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Article #2411

Re: DSP for audio work

#2411
From: KG7HF
Date: Tue, 26 Mar 2002 01:45
135 lines
5866 bytes
Only the code size is limited.  You can use as much data memory (i.e.
variables and coefficients) as there is memory.   The kit can boot stand
alone out of flash which is fully available to the user without any worry
about destroying a monitor program (like in older EZkits).  There is no
shared resources (i.e. shared with a monitor) to worry about like in the
older ezkits.  There is also internal program memory and data memory as well
as 100Mhz SDRAM (I don't remember how much now.)   There are about 25
example programs in both C and assembly which ship with the kit.

As for a program memory limitation, I imagine there ways around that too.

PD



"Johnny" <john_wr100@yahoo.com> wrote in message
news:3c9f052b.29785569@news.optusnet.com.au...
> On Sun, 24 Mar 2002 17:31:58 -0500, "KG7HF" <KG7HF@amsat.org> wrote:
>
> Thanks for the advice PD and also thanks to Al.
>
> Yes I got a quote on the 21161 kit this today.  Its basically US$500..
>
>  Mutiple channels should give pretty awesome for my app.  and 600MFLOP
> should allow higher sampling rates whether I need them or not. Pity
> there dosen't appear to be any SP-DIF receivers or transmitters.  But
> I could probably design a little daugher board to do this .. one
> day...
>
> One thing that concerns me is that the evaluation kit is limited to
> 8kb program size.  ie 2048 Words.   Should I assume this is going to
> be more than enough for my FIR filter implementation?
>
> I wonder, is there separate memory space to store my filter
> co-efficients... Because I will probably have nearly 2000 filter
> coeficients which wouldn't leave a lot of space for program.
>
> Also I suppose the program must be stored in a low-speed flash memory
> anyway, and probably gets loaded by the boot loader or external
> micro..  Yes.. I got a lot more research to do.. Hopefully I will be
> able to get a soft-copy of the users manual from the AD rep.
> Obvioulsy I will study the data sheet.
>
> Thanks agian..
> John.
>
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> >I agree, the 21161N EZ-Kit would be a good choice since you budget is
$500.
> >The debugger with the 21161N Ez-Kit is USB based, and is much faster and
> >more robust than that available with the 21065L EZ-Kit.  I think you will
> >also find that if you do run into any technical difficulties, you will
get a
> >much better responses using the newer evaluation boards.
> >
> >PD.
> >
> >
> >"Al Clark" <dsp@danvillesignal.com> wrote in message
> >news:Xns91DB81B2F6D2aclarkdanvillesignal@209.249.90.101...
> >> john_wr100@yahoo.com (Johnny) wrote in news:3c9db1ea.6888487
> >> @news.optusnet.com.au:
> >>
> >> > On Sun, 24 Mar 2002 10:18:32 GMT, john_wr100@yahoo.com (Johnny)
wrote:
> >> >
> >> > I am planning on doing some experimentation with digital fitlers. I
> >> > want to make an active crossover for my audio system. I was looking
at
> >> > one of the following kits:
> >> >
> >> > Motorola DSP5636X Evaluation module.
> >> > or
> >> > Analog devices ADSP-21065L Ez-Kit lite
> >> >
> >> > I probably need about 80 Million multiply/accumate per second and at
> >> > least 24bit fixed point. Faster is better though.
> >> >
> >> > I dont mind programming in Assembly or C language.  I figure that
> >> > assembly is probably fine because my code should be pretty simple
just
> >> > to implement FIR filters and  I/O functions.  I was kind of scared by
> >> > roughly 1000 pages of documentation for the motorola development
> >> > system and DSP programmers guide.
> >> >
> >> > Does anyone have experience with these kits?
> >> > Which is easier to use, and will offer the best learning curve?
> >> > Should I look at Texas Instuments or other DSPs?
> >> > What kits are the best value for money?
> >> >
> >> > I was thinking of spending around US$500, but I might be able to
> >> > extend that.
> >> >
> >> > best regards,
> >> > Johnny
> >> >
> >> >
> >>
> >> Since you mentioned crossovers, I assume you need at least 4 channels
of
> >> DACs. I would get a 21161 EZ-Kit. This 21161 is much faster than the
> >> 21065L. It also has SIMD hich will work very well for your application.
> >>
> >> The EZ-Kit was 8 channels of 96kHz DACs.
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Al Clark
> >> Danville Signal Processing, Inc.
> >> --------------------------------------------------------------------
> >> Purveyors of Fine DSP Hardware and other Cool Stuff
> >> Available at http://www.danvillesignal.com
> >
> >
>
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From: "KG7HF" <KG7HF@amsat.org>
Newsgroups: sci.electronics.design,aus.electronics,comp.dsp
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Subject: Re: DSP for audio work
Date: Mon, 25 Mar 2002 20:45:19 -0500
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