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Task #9611

Milestone #9608: Down Converter Test

ACNET devices for plotting DDC buffers

Added by John Diamond about 5 years ago. Updated about 5 years ago.

Status:
Closed
Priority:
Normal
Assignee:
John Diamond
Category:
bpmacsys
Start date:
07/13/2015
Due date:
% Done:

100%

Estimated time:
8.00 h
Spent time:
13.00 h
Duration:

Description

ACNET devices that we can use to plot the DDC buffers at the end of the 0x20 cycle.

History

#1 Updated by John Diamond about 5 years ago

  • Tracker changed from Milestone to Task

#2 Updated by John Diamond about 5 years ago

  • Subject changed from ACNET devices for reading out DDC buffers to ACNET devices for plotting DDC buffers

#3 Updated by John Diamond about 5 years ago

  • % Done changed from 0 to 20

Verified that we can program a raw measurement and readout with the state machine then read it out with the ACNET raw data devices.
Had to fight a bit with the ees-buildroot environment in order to build bpmacsys on adlinuxdev for the first time.
Will now move on to implementing the DDC readout devices using the raw readout devices as a template.

#5 Updated by John Diamond about 5 years ago

Implemented BPMDevice methods for returning the following turn-by-turn data attributes:
  • Position (attribute 0x02)
  • Magnitude (attribute 0x03)
  • I data (attribute 0x04)

#6 Updated by John Diamond about 5 years ago

  • % Done changed from 20 to 60

#7 Updated by John Diamond about 5 years ago

  • % Done changed from 60 to 80
Created the following ACNET devices for testing the TBT data methods in BPMDevice:
  • Z:HIABOO, Z:HIBBOO - Turn-by-turn I data
  • Z:HMABOO, Z:HMBBPP - Turn-by-turn magnitude data
  • Z:HPTBOO - Turn-by-turn position

#8 Updated by John Diamond about 5 years ago

Was encountering divide-by-zero when requesting TBT data. Added the beam intensity threshold check to BPM::calculatePosition to fix this.

#9 Updated by John Diamond about 5 years ago

Receiving bad offset/length errors when attempting to read more than 100 points from Z:HIABOO test device (TBT I data).

#10 Updated by John Diamond about 5 years ago

  • Status changed from New to Closed
  • % Done changed from 80 to 100

Receiving bad offset/length errors when attempting to read more than 100 points from Z:HIABOO test device (TBT I data).

Forgot about the cdev configuration file (bbpmts.conf) that also includes a maximum length (was set to 101).

Set the TBT ACNET devices to the maximum length: 32764 (not sure why, but I can't use 32768).

#11 Updated by John Diamond about 5 years ago

  • Status changed from Closed to Assigned

Forgot that we need to make the offset work as a page number...

#12 Updated by John Diamond about 5 years ago

  • Status changed from Assigned to Feedback
  • % Done changed from 100 to 90

Interpreting the offset as a page number won't work with Synoptic array plots. The Array widget will divide the request for 8000+ samples into four requests of 2048 or less. This assumes that the offset is a real array index and ultimately leads to a seg fault.

E-mailed Linden asking if we could change this behavior. Will find out from Charlie when his "big array" support in ACNET will be finished...

#13 Updated by John Diamond about 5 years ago

  • Status changed from Feedback to Resolved
  • % Done changed from 90 to 100

Keeping the offset-as-a-page-index behavior in for now.
Marking this ticket as resolved and putting the Synoptic page ticket on hold until I hear from Linden.

#14 Updated by John Diamond about 5 years ago

  • Status changed from Resolved to Closed

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