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-- GHDL Run Time (GRT) - VCD generator.
-- Copyright (C) 2002 - 2014 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with System;
with Grt.Types; use Grt.Types;
with Grt.Vhdl_Types; use Grt.Vhdl_Types;
with Grt.Avhpi; use Grt.Avhpi;
with Grt.Rtis;
package Grt.Vcd is
-- Abstract type for IO.
type Vcd_Put_Acc is access procedure (Str : String);
type Vcd_Putc_Acc is access procedure (C : Character);
type Vcd_Close_Acc is access procedure;
Vcd_Put : Vcd_Put_Acc;
Vcd_Putc : Vcd_Putc_Acc;
Vcd_Close : Vcd_Close_Acc;
-- VCD type of an object
type Vcd_Var_Type is
(
-- Incompatible vcd type
Vcd_Bad,
-- A user-defined enumerated type (other than bit or boolean)
Vcd_Enum8,
-- Boolean
Vcd_Bool,
-- 32bit integer
Vcd_Integer32,
-- 64bit float
Vcd_Float64,
-- A bit type
Vcd_Bit, Vcd_Stdlogic,
-- A bit vector type
Vcd_Bitvector, Vcd_Stdlogic_Vector,
-- Any array (that is not a vector)
Vcd_Array,
-- Any record
Vcd_Struct
);
subtype Vcd_Var_Vectors is Vcd_Var_Type
range Vcd_Bitvector .. Vcd_Stdlogic_Vector;
-- Which value to be displayed: effective or driving (for out signals).
type Vcd_Value_Kind is
(Vcd_Effective, Vcd_Driving, Vcd_Variable, Vcd_Value_Bad);
subtype Vcd_Value_Valid is
Vcd_Value_Kind range Vcd_Effective .. Vcd_Variable;
-- For signals.
subtype Vcd_Value_Signals is Vcd_Value_Kind
range Vcd_Effective .. Vcd_Driving;
type Verilog_Wire_Info (Vtype : Vcd_Var_Type := Vcd_Bad) is record
Val : Vcd_Value_Kind;
-- Access to an array of signals or access to the value.
Ptr : System.Address;
case Vtype is
when Vcd_Var_Vectors =>
-- Vector bounds.
Vec_Range : Ghdl_Range_Ptr;
when Vcd_Enum8 =>
-- Base type.
Rti : Rtis.Ghdl_Rti_Access;
when Vcd_Array =>
Arr_Rti : Rtis.Ghdl_Rti_Access;
Arr_Bounds : System.Address;
when others =>
null;
end case;
end record;
procedure Get_Verilog_Wire (Sig : VhpiHandleT;
Info : out Verilog_Wire_Info);
-- Number of signals in INFO (at least one).
function Get_Wire_Length (Info : Verilog_Wire_Info) return Ghdl_Index_Type;
-- Return TRUE if last change time of the wire described by INFO is LAST.
-- Used by vcd to know if a signal has changed and should be dumped.
function Verilog_Wire_Changed (Info : Verilog_Wire_Info;
Last : Std_Time)
return Boolean;
-- Return TRUE if there is an event on the wire, for the current cycle.
function Verilog_Wire_Event (Info : Verilog_Wire_Info) return Boolean;
-- Return a pointer to the value of a wire.
function Verilog_Wire_Val (Info : Verilog_Wire_Info) return Ghdl_Value_Ptr;
function Verilog_Wire_Val (Info : Verilog_Wire_Info; Idx : Ghdl_Index_Type)
return Ghdl_Value_Ptr;
procedure Register;
end Grt.Vcd;
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