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 following (from top to down): | + | === The current scheme of data flow is the following (from top to down): === |
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| 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" | 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 | + | | style="border-style: solid; border-width: 1px 1px 1px 1px" | JLabDiscr.c::JLabDiscrReadTask() <br/ > a separate thread to poll scalers every <br/ > second and stores them in the memory |
|- | |- | ||
|} | |} | ||
| − | |||
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|} | |} | ||
| − | Other supplemental files are: | + | === Other supplemental files are: === |
* JLabDiscr_subMain.cpp -- The standard main program | * JLabDiscr_subMain.cpp -- The standard main program | ||
* JLabDiscr_subConfig.c -- hooks for EPICS | * JLabDiscr_subConfig.c -- hooks for EPICS | ||
* JLabDiscr_subConfig.dbd, JLabDiscr_subrecord.dbd -- DBD files | * JLabDiscr_subConfig.dbd, JLabDiscr_subrecord.dbd -- DBD files | ||
* dbJLabDiscr.db -- DB file | * dbJLabDiscr.db -- DB file | ||
| + | |||
| + | === The output === | ||
| + | |||
| + | The output is accessible via PV hallddisc1:JLabDiscr. It has a type of aSubRecord. | ||
| + | Its INPA field setups the card number (Will be configured once during IOC initilaztion). | ||
| + | The VALA is an array of 16 contains scalers of gated triggers. | ||
| + | The VALB is an array of 16 contains scalers of gated TDC values. | ||
| + | The VALC is an array of 16 contains scalers of ungated triggers. | ||
| + | The VALD is an array of 16 contains scalers of ungated TDC values. | ||
| + | The VALE is a signle scalers of gated reference clock. | ||
| + | The VALF is a signle scalers of ungated reference clock. | ||
Revision as of 15:41, 6 December 2011
There is a Hall-B page for JLab discriminator
Contents
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 separate thread to poll scalers every second and stores them in the memory |
| 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 |
Other supplemental files are:
- JLabDiscr_subMain.cpp -- The standard main program
- JLabDiscr_subConfig.c -- hooks for EPICS
- JLabDiscr_subConfig.dbd, JLabDiscr_subrecord.dbd -- DBD files
- dbJLabDiscr.db -- DB file
The output
The output is accessible via PV hallddisc1:JLabDiscr. It has a type of aSubRecord.
Its INPA field setups the card number (Will be configured once during IOC initilaztion). The VALA is an array of 16 contains scalers of gated triggers. The VALB is an array of 16 contains scalers of gated TDC values. The VALC is an array of 16 contains scalers of ungated triggers. The VALD is an array of 16 contains scalers of ungated TDC values. The VALE is a signle scalers of gated reference clock. The VALF is a signle scalers of ungated reference clock.
