List of Additions to VHPI Information Model and API

• Subtypes
  • tolerance aspect of subtype declaration
  • tolerance group of scalar subelement
• Natures
  • scalar nature
  • composite nature
    • array nature
      • unconstrained
      • constrained
    • record nature
• Subnatures
• Objects
  • terminal
  • quantity
  • • free
    • branch
    • spectral source
    • noise source
• Ports
  • terminal port
  • quantity port
  • signal ports are not the only class of ports
• Actual ports
  • actual terminal
  • actual quantity
    • default expression
    • open
• Declarations
  • nature
  • subnature
  • terminal
  • quantity
• Alias
  • subnature indication
• Specifications
  • step limit
    • quantity list, applicable quantities
  • attribute specification
    • entity classes: nature, subnature, quantity, terminal
• Statements
  • simultaneous statements
    • simple simultaneous statement
    • simultaneous if statement
    • simultaneous case statement
    • simultaneous procedural statement
    • simultaneous null statement
  • concurrent statements
    • concurrent break statement
  • sequential statements
    • break statement
    • wait statement: real timeout expression
    • signal assignment statement: real time expression
• Attributes
  • quantity-valued attributes
    • 'DOT, 'INTEG, 'DELAYED, 'ZOH, 'LTF, 'ZTF, 'REFERENCE, 'CONTRIBUTION, 'RAMP, 'SLEW
  • signal-valued attributes
    • ABOVE
  • type-valued attributes
    • 'ACROSS, 'THROUGH
  • other attributes
    • 'LAST_EVENT[return REAL], 'TOLERANCE
• Predefined types and objects
  • real_vector
  • universal time
  • DOMAIN_TYPE, DOMAIN signal
  • function NOW[return REAL] function
  • function FREQUENCY[return REAL]
• Expressions
  • names: not terminals
• Regions
  • simultaneous procedural statement
• Elaboration
  • characteristic expression
  • contribution expression
  • structural set
  • explicit set
  • augmentation set
  • root terminal, connected terminal
• Execution
  • solver agent
  • solver invocation
  • current time [REAL]
  • integrate digital and analog simulation cycles
    • determine any new callback events
• Update
  • quantity: when solver determines an analog solution point
• Callbacks
  • object callbacks
    • quantity value change, threshold crossing
  • foreign model callbacks
    • quantity sensitivity (threshold crossing)
  • statement callbacks
    • start/end of simultaneous procedural statement
  • simulation phase callbacks
    • before/after solver invocation
    • timesteps?
• Value access
  • vhpiRealTimeT
    • use vhpi_format_value to convert between vhpiTimeT and vhpiRealTimeT
  • Forcing quantities [out of scope]
• Functions
  • new functions if required for foreign analog models and applications
    • eg, adding characteristic expressions, contribution expressions
    • - [out of scope]

-- PeterAshenden - 2010-07-20