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发表于 2011-8-16 20:46:01
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显示全部楼层
01.module div3
02.( input clk,
03.input rst_n,
04.input [7:0] data,
05.output reg flag
06.);
07.
08.reg [3:0] sum;
09.
10.integer i;
11.
12.always @ *
13.begin
14.sum = 0;
15.for (i=0;i<8;i=i+1)
16.begin
17.if (i==0 || i==2 || i==4 || i==6 )
18.sum = (data[i]) ? sum + 1 : sum;
19.else
20.sum = (data[i]) ? sum + 2 : sum;
21.end
22.end
23.
24.always @ (posedge clk, negedge rst_n)
25.begin
26.if (!rst_n)
27.flag <= 1'b0;
28.else if (sum ==0 || sum ==3 || sum==6 || sum==9 || sum==12)
29.flag <= 1'b1;
30.else
31.flag <= 1'b0;
32.end
33.
34.endmodule; |
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