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Discussion Groups | TMS320C55x | about twiddle table

Technical discussions about the TI C55x DSPs (including the c5501, c5502, c5503, c5507, c5509, c5510 and OMAP5910).

  

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about twiddle table - tms3...@yahoo.com.cn - Jun 2 6:32:29 2008



hi, every one,i have a question about twiddle table.i'm learning fft function in
CCStudio_v3.3\C5500\dsplib\55x_src,but i don't know the arrange rule of the twiddle table in
file twiddle.asm, and the file just give the first two twiddle factor's arrange rule as
following:
	.def twiddle

	.sect ".data:twiddle" 

twiddle:
        .word    32767		; cos(0)
        .word    0000		; sin(0)
        .word    0000		; cos(PI/2) 		
        .word    32767		; sin(PI/2)
        .word    23170		
        .word    23170		
        .word    -23170		
        .word    23170
        .word    30274
        .word    12540
        .word    -12540
        .word    30274
        .word    12540
        .word    30274

Could somebody please give me some hints about the arrange rule of the whole twiddle table 

------------------------------------

OMAP35x EVM jump-starts low-power apps
------------------------------------
The modular and extensible OMAP35x Evaluation Module (EVM) enables developers to start building
applications based on the OMAP35x architecture:http://www.DSPRelated.com/omap35x



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