用Verilog设计一个表决器 要求: 实现参数化表决功能, 可配置为 3、 5、 7, 2K+1 人(人数<16)表决功能,多数人表决通过则通过;并且写出他的测试代码
时间: 2024-05-14 14:15:25 浏览: 81
以下是Verilog代码实现参数化表决器:
```
module voting(
input wire clk,
input wire rst,
input wire [15:0] voters,
output reg result
);
parameter WIDTH = 3; // 默认为3人表决
parameter THRESHOLD = (WIDTH+1)/2; // 多数人表决通过
reg [WIDTH-1:0] votes;
always @(posedge clk) begin
if (rst) begin
votes <= 0;
result <= 0;
end
else begin
for (int i=0; i<WIDTH; i=i+1) begin
if (voters[i]) begin
votes[i] <= 1;
end
else begin
votes[i] <= 0;
end
end
if (count(votes) >= THRESHOLD) begin
result <= 1;
end
else begin
result <= 0;
end
end
end
function integer count(input wire [WIDTH-1:0] bits);
integer cnt;
cnt = 0;
for (int i=0; i<WIDTH; i=i+1) begin
if (bits[i]) begin
cnt = cnt + 1;
end
end
count = cnt;
endfunction
endmodule
```
测试代码如下:
```
module voting_tb;
reg clk;
reg rst;
reg [15:0] voters;
wire result;
voting dut (
.clk(clk),
.rst(rst),
.voters(voters),
.result(result)
);
initial begin
clk = 0;
rst = 1;
voters = 16'b0000_0000_0000_0001;
#10 rst = 0;
end
always #5 clk = !clk;
initial begin
#100 voters = 16'b0000_0000_0000_0011;
#100 voters = 16'b0000_0000_0000_0111;
#100 voters = 16'b0000_0000_0000_1111;
#100 voters = 16'b0000_0000_0001_1111;
#100 voters = 16'b0000_0000_0011_1111;
#100 voters = 16'b0000_0000_1111_1111;
#100 voters = 16'b0000_0001_1111_1111;
#100 voters = 16'b0000_0011_1111_1111;
end
endmodule
```
在测试代码中,我们先将rst置为1,等待10个时钟周期后再将其置为0,表示复位结束。然后每100个时钟周期更改一次voters的值,以测试不同的表决结果。
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