Low Voltage Vontrol Applications

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Revision as of 10:44, 21 September 2011 by Hovanes (Talk | contribs) (Wiener MPOD Hardware Configuration)

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MPOD Low Voltage Crate Control

Wiener MPOD Hardware Configuration

Fernando got a Wiener MPOD crate with a controller and one MPV.8008L card and one EHS F205p-F card. I obtained a IP address for this controller on 36 subnet:

harpo:snmp> sudo /sbin/arping halldmpod1
ARPING 129.57.36.152 from 129.57.36.96 eth0
Unicast reply from 129.57.36.152 [00:50:C2:2D:CC:01]  1.862ms
Unicast reply from 129.57.36.152 [00:50:C2:2D:CC:01]  1.850ms
Sent 2 probes (1 broadcast(s))
Received 2 response(s)

There was some problem getting it on the network. When it boots, it seems to obtain the correct address via DHCP, which is evident from the IP number shown on the front-panel display. But does not respond to pings. When I manually put static IP address through the front panel, then it responds to pings. The MPOD controller has an Ethernet interface that provides an SNMP-based service. We will use it to control the low and bias voltages on the MPOD boards.

SNMP Driver from NCSL

I got a generic EPICS SNMP driver/device support from John A. Priler (priller@nscl.msu.edu) called snmp-nscl-0.9.8. It was their version of the SNMP driver which apparently they originally obtain from DESY. They actually used this package for MPOD crate control. He also sent me an example of an EPICS database file which use the SNMP device support.

I went ahead and untared the tar-ball in /group/halld/Online/controls/epics/support/ directory. Then I had to modify the configure/RELEASE file adding the following two lines to it:

EPICS_BASE=$(EPICS)/base
EPICS_EXTENSIONS=$(EPICS)/extensions

I was able to compile the snmp-nscl-0.9.8 for 32-bit RHEL5 Linux. But compilation of 64-bit Ubuntu 10.04 failed because of some syntax error:

make[3]: Entering directory `/group/halld/Online/controls/epics/support/snmp-nscl-0.9.8/snmpApp/src/O.linux-x86_64'
perl /group/halld/Online/controls/epics/base/bin/linux-x86_64/makeIncludeDbd.pl base.dbd devSnmp.dbd ../O.Common/snmpInclude.dbd
Expanding dbd
/group/halld/Online/controls/epics/base/bin/linux-x86_64/dbExpand  -I . -I .. -I ../../../dbd -I/group/halld/Online/controls/epics/base/dbd  -o ../O.Common/snmp.dbd ../O.Common/snmpInclude.dbd
Installing created dbd file ../../../dbd/snmp.dbd
/usr/bin/g++ -c  -D_POSIX_C_SOURCE=199506L -D_POSIX_THREADS -D_XOPEN_SOURCE=500           -D_X86_64_  -DUNIX  -D_BSD_SOURCE -Dlinux  -D_REENTRANT   -O3   -Wall      -m64     -g -fPIC -I. -I../O.Common -I. -I.. -I../../../include/os/Linux -I../../../include -I/group/halld/Online/controls/epics/base/include/os/Linux -I/group/halld/Online/controls/epics/base/include  -I/group/halld/Online/controls/epics/extensions/include        ../devSnmp.cpp 
../devSnmp.cpp: In constructor ‘devSnmp_device::devSnmp_device(devSnmp_manager*, devSnmp_group*, dbCommon*, link*, char*, bool*)’:
../devSnmp.cpp:2659: error: cannot convert ‘unsigned int*’ to ‘size_t*’ for argument ‘3’ to ‘int get_node(const char*, oid*, size_t*)’
../devSnmp.cpp:2660: error: cannot convert ‘unsigned int*’ to ‘size_t*’ for argument ‘3’ to ‘int read_objid(const char*, oid*, size_t*)’
make[3]: *** [devSnmp.o] Error 1
make[3]: Leaving directory `/group/halld/Online/controls/epics/support/snmp-nscl-0.9.8/snmpApp/src/O.linux-x86_64'
make[2]: *** [install.linux-x86_64] Error 2
make[2]: Leaving directory `/group/halld/Online/controls/epics/support/snmp-nscl-0.9.8/snmpApp/src'
make[1]: *** [src.install] Error 2
make[1]: Leaving directory `/group/halld/Online/controls/epics/support/snmp-nscl-0.9.8/snmpApp'
make: *** [snmpApp.install] Error 2