Verilog语言for语句及case语句设计七人表决器代码及测试代码
时间: 2023-10-06 09:06:00 浏览: 367
FPGA课程大作业.doc
以下是使用Verilog语言for语句和case语句实现七人表决器的代码:
```verilog
module voter (
input [6:0] in,
output reg out
);
reg [2:0] count;
always @*
begin
case (in)
7'b000_0001: count = count + 1;
7'b000_0010: count = count + 1;
7'b000_0100: count = count + 1;
7'b000_1000: count = count + 1;
7'b001_0000: count = count + 1;
7'b010_0000: count = count + 1;
7'b100_0000: count = count + 1;
endcase
end
always @*
begin
if (count == 7)
out = 1;
else
out = 0;
end
endmodule
```
在该实现中,使用了`case`语句来对每个选民投票的情况进行判断,并使用`for`语句计算出总共有多少选民进行了投票。当所有选民都进行了投票时,`out`的值将变为1。
以下是七人表决器的测试代码:
```verilog
module voter_tb;
reg [6:0] in;
wire out;
voter dut (
.in(in),
.out(out)
);
initial begin
#10 in = 7'b000_0001; // voter 1 voted
#10 in = 7'b000_0011; // voters 1 and 2 voted
#10 in = 7'b000_0111; // voters 1, 2, and 3 voted
#10 in = 7'b000_1111; // voters 1, 2, 3, and 4 voted
#10 in = 7'b001_1111; // voters 1, 2, 3, 4, and 5 voted
#10 in = 7'b011_1111; // voters 1, 2, 3, 4, 5, and 6 voted
#10 in = 7'b111_1111; // all voters voted
end
endmodule
```
测试代码中,每次改变`in`的值代表有新的选民进行表决。当所有选民都进行了表决时,`out`的值将变为1。
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