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Discussion Groups | TMS320C54x | 32 bit FIR on 16 bit data -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).
32 bit FIR on 16 bit data -C54x - Author Unknown - Sep 28 21:37:00 2001
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Hello All, I need some help implementing a 32 bit FIR on C54x/C55x. The DSP lib provided by Texas Instruments contains only 16 bit FIRs though it contain a 32 bit IIR on 16 bit data. I found an application report in TI website which describes how to implement a 32 bit FIR on 16 bit data.The coeffcients will be represented as an integer +fractional part[(Ci+Cf)/512].The output will be in q10 format. Since I want to have the output data in q15 format,this method won't be suitable for my application. This is the link which points the document "Extending Fixed-Point Dynamic Ranges" http://www-s.ti.com/sc/psheets/spra249/spra249.pdf Could any one of you provide a code snippet for a 32 bit by 16 bit multiplication and accumulation?If any one provides the code for a 32 bit FIR on q-15 data that would be very helpful. Regards Kumar |
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AW: 32 bit FIR on 16 bit data -C54x - T.Hupp - Oct 1 14:01:00 2001
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Look at spru173 (TMS320C54x Reference Set / Vol 4: Application Guide). Extended precision fractional arithmetic is described there. (Not for 16 x 32 Bit, but this is only a special case of 32 x 32 bit) Good luck Thomas ____________________ -----Ursprungliche Nachricht----- Von: [mailto:] Gesendet: Freitag, 28. September 2001 23:38 An: Betreff: [c54x] 32 bit FIR on 16 bit data -C54x Hello All, I need some help implementing a 32 bit FIR on C54x/C55x. The DSP lib provided by Texas Instruments contains only 16 bit FIRs though it contain a 32 bit IIR on 16 bit data. I found an application report in TI website which describes how to implement a 32 bit FIR on 16 bit data.The coeffcients will be represented as an integer +fractional part[(Ci+Cf)/512].The output will be in q10 format. Since I want to have the output data in q15 format,this method won't be suitable for my application. This is the link which points the document "Extending Fixed-Point Dynamic Ranges" http://www-s.ti.com/sc/psheets/spra249/spra249.pdf Could any one of you provide a code snippet for a 32 bit by 16 bit multiplication and accumulation?If any one provides the code for a 32 bit FIR on q-15 data that would be very helpful. Regards Kumar _____________________________________ |
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