From b41ff06dce8481e362eeec8c45aa6faefd72f77e Mon Sep 17 00:00:00 2001
From: ParkHyeon89 <parkhyeon0809@gmail.com>
Date: Thu, 7 Nov 2024 17:37:30 +0900
Subject: [PATCH] =?UTF-8?q?[3=EC=A3=BC=EC=B0=A8=20=EA=B3=BC=EC=A0=9C]=20St?=
 =?UTF-8?q?opWatch=20&=20FND?=
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---
 FND.v       |  20 +++++++++
 StopWatch.v | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 FND.v
 create mode 100644 StopWatch.v

diff --git a/FND.v b/FND.v
new file mode 100644
index 0000000..c9c4f0e
--- /dev/null
+++ b/FND.v
@@ -0,0 +1,20 @@
+module FND(i_Num, o_FND);
+  input [3:0] i_Num;
+  output reg [6:0] o_FND;
+ 
+  always@*
+    case(i_Num)
+      4'h0: o_FND = 7'b1000000;
+      4'h1: o_FND = 7'b1111001;
+      4'h2: o_FND = 7'b0100100;
+      4'h3: o_FND = 7'b0110000;
+      4'h4: o_FND = 7'b0011001;
+      4'h5: o_FND = 7'b0010010;
+      4'h6: o_FND = 7'b0000010;
+      4'h7: o_FND = 7'b1111000;
+      4'h8: o_FND = 7'b0000000;
+      4'h9: o_FND = 7'b0010000;
+      default: o_FND = 7'b1111111;
+  endcase
+ 
+endmodule
\ No newline at end of file
diff --git a/StopWatch.v b/StopWatch.v
new file mode 100644
index 0000000..fabaf58
--- /dev/null
+++ b/StopWatch.v
@@ -0,0 +1,116 @@
+module StopWatch(i_Clk, i_Rst, i_fStart, i_fStop,i_fRecord, 
+                 o_Sec0, o_Sec1, o_Sec2, 
+                 o_Sec3, o_Sec4, o_Sec5);
+    input i_Clk, i_Rst;
+    input i_fStart, i_fStop; //,i_fRecord;
+    output wire [6:0] o_Sec0, o_Sec1, o_Sec2, 
+                      o_Sec3, o_Sec4, o_Sec5;
+
+    reg [1:0] c_State, n_State;
+    
+    reg [3:0] c_Sec0, n_Sec0;
+    reg [3:0] c_Sec2, n_Sec2;
+    reg [3:0] c_Sec1, n_Sec1;
+    reg [3:0] c_Sec3; //, n_Sec3;
+    reg [3:0] c_Sec4; //, n_Sec4;
+    reg [3:0] c_Sec5; //, n_Sec5;
+        
+    reg [22:0] c_ClkCnt, n_ClkCnt;
+    reg c_fStart, n_fStart;
+    reg c_fStop, n_fStop;
+
+    wire fLstClk;
+    wire fLstSec0, fLstSec1, fLstSec2, 
+         fLstSec3, fLstSec4, fLstSec5;
+    wire fIncSec0, fIncSec1, fIncSec2;
+        //,fIncSec3, fIncSec4, fIncSec5;
+         
+    wire fStart, fStop; //?? ?? ??? ??//
+
+    parameter LST_CLK = 100_000_000/20 - 1;
+    parameter IDLE = 2'b00, WORK = 2'b01, 
+              PAUSE = 2'b10;, RECORD = 2'b11;//??? ????
+
+    FND FND0(c_Sec0, o_Sec0);
+    FND FND1(c_Sec1, o_Sec1);
+    FND FND2(c_Sec2, o_Sec2);
+    //???
+    FND FND3(c_Sec3, o_Sec3);
+    FND FND4(c_Sec4, o_Sec4);
+    FND FND5(c_Sec5, o_Sec5);
+    
+    always@(posedge i_Clk, negedge i_Rst) //??? ?? ? 0
+    
+        if(!i_Rst) begin
+            c_State = IDLE;
+            c_ClkCnt = 0;
+            c_Sec0 = 0;
+            c_Sec1 = 0;
+            c_Sec2 = 0; 
+            c_fStart = 1;
+            c_fStop = 1;
+        end else begin
+            c_State = n_State ;
+            c_ClkCnt = n_ClkCnt ;
+            c_Sec0 = n_Sec0 ;
+            c_Sec1 = n_Sec1 ;
+            c_Sec2 = n_Sec2 ;
+            c_fStart = n_fStart ;
+            c_fStop = n_fStop ;
+        end 
+        if(i_Record) begin
+            c_Sec3 = c_Sec0; 
+            c_Sec4 = c_Sec1;
+            c_Sec5 = c_Sec2;
+        end
+
+    assign fStart = !i_fStart && c_fStart,
+           fStop = !i_fStop && c_fStop;
+    assign fLstClk = c_ClkCnt == LST_CLK,
+           fLstSec0= c_Sec0 == 9,
+        fLstSec1= c_Sec1 == 9,
+        fLstSec2= c_Sec2 == 9;
+    
+    assign fIncSec0= fLstClk,
+        fIncSec1= fIncSec0 && fLstSec0,
+        fIncSec2= fIncSec1 && fLstSec1;
+//??
+    always@*
+        begin //?? ??? ?? ?? ?? ?  ?? ?? ???, ??? ????
+            n_fStart = i_fStart ;
+            n_fStop = i_fStop ;
+            n_State = c_State ;
+            n_ClkCnt = c_ClkCnt ;
+            n_Sec0 = c_Sec0 ;
+            n_Sec1 = c_Sec1 ;
+            n_Sec2 = c_Sec2 ;
+        
+        case(c_State)
+            IDLE: begin
+                n_ClkCnt = 0;
+                n_Sec0 = 0;
+                n_Sec1 = 0;
+                n_Sec2 = 0;
+                if(fStart) n_State = WORK;
+            end
+            WORK: begin
+                n_ClkCnt = fLstClk ? 0 : c_ClkCnt + 1;
+                n_Sec0 = fIncSec0 ? fLstSec0 ? 0 : c_Sec0 + 1 : c_Sec0;
+                n_Sec1 = fIncSec1 ? fLstSec1 ? 0 : c_Sec1 + 1 : c_Sec1;
+                n_Sec2 = fIncSec2 ? fLstSec2 ? 0 : c_Sec2 + 1 : c_Sec2;
+                if(fStop) n_State = IDLE;
+                else if(fStart)n_State = PAUSE;
+            end
+            PAUSE: begin
+                if(fStop) n_State = IDLE;
+                else if(fStart)n_State = WORK;
+            end
+            
+            RECORD:
+                if(fRecord) 
+                  n_Sec = 
+                  n_Sec = 
+                  n_Sec = 
+        endcase
+    end
+endmodule
\ No newline at end of file