEQSupport.a

The error during run time is .

seq cmcseq,

Sequencer release 2.1.16, compiled Sat Feb 22 20:11:22 2014

Spawning sequencer program "cmcseq", thread 0xd939e0: "cmcseq"

cmcseq[0]: all channels connected & received 1st monitor

epics> Calling cmcStatus...

Segmentation fault (core dumped)

Also, Where can I found sequencer Examples /tutorial, for accessing SNL_Function and Pvs in C. I am referring to Sequencer User Guide 2.1.16,already.