Digit Reverse Order issue for INTEL FFT IP core

Hi Chee pin,

thanks for your effort.

I am not quite understand it.

Can you suggest how can I turn the digit reversed result back into natural order output using my 8 bits index? because I plan to turn result into natural order result in FPGA and forward it to next stream for further usage.

my current logic is

assign digi_reverse_index[fft_result_address_width-1:0] ={result_index[0], result_index[1], result_index[2], result_index[3],
result_index[4], result_index[5], result_index[6], result_index[7]};

integer i;
always @(posedge clk or negedge reset_n)
begin
if(!reset_n)
begin
for (i = 0; i < data_num-1; i = i + 1) begin
fft_digireverse_result_r[i] <= 32'd0;
fft_digireverse_result_i[i] <= 32'd0;
end
end
else if(source_valid) begin
fft_digireverse_result_r[digi_reverse_index] <=source_real ;
fft_digireverse_result_i[digi_reverse_index] <=source_imag ;
end
end

thanks

Jim