mti_FirstSignal()

Gets the first VHDL signal in a region.

Syntax

signal_id = mti_FirstSignal( region_id ) 

Returns

Name	Type	Description
signal_id	mtiSignalIdT	A handle to the first VHDL signal in a region or NULL if there are no signals in the region

Arguments

Name	Type	Description
region_id	mtiRegionIdT	A handle to a VHDL region

Description

mti_FirstSignal() returns a handle to the first VHDL signal in the specified region. mti_NextSignal() can be used to get the subsequent VHDL signals in the specified region.

mti_FirstSignal() resets the region used by previous calls to mti_FirstSignal() and mti_NextSignal(); therefore, mti_NextSignal() always uses the region set by the latest call to mti_FirstSignal().

Related functions

mti_FindPort()

mti_FindSignal()

mti_NextSignal()

Example

FLI code

#include <mti.h>

void printSignals( mtiRegionIdT region, int indent )
{
  mtiSignalIdT sigid;

  for ( sigid = mti_FirstSignal( region ); sigid;
        sigid = mti_NextSignal() ) {
      if ( sigid ) {
          mti_PrintFormatted( "%*cSignal %s\n", indent, ' ',
                                mti_GetSignalName( sigid ) );
      }
  }
}

void printHierarchy( mtiRegionIdT region, int indent )
{
  char *       region_name;
  mtiRegionIdT regid;

  region_name = mti_GetRegionFullName( region );
  mti_PrintFormatted( "%*cRegion %s\n", indent, ' ', region_name );
  indent += 2;
  printSignals( region, indent );
  for ( regid = mti_FirstLowerRegion( region );
        regid; regid = mti_NextRegion( regid ) ) {
      printHierarchy( regid, indent );
  }
  mti_VsimFree( region_name );
}

void loadDoneCB( void * param )
{
  mti_PrintMessage( "\nLoad Done phase:\n" );
  printHierarchy( mti_GetTopRegion(), 1 );
}

void initForeign(
  mtiRegionIdT       region,   /* The ID of the region in which this     */
                               /* foreign architecture is instantiated.  */
  char              *param,    /* The last part of the string in the     */
                               /* foreign attribute.                     */
  mtiInterfaceListT *generics, /* A list of generics for the foreign model.*/
  mtiInterfaceListT *ports     /* A list of ports for the foreign model.   */
)
{
  mti_AddLoadDoneCB( loadDoneCB, 0 );
  mti_PrintMessage( "\nElaboration phase:\n" );
  printHierarchy( mti_GetTopRegion(), 1 );
} 

HDL code

entity for_model is
end for_model;

architecture a of for_model is
  attribute foreign of a : architecture is "initForeign for_model.sl";
begin
end a;

entity inv is
  generic ( delay : time := 5 ns );
  port ( a : in bit;
         b : out bit
       );
end inv;

architecture b of inv is
  signal count : integer := 0;
begin
  b <= a after delay;

  p1 : process( a )
  begin
    count <= count + 1 after 0 ns;
  end process;
end b;

entity mid is
end mid;

architecture a of mid is

  signal s1 : bit := '0';
  signal s2 : bit := '0';
  signal s3 : bit := '0';
  signal s4 : bit := '0';

  component for_model is
  end component;

  for all : for_model use entity work.for_model(a);

  component inv is
    generic ( delay : time := 5 ns );
    port ( a : in bit;
           b : out bit
         );
  end component;

begin

  flip : inv port map ( s3, s4 );

  i1 : for_model;

  s1 <= not s1 after 5 ns;
  s3 <= not s3 after 5 ns;

  toggle : inv port map ( s1, s2 );

end a;

entity top is
end top;

architecture a of top is
  component mid is
  end component;
begin
  inst1 : mid;
end a; 

Simulation output

% vsim -c top
Reading .../modeltech/sunos5/../tcl/vsim/pref.tcl 

# 5.4b

# vsim -c top 
# Loading .../modeltech/sunos5/../std.standard
# Loading work.top(a)
# Loading work.mid(a)
# Loading work.inv(b)
# Loading work.for_model(a)
# Loading ./for_model.sl
# 
# Elaboration phase:
#  Region /top
#   Region /top/inst1
#    Signal s4
#    Signal s3
#    Signal s2
#    Signal s1
#    Region /top/inst1/i1
#    Region /top/inst1/flip
#     Signal count
#     Signal b
#     Signal a
# 
# Load Done phase:
#  Region /top
#   Region /top/inst1
#    Signal s1
#    Signal s2
#    Signal s3
#    Signal s4
#    Region /top/inst1/flip
#     Signal a
#     Signal b
#     Signal count
#    Region /top/inst1/i1
#    Region /top/inst1/toggle
#     Signal a
#     Signal b
#     Signal count
VSIM 1> run 10
VSIM 2> quit 

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