list_ch13_01_font_rom.vhd

VHDL FFT SOURCECODE great one

-- Listing 13.1
-- ROM with synchonous read (inferring Block RAM)
-- character ROM
--   - 8-by-16 (8-by-2^4) font
--   - 128 (2^7) characters
--   - ROM size: 512-by-8 (2^11-by-8) bits
--               16K bits: 1 BRAM

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity font_rom is
   port(
      clk: in std_logic;
      addr: in std_logic_vector(10 downto 0);
      data: out std_logic_vector(7 downto 0)
   );
end font_rom;

architecture arch of font_rom is
   constant ADDR_WIDTH: integer:=11;
   constant DATA_WIDTH: integer:=8;
   signal addr_reg: std_logic_vector(ADDR_WIDTH-1 downto 0);
   type rom_type is array (0 to 2**ADDR_WIDTH-1)
        of std_logic_vector(DATA_WIDTH-1 downto 0);
   -- ROM definition
   constant ROM: rom_type:=(   -- 2^11-by-8
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00000000", -- 5
   "00000000", -- 6
   "00000000", -- 7
   "00000000", -- 8
   "00000000", -- 9
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x01
   "00000000", -- 0
   "00000000", -- 1
   "01111110", -- 2  ******
   "10000001", -- 3 *      *
   "10100101", -- 4 * *  * *
   "10000001", -- 5 *      *
   "10000001", -- 6 *      *
   "10111101", -- 7 * **** *
   "10011001", -- 8 *  **  *
   "10000001", -- 9 *      *
   "10000001", -- a *      *
   "01111110", -- b  ******
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x02
   "00000000", -- 0
   "00000000", -- 1
   "01111110", -- 2  ******
   "11111111", -- 3 ********
   "11011011", -- 4 ** ** **
   "11111111", -- 5 ********
   "11111111", -- 6 ********
   "11000011", -- 7 **    **
   "11100111", -- 8 ***  ***
   "11111111", -- 9 ********
   "11111111", -- a ********
   "01111110", -- b  ******
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x03
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "01101100", -- 4  ** **
   "11111110", -- 5 *******
   "11111110", -- 6 *******
   "11111110", -- 7 *******
   "11111110", -- 8 *******
   "01111100", -- 9  *****
   "00111000", -- a   ***
   "00010000", -- b    *
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x04
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00010000", -- 4    *
   "00111000", -- 5   ***
   "01111100", -- 6  *****
   "11111110", -- 7 *******
   "01111100", -- 8  *****
   "00111000", -- 9   ***
   "00010000", -- a    *
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x05
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00011000", -- 3    **
   "00111100", -- 4   ****
   "00111100", -- 5   ****
   "11100111", -- 6 ***  ***
   "11100111", -- 7 ***  ***
   "11100111", -- 8 ***  ***
   "00011000", -- 9    **
   "00011000", -- a    **
   "00111100", -- b   ****
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x06
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00011000", -- 3    **
   "00111100", -- 4   ****
   "01111110", -- 5  ******
   "11111111", -- 6 ********
   "11111111", -- 7 ********
   "01111110", -- 8  ******
   "00011000", -- 9    **
   "00011000", -- a    **
   "00111100", -- b   ****
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x07
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00000000", -- 5
   "00011000", -- 6    **
   "00111100", -- 7   ****
   "00111100", -- 8   ****
   "00011000", -- 9    **
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x08
   "11111111", -- 0 ********
   "11111111", -- 1 ********
   "11111111", -- 2 ********
   "11111111", -- 3 ********
   "11111111", -- 4 ********
   "11111111", -- 5 ********
   "11100111", -- 6 ***  ***
   "11000011", -- 7 **    **
   "11000011", -- 8 **    **
   "11100111", -- 9 ***  ***
   "11111111", -- a ********
   "11111111", -- b ********
   "11111111", -- c ********
   "11111111", -- d ********
   "11111111", -- e ********
   "11111111", -- f ********
   -- code x09
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00111100", -- 5   ****
   "01100110", -- 6  **  **
   "01000010", -- 7  *    *
   "01000010", -- 8  *    *
   "01100110", -- 9  **  **
   "00111100", -- a   ****
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x0a
   "11111111", -- 0 ********
   "11111111", -- 1 ********
   "11111111", -- 2 ********
   "11111111", -- 3 ********
   "11111111", -- 4 ********
   "11000011", -- 5 **    **
   "10011001", -- 6 *  **  *
   "10111101", -- 7 * **** *
   "10111101", -- 8 * **** *
   "10011001", -- 9 *  **  *
   "11000011", -- a **    **
   "11111111", -- b ********
   "11111111", -- c ********
   "11111111", -- d ********
   "11111111", -- e ********
   "11111111", -- f ********
   -- code x0b
   "00000000", -- 0
   "00000000", -- 1
   "00011110", -- 2    ****
   "00001110", -- 3     ***
   "00011010", -- 4    ** *
   "00110010", -- 5   **  *
   "01111000", -- 6  ****
   "11001100", -- 7 **  **
   "11001100", -- 8 **  **
   "11001100", -- 9 **  **
   "11001100", -- a **  **
   "01111000", -- b  ****
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x0c
   "00000000", -- 0
   "00000000", -- 1
   "00111100", -- 2   ****
   "01100110", -- 3  **  **
   "01100110", -- 4  **  **
   "01100110", -- 5  **  **
   "01100110", -- 6  **  **
   "00111100", -- 7   ****
   "00011000", -- 8    **
   "01111110", -- 9  ******
   "00011000", -- a    **
   "00011000", -- b    **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x0d
   "00000000", -- 0
   "00000000", -- 1
   "00111111", -- 2   ******
   "00110011", -- 3   **  **
   "00111111", -- 4   ******
   "00110000", -- 5   **
   "00110000", -- 6   **
   "00110000", -- 7   **
   "00110000", -- 8   **
   "01110000", -- 9  ***
   "11110000", -- a ****
   "11100000", -- b ***
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x0e
   "00000000", -- 0
   "00000000", -- 1
   "01111111", -- 2  *******
   "01100011", -- 3  **   **
   "01111111", -- 4  *******
   "01100011", -- 5  **   **
   "01100011", -- 6  **   **
   "01100011", -- 7  **   **
   "01100011", -- 8  **   **
   "01100111", -- 9  **  ***
   "11100111", -- a ***  ***
   "11100110", -- b ***  **
   "11000000", -- c **
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x0f
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00011000", -- 3    **
   "00011000", -- 4    **
   "11011011", -- 5 ** ** **
   "00111100", -- 6   ****
   "11100111", -- 7 ***  ***
   "00111100", -- 8   ****
   "11011011", -- 9 ** ** **
   "00011000", -- a    **
   "00011000", -- b    **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x10
   "00000000", -- 0
   "10000000", -- 1 *
   "11000000", -- 2 **
   "11100000", -- 3 ***
   "11110000", -- 4 ****
   "11111000", -- 5 *****
   "11111110", -- 6 *******
   "11111000", -- 7 *****
   "11110000", -- 8 ****
   "11100000", -- 9 ***
   "11000000", -- a **
   "10000000", -- b *
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x11
   "00000000", -- 0
   "00000010", -- 1       *
   "00000110", -- 2      **
   "00001110", -- 3     ***
   "00011110", -- 4    ****
   "00111110", -- 5   *****
   "11111110", -- 6 *******
   "00111110", -- 7   *****
   "00011110", -- 8    ****
   "00001110", -- 9     ***
   "00000110", -- a      **
   "00000010", -- b       *
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x12
   "00000000", -- 0
   "00000000", -- 1
   "00011000", -- 2    **
   "00111100", -- 3   ****
   "01111110", -- 4  ******
   "00011000", -- 5    **
   "00011000", -- 6    **
   "00011000", -- 7    **
   "01111110", -- 8  ******
   "00111100", -- 9   ****
   "00011000", -- a    **
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x13
   "00000000", -- 0
   "00000000", -- 1
   "01100110", -- 2  **  **
   "01100110", -- 3  **  **
   "01100110", -- 4  **  **
   "01100110", -- 5  **  **
   "01100110", -- 6  **  **
   "01100110", -- 7  **  **
   "01100110", -- 8  **  **
   "00000000", -- 9
   "01100110", -- a  **  **
   "01100110", -- b  **  **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x14
   "00000000", -- 0
   "00000000", -- 1
   "01111111", -- 2  *******
   "11011011", -- 3 ** ** **
   "11011011", -- 4 ** ** **
   "11011011", -- 5 ** ** **
   "01111011", -- 6  **** **
   "00011011", -- 7    ** **
   "00011011", -- 8    ** **
   "00011011", -- 9    ** **
   "00011011", -- a    ** **
   "00011011", -- b    ** **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x15
   "00000000", -- 0
   "01111100", -- 1  *****
   "11000110", -- 2 **   **
   "01100000", -- 3  **
   "00111000", -- 4   ***
   "01101100", -- 5  ** **
   "11000110", -- 6 **   **
   "11000110", -- 7 **   **
   "01101100", -- 8  ** **
   "00111000", -- 9   ***
   "00001100", -- a     **
   "11000110", -- b **   **
   "01111100", -- c  *****
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x16
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00000000", -- 5
   "00000000", -- 6
   "00000000", -- 7
   "11111110", -- 8 *******
   "11111110", -- 9 *******
   "11111110", -- a *******
   "11111110", -- b *******
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x17
   "00000000", -- 0
   "00000000", -- 1
   "00011000", -- 2    **
   "00111100", -- 3   ****
   "01111110", -- 4  ******
   "00011000", -- 5    **
   "00011000", -- 6    **
   "00011000", -- 7    **
   "01111110", -- 8  ******
   "00111100", -- 9   ****
   "00011000", -- a    **
   "01111110", -- b  ******
   "00110000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x18
   "00000000", -- 0
   "00000000", -- 1
   "00011000", -- 2    **
   "00111100", -- 3   ****
   "01111110", -- 4  ******
   "00011000", -- 5    **
   "00011000", -- 6    **
   "00011000", -- 7    **
   "00011000", -- 8    **
   "00011000", -- 9    **
   "00011000", -- a    **
   "00011000", -- b    **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x19
   "00000000", -- 0
   "00000000", -- 1
   "00011000", -- 2    **
   "00011000", -- 3    **
   "00011000", -- 4    **
   "00011000", -- 5    **
   "00011000", -- 6    **
   "00011000", -- 7    **
   "00011000", -- 8    **
   "01111110", -- 9  ******
   "00111100", -- a   ****
   "00011000", -- b    **
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1a
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00011000", -- 5    **
   "00001100", -- 6     **
   "11111110", -- 7 *******
   "00001100", -- 8     **
   "00011000", -- 9    **
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1b
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00110000", -- 5   **
   "01100000", -- 6  **
   "11111110", -- 7 *******
   "01100000", -- 8  **
   "00110000", -- 9   **
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1c
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00000000", -- 5
   "11000000", -- 6 **
   "11000000", -- 7 **
   "11000000", -- 8 **
   "11111110", -- 9 *******
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1d
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00000000", -- 4
   "00100100", -- 5   *  *
   "01100110", -- 6  **  **
   "11111111", -- 7 ********
   "01100110", -- 8  **  **
   "00100100", -- 9   *  *
   "00000000", -- a
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1e
   "00000000", -- 0
   "00000000", -- 1
   "00000000", -- 2
   "00000000", -- 3
   "00010000", -- 4    *
   "00111000", -- 5   ***
   "00111000", -- 6   ***
   "01111100", -- 7  *****
   "01111100", -- 8  *****
   "11111110", -- 9 *******
   "11111110", -- a *******
   "00000000", -- b
   "00000000", -- c
   "00000000", -- d
   "00000000", -- e
   "00000000", -- f
   -- code x1f