P1076 May 14, 2015 Meeting Minutes

Attendees:

* Main.LievenLemiengre * Main.JimLewis * BrentHayhoe * Main.ErnstChristen * Main.DanielKho

Agenda:

Meeting Agenda

• Review Interfaces
• Interface Proposals
  • From VHDL-2008: ft17 interface brief - Jim's old stuff Longer Doc (but nn better than brief): ft17 with use cases
  • Records with Directional Subtypes - Peter Flake
  • Interface Construct and Port Mode Configurations - Brent
  • Bus Mode - Could work with other proposals - defer to future rev
  • Interface Attributes - John Aasen can be adapted to work with other proposals
• Interface Requirements
  • Used on entity interface or subprogram interface
  • Support composite signals of some sort
  • ?Support composite signals with unconstrained elements (similar to ports)?
  • ?Support existing records?
  • VHDL AMS (terminals, quantities)
  • ?Shared Variables/ protected types?
  • ?Support generics? Proposal to add generics to protected types
  • Support composition of interfaces - an interface can be made up of other interfaces
  • Issues with parsing: MyIfPort : MyIfMode [resolution function] MyIfType ;
    • Can this be addressed with syntax of some sort: MyIfPort : <MyIfMode> MyIfType ;
  • What kind of object is an interface? Signal?
  • Composition directly on an interface
  • Decomposition of elements and type/class of object
  • Support conjugate and monitor
    • modport slave is master'conjugate ;
  • Bidirectional connection support with multiple masters
  • Simple enough for basic stuff, but also support advanced
  • Can an interface be in an expression. Can we assign to a subset of elements of an interface?
  • ?Brent: Interface separate section? - with generic map and port map internally
  • Lieven: an interface looks alot like a component - however a component has specific direction
    • Look at old OO docs that uses Entities as the basis for OO
    • To be interface like would need some direction control adaptability

• Next Steps
  • Review Requirements here
  • Review Referenced proposals (OO, ...)

Review and Approve Meeting Minutes:

• Motion: Brent 2nd:Ernst

Next Meeting: Thursday May 28, 2015 11 am Pacific

Previous Meeting: Thursday April 30, 2015