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[/] [versatile_counter/] [tags/] [rev1/] [rtl/] [verilog/] [versatile_counter.v] - Blame information for rev 2

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`include "versatile_counter_defines.v"
`define LFSR_LENGTH `CNT_LENGTH
`include "lfsr_polynom.v"
`let CNT_INDEX=CNT_LENGTH-1
module `CNT_MODULE_NAME
  (
`ifdef CNT_TYPE_GRAY
   output reg [`CNT_LENGTH:1] q,
`else
 `ifdef CNT_Q
    output [`CNT_LENGTH:1]    q,
 `endif
`endif
`ifdef CNT_CLEAR
    input clear,
`endif
`ifdef CNT_SET
    input set,
`endif
`ifdef CNT_REW
    input rew,
`endif
`ifdef CNT_CE
    input cke,
`endif
`ifdef CNT_QNEXT
    output [`CNT_LENGTH:1] q_next,
`endif
`ifdef CNT_Z
    output z,
`endif
`ifdef CNT_ZQ
    output reg zq,
`endif
    input clk,
    input rst
   );
 
`ifdef CNT_SET
   parameter set_value = `CNT_SET_VALUE;
`endif
`ifdef CNT_WRAP
   parameter wrap_value = `CNT_WRAP_VALUE;
`endif
 
   // internal q reg
   reg [`CNT_LENGTH:1] qi;
 
`ifndef CNT_QNEXT
   wire [`CNT_LENGTH:1] q_next;
`endif
`ifdef CNT_REW
   wire [`CNT_LENGTH:1] q_next_fw;
   wire [`CNT_LENGTH:1] q_next_rew;
`endif
 
`ifndef CNT_REW
   assign q_next =
`else
     assign q_next_fw =
`endif
`ifdef CNT_CLEAR
       clear ? `CNT_LENGTH'd0 :
`endif
`ifdef CNT_SET
         set ? set_value :
`endif
`ifdef CNT_WRAP
           (qi == wrap_value) ? `CNT_LENGTH'd0 :
`endif
`ifdef CNT_TYPE_LFSR
             {qi[`CNT_INDEX:1],~(`LFSR_FB)};
`else
   qi + `CNT_LENGTH'd1;
`endif
 
`ifdef CNT_REW
   assign q_next_rew =
 `ifdef CNT_CLEAR
     clear ? `CNT_LENGTH'd0 :
 `endif
 `ifdef CNT_SET
       set ? set_value :
 `endif
 `ifdef CNT_WRAP
         (qi == `CNT_LENGTH'd0) ? wrap_value :
 `endif
 `ifdef CNT_TYPE_LFSR
           {~(`LFSR_FB_REW),qi[`CNT_LENGTH:2]};
 `else
   qi - `CNT_LENGTH'd1;
 `endif
`endif
 
`ifdef CNT_REW
   assign q_next = rew ? q_next_rew : q_next_fw;
`endif
 
   always @ (posedge clk or posedge rst)
     if (rst)
       qi <= `CNT_LENGTH'd0;
     else
`ifdef CNT_CE
   if (cke)
`endif
     qi <= q_next;
 
`ifdef CNT_Q
 `ifdef CNT_TYPE_GRAY
   always @ (posedge clk or posedge rst)
     if (rst)
       q <= `CNT_LENGTH'd0;
     else
  `ifdef CNT_CE
       if (cke)
  `endif
         q <= (q_next>>1) ^ q_next;
 `else
   assign q = q_next;
 `endif
`endif
 
`ifdef CNT_Z
   assign z = (q == `CNT_LENGTH'd0);
`endif
 
`ifdef CNT_ZQ
   always @ (posedge clk or posedge rst)
     if (rst)
       zq <= 1'b0;
     else
 `ifdef CNT_CE
       if (cke)
 `endif
         zq <= q_next == `CNT_LENGTH'd0;
`endif
endmodule

Line No.	Rev	Author	Line
1	2	unneback	`include "versatile_counter_defines.v"
2			`define LFSR_LENGTH `CNT_LENGTH
3			`include "lfsr_polynom.v"
4			`let CNT_INDEX=CNT_LENGTH-1
5			module `CNT_MODULE_NAME
6			`(`
7			`ifdef CNT_TYPE_GRAY
8			output reg [`CNT_LENGTH:1] q,
9			`else
10			`ifdef CNT_Q
11			output [`CNT_LENGTH:1] q,
12			`endif
13			`endif
14			`ifdef CNT_CLEAR
15			`input clear,`
16			`endif
17			`ifdef CNT_SET
18			`input set,`
19			`endif
20			`ifdef CNT_REW
21			`input rew,`
22			`endif
23			`ifdef CNT_CE
24			`input cke,`
25			`endif
26			`ifdef CNT_QNEXT
27			output [`CNT_LENGTH:1] q_next,
28			`endif
29			`ifdef CNT_Z
30			`output z,`
31			`endif
32			`ifdef CNT_ZQ
33			`output reg zq,`
34			`endif
35			`input clk,`
36			`input rst`
37			`);`
38
39			`ifdef CNT_SET
40			parameter set_value = `CNT_SET_VALUE;
41			`endif
42			`ifdef CNT_WRAP
43			parameter wrap_value = `CNT_WRAP_VALUE;
44			`endif
45
46			`// internal q reg`
47			reg [`CNT_LENGTH:1] qi;
48
49			`ifndef CNT_QNEXT
50			wire [`CNT_LENGTH:1] q_next;
51			`endif
52			`ifdef CNT_REW
53			wire [`CNT_LENGTH:1] q_next_fw;
54			wire [`CNT_LENGTH:1] q_next_rew;
55			`endif
56
57			`ifndef CNT_REW
58			`assign q_next =`
59			`else
60			`assign q_next_fw =`
61			`endif
62			`ifdef CNT_CLEAR
63			clear ? `CNT_LENGTH'd0 :
64			`endif
65			`ifdef CNT_SET
66			`set ? set_value :`
67			`endif
68			`ifdef CNT_WRAP
69			(qi == wrap_value) ? `CNT_LENGTH'd0 :
70			`endif
71			`ifdef CNT_TYPE_LFSR
72			{qi[`CNT_INDEX:1],~(`LFSR_FB)};
73			`else
74			qi + `CNT_LENGTH'd1;
75			`endif
76
77			`ifdef CNT_REW
78			`assign q_next_rew =`
79			`ifdef CNT_CLEAR
80			clear ? `CNT_LENGTH'd0 :
81			`endif
82			`ifdef CNT_SET
83			`set ? set_value :`
84			`endif
85			`ifdef CNT_WRAP
86			(qi == `CNT_LENGTH'd0) ? wrap_value :
87			`endif
88			`ifdef CNT_TYPE_LFSR
89			{~(`LFSR_FB_REW),qi[`CNT_LENGTH:2]};
90			`else
91			qi - `CNT_LENGTH'd1;
92			`endif
93			`endif
94
95			`ifdef CNT_REW
96			`assign q_next = rew ? q_next_rew : q_next_fw;`
97			`endif
98
99			`always @ (posedge clk or posedge rst)`
100			`if (rst)`
101			qi <= `CNT_LENGTH'd0;
102			`else`
103			`ifdef CNT_CE
104			`if (cke)`
105			`endif
106			`qi <= q_next;`
107
108			`ifdef CNT_Q
109			`ifdef CNT_TYPE_GRAY
110			`always @ (posedge clk or posedge rst)`
111			`if (rst)`
112			q <= `CNT_LENGTH'd0;
113			`else`
114			`ifdef CNT_CE
115			`if (cke)`
116			`endif
117			`q <= (q_next>>1) ^ q_next;`
118			`else
119			`assign q = q_next;`
120			`endif
121			`endif
122
123			`ifdef CNT_Z
124			assign z = (q == `CNT_LENGTH'd0);
125			`endif
126
127			`ifdef CNT_ZQ
128			`always @ (posedge clk or posedge rst)`
129			`if (rst)`
130			`zq <= 1'b0;`
131			`else`
132			`ifdef CNT_CE
133			`if (cke)`
134			`endif
135			zq <= q_next == `CNT_LENGTH'd0;
136			`endif
137			`endmodule`

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[/] [versatile_counter/] [tags/] [rev1/] [rtl/] [verilog/] [versatile_counter.v] - Blame information for rev 2