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[/] [eco32/] [trunk/] [fpga/] [mc/] [boards/] [s3e-500/] [src/] [bio/] [bio.v] - Diff between revs 288 and 290

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//
//
// bio.v -- board specific I/O
// bio.v -- board specific I/O
//
//
 
 
 
 
module bio(clk, reset,
`timescale 1ns/10ps
           en, wr, addr,
`default_nettype none
 
 
 
 
 
module bio(clk, rst,
 
           stb, we, addr,
           data_in, data_out,
           data_in, data_out,
           wt, spi_en,
           ack, spi_en,
           sw, led,
           sw, led,
           lcd_e, lcd_rw, lcd_rs,
           lcd_e, lcd_rw, lcd_rs,
           spi_ss_b, fpga_init_b);
           spi_ss_b, fpga_init_b);
    // internal interface
    // internal interface
    input clk;
    input clk;
    input reset;
    input rst;
    input en;
    input stb;
    input wr;
    input we;
    input addr;
    input addr;
    input [31:0] data_in;
    input [31:0] data_in;
    output [31:0] data_out;
    output [31:0] data_out;
    output wt;
    output ack;
    output spi_en;
    output spi_en;
    // external interface
    // external interface
    input [3:0] sw;
    input [3:0] sw;
    output [7:0] led;
    output [7:0] led;
    output lcd_e;
    output lcd_e;
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  reg [3:0] sw_p;
  reg [3:0] sw_p;
  reg [3:0] sw_s;
  reg [3:0] sw_s;
 
 
  always @(posedge clk) begin
  always @(posedge clk) begin
    if (reset) begin
    if (rst) begin
      bio_out[31:0] <= 32'h0;
      bio_out[31:0] <= 32'h0;
    end else begin
    end else begin
      if (en & wr & ~addr) begin
      if (stb & we & ~addr) begin
        bio_out[31:0] <= data_in[31:0];
        bio_out[31:0] <= data_in[31:0];
      end
      end
    end
    end
  end
  end
 
 
  assign data_out[31:0] =
  assign data_out[31:0] =
    (addr == 0) ? bio_out[31:0] : bio_in[31:0];
    (addr == 0) ? bio_out[31:0] : bio_in[31:0];
  assign wt = 0;
  assign ack = stb;
  assign spi_en = bio_out[31];
  assign spi_en = bio_out[31];
 
 
  always @(posedge clk) begin
  always @(posedge clk) begin
    sw_p[3:0] <= sw[3:0];
    sw_p[3:0] <= sw[3:0];
    sw_s[3:0] <= sw_p[3:0];
    sw_s[3:0] <= sw_p[3:0];

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