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-- A simple synthesized ROM, which reads from a binary file at synthesis time
-- single 32 bit read port.
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.rawfile_pack.all;
entity simple_rom32 is
generic (
-- 32-bit read port. ADDR_WIDTH is in bytes, not words.
ADDR_WIDTH : integer := 8 -- default 256 bytes
);
port (
raddr : in std_logic_vector(ADDR_WIDTH - 3 downto 0);
do : out std_logic_vector(31 downto 0));
end simple_rom32;
architecture behavioral of simple_rom32 is
constant NUM_WORDS : integer := 2**(ADDR_WIDTH - 2);
signal rom : rom32_t(0 to NUM_WORDS-1) := fread_elf("image.elf", NUM_WORDS);
begin
do <= rom(to_integer(unsigned(raddr)));
end behavioral;
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