继续,转成Verilog语言
时间: 2023-08-16 13:07:23 浏览: 57
好的,下面是将上述M语言代码转换为Verilog的示例:
```verilog
module fft (
input [1:0] clk,
input [7:0] in_real,
input [7:0] in_imag,
output [7:0] out_real,
output [7:0] out_imag
);
parameter N = 8;
reg signed [7:0] real [0:N-1];
reg signed [7:0] imag [0:N-1];
wire signed [7:0] W_real [0:N/2-1];
wire signed [7:0] W_imag [0:N/2-1];
integer k;
// Generate twiddle factor coefficients
generate
for (k = 0; k < N/2; k = k + 1) begin : twiddle_factors
assign W_real[k] = $signed($cos(2 * $pi * k / N));
assign W_imag[k] = -$signed($sin(2 * $pi * k / N));
end
endgenerate
// Butterfly computation
generate
for (k = 0; k < N/2; k = k + 1) begin : butterfly
assign real[k] = in_real + in_real;
assign imag[k] = in_imag + in_imag;
end
endgenerate
always @(posedge clk) begin
integer stage;
integer group;
integer index;
for (stage = 0; stage < $clog2(N); stage = stage + 1) begin
for (group = 0; group < N / (2 << stage); group = group + 1) begin
for (index = 0; index < N >> (stage + 1); index = index + 1) begin
integer index1 = (group * (2 << stage)) + index;
integer index2 = index1 + (1 << stage);
integer twiddle_index = (index << stage) % (N >> stage);
reg signed [7:0] temp_real;
reg signed [7:0] temp_imag;
assign temp_real = real[index2] * W_real[twiddle_index] - imag[index2] * W_imag[twiddle_index];
assign temp_imag = real[index2] * W_imag[twiddle_index] + imag[index2] * W_real[twiddle_index];
assign real[index2] = real[index1] - temp_real;
assign imag[index2] = imag[index1] - temp_imag;
assign real[index1] = real[index1] + temp_real;
assign imag[index1] = imag[index1] + temp_imag;
end
end
end
assign out_real = real;
assign out_imag = imag;
end
endmodule
```
上述Verilog代码实现了一个8点FFT模块。它包含了输入、输出端口以及内部的寄存器和线路。
要将M语言代码转换为Verilog,你需要根据硬件描述语言的语法和约束进行适当的转换。在这个示例中,我们使用了Verilog的生成块(generate block)来生成Twiddle Factor系数,并使用循环来实现蝶形计算。
请注意,这只是一个简单的示例,实际的FFT实现可能会更加复杂。如果你有特定的需求或更多疑问,请提供更多细节,我将尽力提供帮助。