Fft In Sopc

why the program stuck in this line?

while (IORD(SGDMA_ST_TO_MM_FFT_BASE,0)!=14) {};

when i check the return value of IORD(SGDMA_ST_TO_MM_FFT_BASE,0) is always 8. could somebody give me a solution? Should we add a process in the wrapper?

thanks...

Here is the fft code wrapper as mentioned earlier in the thread.

module fft_avalon_wraper

(

clk,

reset_n,

mm_writedate,

mm_write,

sink_valid,

sink_sop,

sink_eop,

sink_empty,

sink_real,

// sink_imag,

sink_error,

source_ready,

sink_ready,

source_error,

source_sop,

source_eop,

source_valid,

source_data,

source_empty

// ,source_exp

);

input clk;

input reset_n;

input [7 : 0] mm_writedate;

input mm_write;

input sink_valid;

input sink_sop;

input sink_eop;

input [2 : 0] sink_empty;

input [31 : 0] sink_real;

//input [31 : 0] sink_imag;

input [1 : 0] sink_error;

input source_ready;

output sink_ready;

output [1 : 0] source_error;

output source_sop;

output source_eop;

output source_valid;

output [31 : 0] source_data;

output [2 : 0] source_empty;

//output [5 : 0] source_exp;

reg inverse=0;

reg [15 : 0]sink_imag=0;

wire [5 : 0] source_exp;

reg [10 :0] fftpts_in;

FFT fft

(

.clk(clk),

.reset_n(reset_n),

.inverse(inverse),

.sink_valid(sink_valid),

.sink_sop(sink_sop),

.sink_eop(sink_eop),

.sink_real(sink_real[15 : 0]),

.sink_imag(sink_imag),

.sink_error(sink_error),

.source_ready(source_ready),

.sink_ready(sink_ready),

.source_error(source_error),

.source_sop(source_sop),

.source_eop(source_eop),

.source_valid(source_valid),

.source_exp(source_exp),

.source_real(source_data[15 : 0]),

.source_imag(source_data[31 : 16]));

endmodule