Difference between revisions of "JLab discriminator"
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== Scalers readout preliminary driver == | == Scalers readout preliminary driver == | ||
| − | The current scheme of data flow is the | + | The current scheme of data flow is the following (from top to down): |
{| style="color:green; background-color:#ffffcc;" cellpadding="10" cellspacing="0" border="1px" | {| style="color:green; background-color:#ffffcc;" cellpadding="10" cellspacing="0" border="1px" | ||
| − | | style="border-style: solid; border-width: 1px 1px | + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | VME bus |
| − | + | ||
| − | + | ||
|- | |- | ||
| − | | style="border-style: solid; border-width: 1px 1px | + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | dsc2.c <br/ > mutex-ed access to the hardware |
| − | + | |- | |
| + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | JLabDiscr.c::JLabDiscrReadTask() <br/ > a thread to poll scalers every second | ||
| + | |- | ||
| + | |} | ||
| + | {| style="color:blue; background-color:#ffffcc;" cellpadding="10" cellspacing="0" border="1px" | ||
| + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | EPICS Scan Task <br/ > will periodically start a record processing | ||
| + | |- | ||
| + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | JLabDiscr_subrecord.c <br/ > will copy from memory and push to CA server | ||
| + | |- | ||
| + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | EPICS CA Server will broardcast | ||
|} | |} | ||
Revision as of 17:35, 5 December 2011
There is a Hall-B page for JLab discriminator
Manuals
Manual for 16-Channel Discriminator/Scaler VME Module (by J.Proffit), 20-Nov-2002, in
(pdf)
Manual for New 16-Channel Discriminator/Scaler VME Module (draft by Ben Raydo), 6-Mar-2009, in
(pdf)
Manual for New 16-Channel Discriminator/Scaler VME Module (rev.B by Ben Raydo), 28-May-2010, in
(pdf)
Manual for New 16-Channel Discriminator/Scaler VME Module (rev.C by Ben Raydo), 11-Feb-2011, in
(pdf)
Example Program
#include "dsc2.h"
int main(){
vmeOpenDefaultWindows(); /* Map the VME bus memory (For Linux only.). */
dsc2Init(0xe00000,0,1); /* Base memory: Only last 2 HW switches are relevant,
the rest are lost due to shift of address. */
/* Memory size per board. */
/* Number of boards. */
dsc2Status(0,0); /* Board number and flag which is not used. */
dsc2PrintScalers(0,0xff);/* Board number and printing option */
return(0);
}
Linux VME support
Brian Moffit from CODA group has setup a directory for software for Intel based VME controllers running Linux. README there is a good introduction to the subject.
/site/coda/2.6.1/extensions/linuxvme
RPMs for VME controllers running Linux located in the directory
/site/coda/2.6.1/extensions/linuxvme/RPMS
Available files are:
gefvme-kmod-common-4.1-0.i386.rpm (Development files) kmod-gefvme-PAE*.rpm (Kernel module)
To install the development RPM without kernel module will require the --nodeps option
rpm -i --nodeps gefvme-kmod-common-4.1-0.i386.rpm
Scalers readout preliminary driver
The current scheme of data flow is the following (from top to down):
| VME bus |
| dsc2.c mutex-ed access to the hardware |
| JLabDiscr.c::JLabDiscrReadTask() a thread to poll scalers every second |
| EPICS Scan Task will periodically start a record processing |
| JLabDiscr_subrecord.c will copy from memory and push to CA server |
| EPICS CA Server will broardcast |
