au_top.luc

module au_top (
    input clk,              // 100MHz clock
    input rst_n,            // reset button (active low)
    output led [8],         // 8 user controllable LEDs
    input usb_rx,           // USB->Serial input
    output usb_tx,          // USB->Serial output
    output io_led [3][8],   // LEDs on IO Shield
    output io_seg [8],      // 7-segment LEDs on IO Shield (ANODE)
    output io_sel [4],      // Digit select on IO Shield
    //output sev_seg[7],
    //output sev_seg_digit[4],
    input io_button [5],    // 5 buttons on IO Shield
    input io_dip [3][8]     // DIP switches on IO Shield
  ) {
  
  sig rst;
  control control_unit(.clk(clk), .rst(rst));
  datapath datapath_unit(.clk(clk), .rst(rst));
  multi_seven_seg seg(.clk(clk), .rst(rst));
  
  .clk(clk) {
    // The reset conditioner is used to synchronize the reset signal to the FPGA
    // clock. This ensures the entire FPGA comes out of reset at the same time.
    reset_conditioner reset_cond;
    button_conditioner button_conditioner[7];
    edge_detector edge_detector[7](#RISE(1), #FALL(0));
  }
  
  always {
  
    reset_cond.in = ~rst_n;   // input raw inverted reset signal
    rst = reset_cond.out;     // conditioned reset
    button_conditioner.in = c{io_dip[2][7], io_dip[0][0], io_button};
    edge_detector.in = button_conditioner.out;
    
    led = 8b0; 
    usb_tx = usb_rx;
    io_sel = 4h0;
    io_seg = 8hF;
    
    
    datapath_unit.alufn = control_unit.alufn;
    datapath_unit.we = control_unit.we;
    datapath_unit.asel = control_unit.asel;
    datapath_unit.bsel = control_unit.bsel;
    datapath_unit.wdsel = control_unit.wdsel;
    datapath_unit.ra_address = control_unit.ra_address;
    datapath_unit.rb_address = control_unit.rb_address;
    datapath_unit.write_address = control_unit.write_address;
    datapath_unit.random_value = control_unit.random_value;
    datapath_unit.current_button_press = control_unit.current_button_press;
    control_unit.rb_data = datapath_unit.rb_data;

    control_unit.start_button_press = edge_detector.out[6]; // io_dip[2][7] flick up to START
    control_unit.p1_buttons_press = c{edge_detector.out[2], edge_detector.out[1], edge_detector.out[0]}; // io_button[0], [1], [2] for p1
    control_unit.p1_buttons_press_only_one_button = (edge_detector.out[0] ^ ~edge_detector.out[1] ^ ~edge_detector.out[2]) | (~edge_detector.out[0] ^ edge_detector.out[1] ^ ~edge_detector.out[2])  | (~edge_detector.out[0] ^ ~edge_detector.out[1] ^ edge_detector.out[2]) ;
    control_unit.p2_buttons_press = c{edge_detector.out[5], edge_detector.out[4], edge_detector.out[3]};
    control_unit.p2_buttons_press_only_one_button = (edge_detector.out[4] ^ ~edge_detector.out[3] ^ ~edge_detector.out[5]) | (~edge_detector.out[4] ^ edge_detector.out[3] ^ ~edge_detector.out[5]) | (~edge_detector.out[4] ^ ~edge_detector.out[3] ^ edge_detector.out[5]);
    
    // use io_led[2] for LED 
    io_led[2] = datapath_unit.led_state;
    
    // use io_led[0] for p1 score 
    io_led[0] = datapath_unit.p1_score;
    seg.values = {4b0, datapath_unit.p1_score[3:0], 4b0, datapath_unit.p2_score[3:0]};
    //seg.values = {8, 8, 8, 8};
    // use io_led[1] for p2 score 
    io_led[1] = datapath_unit.p2_score;
    
    io_seg = ~seg.seg;
    io_sel = ~seg.sel;
    
    //player 1 
    

   
  }
}