package_microassemblycode.vhd

&#65279 The purpose of this lab is to introduce the concept of FSMs with a datapath, and to stud

USE WORK.ALL;

LIBRARY IEEE;
USE IEEE.std_logic_1164.all;

PACKAGE package_MicroAssemblyCode IS

  CONSTANT Size : INTEGER := 8;
  CONSTANT ASize : INTEGER := 3;

  SUBTYPE OpCode_Type IS STD_LOGIC_VECTOR(2 DOWNTO 0);
  SUBTYPE Regs_Type   IS STD_LOGIC_VECTOR(ASize DOWNTO 0);

  CONSTANT OpX   : OpCode_Type := "001"; -- "Empty" operator

  CONSTANT OpInv : OpCode_Type := "000"; -- Complement A
  CONSTANT OpAnd : OpCode_Type := "001"; -- A and B
  CONSTANT OpXor : OpCode_Type := "010"; -- A xor B
  CONSTANT OpOr  : OpCode_Type := "011"; -- A or B
  CONSTANT OpDec : OpCode_Type := "100"; -- Decrement A 
  CONSTANT OpAdd : OpCode_Type := "101"; -- A add B
  CONSTANT OpSub : OpCode_Type := "110"; -- A sub B
  CONSTANT OpInc : OpCode_Type := "111"; -- Increment A

-- shift instructions

  CONSTANT OpPass   : OpCode_Type := "000";
  CONSTANT OpShiftL : OpCode_Type := "100";
  CONSTANT OpShiftR : OpCode_Type := "110";
  CONSTANT OpRotL   : OpCode_Type := "101";
  CONSTANT OpRotR   : OpCode_Type := "111";

-- register macros

  CONSTANT Rx : Regs_Type :=  "0000";
  CONSTANT R0 : Regs_Type :=  "0001";
  CONSTANT R1 : Regs_Type :=  "0011";
  CONSTANT R2 : Regs_Type :=  "0101";
  CONSTANT R3 : Regs_Type :=  "0111";
  CONSTANT R4 : Regs_Type :=  "1001";
  CONSTANT R5 : Regs_Type :=  "1011";
  CONSTANT R6 : Regs_Type :=  "1101";
  CONSTANT R7 : Regs_Type :=  "1111";

  TYPE Instruction_Type IS RECORD
    IE    : STD_LOGIC;
    Dest  : Regs_Type;
    Src1  : Regs_Type;
    Src2  : Regs_Type;
    Alu   : OpCode_Type;
    Shift : OpCode_Type;
    OE    : STD_LOGIC;
  END RECORD;

  TYPE Program_Type IS ARRAY(NATURAL RANGE <>) OF Instruction_Type;

  TYPE RGBData_Type IS ARRAY(NATURAL RANGE <>) OF STD_LOGIC_VECTOR(Size*3-1 DOWNTO 0);

  CONSTANT RGBDataIn : RGBData_Type := (
    ("010000001000000010101110"),
    ("001000001100000000101110"),
    ("011010001010000010101010")
  );

END package_MicroAssemblyCode;