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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Accessing SNL Function and global Pvs from C |
| From: | Ganesh Jangir <[email protected]> |
| To: | [email protected] |
| Date: | Mon, 24 Feb 2014 22:45:19 +0530 |
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.
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