regarding my prev post...............
i thought i'd start reading a .bin file into the BRAM first before trying for the bmp file
unfortunately the code is not responding:
entity files is
PORT(
clk_in :in std_logic;
output : out bit_vector(2 DOWNTO 0);
out1 : out std_logic_vector(6 DOWNTO 0);
we : in std_logic;
input : in std_logic_vector(3 DOWNTO 0);
rst: in std_logic);
end files;
architecture Behavioral of files is
type ramtype is array(0 to 7) of bit_vector(2 downto 0);
impure function file_io (inFile : in string) return ramtype is
file Prog: text is in inFile;
variable L: line;
variable VALUE : bit_vector(2 DOWNTO 0);
variable RAM1 :ramtype;
begin
for I in ramtype'range loop
if NOT endfile(Prog) then
readline (Prog, L);
read (L, RAM1(I));
end if;
end loop;
return RAM1;
end function;
signal in_data : bit_vector(2 DOWNTO 0);
signal RAM : ramtype := file_io("demo.bin");
signal address : std_logic_vector(3 DOWNTO 0);
begin
process (clk_in) IS
begin
if clk_in'EVENT and clk_in ='1' then
if (we = '0') then
RAM(conv_integer(input)) <= in_data;
output <= in_data;
else
output<=RAM(conv_integer(input));
end if;
end if;
CASE input IS
WHEN "0000"=>out1<="1000000";
WHEN "0001"=>out1<="1111001";
WHEN "0010"=>out1<="0100100";
WHEN "0011"=>out1<="0110000";
WHEN "0100"=>out1<="0011001";
WHEN "0101"=>out1<="0010010";
WHEN "0110"=>out1<="0000010";
WHEN "0111"=>out1<="1111000";
WHEN "1000"=>out1<="0000000";
WHEN "1001"=>out1<="0010000";
WHEN OTHERS=>NULL;
END CASE;
end process;
end Behavioral;
The in_data seems to be redundant and confusing , but if i dont assign the ram to an unassigned signal ie when we ='0' then the RAM is instantiated as distributed instead of BLOCK
The bin file is just :
demo.bin
000001010011100101110111
( 0 to 7 in 3 bit)
can anyone help me with this file_io problem...
?
or is ther something fundamentally wrong with this approach
Honored Contributor
