Hi, Here is another question : I'm designing a FIR filter program (on a TMS320VC5402) and as a consequence i calculated the coefficients with an online software. The issue is that this software gives the coefficient in real number representation. In the program, when defining the buffer which contains the coefficients, i guess they must be declared as Q15 numbers or another hexadecimal (fixed-point) representation. So my question is : is there a software (free!) which converts real numbers to hexadecimal Q15 ? Of course i could do it myself, but converting 99 coefficients will be very long!! Thanks.
FIR coefficient : is there a software which allows to convert real number coefficients to hexadecimal Q15 ones ?
Started by ●March 25, 2004
Reply by ●March 25, 20042004-03-25
"french_student" <jerome_lapeyre_mirande@hotmail.com> wrote in message news:b261816f.0403250015.611509f8@posting.google.com...> Hi, > > Here is another question : > > I'm designing a FIR filter program (on a TMS320VC5402) and as a > consequence i calculated the coefficients with an online software. The > issue is that this software gives the coefficient in real number > representation. In the program, when defining the buffer which > contains the coefficients, i guess they must be declared as Q15 > numbers or another hexadecimal (fixed-point) representation. So my > question is : is there a software (free!) which converts real numbers > to hexadecimal Q15 ? Of course i could do it myself, but converting 99 > coefficients will be very long!! > > Thanks.An Excel-like spreadsheet will do it fairly quickly. Took me about 5 minutes to generate a table of 256 cosine values from 0 to Pi/2 in 1.15 Hex today. Cheers, -- Alf alfkatz@remove.the.obvious.ieee.org --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.601 / Virus Database: 382 - Release Date: 29/02/2004
Reply by ●March 25, 20042004-03-25
try my software: http://winfilter.20m.com salutation, Adrian french_student wrote:> Hi, > > Here is another question : > > I'm designing a FIR filter program (on a TMS320VC5402) and as a > consequence i calculated the coefficients with an online software. The > issue is that this software gives the coefficient in real number > representation. In the program, when defining the buffer which > contains the coefficients, i guess they must be declared as Q15 > numbers or another hexadecimal (fixed-point) representation. So my > question is : is there a software (free!) which converts real numbers > to hexadecimal Q15 ? Of course i could do it myself, but converting 99 > coefficients will be very long!! > > Thanks.
Reply by ●March 26, 20042004-03-26
Thank you Adrian, but i can't download your software : there is an error when trying to make "save target". Moreover, i work on windows XP so i guess your software won't work on my PC. Adrian <I_HATE@SPAM.com> wrote in message news:<40630692_2@news.tiscalinet.ch>...> try my software: > > http://winfilter.20m.com > > salutation, > Adrian > > french_student wrote: > > Hi, > > > > Here is another question : > > > > I'm designing a FIR filter program (on a TMS320VC5402) and as a > > consequence i calculated the coefficients with an online software. The > > issue is that this software gives the coefficient in real number > > representation. In the program, when defining the buffer which > > contains the coefficients, i guess they must be declared as Q15 > > numbers or another hexadecimal (fixed-point) representation. So my > > question is : is there a software (free!) which converts real numbers > > to hexadecimal Q15 ? Of course i could do it myself, but converting 99 > > coefficients will be very long!! > > > > Thanks.
Reply by ●March 26, 20042004-03-26
i don t know why it doesn t work !!! Try this link : http://www.scs.ch/~kundert/bin/WinFilter/WinFilter.exe Adrian french_student wrote:> Thank you Adrian, but i can't download your software : there is an > error when trying to make "save target". > Moreover, i work on windows XP so i guess your software won't work on > my PC. > > Adrian <I_HATE@SPAM.com> wrote in message news:<40630692_2@news.tiscalinet.ch>... > >>try my software: >> >>http://winfilter.20m.com >> >>salutation, >>Adrian >> >>french_student wrote: >> >>>Hi, >>> >>>Here is another question : >>> >>>I'm designing a FIR filter program (on a TMS320VC5402) and as a >>>consequence i calculated the coefficients with an online software. The >>>issue is that this software gives the coefficient in real number >>>representation. In the program, when defining the buffer which >>>contains the coefficients, i guess they must be declared as Q15 >>>numbers or another hexadecimal (fixed-point) representation. So my >>>question is : is there a software (free!) which converts real numbers >>>to hexadecimal Q15 ? Of course i could do it myself, but converting 99 >>>coefficients will be very long!! >>> >>>Thanks.
Reply by ●March 29, 20042004-03-29
It works now! Thank you Adrian. Adrian <I_HATE@SPAM.com> wrote in message news:<4063f965$1_1@news.tiscalinet.ch>...> i don t know why it doesn t work !!! > > Try this link : > http://www.scs.ch/~kundert/bin/WinFilter/WinFilter.exe > > Adrian > > french_student wrote: > > Thank you Adrian, but i can't download your software : there is an > > error when trying to make "save target". > > Moreover, i work on windows XP so i guess your software won't work on > > my PC. > > > > Adrian <I_HATE@SPAM.com> wrote in message news:<40630692_2@news.tiscalinet.ch>... > > > >>try my software: > >> > >>http://winfilter.20m.com > >> > >>salutation, > >>Adrian > >> > >>french_student wrote: > >> > >>>Hi, > >>> > >>>Here is another question : > >>> > >>>I'm designing a FIR filter program (on a TMS320VC5402) and as a > >>>consequence i calculated the coefficients with an online software. The > >>>issue is that this software gives the coefficient in real number > >>>representation. In the program, when defining the buffer which > >>>contains the coefficients, i guess they must be declared as Q15 > >>>numbers or another hexadecimal (fixed-point) representation. So my > >>>question is : is there a software (free!) which converts real numbers > >>>to hexadecimal Q15 ? Of course i could do it myself, but converting 99 > >>>coefficients will be very long!! > >>> > >>>Thanks.
