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Discussion Groups | TMS320C54x | AW: Real FFT for C54x
Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).
AW: Real FFT for C54x - Thomas Hupp - Jul 9 14:26:00 1999
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Hello Torgeir TI has a optimized Q31 FFT - but I has not been released yet so you can't find it on their homepage. TI has sent me te routine a few weeks ago - you?ll find it in the attachment. Documentation is available at TI?s homepage - look for SPRA554 (sorry - I have only a printet version - the pdf file got somewhere lost ...). I have not testet the routine yet (still working on approved selfmade C / ASM - Mixed Q31 FFT) - please give me a short info if the routine realy work! Best regards Thomas -----Ursprungliche Nachricht----- Von: Torgeir Jakobsen [SMTP:] Gesendet am: Freitag, 9. Juli 1999 16:07 An: Betreff: [c54x] Real FFT for C54x Hi I need an optimized double precision ( fixed point Q31 format ) 1024 point real FFT routine for the TMS320C54x DSP family. The DSPLIB from Texas only contains single precision ( Q15 format ) FFTs. Best regards Torgeir Jakobsen e-mail: << Datei: ATT00000.html >> ------------------------------------------------------------------------ eGroups.com home: http://www.egroups.com/group/c54x http://www.egroups.com - Simplifying group communications | |||
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Re: AW: Real FFT for C54x - Torgeir Jakobsen - Jul 12 7:45:00 1999
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Hello Thomas Thank you for your response. I have already got these files from Texas. I hoped somone had a real FFT. I imagine that a real FFT is faster than a complex FFT. I can use the routine from Texas an set the imaginary values to zero. I have not testet the routines yet. I have only tried to link them to the existing DSPLIB ( version 1.0 ). I have found a few faults. In addition to the files cfft_32 and cifft_32.asm you also have to include the cfft1024 and cifft1024 to do a 1024 point fft and inverse fft ( or the other cfft???.asm and cifft???.asm files depending on how many points you have ). One of the .include statements in the cifft1024.asm ( and cifft???.asm files ) is wrong. They have written .include cfft_32.asm but the correct is cifft_32.asm. Texas told me that I should condsider the files as a BETA-version, since they have not testet all the files yet. Best regards Torgeir Jakobsen e-mail: -----Original Message----- From: Thomas Hupp <> To: ' <> Date: 9. juli 1999 20:18 Subject: [c54x] AW: Real FFT for C54x >Hello Torgeir > >TI has a optimized Q31 FFT - but I has not been released yet so you can't find it on their homepage. >TI has sent me te routine a few weeks ago - you?ll find it in the attachment. > >Documentation is available at TI?s homepage - look for SPRA554 (sorry - I have only a printet version - >the pdf file got somewhere lost ...). > >I have not testet the routine yet (still working on approved selfmade C / ASM - Mixed Q31 FFT) - please give me >a short info if the routine realy work! > >Best regards >Thomas >-----Ursprungliche Nachricht----- >Von: Torgeir Jakobsen [SMTP:] >Gesendet am: Freitag, 9. Juli 1999 16:07 >An: >Betreff: [c54x] Real FFT for C54x > >Hi > >I need an optimized double precision ( fixed point Q31 format ) 1024 point >real >FFT routine for the TMS320C54x DSP family. The DSPLIB from Texas only >contains single precision ( Q15 format ) FFTs. > >Best regards >Torgeir Jakobsen >e-mail: > > > << Datei: ATT00000.html >> > >------------------------------------------------------------------------ >Just Tell Us What You Want... >Respond.com - Shopping the World for You! >http://clickhere.egroups.com/click/390 >eGroups.com home: http://www.egroups.com/group/c54x >http://www.egroups.com - Simplifying group communications ------------------------------------------------------------------------ eGroups.com home: http://www.egroups.com/group/c54x http://www.egroups.com - Simplifying group communications |
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