Scicos Block
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Generic block

Contents

• Generic block
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • Authors

Palette

• Others - Others palette

Description

The block provides a generic interfacing function but the computational function needs to be defined separately, either as a Scilab function or a Fortran or a C function. Besides the name of the function, user should specify information such as the type, whether or not the block contains a direct feed-through term. The function realising computational functions of generic blocks of a Scicos diagram must be saved along with the diagram and loaded or dynamically linked before simulation.

Dialog box

• Simulation function
  Name of the function to be loaded.
  Properties : Type 'str' of size 1

• Function type
  Type of the computational function supported by Scicos.
  Properties : Type 'vec' of size 1

• Input ports sizes
  Number and size of regular input ports.
  Properties : Type 'mat' of size [-1,2]

• Input ports type
  Set the datatype of the regular input ports.
  Properties : Type 'vec' of size -1

• Output port sizes
  Number and size of regular output ports.
  Properties : Type 'mat' of size [-1,2]

• Output ports type
  Set the datatype of the regular output ports.
  Properties : Type 'vec' of size -1

• Input event ports sizes
  a vector of ones, size of event input ports. The size of the vector gives the number of event input ports.
  Properties : Type 'vec' of size -1

• Output events ports sizes
  a vector of ones, size of event output ports. The size of the vector gives the number of of event output ports.
  Properties : Type 'vec' of size -1

• Initial continuous state
  A column vector of Initial State Conditions.
  Properties : Type 'vec' of size -1

• Initial discrete state
  A column vector Initial discrete Conditions.
  Properties : Type 'vec' of size -1

• Initial object state
  A Scilab list that defines the initial object state (oz).
  Properties : Type 'lis' of size -1

• Real parameters vector
  column vector. Any parameters used in the block can be defined here as a column vector.
  Properties : Type 'vec' of size -1

• Integer parameters vector
  column vector. Any integer parameters used in the block can be defined here as a column vector.
  Properties : Type 'vec' of size -1

• Object parameters list
  A Scilab list that defines the list of the Object parameters (opar).
  Properties : Type 'lis' of size -1

• Number of modes
  Number of Right hand side functions in the system.
  Properties : Type 'vec' of size 1

• Number of zero_crossings
  Number of zero-crossing surfaces.
  Properties : Type 'vec' of size 1

• Initial firing vector
  vector. Size of this vector corresponds to the number of event outputs. The value of the i-th entry specifies the time of the preprogrammed event firing on the i-th output event port. If less than zero, no event is preprogrammed.
  Properties : Type 'vec' of size sum(%6)

• Direct feedthrough
  character "y" or "n", specifies if block has a direct input to output feedthrough.
  Properties : Type 'vec' of size 1

• Time dependence
  Time dependance : character "y" or "n", specifies if block output depends explicitly on time.
  Properties : Type 'vec' of size 1

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• regular inputs:
  - port 1 : size [1,1] / type 1
  
• regular outputs:
  - port 1 : size [1,1] / type 1
  
• number/sizes of activation inputs: 0
• number/sizes of activation outputs: 0
• continuous-time state: no
• discrete-time state: no
• object discrete-time state: no
• name of computational function: sinblk

Interfacing function

• SCI/macros/scicos_blocks/Misc/generic_block3.sci [view code]

Computational function

• SCI/routines/scicos/sinblk.f (Type 4) [view code]

Authors

• Alan Layec INRIA
• Ramine Nikoukhah INRIA