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DSP
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 814 threads matching "dsp"
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The most relevant threads are listed first
Re: 32-bit Microcontroller for $1.00
Jim Granville - 19:09 22-07-08
Wilco Dijkstra wrote:
> "Jim Granville" wrote in message news:4884e753$1@clear.net.nz...
>
>
> > Conclusion: Yes the M3 is significant, but it is a
> > _very_ long way from dominating the MCU market, it is not even
> > close to dominating the 32bit MCU market.
>
>
> "M3 is sign...
Re: ANNOUNCE: TimingAnalyzer version beta 0.87
rickman - 23:21 19-07-08
On Jul 19, 7:37 pm, Jerry Avins wrote:
> CBFalconer wrote:
> > timinganalyzer wrote:
> > > rickman wrote:
> > > > timinganalyzer wrote:> Hi All,
>
> > > > > A new version of the TimingAnalyzer, beta 0.87, is now
> > > > > available. The following improvements and chang...Re: Low cost solution to program Spartan 3AN DSP development board AES-SPEEDWAY-S3ADSP-SK Opzioni
MikeWhy - 15:55 16-07-08
"Etantonio" wrote in message
news:5f0f995f-81e1-49e0-b9f0-996d85cd6a64@l42g2000hsc.googlegroups.com...
> I'm in trouble,
> do you think that could be possible to program the FPGA from ethernet
> for this board ?
Not directly. Some combination of one of the many mpu's with embedded
et...Brushed DC motor control, low speed, variable torque
greginfinity - 16:36 14-07-08
I am working on a PID control loop for a brushed DC motor, and everything
works fine and dandy at high speeds. However, the system see a wide
variety of loads, even at low speeds, and I am having trouble controlling
this situation. I have used a gearbox and this obviously helps out a ton,
but am w...Low cost solution to program Spartan 3AN DSP development board AES-SPEEDWAY-S3ADSP-SK Opzioni
Etantonio - 05:07 11-07-08
I'm trying to renew my experience on fpga so last week I buy a
Spartan 3AN DSP development board
AES-SPEEDWAY-S3ADSP-SK from Silica for about 235euro.
But I've not the cable to program it, so I ask to Silica that suggest
me the
http://www.xilinx.com/products/devkits/HW-USB-G.htm
for 140 euros ...convert 16 bit port to Char
Thomas Magma - 14:24 03-07-08
Hello,
I'm programming in C on a dsPIC33F and I'm trying to find the most efficient
way to save a 8-bit signed value found on the LSByte of PORTD to a CHAR.
That is, the lower byte of PORTD contains a signed integer that is 8-bits
wide and I need to save it to a CHAR data type. I don't care...Re: Faster than TI C2000?
Vladimir Vassilevsky - 19:54 02-07-08
Chris Carlen wrote:
> Even though I am able to do what I want with the existing 150MHz
> TMS320F2812 digital signal controller (DSC), I am always eager to have
> more speed, since applications that were otherwise inconceivable may
> become possible if more speed becomes available.
...Re: NAND flash misery
Habib Bouaziz-Viallet - 02:39 29-06-08
Le Fri, 27 Jun 2008 11:10:29 -0500, Vladimir Vassilevsky a écrit:
> Since the flash iself is hidden behind the IDE interface and
> a compatible file system, and the read/write performance is critical, it
> is generally impossible to apply an error correction scheme.
"... generally imposs...tiny inductor with every bypass cap?
Talal Itani - 12:06 21-06-08
Hello,
I was looking at the schematics for a DSP-based board, running at 100 MHz.
They have a tiny inductor with every bypass cap around the DSP. Do you
think this is necessary? This DSP has analog stuff built-in. If we do not
need analog, can the inductors be eliminated?
Thanks,
T.I...Re: a PC Based Oscilloscope?
Talal Itani - 10:22 21-06-08
We are developing a board with a DSP, some logic, and some analog circuitry.
The scope will be used to debug the circuit, make sure signals are clean,
make sure timing is correct. We should get a 4-channel 350 MHz scope, yet
these start at $7,000. So, I thought maybe a PC-based scope wou...Re: Sample DOSFS disk image file for testing
robertwessel2@yahoo.com - 12:57 18-06-08
On Jun 17, 8:50=A0pm, Vladimir Vassilevsky
wrote:
> robertwess...@yahoo.com wrote:
> > My mistake - I was editing and got a FAT16 comment mixed in with the
> > FAT32 comment. =A0FAT32 volumes cannot be smaller than 32MB, and FAT16
> > volumes must be smaller than 2GB. =A0FAT32 volumes...Re: Global Variables
Tim Wescott - 15:02 17-06-08
John Speth wrote:
> > I'm working on code that requires the use of large number of global
> > variables. To restrict access I'm thinking of making the globals read only
> > in all source files bar the file that writes it.
> >
> > The construct I would like to implement uses two declaration...SDR DSP Development board
ratemonotonic - 10:16 13-06-08
Hi all ,
I have a requirement for a DSP board for development of SDR
applications. The carrier frequency we are looking at is max 8Khz so
there is no IF required, we can sample data straight in. The boards
that I have found are mostly with ADCs with high sampling rate
( ~56Mhz). I require som...Re: Adding USB thumb-drive support to existing product
greginfinity - 17:50 12-06-08
I just got done interfacing a GHIelectronics uALFAT to a dsPIC to be able
to bootload from a USB key. Not too bad (other than writing the part to
digest the HEX file and write to flash). It is probably going to be an
additional $12 when all said and done in quantity for the project since you
have ...Re: What Serial Link to use
18:40 09-06-08
On Jun 9, 6:20 am, "Jalon" wrote:
> In other words i find easy to understand these protocols individually but
> when it comes to design/architect a system what points will help me in
> going one of these protocols.
Something I would add is the the asynchronous protocols work well
betw...Re: Simple but reliable checksum for small controllers
Tauno Voipio - 14:28 09-06-08
Vladimir Vassilevsky wrote:
>
>
> Tilmann Reh wrote:
>
> > for an integrity check of the program code for small controller (8051
> > derivatives), I am looking for an efficient checksum method.
>
>
> CRC is the most reliable method for a given number of check bits.
>
> > ...Re: DSP recomendation
Chris Carlen - 17:23 02-06-08
Joel wrote:
> I'm looking to create a portable stereo audio device. This system is
> exactly what I am looking for:
>
> http://www.amis.com/products/dsp/belasigna_200.html
>
> However the evaluation and development tools are thousands of dollars
> which puts it out of reach. Can so...Re: Stack Overflow Detection
Richard Phillips - 13:18 30-05-08
Vladimir Vassilevsky wrote:
> Richard Phillips wrote:
> > Hello all,
> >
> > I'm thinking about implementing the above in a system I'm working
> > on, does anyone have a good strategy for doing this?
>
> Look into the map file. A sensible linker will provide the call tree
> with the ...DSP Libraries
ratemonotonic - 11:42 27-05-08
Hi All ,
Are there any opensource/commercial DSP libraries available?
Specifically for Digital communications?
BR
Rate
...Re: video over ethernet
ratemonotonic - 08:34 25-05-08
On 25 May, 01:47, "David M. Palmer" wrote:
> In article
> ,
>
> ratemonotonic wrote:
> > Hi thankf for the response,
> > I am looking got a programmable board with a camera and a ethernet
> > interface is there anything available out there.
>
> If you want an Camera with...Re: zero latency context switch - The Best Methods !!
donald - 08:20 16-05-08
Vladimir Vassilevsky wrote:
>
>
> David Brown wrote:
> > Wim Lewis wrote:
> >
> > > In article ,
> > > Bill Leary wrote:
> > >
> > > > "CBFalconer" wrote in message
> > > > news:482BBFBC.71A71101@yahoo.com...
> > > >
> > > > > Remember the Z80? One instruction fli...Re: quick logarithms
Peter Harrison - 17:12 15-05-08
linnix wrote:
> On May 15, 11:59 am, Peter Harrison
> wrote:
> > I have a problem that generates measurements of distance. The measured
> > values fit the general form
> >
> > I = A * exp(-B * x)
> >
> > where x is distance.
> >
> > I can calibrate and get values for A and B. ...reg in dspi development
moonboy - 16:30 11-05-08
Hi,
I am developing dspi code for mcf54452 board. I am communicating processor
with EEPROM (AT25080A) slave device. Write function is working fine. But
the read function is not working.
Write seq:
----------
1. Send WREN command
2. Send write Instruction
3. Send address where to be dat...Re: code optimiation
David Brown - 15:19 10-05-08
Tomás Ó hÉilidhe wrote:
> On May 10, 9:11 am, "aamer" wrote:
> > Dear all,
> >
> > Are there any hard and fast rules for code optimization in C targetting a
> > processor.
>
>
> I'd advocate using types like "uint_fast8_t" instead of "unsigned
> int"; that way you'll get good ...Re: TFT driver
John McCabe - 05:30 07-05-08
On Tue, 6 May 2008 10:19:38 -0700 (PDT), silusilusilu@gmail.com wrote:
> Hi,
> do you know any low cost lcd tft driver? I'm thinking also in a
> integrated solution (MCU with integrated lcd driver). What do you
> think? I'm searching a low cost and low power solution...Any
> suggestion?
It...Re: Task priority for UI task handling menus and other controls
Ed Prochak - 12:41 02-05-08
On May 1, 7:32 pm, Vladimir Vassilevsky
wrote:
> Steve Watt wrote:
> > [0] OK, a continuous 200 ms lag of response in my joystick would make
> > landing on a carrier somewhat harder. On the other hand, if it was
> > always there, it could be trained around and compensated for.
>
>...Re: Fixed point numbers in C
Florian Teply - 03:49 30-04-08
tims next home schrieb:
> Continuing the theme of interview questions, last week I was asked about
> fixed point numbers in C.
>
> I am aware that there is a proposal to add this feature to the language,
> but I've never actually seen it.
>
> Are there any compilers offering this?
...Re: Advice on uC selection wanted - driving microsteppers etc
Tim Wescott - 11:32 26-04-08
On Fri, 25 Apr 2008 19:43:39 +0000, Peter Dickerson wrote:
> I've just got involved in a project that basically doesn't work. All
> sorts of design issue. It needs a complete overhaul of the electronics.
> I have experience with ARM based devices having just completed a product
> range of ...Re: Large Wireless networks?
JB - 08:49 24-04-08
Vladimir Vassilevsky wrote:
>
> The task is to create a large (up to 10k nodes) ad-hoc wireless
> network covering the area of several sq. km, so there is a need for
> many retransmission hops. The nodes are not moving; however the network
> should be able to reconfigure itself onc...TFT contrast problem
hapedo - 07:27 23-04-08
Dear colleagues,
I'm trying to interface Casio 3,5" TFT display (COM35T3193KTC) to Epson
S1D13705 controler and Freescale MC56F8366 DSP. After a day of timing
configuring everything seems to be OK but I have one big problem with
display contrast and colors - it's not possible to display whole black...Re: mixing C and assembly
David Brown - 03:51 23-04-08
Chris H wrote:
> In message , Hans-Bernhard Bröker
> writes
> > Lax wrote:
> > > Are there any situations where programming an embedded processor
> > > "requires" at least some assembly code?
> >
> > Yes. Somebody, somewhere, some time, will have to write some assembly
> > co...Re: FFT timing
Steven G. Johnson - 12:47 21-04-08
On Apr 21, 5:30 am, Martin Brown
wrote:
> Which compiler did you use for these benchmarks?
gcc 4.1.2
> absolute timing. I am a bit surprised though that an optimised 2^N
> transform cannot beat a radix 10 in terms of time per element
> processed though - overheads in radix 5 are qui...UK Embedded Masterclass
11:26 17-04-08
Hi,
only a few places left for the Embedded Linux workshop - but event
also covers UML, GUI development, DSP farms, FPGA etc www.embedded-masterclass.com
May 8th and 13th
...Re: SD/MMC card driver for LPC2378
Jaime Andres Aranguren Cardona - 11:52 06-04-08
Hi,
There was an interesting demo on Circuit Cellar, some 2005 issue.
If you beed more details, just let me know (Of course, not 4 bit mode!)
--
Jaime Andres Aranguren C.
SanJaaC Electronics
Soluciones en DSP
www.sanjaac.com
"Habib Bouaziz-Viallet" escribió en el mensaje
ne...UK Embedded Masterclass -
14:11 04-04-08
Hi,
just a quick note to let you know that we are running another Embedded
Masterclass - it is in London and but to be repeated in Bristol (8th
and 13th May). For those of you that have never attended, its a non-
sales forum to learn about the latest and greatest stuff. This year
will include...Re: Linux serial port dropping bytes
Derek Young - 14:02 02-04-08
Grant Edwards wrote:
> On 2008-04-02, Derek Young wrote:
>
> > > > So that leaves the real problem handling throughput of
> > > > approximately 1 char each 10 microsec.
> > > That's where a large FIFO becomes important. Using Linux on
> > > an XScale (which, IIRC, is is what the OP ...Re: Sheet-beam tubes (6ar8, 7360, etc) as analog multipliers
Tim Wescott - 18:56 31-03-08
On Mon, 31 Mar 2008 14:05:45 -0600, msg wrote:
> Posted to two newsgroups known to be read by likely respondents ;)
>
> The published literature on pre-solid-state electronic analog
> multipliers is scant except for production equipment from analog
> computer makers (which by now is dif...Re: Feasible to implement a router on a system on a chip?
dspfun - 06:32 29-03-08
On 28 Mar, 16:41, Keith M wrote:
> dspfun wrote:
>
> (after snipping)
>
> > So, how many MPPS (64-byte packets) can a FPGA forward?
>
> > What would you estimate the highest possible packet forwarding rate
> > (MPPS) to for a single high-end FPGA?
>
> I really don't think a...An important problem for me on C54x, variables initilaization
ahmadagha23 - 04:29 24-03-08
Dear group
1-In Code composer when I change the init model method in linker tab of
build option from "run time initialization" to "load time initialization"
at the load time of my .out file to DSP, it shows the data verification
error on ".idata0" section while this section is not defined in my cmd...Progress in instruction scheduling
Stephan Ceram - 15:09 19-03-08
Hi,
the compiler optimization "instruction scheduling" is a quite old
technique that can be found in many modern compilers. From some
standard compiler books, I got to know that many schedulers are based
on "list scheduling" which seems to be the standard approach. An
advanced approach based ...