用vhdl编写的FFT的代码,很全,很强大.

				@N: CG364 :"D:\Develop\PQS\FPGA\fft_test\fft_test.v":21:7:21:14|Synthesizing module fft_test
				
				@W: CG360 :"D:\Develop\PQS\FPGA\fft_test\fft_test.v":62:11:62:13|No assignment to wire din
				
				@W: CL156 :"D:\Develop\PQS\FPGA\fft_test\fft_test.v":87:4:87:5|*Input din[15:0] to this expression [instance] has undriven bits which are being tied to 0 - a simulation mismatch is possible