Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I got error because of not proper use of std_logic and bit, please help me in solving

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

-- Company:

-- Engineer:

--

-- Create Date: 15:16:54 02/14/2011

-- Design Name:

-- Module Name: glu - Behavioral

-- Project Name:

-- Target Devices:

-- Tool versions:

-- Description:

--

-- Dependencies:

--

-- Revision:

-- Revision 0.01 - File Created

-- Additional Comments:

--

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

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.STD_LOGIC_ARITH.ALL;

use IEEE.STD_LOGIC_UNSIGNED.ALL;

---- Uncomment the following library declaration if instantiating

---- any Xilinx primitives in this code.

--library UNISIM;

--use UNISIM.VComponents.all;

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

--ENTITY Declarations

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

ENTITY glu is

port(

Data_reg: OUT STD_LOGIC_vector(11 downto 0);

Creg: out STD_LOGIC_vector(4 downto 0));

end glu;

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

--Architecture Body

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

architecture Behavioral of glu is

TYPE Memory IS ARRAY (0 TO 1026) OF STD_LOGIC_VECTOR(7 DOWNTO 0);

SIGNAL Ram : Memory;

rows and 8 bit in each rowSIGNAL Temp1,Temp2,Temp3: STD_LOGIC_VECTOR(15 DOWNTO 0) ;

SIGNAL A1A0,CS: STD_LOGIC_VECTOR(1 DOWNTO 0) ;

SIGNAL Temp2,Mirror_Num10 ,Mirror_Num20,Axis10,Temp10,Temp40,Temp3:STD_LOGIC_VECTOR(15 DOWNTO 0);

SIGNAL Temp1,Mirror_Num ,Mirror_Num2 ,Temp4,Axis : BIT_VECTOR(15 DOWNTO 0);

SIGNAL Cur_Add: STD_LOGIC_VECTOR(31 downto 0);

SIGNAL Base_Add:STD_LOGIC_VECTOR:=x"00000000";

SIGNAL Mnum_Add:STD_LOGIC_VECTOR:=x"00000403";

SIGNAL flag:STD_LOGIC_VECTOR:= x"00000400";

SIGNAL Axis_Add:STD_LOGIC_VECTOR:=x"00000401";

SIGNAL X:STD_LOGIC_VECTOR:="000000000000000";

SIGNAL Y :STD_LOGIC_VECTOR:="0000000000000010";

BEGIN

process(Ram(Conv_Integer(flag))) -- Process begin and we take the flag in sensitivity list.

BEGIN

IF ( Ram(Conv_Integer(flag))='1') THEN

Mirror_Num(15 DOWNTO 8) <= CONV_STD_LOGIC_VECTOR (Ram(Conv_Integer(Mnum_Add)));

--Store the value of the mirror number in the Temp1

Mirror_Num(7 DOWNTO 0) <= CONV_STD_LOGIC_VECTOR (Ram(Conv_Integer(Mnum_Add+1)));

Axis(15 DOWNTO 8) <= CONV_STD_LOGIC_VECTOR (Ram(Conv_Integer(Axis_Add)));

--Store the value for choosing X or Y axis in temp2

Axis(7 DOWNTO 0) <= CONV_STD_LOGIC_VECTOR (Ram(Conv_Integer(Axis_Add+1)));

Mirror_Num2 <= Mirror_Num sla 1 ; --Multiply mirror number by 2

If(Axis=X) THEN --Check for the X axis

Cur_Add<= (Base_Add + (Mirror_Num sla 2) + Axis); --If we have to move the mirror in X axis then current address of BRAM is

Temp1 <= Mirror_Num2 + Axis ;

ELSIf(Axis=Y) THEN --Check for the Y axis

Cur_Add<= (Base_Add + (Mirror_Num sla 2) + Axis); --If we have to move the mirror in X axis then current address of BRAM is

Temp1 <= Axis sra 1 + Mirror_Num2;

END IF;

Temp4 <= Temp1 sra 2;

Mirror_Num10 <= CONV_STD_LOGIC_VECTOR( Mirror_Num) ;

Mirror_Num20 <= CONV_STD_LOGIC_VECTOR ( Mirror_Num2 ) ;

Axis10 <= CONV_STD_LOGIC_VECTOR ( Axis ) ;

Temp10 <= CONV_STD_LOGIC_VECTOR ( Temp1 ) ;

Temp40 <= CONV_STD_LOGIC_VECTOR ( Temp4 ) ;

DATA_reg(11:8)<=Ram(Conv_Integer(Cur_Add))(3:0); -- Put the value of the current address of BRAM to Data reg

DATA_reg(7:0)<=Ram(Conv_Integer(Cur_Add+1));

Temp2 <= conv_STD_LOGIC_vector((conv_integer(Temp1) mod 4),16); --Calculation for the Position in Particular DAC according to mirrir number and axis selection.

A1A0 <= Temp2(1 DOWNTO 0);

Temp3 <= conv_STD_LOGIC_vector(conv_integer(Temp4),16) ;

IF(Temp3="0000000000000000") THEN

CS<="01";

ELSIF(Temp3="0000000000000001") THEN

CS<="10";

END IF;

--Calculation for chip select

CS <= Temp3(1 DOWNTO 0);

Creg(4 DOWNTO 3) <= CS ; -- Put the value for chip select and A1A0 in the control registor.

Creg(2 DOWNTO 1) <= A1A0 ;

Creg(0) <= '0' ; -- set the value of lsb of control registor to 0 for R/(W)bar

-- If flag=0 then exit.

END IF;

END PROCESS;

Creg(4 DOWNTO 3) <= "11" ;

flag <= 0;

END Behavioral;

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

9 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    a std_logic_vector is not a bit vector.

    Why not just declare Temp1,Mirror_Num ,Mirror_Num2 ,Temp4,Axis as std_logic_vectors?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    You might want to try using the numeric_std package. That has signed and unsigned types that support sla and sra, and you can convert them to std_logic_vector.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Actually can u tell me the instruction for converting std_logic_vector to bit_vector.

    And from integer to bit_vector and vice versa.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    You can just use the to_stdlogicvector/to_stdlogic/to_bitvector/to_bit functions in the std_logic_1164 library.

    The numeric_std library has sra and sla functions for unsigned and signed types, that you can convert to and from integer.

    signal s : signed(7 downto 0);

    ....

    s <= s sra 5;

    i <= to_integer(s);
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    I use this ,

    signal s : signed(7 downto 0);

    ....

    mul<= mul sra 5;

    temp<= to_integer(mul);

    but this gives me error defination of operator match here
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    have you included the numeric_std library and deleted the std_logic_arith library?

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    I use these library

    library IEEE;

    use IEEE.STD_LOGIC_1164.ALL;

    use IEEE.STD_LOGIC_ARITH.ALL;

    use IEEE.numeric_std.all;
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    The std_logic_arith library defines its own signed and unsigned types, but does not include sra and srl functions. It is also NOT an IEEE standard library (neither is std_logic_signed/unsigned)

    numeric_std defines its own signed/unsigned types and also includes sra/srl functions, and it IS the IEEE standard library. Using numeric_std and std_logic_arith in the same file causes conflicts that will cause neither of them to work (unless you reference everything specifically).

    The answer is to delete std_logic_arith.