This meeting took place at 11:30 on Thursday 18 October 2010. Attendees: JSY, EBS, MF, DFB.

This meeting took place at 11:00 on Thursday 18 October 2010. Attendees: JSY, EBS, MF, DFB.

Conclusions

• Should be possible to implement data processing in user-space real-time task, and this architecture seems sensible - EBS to attempt proof-of-concept
• GUI should allow connections from multiple subsystems (processes) e.g. system controller, enclosure environmental controller, DL metrology
• Each GUI instance will normally be used with only one FTT or FLC system. May choose to enforce this if it simplifies the implementation
• FTT/FLC system should be able to connect with multiple GUI instances simultaneously e.g. local and control room instances (need to support simultaneous connection with ISS anyway)
  • A GUI instance or the ISS can send a command to grab control of the system; other connections become read-only and tell the user which instance has control
• Proposed usage of HGC (subject to successful trial):
  • New directory created for each contiguous recording; sequence of directories with related names for commanded sequence of recordings
  • Each directory contains an "index" FITS file plus one FITS file per dlmsg connection, each containing a single HDU

New Tasks

• EBS: Test signalling from Xenomai kernel task to user-space RT task
• ADR/EBS: Define APIs for centroiding and calculation of TT correction signal
• JSY: Design new dlmsg (dis)connection protocols for GUI
• JSY: Investigate image display in GTK/gtkmm
• JSY: Try out FITS Hierarchical Grouping Convention

This meeting will take place at 11:30 on Thursday 18 October, in the Ryle Seminar Room.

• Separate GUI process connects with multiple FTTs?

• Separate GUI process connects with multiple FTTs?

Technical Meeting #13: Software design (continued)

This meeting will take place at 11:00 on Thursday 18 October, in the Ryle Seminar Room.

Agenda

• Open Design Issues
  • Architecture of real-time code: data processing in user-space to allow floating point?
    • Common API with Alex's simulator?
  • GUI toolkit
    • C++/gtkmm or C/GTK+ ?
    • Main FLC process has minimal GUI?
  • Relationship to delay line software
  • FITS conventions:
    • Use Hierarchical Grouping Convention?
  • How to transmit dark/flatfield frames to/from ISS?
  • How to receive off-axis/dispersion offsets from UTCS via ISS?
    • May need to account for future off-axis offsets when choosing initial position of subframe on FTT Mode start