Experimental Physics and
Industrial Control System

Benjamin Sailer <[email protected]> · Thu, 06 Jul 2000 14:41:13 +0200

Hello out there,

I hope this is not a to trivial Problem to commit to this mailing list,
but I am trying to make a caServer for LynxOS to control VME Cards
sharing the Crate with a PowerPC CPU under LynxOS. This works pretty
fine when I am using nearly all the options for Linux (LynxOS also uses
the gcc compiler).

But now I am trying to implement some CA queries into the server to get
some parameters from another server. Therefore I used the little example
'myClient' (as I used 'myServer' for the Server tasks), and this
compiles pretty fine but gets no connection to the Parameter Server
while the same code compiled with Linux does exactly what I expected it
to do.

The error messages are

CA.Client.Diagnostic..............................................
    Message: "The search request/beacon address list was empty after
initialization"
    Severity: Warning
    Source File: ../iocinf.c Line Number: 772
..................................................................
bin/LynxOS/daq_seb_cas<warning>: Cannot switch to asyncronous mode:
Error number not set
bin/LynxOS/daq_seb_cas<    err>: Do not receive value of
HAD:PARAM:HERAKLES:CRATE_ID: Error number not set

pretty similar to the ones ca_test supplied:

CA.Client.Diagnostic..............................................
    Message: "The search request/beacon address list was empty after
initialization"
    Severity: Warning
    Source File: ../iocinf.c Line Number: 772
..................................................................
Not Found HAD:PARAM:HERAKLES:CRATE_ID

I made some minor changes to the sources in the base/src/ca tree because
LynxOS needs another way to find out it's own IP-address. Here's an
extract of the function I supplied:

> #ifdef LynxOS
> 
> #include <stdio.h>
> #include <string.h>
> 
> #include <sys/utsname.h>
> #include <netdb.h>
> 
> char *getIfAddr(char *ip) {
>       struct utsname nameS, *name = &nameS;
>       struct hostent entryS, *entry = &entryS;
>       unsigned char first, second, third, fourth;
> 
>       uname(name);
>       entry = gethostbyname(name->nodename);
>       first = *(entry->h_addr);
>       second = *((entry->h_addr) + 1);
>       third = *((entry->h_addr) + 2);
>       fourth = *((entry->h_addr) + 3);
>       sprintf(ip,"%d.%d.%d.%d", first, second, third, fourth);
>       return ip;
> }
> 
> #endif
62a86
>       char                            myownifaddr[16];
94c118,123
< #ifndef LynxOS
---
> #ifdef LynxOS
>       getIfAddr(myownifaddr);
>       init = TRUE;
>       addr.sin_family = AF_INET;
>       addr.sin_addr.s_addr = inet_addr(myownifaddr);
> #else
144,148d172
< #endif

I am using Version R3.13.2 of the EPICS base package.

Is anybody out there who has experience with the CA client lib under
LynxOS.

Thank You for any comments

Benjamin 

-- 
*****************************************************************
Benjamin Sailer
eMail: [email protected]
*****************************************************************
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System