stracture vhdl +

7/31/2019 Stracture vhdl +

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Morteza Shabanzadeh [email protected]

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Context Clauses

Library Clause

Use Clause

Library Units

Package Declaration (optional)

Package Body (optional)

Entity Declaration

Architecture Body

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www.IranMedar.com Morteza Shabanzade


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% G A @ ' ( ? RL

LIBRARY library_name ;

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ENTITY entity_name ISGENERIC( parameter_name : string := default_value ;

parameter_name : integer := default_value );PORT(

input_name , input_name : IN STD_LOGIC;input_vector_name : IN STD_LOGIC_VECTOR( high downto low);bidir_name , bidir_name : INOUT STD_LOGIC;output_name , output_name : OUT STD_LOGIC);

END entity_name ;

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ARCHITECTURE arch_name OF entity_name ISSIGNAL signal_name : STD_LOGIC;SIGNAL signal_name : STD_LOGIC;

BEGIN-- Process Statement

-- Concurrent Procedure Call

-- Concurrent Signal Assignment

-- Conditional Signal Assignment O *. ] " O ! ` " ! P= - '*7 '*

-- Selected Signal Assignment

-- Component Instantiation Statement

-- Generate Statement

END arch_name ;

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%4" ' i L CASE expression IS

WHEN constant_value =>statement;statement;

WHEN constant_value =>statement;statement;

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WHEN OTHERS =>statement;statement;

END CASE;

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I+ &J 3& S3Y 4 **** Lprocess_label :PROCESS ( signal_name , signal_name , signal_name )

VARIABLE variable_name : STD_LOGIC;VARIABLE variable_name : STD_LOGIC;BEGIN

-- Signal Assignment Statement

-- Variable Assignment Statement

-- Procedure Call Statement

-- If Statement

-- Case Statement

-- Loop Statement

END PROCESS process_label ;

---------------------------------------------------------------

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VARIABLE variable_name : STD_LOGIC;VARIABLE variable_name : STD_LOGIC;

BEGIN

WAIT UNTIL clk_signal = '1' ; .%04 B 8 z

-- Signal Assignment Statement

-- Variable Assignment Statement

-- Procedure Call Statement

-- If Statement

-- Case Statement

-- Loop Statement

END PROCESS process_label ;

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IF expression THENstatement ;statement ;

ELSIF expression THEN

statement ;statement ;

ELSEstatement ;statement ;

END IF;

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'%4"K K K K Llabel :WITH expression SELECT

signal


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^ ' LSUBTYPE subtype_name IS type_name RANGE low_value TO high_value ;SUBTYPE array_subtype_name IS array_ type_name ( high_index DOWNTO low_index );

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'A @ ^ L COMPONENT component_name

GENERIC( parameter_name : string := default _value ; " " c * e % 'T%& parameter_name : integer := default _value ); A %(

PORT(input_name , input_name : IN STD_LOGIC;bidir_name , bidir_name : INOUT STD_LOGIC;output_name , output_name : OUT STD_LOGIC);

END COMPONENT;

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]8 G ) A ' Linstance_name : component_name

PORT MAP ( component_port => connect _ port ,component_port => connect _ port );

instance_name : component_name PORT MAP ( connect _ port , connect _ port );

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'A @ ^$ $ $ $ LPACKAGE pack_name IS

.Pack_declarations.

END pack_name ;

------------------------------------------------------PACKAGE BODY pack_name IS.

Pack_declarations.

END PACKAGE BODY pack_name ;

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1111 8888 ) ))) ; ;;;--------$ -$ -$ -$ -

----------------------------------------------------------

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PO% PO% PO% PO%5555----" 4 " 4 " 4 " 4 5 555 PO% PO% PO% PO%5555

1111 ????==== 1111 4 4 4 4 5555 ----4 4 4 4 5 555 - ---

$ -$ -$ -$ -

' ( ^ '! ! ! ! L

FUNCTION func_name ( func_inputs : in inputs_type ) RETURN output_var_type IS VARIABLE var_name : var_type ;...

BEGIN.

.

.Output_var := statement ;RETURN output ;

END func_name ;

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c@= " " 'O ( G tM tM+

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? 7 G '& ' i H0 " 0 '* IJK*L LIBRARY ieee;USE ieee.std_logic_1164.all;

ENTITY entity_name IS

PORT(data_input_name : IN INTEGER RANGE 0 TO count_value ;clk_input_name : IN STD_LOGIC;clrn_input_name : IN STD_LOGIC;ena_input_name : IN STD_LOGIC;ld_input_name : IN STD_LOGIC;count_output_name : OUT INTEGER RANGE 0 TO count_value

);

END entity_name ;

ARCHITECTURE arch_name OF entity_name ISSIGNAL count_signal_name : INTEGER RANGE 0 TO count_value ;

BEGINPROCESS ( clk_input_name , clrn_input_name )BEGIN

IF clrn_input_name = '0' THEN

count_signal_name


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G '& ' i H0 "!!!! !!!!0 '* IJK*L

LIBRARY ieee;USE ieee.std_logic_1164.all;


PORT(

d_input_name : IN STD_LOGIC;clk_input_name : IN STD_LOGIC;clrn_input_name : IN STD_LOGIC;ena_input_name : IN STD_LOGIC;q_output_name : OUT STD_LOGIC

);

END entity_name ;

ARCHITECTURE arch_name OF entity_name IS

SIGNAL q_signal_name : STD_LOGIC;

BEGIN

PROCESS ( clk_input_name , clrn_input_name )BEGIN

IF clrn_input_name = '0' THEN

q_signal_name


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G '& ' i H0 " # # # # 0 '* IJK*L

LIBRARY ieee;USE ieee.std_logic_1164.all;


PORT(

oe_input_name : IN STD_LOGIC;data_input_name : IN STD_LOGIC;tri_output_name : OUT STD_LOGIC

);

END entity_name ;

ARCHITECTURE arch_name OF entity_name ISBEGIN

PROCESS ( oe_input_name , data_input_name )BEGIN

IF oe_input_name = '0' THEN

tri_output_name

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