请给出实现一下逻辑的verilog代码:输入信号通过温度计码产生逻辑产生了8位的温度计码,经过8-3编码器生成3位的二进制码,在经过模8加法器生成三位的二进制指针,该指针通过寄存器寄存,由指针和输入的温度计码共同决定DWA算法的输出,通过输出码来决定选取的DAC单位元件,并给出另一段针对上述代码的可以使用vivado进行测试和仿真的的testbetch代码
时间: 2024-03-02 20:53:06 浏览: 102
Verilog实现基于cordic算法计算蝶形运行结构实现FFT,vivado平台开发,包含测试testbench-源码
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以下是实现上述逻辑的Verilog代码:
```verilog
module DWA(
input [7:0] temp_code,
input clk,
input rst,
output reg [2:0] dac_sel
);
reg [2:0] pointer;
reg [2:0] enc;
wire [2:0] enc_out;
// 8-3编码器
encoder_8_3 enc_8_3(
.in(temp_code),
.out(enc_out)
);
// 模8加法器
always @(posedge clk) begin
if (rst) pointer <= 0;
else pointer <= (pointer + enc_out) % 8;
end
// DWA算法
always @(posedge clk) begin
case ({enc_out, pointer})
3'b000: dac_sel <= 3'b000;
3'b001: dac_sel <= 3'b001;
3'b010: dac_sel <= 3'b010;
3'b011: dac_sel <= 3'b011;
3'b100: dac_sel <= 3'b100;
3'b101: dac_sel <= 3'b101;
3'b110: dac_sel <= 3'b110;
3'b111: dac_sel <= 3'b111;
default: dac_sel <= 3'b000;
endcase
end
// 温度计编码器
always @(*) begin
case (temp_code)
8'b00000000: enc = 3'b000;
8'b00001111: enc = 3'b001;
8'b00011111: enc = 3'b010;
8'b00111111: enc = 3'b011;
8'b01111111: enc = 3'b100;
8'b11111111: enc = 3'b101;
default: enc = 3'b000;
endcase
end
endmodule
```
以下是可以使用Vivado进行测试和仿真的testbench代码:
```verilog
module DWA_tb;
reg [7:0] temp_code;
reg clk, rst;
wire [2:0] dac_sel;
DWA dut(
.temp_code(temp_code),
.clk(clk),
.rst(rst),
.dac_sel(dac_sel)
);
always #5 clk = ~clk;
initial begin
clk = 0;
rst = 1;
temp_code = 8'b00000000;
#20 rst = 0;
end
always @(posedge clk) begin
if ($time > 100 && $time <= 200) temp_code = 8'b00000001;
if ($time > 200 && $time <= 300) temp_code = 8'b00000011;
if ($time > 300 && $time <= 400) temp_code = 8'b00000111;
if ($time > 400 && $time <= 500) temp_code = 8'b00001111;
if ($time > 500 && $time <= 600) temp_code = 8'b00011111;
if ($time > 600 && $time <= 700) temp_code = 8'b00111111;
if ($time > 700 && $time <= 800) temp_code = 8'b01111111;
if ($time > 800 && $time <= 900) temp_code = 8'b11111111;
end
endmodule
```
该testbench代码会在时钟的上升沿时依次输入不同的温度计码,然后观察输出的DAC选取结果。可以通过观察仿真波形来验证DWA算法的正确性。
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