TDMMtgMinutesJun1411 < P10761

P10761 Web>TDMMtgMinutesJun1411 (2016-01-24, ErnstChristen) (raw view)EditAttach
-- Main.JoachimHaase - 2011-06-15
---++ IEEE P1076.1 Working Group - Table-Driven Modeling Project - Telco Meeting Minutes of June 14, 2011

*Status:* approved on August 22, 2011<em><br /></em>

<br />%TOC%
---+++ Attendees
   * Alain Vachoux
   * Arpad Muranyi
   * Ernst Christen
   * Joachim Haase (chair, meeting convener, note taker)
---+++ Agenda
   * Call to order
   * Volunteer for minutes
   * Approval of agenda
   * Review and approve minutes from the last meeting
   * Discussion on action items of the last meeting
   * Next meeting
   * AOB
   * Adjourn
---+++ Call to order on June 14, 2011 at 8:05am PDT (17:05 CEST)

Joachim welcomes Ernst and starts presenting the [[%PUBURL%/%WEB%/ProjectTableDrivenModeling/1076.1_table_driven_modeling_2011_06_14.ppt][meeting slides]].
---+++ Volunteer for minutes

Joachim takes the notes.
---+++ Approval of agenda

Agenda unanimously approved.
---+++ Review and approve minutes from last meeting

Ernst agreed to approve the Minutes of the May 02, 2011 meeting.
---+++ Discussion on function interfaces

Ernst added comments to "Table-Driven Modeling in VHDL-AMS - Summary" ([[%PUBURL%/%WEB%/ProjectTableDrivenModeling/2011-05-09_tdm_procedures.pdf][pdf]]) in the related document "Table-Driven Modeling in VHDL-AMS - Summary of problems" ([[%PUBURL%/%WEB%/ProjectTableDrivenModeling/2011-05-12_tdm_procedures_problems.pdf][pdf]]) where problems concerning use of VHDL-2002/VHDL-2008 were summarized.

It was agreed to start the test implementation using available implementations of VHDL simulation programs and adapt this later on to VHDL-201x requirements.

Alain distributed the following questions before the teleconf: "
   * I think that the PREPARE_TABLE_DATA function could be also used to perform checks such as to catch errors or misuses as mentioned in the top of page 5 or, e.g., specifying the TDM_RATIONAL interpolation method for real-valued interpolation.
   * The VHDL(-AMS) implementation of the PREPARE_TABLE_DATA function does not need to be "efficient", but only functionally correct. It is likely that there will be specific, more efficient, C implementations once the standard is out.
   * I'm still missing a user's view on how to use the package. Also, types such as TABLE_DATA_REAL would deserve more detailed descriptions, e.g., what are the roles of the record fields (not necessarily directly understandable from the field names).
   * Function names should rather be verbs, so I would propose to change INTERPOLATION to LOOKUP or something equivalent. Moreover, the function does also extrapolation, so lookup is more appropriate to me.
   * The TDM_EXTRAP method name is not well chosen, but I do not have another proposal for the moment. Moreover, I understand that the idea is to keep using the same interpolation method for extrapolated points, but then it seems that we are missing independent values.
   * A minor issue: avoid tab characters in source code. They can destroy the alignment and then the readability."

The result of the discussion was
   * The standard proposal shall describe the package header and usage of functions. This allows different implementation of the functions. The reference implementation of the package body shall provide a reference to check the functionality of the functions.
   * Ernst will check how specific requirements on the declaration of types TABLE_DATA_REAL and TABLE_DATA_COMPLEX can be avoided.
   * Better names for identifiers INTERPOLATION (e.g. LOOKUP) and TDM_EXTRAP must be found.
---+++ Next meeting

The next web meeting is planned on July 25, 2011 at 8am PDT or 17:00 CEST.
---+++ AOB

None.
---+++ Adjourn

Joachim adjourns the meeting at 18:10 CEST.
---+++ Action items

Joachim:
   * Update of the reference implementation

Ernst:
   * Check possibilities to &bdquo;hide&ldquo; declaration of a type like TABLE_DATA_REAL in the standard proposal

Alain:
   * Proposal/Looking for test cases
Topic revision: r5 - 2016-01-24 - 02:35:21 - ErnstChristen
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