Memoria32.sv

/*-----------------------------------------------------------------------------
-- Title		: Memória da CPU
-- Project		: CPU 
--------------------------------------------------------------------------------
-- File			: Memoria32.sv
-- Author		: Lucas Fernando da Silva Cambuim <lfsc@cin.ufpe.br>
-- Organization : Universidade Federal de Pernambuco
-- Created		: 20/09/2018
-- Last update	: 20/09/2018
-- Plataform	: DE2
-- Simulators	: ModelSim
-- Synthesizers	: 
-- Targets		: 
-- Dependency	: 
--------------------------------------------------------------------------------
-- Description	: Entidade responsável pela leitura e escrita em memória (dados de 32 bits).
--------------------------------------------------------------------------------
-- Copyright (c) notice
--		Universidade Federal de Pernambuco (UFPE).
--		CIn - Centro de Informatica.
--		Developed by computer science researchers.
--		This code may be used for educational and non-educational purposes as 
--		long as its copyright notice remains unchanged. 
------------------------------------------------------------------------------*/

module Memoria32 (
    input wire [31:0] raddress,
    input wire [31:0] waddress,
    input wire Clk,
    input wire [31:0] Datain,
    output wire [31:0] Dataout,
    input wire Wr
);

  wire [15:0] readUsefullAddress = raddress[15:0];

  wire [15:0] addS0 = readUsefullAddress + 0;
  wire [15:0] addS1 = readUsefullAddress + 1;
  wire [15:0] addS2 = readUsefullAddress + 2;
  wire [15:0] addS3 = readUsefullAddress + 3;

  wire [15:0] writeUsefullAddress = waddress[15:0];

  wire [15:0] waddS0 = writeUsefullAddress + 0;
  wire [15:0] waddS1 = writeUsefullAddress + 1;
  wire [15:0] waddS2 = writeUsefullAddress + 2;
  wire [15:0] waddS3 = writeUsefullAddress + 3;

  wire [7:0] inS0;
  wire [7:0] inS1;
  wire [7:0] inS2;
  wire [7:0] inS3;

  wire [7:0] outS0;
  wire [7:0] outS1;
  wire [7:0] outS2;
  wire [7:0] outS3;

  assign Dataout[31:24] = outS3;
  assign Dataout[23:16] = outS2;
  assign Dataout[15:8] = outS1;
  assign Dataout[7:0] = outS0;

  assign inS3 = Datain[31:24];
  assign inS2 = Datain[23:16];
  assign inS1 = Datain[15:8];
  assign inS0 = Datain[7:0];

  //Bancos de memórias (cada banco possui 65536 bytes)
  //0
  ramOnChip32 #(
      .ramSize(65536),
      .ramWide(8)
  ) memBlock0 (
      .clk(Clk),
      .data(inS0),
      .radd(addS0),
      .wadd(waddS0),
      .wren(Wr),
      .q(outS0)
  );
  //1
  ramOnChip32 #(
      .ramSize(65536),
      .ramWide(8)
  ) memBlock1 (
      .clk(Clk),
      .data(inS1),
      .radd(addS1),
      .wadd(waddS1),
      .wren(Wr),
      .q(outS1)
  );
  //2
  ramOnChip32 #(
      .ramSize(65536),
      .ramWide(8)
  ) memBlock2 (
      .clk(Clk),
      .data(inS2),
      .radd(addS2),
      .wadd(waddS2),
      .wren(Wr),
      .q(outS2)
  );
  //3
  ramOnChip32 #(
      .ramSize(65536),
      .ramWide(8)
  ) memBlock3 (
      .clk(Clk),
      .data(inS3),
      .radd(addS3),
      .wadd(waddS3),
      .wren(Wr),
      .q(outS3)
  );

endmodule