rom.vhd

通过VHDL写的128*32液晶驱动接口。

LIBRARY ieee;
USE ieee.std_logic_1164.ALL;

PACKAGE rom IS
   CONSTANT rom_width: NATURAL :=8;
   CONSTANT rom_length: NATURAL :=256;
   SUBTYPE  rom_word IS STD_LOGIC_VECTOR(rom_width-1 DOWNTO 0);
   TYPE rom_table IS ARRAY ( 0 To rom_length-1) of rom_word;
   CONSTANT rom: rom_table := rom_table '(
            "11110000","00000001","00000000","00010001",
            "00010001","11110000","00000010","00000000",
            "00011110","00001001","11110000","00000011",
            "00000000","00100000","01001101","11110000",
            "00000100","00000000","00011001","00000100",
            "11110000","00000101","00000000","00010101",
            "01001111","11110000","00000110","00000000",
            "00101010","00000010","11110000","00000001",
            "00000001","00011111","00100110","11110000",
            "00000010","00000001","00011100","00011100",
            "11110000","00000011","00000001","00110011",
            "00110000","11110000","00000100","00000001",
            "00101111","00111110","11110000","00000101",
            "00000001","00011001","00001011","11110000",
            "00000110","00000001","00101011","00011110",
            "11110001","00000000","00001000","01000101",
            "11110001","00000001","00001000","01000100",
            "11110001","00000010","00001000","01000001",
            "11110001","00000011","00001000","00101101",
            "11110001","00000100","00001000","00101101",
            "11110001","00000101","00001000","01010110",
            "11110000","00000011","00000000","00110000",
            "00101101","11110000","00000100","00000000",
            "00101010","00010101","11110000","00000101",
            "00000000","00110001","01001001","11110000",
            "00000110","00000000","00101111","00010101",
            "11110000","00000111","00000000","00101101",
            "00010011","11110001","00000000","00011000",
            "01010100","11110001","00000001","00011000",
            "01100101","11110001","00000010","00011000",
            "01100011","11110001","00000011","00011000",
            "01101000","11110001","00000100","00011000",
            "01110011","11110001","00000101","00011000",
            "01101000","11110001","00000110","00011000",
            "01101001","11110001","00000111","00011000",
            "01101110","11110001","00001000","00011000",
            "01100101","11110001","00001010","00011000",
            "01000011","11110001","00001011","00011000",
            "01101111","11110001","00001100","00011000",
            "00101110","11110001","00001101","00011000",
            "01001100","11110001","00001110","00011000",
            "01010100","11110001","00001111","00011000",
            "01000100","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000",
            "00000000","00000000","00000000","00000000");
END rom;