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Entry  Sun Dec 7 13:11:57 2014, manasa, Summary, General, Frequency Offset Locking - To Do List FOLtodolist.pdf
    Reply  Mon Dec 8 15:54:39 2014, manasa, Summary, General, Dec 8 - Check Frequency Counter module 
       Reply  Mon Dec 8 20:53:51 2014, diego, Summary, General, Dec 8 - Check Frequency Counter module 
          Reply  Tue Dec 9 16:06:46 2014, diego, Summary, General, Dec 8 - Check Frequency Counter module 
    Reply  Tue Dec 9 00:30:27 2014, manasa, Summary, General, Dec 9 - Elaborate to do list FOL_FiberChassis.pdf
       Reply  Tue Dec 9 16:07:16 2014, manasa, Summary, General, Dec 9 - FC module and fiber chassis FCmodule.png
    Reply  Wed Dec 10 16:12:29 2014, manasa, Summary, General, Dec 10 - PSL table FiberMod_front.jpgFOL_fiber.jpg
       Reply  Thu Dec 11 12:50:12 2014, manasa, Summary, General, PSL table optical layout 
          Reply  Thu Dec 11 23:34:06 2014, manasa, Summary, General, PSL table optical layout 
             Reply  Fri Dec 12 02:30:25 2014, Jenne, Summary, General, PSL table optical layout 
    Reply  Fri Dec 12 14:38:39 2014, manasa, Summary, General, Frequency Offset Locking - To Do List (Revised) FOLtodolist.pdf
       Reply  Fri Dec 12 15:19:04 2014, manasa, Summary, General, Dec 12 - PSL table PSLtoFiber.pngPSLfiberChassis.pngPSLfiberChassis.png
       Reply  Wed Dec 17 11:57:56 2014, manasa, Summary, General, Y arm optical layout 58.png
Message ID: 10766     Entry time: Mon Dec 8 20:53:51 2014     In reply to: 10765     Reply to this: 10770
Author: diego 
Type: Summary 
Category: General 
Subject: Dec 8 - Check Frequency Counter module 

Quote:

Quote:

Attached is the timeline for Frequency Offset Locking related activities. All activities will be done mostly in morning and early afternoon hours.

[Diego, Manasa]

We looked into the configuration and settings that the frequency counters (FC) and Domenica (the R pi to which the FCs talk to) were left at . After poking around for a few hours, we were able to readout the FC output and see it on StripTool as well.

We have made a list of modifications that should be done on Domenica and to the readout scripts to make the FC module automated and user-friendly.

I will prepare a user manual that will go on the wiki once these changes are made.

 

 OUTDATED: see elog 10779

 

I started working on the scripts/FOL directory (I did a backup before tampering around!):

  • I still need to make some serious polishing in the folder, and into the Raspberry Pi itself, in order to have a clean and understandable environment;
  • as of now, I created an single armFC.c program, which takes as arguments the device (/dev/hidraw0 for the X arm, and /dev/hidraw1 for the Y arm) and the value to write into the frequency counter (0x3 for initialization and 0x2 for actual use); hence, no more need for recompilation!
  • I improved the codetorun.py script (and gave the fellow a proper name, epics_channels.py) which handles the initialization AND the availability of the channels;
  • On the Raspberry Pi, I created two init scripts, /etc/init.d/epics_server.sh and /etc/init.d/epics_channels.sh, which start at the end of the boot process with default runlevels; the former starts the softIOc process (epics itself), while the latter executes the constantly running epics_channels.py script; as they are services, they can be started/stopped with the usual sudo /etc/init.d/NAME start|stop|restart

 

As a result, as soon as the Raspberry Pi completes its boot process, the two beatnote channels are immediately available.

 

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