/* 
(C) OOMusou 2008 http://oomusou.cnblogs.com

Filename    : digi_clock.v
Compiler    : Quartus II 7.2 SP3 + ModelSim-Altera 6.1g
Description : Demo how to write digital clock top module
Release     : 07/27/2008 1.0
*/

module digi_clock (
  input         CLOCK_50,
  input  [17:0] SW,
  input  [3:0]  KEY,
  output [6:0]  HEX2,
  output [6:0]  HEX3,
  output [6:0]  HEX4,
  output [6:0]  HEX5,
  output [6:0]  HEX6,
  output [6:0]  HEX7
);

wire       clk_1;
wire [3:0] w_sq0;
wire [2:0] w_sq1;
wire [3:0] w_mq0;
wire [2:0] w_mq1;
wire [3:0] w_hq0;
wire [2:0] w_hq1;

// 1Hz clock
divn # (.WIDTH(26), .N(50000000)) 
u0 (
  .clk(CLOCK_50),
  .rst_n(KEY[0]),
  .o_clk(clk_1)
);

clock u1 (
  .clk(clk_1),
  .en(SW[17]),     // input  enable
  .clr(SW[16]),    // input  clear
  .load(SW[15]),   // input  load
  .sd0(4'h0),      // input  second digit 0
  .sd1(3'h0),      // input  second digit 1
  .md0(SW[3:0]),   // input  minute digit 0
  .md1(SW[6:4]),   // input  minute digit 1
  .hd0(SW[10:7]),  // input  hour digit   0
  .hd1(SW[13:11]), // input  hour digit   1
  .sq0(w_sq0),     // output second digit 0
  .sq1(w_sq1),     // output second digit 1 
  .mq0(w_mq0),     // output minute digit 0
  .mq1(w_mq1),     // output minute digit 1
  .hq0(w_hq0),     // output minute digit 0
  .hq1(w_hq1)      // output minute digit 1
);

// sec. dig0 to seg7
seg7_lut u2 (
  .i_dig(w_sq0),
  .o_seg(HEX2)
);

// sec. dig1 to seg7
seg7_lut u3 (
  .i_dig({1'b0, w_sq1}),
  .o_seg(HEX3)
);

// min. dig0 to seg7
seg7_lut u4 (
  .i_dig(w_mq0),
  .o_seg(HEX4)
);

// min. dig1 to seg7
seg7_lut u5 (
  .i_dig({1'b0, w_mq1}),
  .o_seg(HEX5)
);

// hour dig0 to seg7
seg7_lut u6 (
  .i_dig(w_hq0),
  .o_seg(HEX6)
);

// hour dig1 to seg7
seg7_lut u7 (
  .i_dig({1'b0, w_hq1}),
  .o_seg(HEX7)
);

endmodule