IP core FIR Configuration Problems

Hello All,

I use the Cyclone IV FPGA to realize bandpass FIR. And I use the quartus 11.0 version.

The configuration of IP core FIR are as follows:

Filter Type: bandpass

windows type: hanning

coefficents: 64

Sample rate: 1MHz

Cutoff Frequ.1: 5Hz

Cutoff Frequ.2: 200Hz

Input and output bit width: 8

clk: 1MHz

reset_n: 1

ast_sink_data[7..0]: ad_data, which are from AD, the AD frequecy is 15KHz

coef_set: 1

ast_sink_valid: 1

ast_source_ready: 1

ast_sink_error: 0

ast_souuce_data[7..0]: 0, which always keep 0 whatever i change the input.

Would you please help check what are the problems? Very urgency:confused:. Thank you very much.

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