Subband/Freq from rspctl

[Error323]

Currently the 8 subbands are fixed from 590 til 604 for X polarization in code. We need to obtain these values from querying the sdo (subband data output) mode on the stations:

rspctl --sdo

[hsuyeep]

Since we mostly will not be able to run cmdClients on the station LCUs, and since the rspctl is a command guarenteed (I think?) to exit, maybe it is better to do this via an ssh -c for the setting and querying of the chosen subbands?

[hsuyeep]

After discussions with the LOFAR guys on security issues, it is decided that we will provide them with a script that we can call. We get access on the stations to execute only this script. The LOFAR side will validate the script and add it to the station code repository.

[hsuyeep]

Created script runaartfaacrspctl.py which takes a csv list of subbands to set with a -s or --subbands command line option. It then:

• Creates a list of 36 subbands based on the number of subbands specified. If the specified number is less than 36, sets the other a

[hsuyeep]

(contd.) sets the other subbands to 0

• Checks if the subbands lie between 0 and 511.
• Runs the command via a subprocess.
• Waits 5 secs for the hardware to update its registers.
• Queries the subbands which have been set, compares them with the specified subbands.
• Returns -1 if the comparison fails, 0 if the command succeeds.

Script tested on CS002C. Sample interaction:

[lofarsys@CS002C ~]$ ./runaartfaacrspctl.py -s 8,9,10,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4 4
<-- Running command:  ['rspctl', '--sdo=8,9,10,2,3,4,5,6,7,1,2,3,4,5,6,7,1,2,3,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0']
log4cplus:ERROR Unable to open file: /opt/lofar/var/log/rspctl.log
log4cplus:ERROR Unable to open file: /opt/lofar/var/log/rspctl.log
rcumask.count()=96
Cmd output is : bits per sample=16
3; 144
setsdoack.timestamp=0 - Thu, 01 Jan 1970 00:00:00.000000  +0000

log4cplus:ERROR Unable to open file: /opt/lofar/var/log/rspctl.log
log4cplus:ERROR Unable to open file: /opt/lofar/var/log/rspctl.log
<-- AARTFAAC subbands successfully set.
[lofarsys@CS002C ~]$