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Discussion Groups | Analog Devices DSPs | [Q] What are the features of SHARC architecture?
Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).
[Q] What are the features of SHARC architecture? - skim19750511 - Apr 28 0:03:00 2004
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Hello every members :) What are the features of SHARC architecture comparing with the Harvard architecture ? SHARC architecture is a modified Harvard architecture ? |
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Re: [Q] What are the features of SHARC architecture? - andor_bariska - Apr 28 9:45:00 2004
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"skim19750511" wrote: > Hello every members :) > > What are the features of SHARC architecture comparing with the > Harvard architecture ? > > SHARC architecture is a modified Harvard architecture ? Yes, SHARC is an acronym for super-harvard-architcture. I guess the super refers to the instruction cache, which allows using the two busses for simultaneous double data access. Regards, Andor |
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Re: Re: [Q] What are the features of SHARC architecture? - Mike Rosing - Apr 28 13:50:00 2004
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On Wed, 28 Apr 2004, andor_bariska wrote: > "skim19750511" wrote: > > Hello every members :) > > > > What are the features of SHARC architecture comparing with the > > Harvard architecture ? > > > > SHARC architecture is a modified Harvard architecture ? > > Yes, SHARC is an acronym for super-harvard-architcture. I guess the > super refers to the instruction cache, which allows using the two > busses for simultaneous double data access. Right, but you have to set things up so you get data from program memory while the program is in cache. Great for filter loops. The Mot chips have a triple bus, 2 data and 1 instruction. The dual core SHARC's have 64 bit wide data buses so each core gets 32 at a time. But it's single instruction, so it's great for real,imaginary computations and stereo filters. But to take full advantage of it, your data buffers must be split between program space and data space, and your loop has to fit into cache (32 instructions). Patience, persistence, truth, Dr. mike |
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Re: Re: [Q] What are the features of SHARC architecture? - Martin.J Thompson - Apr 28 15:44:00 2004
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Mike Rosing wrote: <snip> >The Mot chips have a triple bus, 2 data and 1 instruction. The dual >core SHARC's have 64 bit wide data buses so each core gets 32 at a time. >But it's single instruction, so it's great for real,imaginary computations >and stereo filters. But to take full advantage of it, your data buffers >must be split between program space and data space, and your loop has >to fit into cache (32 instructions). I thought (based on my 21061 experience a long time ago) the cache was only used when a Program read conflicted with a PM data read? So your loop can be longer than 32 instructions, but if you have more than 32 reads from PM data, you'll start getting cache misses. Or am I out of date? Thanks, Martin -- Martin Thompson CEng MIEE TRW Conekt Stratford Road, Solihull, B90 4GW. UK Tel: +44 (0)121-627-3569 - |
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how to interface MATLAB and EZ-KIT LITE board with ADSP-21061processor - Uday Kumar Majeti - Apr 28 17:04:00 2004
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Hello everybody,
I have developed source code for FIR filter using Windowing technique for my
SHARC processor (ADSP-21061). It's working fine.
In MATLAB i have developed one GUI (Graphical User Interface) in which
i enter all the parameters (filter specifications) needed for the development of
FIR filter and i got the filter coefficients. I'm able to place
these coefficients in the coefficient.dat source file of my SHARC processor.
Question: 1. I want to implement the following task.
If i create a RUN button in my GUI and when i click that button, it should down load the (.21k
file) into the SHARC processor memory.
2. Is there any tool in MATLAB to get interfaced with ADSP-21061
processor?
If any body have any idea of how to do this plz help me. Any suggestions regarding
this will be greatly appreciated.
; &nbs
p; &nb
sp;
regards,
; &nbs
p; &nb
sp; uday
majeti.
Yahoo! India Matrimony: Find your partner online. |
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Re: Re: [Q] What are the features of SHARC architecture? - Mike Rosing - Apr 28 20:20:00 2004
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On Wed, 28 Apr 2004, Martin.J Thompson wrote: > I thought (based on my 21061 experience a long time ago) the cache was >only used when a Program read conflicted with a PM data read? So your >loop can be longer than 32 instructions, but if you have more than 32 >reads from PM data, you'll start getting cache misses. > > Or am I out of date? Nope, I think you are correct. Every loop I've written conflicts on each instruction, and 32 has been way more than enough. But if only 1 in 10 instructions has a problem, you can have a much bigger loop. Thanks for pointing that out! Patience, persistence, truth, Dr. mike |
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Re: how to interface MATLAB and EZ-KIT LITE board with ADSP-21061processor - Jaime Andres Aranguren Cardona - Apr 30 0:21:00 2004
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Hi! Comments inlined. JaaC --- Uday Kumar Majeti <> wrote: > Hello everybody, > > I have developed source code for FIR filter using > Windowing technique for my SHARC processor > (ADSP-21061). It's working fine. > > In MATLAB i have developed one GUI (Graphical User > Interface) in which i enter all the parameters > (filter specifications) needed for the development > of FIR filter and i got the filter coefficients. I'm > able to place > these coefficients in the coefficient.dat source > file of my SHARC processor. > > Question: 1. I want to implement the following > task. > If i create a RUN button in my GUI > and when i click that button, it should down load > the (.21k file) into the SHARC processor memory. > 2. Is there any tool in MATLAB to > get interfaced with ADSP-21061 processor? I think there are some features since Matlab 6.1 which let you communicate with external stuff via serial (COM) ports. You could download the coefficients to a buffer in memory, from where you update your filter. > If any body have any idea of how to do this plz > help me. Any suggestions regarding this will be > greatly appreciated. > > regards, > > uday majeti. > > Yahoo! India Matrimony: Find your partner online. ===== Jaime Andrés Aranguren Cardona __________________________________ |
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