Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 22 Aug 2007 15:02:41 -0500

Hi Peter,
Peter Zumbruch wrote:

 - The file "$EPICS-BASE/src/libCom/osi/default/osdWireFormat.h"

has been extended by those two lines to comply for the
little-endianness :
    #elif defined (_cris_)
    #     define EPICS_LITTLE_ENDIAN

Are you sure that this architecture is little-endian? It looks to me
from your results below like you should try using EPICS_BIG_ENDIAN.
Here's why:
name:   zumbruchHost:aiExample2
DBR_STRING      3
DBR_SHORT       768
DBR_LONG        50331648
and what it should look like:
name:   zumbruch2Host:aiExample2
DBR_STRING      3
DBR_SHORT       3
DBR_LONG        3

If I convert the short result 768 to hex, the result is 0x0300 instead
of 0x0003, i.e. the high and low bytes of the 16 bit result have been
swapped from what they should contain. Similarly converting the long
result to hex gives 0x03000000 which implies the wrong endianness.
Try making that change in osdWireFormat.h and recompiling and I suspect
this problem will disappear.
Once this is resolved I'll be happy to add this new architecture to the
next official release.
- Andrew
--
When a distinguished but elderly scientist states that something is
possible, he is almost certainly right.  When he states that something
is impossible, he is very probably wrong.  -- Arthur C. Clarke

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System