I saw the same question here and i tried to follow the example but i ran into errors when declaring my signals. In specific:
#Error: COMP96_0015: Pipeline.vhd : (52, 44): ';' expected.
Here is my code:
library IEEE;
use IEEE.STD_LOGIC_1164.all;
entity Pipeline isgeneric (
VECTOR_WIDTH: natural := 128;
VECTOR_DEPTH: natural := 7
); port(
ImVal : in STD_LOGIC_VECTOR(9 downto 0);
RA : in STD_LOGIC_VECTOR(127 downto 0);
RB : in STD_LOGIC_VECTOR(127 downto 0);
RC : in STD_LOGIC_VECTOR(127 downto 0);
OpCode : in STD_LOGIC_VECTOR(10 downto 0);
RT : in STD_LOGIC_VECTOR(127 downto 0);
Clk: in STD_LOGIC;
Reset: in STD_LOGIC;
OutVal : out STD_LOGIC_VECTOR(127 downto 0)
);
end Pipeline;
architecture Behavioral of Pipeline is
type shift_reg_type1 is array (natural range<>) of std_logic_vector(127 downto 0);
type shift_reg_type2 is array (natural range<>) of std_logic_vector(10 downto 0);
type shift_reg_type3 is array (natural range<>) of std_logic_vector(9 downto 0);
signal shift_regA: shift_reg_type1(0 to 6)(127 downto 0);
signal shift_regB: shift_reg_type1(0 to 6)(127 downto 0);
signal shift_regC: shift_reg_type1(0 to 6)(127 downto 0);
signal shift_regT: shift_reg_type1(0 to 6)(127 downto 0);
signal OpCode_reg: shift_reg_type2(0 to 6)(10 downto 0);
signal ImVal_reg: shift_reg_type3(0 to 6)(9 downto 0);
begin
end Behavioral;
It is complaining about my signal declarations but i do not understand why.
The signal declarations are wrong as the error message say. Moreover it expects a semicolon because the statement is complete, but your code has two range constraints per signal...
signal shift_regA: shift_reg_type1(0 to 6);
signal shift_regB: shift_reg_type1(0 to 6);
signal shift_regC: shift_reg_type1(0 to 6);
signal shift_regT: shift_reg_type1(0 to 6);
signal OpCode_reg: shift_reg_type2(0 to 6);
signal ImVal_reg: shift_reg_type3(0 to 6);
shift_reg_type1
is already constraint to 127..0. So can't constraint shift_regA
again in the second dimension. Btw. there is no second dimension, because it's a 1 dimensional array of 1 dimensional elements.