Fft In Sopc

you can use this one:

--- Quote Start ---

module fft_avalon_wraper

(

input clk,

input reset_n,

input mm_writedate,

input mm_write,

input sink_valid,

input sink_sop,

input sink_eop,

input [31 : 0] sink_data,

input sink_error,

input source_ready,

output sink_ready,

output source_error,

output source_sop,

output source_eop,

output source_valid,

output [39 : 0] source_data

);

reg inverse;

always@(posedge clk)

begin

if(mm_write)

inverse = mm_writedate;

end

assign source_data[39 : 38] = 2'b0;

your_fft_from_megawizard fft_inst

(

clk,

reset_n,

inverse,

sink_valid,

sink_sop,

sink_eop,

sink_data[31 : 16],

sink_data[15 : 0],

sink_error,

source_ready,

sink_ready,

source_error,

source_sop,

source_eop,

source_valid,

source_data[37 : 32],

source_data[31 : 16],

source_data[15 : 0]

);

endmodule

--- Quote End ---

your_fft_from_megawizard is your fft module, configure it's interface as streaming.

this wraper contains 3 avalon interface:

streaming sink and streaming source: data input and output, read latency = 0, 8 bits per symbol, use 2 sgdma-s for connecting them to you memory, data adapters may needed.

memory map: control the inverse signal of you fft, set it's addressing as NATIVE.

take attention to the width of sink_data and source_data, you may modify them and their connection to sink_real, sink_imag, source_exp, source_real, source_imag due to your own fft module.

you can refer to fft megacore function user guide.pdf, which contains detailed information about the interface.