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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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[Q] What are the features of SHARC architecture?
Started by ●April 28, 2004
Reply by ●April 28, 20042004-04-28
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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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Reply by ●April 28, 20042004-04-28
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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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Reply by ●April 28, 20042004-04-28
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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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Reply by ●April 28, 20042004-04-28
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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.
regards,
uday
majeti.
Yahoo! India Matrimony: Find your partner online. |
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Reply by ●April 28, 20042004-04-28
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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 |
Reply by ●April 30, 20042004-04-30
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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 Andr Aranguren Cardona __________________________________ |
