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Hi I am using the Ez-Kit lite with ADSP-2181. I am experimenting with the digital filters, and I am also using Analog Devices old DOS based EZ-FIR filter coefficients calculation program. In the Engineer to engineer note EE-91 AD mention that the C-cource code is also available for the EZ-FIR program. I asked the source code from the AD but unfortunately they reply that the code is so old (written 1996) that it is no longer available. Does anybody out there have that ez-fir.c code in some junk directory ???? or any idea where to get it.... Regards, Tapio |
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Ez-Kitt & Ez-Fir
Started by ●December 11, 2001
Reply by ●December 12, 20012001-12-12
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-- Hello, I hope I can help you: ------------------------------ /* This C callable function computes the (FIR) filtered response of a given input sample. The function returns the filtered value of the input. The C Runtime Library Craig Smilovitz Development Tools Engineering Created on 7/20/93 #include <math.h> <Header> int fir(int sample, int coeffs[], int *delay, int taps); <Prototype> */ .MODULE/IMAGE __fir__; #include "lib_glob.h"; #include "flt_glob.h"; .ENTRY fir_; fir_: MR1=TOPPCSTACK; CALL ___lib_save_small_frame; DIS M_MODE; /* ###### Fractional mode ####### */ /* do save here */ /* read parameters */ /*AR is input sample */ /*AY1 is pointer to coeff array*/ reads(MR1,I6,M5); /*MR1 is pointer to pointer to delay line*/ reads(AX0,I6,M5); /*AX0 is number of taps*/ I6=MR1; /*Set I6 to addr of delay_line_ptr */ M5=AX0; modify(I6,M5); /*Move to pointer to delay lines */ M5=1; MR1=DM(I6,M6); /*Fetch pointer to delay line*/ I1=MR1; L1=AX0; DM(I1,M1)=AR; /* put sample in delay line (was changed to M2) */ MR1=I1; DM(I6,M6)=MR1; /* save new delay_line_ptr */ I6=AY1; MR=0, MX0=DM(I1,M1), MY0=PM(I6,M5); /* I1 seems one step too far here */ CNTR=AX0; DO convolution UNTIL CE; convolution: MR=MR+MX0*MY0 (SS), MX0=DM(I1,M1), MY0=PM(I6,M5); MR=MR (RND); IF MV SAT MR; AR=MR1; L1=0; restore_state: ENA M_MODE; /* ###### End Fractional mode ####### */ JUMP ___lib_restore_small_frame; .ENDMOD; On Tue, 11 Dec 2001 12:27:18 tapiogustafsson wrote: >Hi > >I am using the Ez-Kit lite with ADSP-2181. > >I am experimenting with the digital filters, and I am also >using Analog Devices old DOS based EZ-FIR filter coefficients >calculation program. >In the Engineer to engineer note EE-91 AD mention that the C-cource >code is also available for the EZ-FIR program. > >I asked the source code from the AD but unfortunately they reply that >the code is so old (written 1996) that it is no longer available. > >Does anybody out there have that ez-fir.c code in some junk directory >???? >or any idea where to get it.... > >Regards, >Tapio >_____________________________________ >Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > >_____________________________________ >About this discussion group: > >To Join: Send an email to > >To Post: Send an email to > >To Leave: Send an email to > >Archives: http://groups.yahoo.com/group/adsp > >Other Groups: http://www.dsprelated.com/groups.php3 >">http://docs.yahoo.com/info/terms/ > |
