I finished the polishing in the scripts/FOL directory, this is the current status and this post replaces my two previous posts on the subject:

• the Raspberry Pi operates locally: everything is in its /opt/FOL directory, which is a mirror of /opt/rtcds/caltech/c1/scripts/FOL/ ; some backup/sync scripts should be set up, tell me what kind (sync direction, place to call the script from, etc..) is recommended and I'll set it up;

• the /opt/FOL directory contains:
  • ADC_interface                 : Akhil's ADC interface software and dependencies;
  • akhilTestCodes                : Akhil's work directory with his programs and data;
  • backup                             : two zip files with a full backup of the FOL stuff for both chiara and domenica at 2014/12/08, before my work on the directory;
  • fcreadoutApp                   : the EPICS app compiled on domenica. I didn't modify anything in particular here, as I don't know much about EPICS Apps; I'm not even sure if it is used by now, as I launch EPICS manually by just giving him a .db file (see below).
  • armFC*                        : it is the single program that constantly fetches data for the channels: it takes as arguments the RPi 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, there is no more need for recompilation!
  • epics_channels.py :  this is the new version of the old codetorun.py script; it handles the initialization and the availability of the two beatnote channels;
  • fcreadout / freqCountIOC : these are the binaries of the EPICS apps that I found on chiara/domenica; they are not used as of now, but could be useful;
  • fcreadout.db           : it is the database file that is loaded by EPICS to handle the channels;
  • FOLPID.pl              : the Perl PID controller; it is still the old version, we will work on this one later on (see Manasa's schedule at elog 10760 for info)

• Domenica's environment:
  • as I said, everything runs locally from /opt/FOL;
  • in particular, I added in /etc/inittab two lines that launch EPICS and the python script for the channels; respawn is supported so these processes should always be available. For this to happen, DO NOT MOVE armFC, epics_channels.py and fcreadout.db from the /opt/FOL directory on domenica!
  • I added a udev rule in /etc/udev/rules.d/98-hidraw-permissions.rules to let the controls user access the /dev/hidraw* devices without having to sudo all the time;
  • I updated the ~/.bashrc and /opt/epics/epics-user-env.sh files to fix syntax errors and add some aliases we usually use.