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ARM
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 1847 threads matching "arm"
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STR912 bitfield access to memory mapped peripherals
frikkiethirion - 11:17 25-07-08
Good day,
I wonder if somebody has managed to create a structured way of accessing
the memory mapped IO attached to the STR912 [ARM9] via bitfields.
I can manipulate the members of a union that is declared in main(), bus as
soon as I make a pointer type of my union and point it to the memory bu...
reason for difference in MIPS between simulator and Board
swami.kmb - 10:09 24-07-08
Dear Friends,
I am porting eAAC decoder in ARM926EJ-S (ARM9E core)
The MIPS measurement in simulator and onboard are not same.
MIPS onboard is higher than in simulator(4 to 6 MIPS)
can anyone tell me what's the reason behind this?
MIPS are measured onboard with cache disabled(at this point,will...Calculate Interrupt Latency of FreeRTOS with LPC23xx
lucians - 10:09 24-07-08
Hi guys,
i'm a student of University of Genoa (Italy). I'm new on your website and
i have already found some important information for my research. You are
very cool and professional.
Now i write here because i want to try to calculate the Interrupt Latency
for freeRTOS using an ARM LPC23xx.
...Re: Virtualizing QNX 6.0
AZ Nomad - 09:06 24-07-08
On Thu, 24 Jul 2008 11:31:49 +0200, Dombo wrote:
> AZ Nomad schreef:
> > On Wed, 23 Jul 2008 17:17:11 +0200, Dombo wrote:
> > > AZ Nomad schreef:
> > > > On Wed, 23 Jul 2008 15:12:30 +0200, Dombo wrote:
> > > > > AZ Nomad schreef:
> > > > > > On Tue, 22 Jul 2008 22:07:49 -0500, J...Re: Finding power - gnd shorts
JSprocket - 03:11 23-07-08
rickman wrote:
> I have a small module that is shorted between the +12 volt plane and
> ground. I am having a hard time finding where the short is so it can
> be fixed.
>
I had this some years ago with my very first 4 layer PCB. Aaaargh! I
took a board and sawed it in half: the short ...Re: Cheapest USB microcontroller?
Neil - 00:38 23-07-08
Bob wrote:
> Does anyone know the lowest cost microcontroller with a USB interface?
>
> I have done some Googling, and it seems there are quite a few USB
> microcontrollers based on either ARM or 8051. Either is okay, but
> they are not very cheap. They are all over $3 @ qty 1000.
>
...max. number of mapped spaces for ARM 926ES
Martinfnp - 10:43 22-07-08
Please, does anybody knows what's the limit of memory mapped regions
for cache through CP15 in ARM 926EJ-S? Where do I find that info
usually? I do not see that in user's manual and also I cannot read
back that info or see it like in PowerPC through DBAT-IBAT registers.
Thanks.
...Re: computer-driven fans
Ron Ford - 21:44 21-07-08
On Mon, 21 Jul 2008 08:55:29 -0400, Rich Webb posted:
> On Sun, 20 Jul 2008 21:55:10 -0600, Ron Ford wrote:
>
> > It would certainly seem that Atmel is the norm for AVR RISC controllers.
> > The link didn't have any information about prices. While it looked like
> > the chips themselve...Re: Need RTOS & SSH for ARM-based remote terminal
JeffR - 20:11 21-07-08
> Processor is Atmel AT91SAM7XC256 connected by GSM modem. The client has
> specified "encryption". I think it needs a formal RTOS and Secure Shell;
> client says "get it working ASAP first and we'll add encryption later."
>
> Any recommendations? btw the eCosPro SSH middleware seems to be serv...32-bit Microcontroller for $1.00 -Guy Macon
Guy Macon - 15:10 21-07-08
While researching something else, I ran into the
following rather interesting opinions:
Consolidating the MCU market around the ARM architecture
("It's inevitable. ARM's Cortex-M3 processor core is going
dominate the MCU market.")
http://www.embedded.com/columns/guest/207001013
Lum...Re: powerPC linux boot sequence
JeffR - 08:38 21-07-08
> Any can help me to find the boot sequence of powerPC 83xx of linux
> kernel after the bootloader transfer control to kernel..
>
> Please please help me....
>
> thanks,
> Nabendu
>
mkimage is run as part of the kernel build process, and creates the image
header that uboot (or whatever ...Re: Good hobbyist VGA camera module?
Mike Harrison - 17:30 16-07-08
On Wed, 16 Jul 2008 12:44:06 -0700 (PDT), larwe wrote:
> Can someone suggest a reasonably-priced monochrome camera module (I
> can live with color but don't need it), VGA-resolution camera module
> with some kind of buffer and low-speed interface; SPI, I2C, RS232,
> etc. SPI would be my pre...MAX3421EUSB Peripheral enumerates as low speed
Bill Davy - 11:24 13-07-08
Good afternoon.
I am trying to get a MAX3421E running as a peripheral and it keeps coming up
in low-speed. I cannot see any bits I can use to change this. The device
appears to work. It is a call to WinUsb_QueryDeviceInformation(usbHandle,
DEVICE_SPEED, &length, &speed) which returns...build an arm board to run linux
manche - 16:07 11-07-08
I want to build an arm board to run linux. I'm not really interested in
buying a board and messing around with it. I would go for a schematic
though. Any pointers on how I could get started? I have heard mixed advice
from people. Some say the atmel arm microcontrollers are pretty easy to
hook up to ...Microcontroller Board
paul.angelin - 16:06 11-07-08
Dear friends,
I am looking for a 32 bit Microcontroller Board for our project.The board
must contain ADC & DAC.(If DAC is not there no problem).ROM- above 8 MB,
RAM- above 20 MB and it should have CAN Controller.Please Help me by
suggesting some boards that are not ARM based.
Angelin
...Re: Processors with remote programming / debugging
Stephen Pelc - 13:25 09-07-08
On Wed, 09 Jul 2008 08:25:44 -0500, "lucasvickers"
wrote:
> Hello,
> I am looking into potential embedded microprocessors to use for a one time
> project. About 2-3 units will be produced. A good software library and a
> solid product are more important than volume pricing.
>
> - Remo...GNU LD fails to generate correct ARM Thumb veneer
adsouzp - 11:52 07-07-08
good day people:
i have been using GNUARM/Cygwin for some time now and i have not
encountered a problem like this before.
BACKGROUND
- target MCU is STR71x
- CPU core is ARM7TDMI
- toolchain is GNUARM 4.1.1 on Cygwin
- source code
- the first file to be linked is an ARM assembly .s fil...Orthogonal matrix PS/2 kbd controller, low-power?
msg - 10:46 07-07-08
I need to make a wearable PS/2 keyboard (one-off) and would like
some input to help me decide between some inconvenient alternatives.
The device needs to be small enough to wear comfortably strapped to
an arm, have keys with positive action and not too closely spaced
so as to require a stylus to...Embedded processor selection for long-life product
tns1 - 02:15 06-07-08
I am faced with selecting a replacement processor/uC for a re-design of
some industrial controller/safety equipment. The technical requirements
can be satisfied by just about any 32bit risc style uP/uC, but one key
requirement is that since the product life is decades long, the
particular pa...Re: Can You Guess Which Micro This Is?
linnix - 22:30 04-07-08
On Jul 4, 8:17 pm, donald wrote:
> Scott in SoCal wrote:
> > I just bought a small embedded device (an iPod adapter for a car
> > stereo). Being the inquisitive type, I popped open the case to see
> > what the board inside looked like. I immediately noticed that several
> > of the c...Faster than TI C2000?
Chris Carlen - 19:16 02-07-08
Hi:
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.
Is it likely that there will b...config for USB peripheral mode device
Dennis - 23:44 30-06-08
I am running 2.6.18 on a ARM board and I have a USB OTG device that I
only need to run as a USB peripheral, not as a host USB device.
I am having some problem getting it to work. Can someone see my config
if it looks OK?
Also I need to run usbnet on my FC5 laptop. I did a modprobe usbnet
an...Re: a PC Based Oscilloscope?
msg - 01:19 26-06-08
CBFalconer wrote:
> "Alex.Louie" wrote:
>
> > CBFalconer wrote:
> >
> > > Talal Itani wrote:
> > >
> > >
> > > > I am sorry, I did not understand what you are telling me.
> > >
> > > Please do not remove attributions. Those are the initial lines
> > > that say "Whozit wrote"....AT91SAM7: C-startup
Roman Mashak - 19:40 23-06-08
Hello,
I'm trying to understand the mechanism of remapping on AT91SAM7 chips and
it's concerned the ARM assembly language. Basically what I wish to perceive
is the way C-startup is implemented. As far as I understand, it strongly
depends on a board involved and purpose of the firmware.
B...AT91SAM7: C-startup
Roman Mashak - 16:08 22-06-08
Hello,
I'm trying to understand the mechanism of remapping on AT91SAM7 chips and
it's concerned the ARM assembly language. Basically what I wish to perceive
is the way C-startup is implemented. As far as I understand, it strongly
depends on a board involved and purpose of the firmware.
B...Re: ckt for 8031 using 28c256(ROM) and 6264(RAM)
MK - 03:37 20-06-08
"arslan" wrote in message
news:N8CdnT7xWMxQsMbVnZ2dnUVZ_v7inZ2d@giganews.com...
> I am currently working on developing a 8031 based microcontroller system. I
> am using 8031 x2, 28c256 and 6264. I am having some trouble making the ckt
> can any body provide me with a ckt.
It might hel...How do I get 'gettext' in a embedded Linux target?
Steven Woody - 21:42 19-06-08
Hi,
We are developing ARM/LInux applications and our program is using
uclibc. The code which use 'gettext' as well as the Native-Language-
Support can not linked and run until we copy a libintl.so to the cross-
compilation enviroment and to the target. After that, however, even
though the c...Related to VXWORKS
A.P.Sundar - 07:07 19-06-08
1. Is there any free RTOS available which can be ported to ARM 7 and 9
controllers.
2. Can Vxworks be ported to VIA processors?.
Sundar.
...Re: embedded system development environment
Freelance Embedded Systems Engineer - 19:20 18-06-08
guoliangqian@gmail.com wrote:
> On Jun 18, 3:14 pm, "vinnie" wrote:
> > > Hi All,
> > > I am new to embedded system development and need your advice on my
> > > upcoming project. I thank and appreciate your help in advance.
> > > I'd like to setup a development environment that include...Re: at91sam7: garbage on DBGU output
Roman Mashak - 18:38 18-06-08
Hello, Ulf!
You wrote on Tue, 17 Jun 2008 06:19:43 +0200:
US> Looks like a Linker problem to me.
US> The program is linked to one place, but you are executing in another
US> place, so position independent code will execute, but data (the string)
US> is read from another location.
...Difference between ARM9 and ARM11
zaheer031 - 09:26 18-06-08
Can anyone tell me the differences between the ARM9 and ARM11 specifically
the L1 and L2 cache sizes in the two
...Re: Please suggest USB to RS232 adapter that works 100% [ FTDI rocks... and tunnels a serial port through USB ]
Mel - 21:10 13-06-08
James Beck wrote:
> The only BIG problem I have ever had was the fact that most of the
> adapters we tested had some strange glitches occurring on the outputs at
> very consistent intervals. Like 50KHz and ~100KHz on two I recall. I
> presume this was some artifact introduced by the chipse...Re: Commercial Embedded Linux Vendors
andrew queisser - 15:17 11-06-08
"The Real Andy" wrote in message
news:mp9v44db3sqanjlakga245api79j9c6es7@4ax.com...
> I am trying hard to avoid embedded stuff these days, but potential
> contract has come my way recently that needs some embeeded stuff. So
> whilst I am nutting out requirements I also need to put though...Re: Adding USB Interface to Low-Cost 8-Bit Microcontroller
Spehro Pefhany - 10:44 10-06-08
On Mon, 9 Jun 2008 21:13:19 -0400, "David T. Ashley"
wrote:
> Hi,
>
> I work for a company that produces low-cost consumer electronics that use
> 8-bit microcontrollers. These have the standard 8-bit whistles, like SPI,
> SCI, etc.
>
> We've kicked around the idea of allowing custo...Programming AVR from ARM using CAN Bus interface
pidy - 06:20 09-06-08
Hello to all,
I'm looking since many days something about my problem without find
nothing interesting so I'm going to post it.
I have a system of 4 different closed boxes: the Main box based on an
Linux ARM9 processor with a static IP and the A, B and C boxes each one
based on an AT90CAN128 mi...Newbie questions on ARM
08:54 08-06-08
I've never used ARM microprocessors, so i have questions about. For
now, i have only used 8 bit micropoccessors and i have programmed only
in C and asm language (i'm not expert in object oriented programming).
I shoud use an ARM7 microprocessor.
1)What is the best ide for software development?An...Re: Development tools comments
Not Really Me - 10:17 05-06-08
wrote in message
news:6cc6066d-1f23-4267-9911-628d5079c402@k13g2000hse.googlegroups.com...
> Hi Experts,
>
> Let me start by providing some background.
>
> We have designed an ASIC: 8051 + non standard peripherals (timers etc)
> + FLASH + RF frontent for a product used in wireless...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: ideas for a BASIC compiler
42Bastian Schick - 07:04 02-06-08
On Mon, 2 Jun 2008 00:42:24 +0200, Frank Buss
wrote:
> I've started a BASIC compiler, first for PICs, but later I plan to use this
> for ARM platforms, too. This is an example source code:
Why go for a compiler. The advantage of BASIC has been the trial'n
error learning with an interpret...