Sign in

username:

password:



Not a member?

Search Comp.Arch.Embedded



Search tips

embedded by Keywords

68HC11 | 68HC12 | 8051 | 8052 | ARM | ARM7 | Asic | AT91 | AT91RM9200 | Atmel | AVR | AVRStudio | Bootloader | CFP | CompactFlash | Cygnal | Cypress | Dataflash | DSP | eCos | EEPROM | Embedded Linux | Emulator | Endian | Ethernet | Firewire | FPGA | Freescale | GCC | GNUARM | GSM | H8 | HDLC | I2C | Infineon | Interrupts | Java | JTAG | LCD | LED | LPC2000 | MCU | Microchip | MMC | MPLAB | MSP430 | PC104 | PCB | PCI | PCMCIA | PowerPC | Rabbit | RS232 | RS485 | RTOS | SBC | SDRAM | Sensor | SPI | STK500 | UART | UML | USART | USB | Verilog | VHDL | VxWorks | Xilinx

Discussion Groups

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"

You are looking at page 1 of 21.

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: 32-bit Microcontroller for $1.00

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: ANNOUNCE: TimingAnalyzer version beta 0.87

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...Re: Low cost solution to program Spartan 3AN DSP development board AES-SPEEDWAY-S3ADSP-SK Opzioni

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...Brushed DC motor control, low speed, variable torque

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 ...Low cost solution to program Spartan 3AN DSP development board  AES-SPEEDWAY-S3ADSP-SK Opzioni

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...convert 16 bit port to Char

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: Faster than TI C2000?

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...Re: NAND flash misery

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...tiny inductor with every bypass cap?

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: a PC Based Oscilloscope?

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: Sample DOSFS disk image file for testing

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...Re: Global Variables

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...SDR DSP Development board

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: Adding USB thumb-drive support to existing product

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: What Serial Link to use

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: Simple but reliable checksum for small controllers

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: DSP recomendation

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 ...Re: Stack Overflow Detection

DSP Libraries

ratemonotonic - 11:42 27-05-08
Hi All , Are there any opensource/commercial DSP libraries available? Specifically for Digital communications? BR Rate ...DSP Libraries

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: video over ethernet

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: zero latency context switch - The Best Methods !!

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. ...Re: quick logarithms

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...reg in dspi development

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: code optimiation

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: TFT driver

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: Task priority for UI task handling menus and other controls

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: Fixed point numbers in C

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: Advice on uC selection wanted - driving microsteppers etc

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...Re: Large Wireless networks?

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...TFT contrast problem

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: mixing C and assembly

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...Re: FFT timing

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 ...UK Embedded Masterclass

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...Re: SD/MMC card driver for LPC2378

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...UK Embedded Masterclass -

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: Linux serial port dropping bytes

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: Sheet-beam tubes (6ar8, 7360, etc) as analog multipliers

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...Re: Feasible to implement a router on a system on a chip?

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...An important problem for me on C54x, variables initilaization

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 ...Progress in instruction scheduling
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | next