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AVR
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 1173 threads matching "avr"
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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.
>
...
Re: computer-driven fans
Ron Ford - 21:40 21-07-08
On Mon, 21 Jul 2008 10:40:51 +0200, Frank Buss posted:
> Ron Ford wrote:
>
> > My question is what is the minumum cost of entry? I saw other numbers that
> > were ten times as much.
>
> I didn't tried it (I have some AVRs, but no time so far to try it), but
> looks like this is a ...Re: 32-bit Microcontroller for $1.00 -Guy Macon
Jim Granville - 15:45 21-07-08
Guy Macon wrote:
> 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.")
No sales numbers on t...CompactFlash write speed
A.D. - 13:59 18-07-08
Hi all!
I'm designing a high speed datalogger that should store
a continuous data stream (about 2MB/s) for about 30
minutes. I'm using a Compact Flash card to store data
samples (no FAT, just raw data with a continuous
addressing, in order to keep all as fast as possible).
The CF I tested is r...8951 / AVR controller circuits
CCD - 09:51 17-07-08
Hi,check out an AVR interfacing example and 400hzsignal generation
using 89c2051 microcontroller, here:
http://dharmanitech.blogspot.com
...Re: Simple C question...entering binary
Walter Banks - 11:06 15-07-08
David Brown wrote:
> Walter Banks wrote:
> > Most of the embedded people did something similar
> >
> > #define b00000000 0
> > #define b00000001 1
> > . . .
> >
> > before 0b....
> >
> > was implemented as an extension in most compilers including ours.
> >
> ...AVR, polling INT0 IRQ bit - help?
larwe - 14:27 10-07-08
I'm porting some old code that uses a pin-change interrupt flag as an
edge detector. The new target micro is an AVR (ATmega169). I'm having
real trouble getting the INT0 logic to work like I think it should.
I set DDRD = 0xe5 (INT0 is on bit 1 of port D), PORTD = 0x20, and
EICRA = EICRA | ISC...Timer ticks occurring much more faster
ratemonotonic - 12:04 09-07-08
Hi All ,
I am implementing RTC code on an AVR Atmega2560 I have a 32Khz clock
crystal to TSOSC1 which is used by timer2 in async mode. I have
configured the clock divide to 8 so the clock to the timer is 32768/8
= 4096. It is a 8bit so a interrupt should be generated every 16hz
(4096/256).
...Re: Can You Guess Which Micro This Is?
donald - 22:20 04-07-08
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 chips, including the microcontroller, have had their ...Re: Faster than TI C2000?
Vladimir Vassilevsky - 00:00 03-07-08
"CC" wrote in message
news:N4Wak.10936$cW3.9354@nlpi064.nbdc.sbc.com...
> Vladimir Vassilevsky wrote:
> >
> > 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 ...Re: 24 bit math on 8 bit micros
Ulf Samuelsson - 04:34 02-07-08
aamer wrote:
> Hi Friends,
>
> I was trying to figure out some solution for multiplication of 24bit
> data with a 24 bit data on 8 bit microprocessor.
>
> I got the idea like multiplying first bytes of both data and then the
> next bytes taking care of carries and finally put it in to ...Re: Best buy linux comp. CPU ??
MikeWhy - 10:27 01-07-08
"MMJ" wrote in message
news:4869e41c$0$56794$edfadb0f@dtext02.news.tele.dk...
> Hello all,
>
> I am doing some preliminariy research on finding a suitable embedded CPU
> for our next project on my workplace. The product of the product is in the
> 25k-50k range and somewhat costsensi...Re: Sleeping PICs Lie ? - WDT + GIE <> ISR but Just Resumes Main Code
John B - 11:49 25-06-08
On 25/06/2008 B1ackwater wrote:
> On 25 Jun 2008 11:02:23 GMT, "John B"
> wrote:
>
> > You need to decide whether you want the WDT or the interrupt to
> > wake up the processor. If it's the latter, then you must turn off
> > the WDT before putting the processor to sleep.
>
>...Re: How workable is Vista?
larwe - 21:04 24-06-08
David Brown wrote:
> I note your list of tested solutions is missing Virtual Box...
OK, I got home and did some testing... Not bad. Not bad at all. It
works [maybe a little slowly] with the TI hardware, which was instant
death to VMWare and Parallels. Works with the JTAG-ICE and AVRISP
mkI...Re: tiny inductor with every bypass cap?
Joel Koltner - 13:00 23-06-08
Hi Vladimar,
"Vladimir Vassilevsky" wrote in message
news:d5M7k.6300$cW3.2227@nlpi064.nbdc.sbc.com...
> Despite of the popular beliefs, many
> analog or digital designs can be built in two layers just fine. It takes
> care, understanding and attention to details.
For many companies,...Re: a PC Based Oscilloscope?
TheM - 07:28 23-06-08
> "Klaus Kragelund" wrote in message
> news:ced58b2f-8936-4078-9f59-> 63124fe908aa@x35g2000hsb.googlegroups.com...
>
> I have also used the PicoScopes. The update is not as the other poster
> says, I think I have like at least 50 times per second.( on a USB 1.0
> connection)
> That bein...How to reset an Atmel AT90CAN128 from software?
11:36 20-06-08
Hello all. I'm looking for a relatively clean way to code a software
reset for an AT90CAN128 or ATMEGA128 microcontroller using C code (or
C with assemby embedded) that will compile under the avr-gcc 3.4.6
compiler chain. Essentially, I want a function softReset() that I can
call from my progr...Re: a race car system development
Rich Webb - 10:05 18-06-08
On Wed, 18 Jun 2008 08:26:15 -0500, "saurabhneo23"
wrote:
> Our team is developing some electronic systems for a FORMULA STUDENT CAR
> competition held by SAE,the systems are:
> 1.Data aquisition system using CAN protocol and logging into USB
> 2.Automatic gear shifting system
> 3.Telemet...Re: Global Variables
David Brown - 16:24 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...Locked out of ATmega48
Hoi Wong - 23:43 15-06-08
I was trying to set my atmega48 to use internal 128kHz clock (CKSEL fuse)
through AVR studio but I guess I accidentally locked myself out from
programming the chip. I tried all ISP clock speed but had no luck with that.
Here's the screenshot:
http://www.stanford.edu/~wonghoi/atmega48lockout.pn...Re: Please suggest USB to RS232 adapter that works 100%
Simon Clubley - 12:45 13-06-08
In article , CBFalconer writes:
> CBFalconer wrote:
> >
> > Impossible. USB is not a serial port.
>
> I'm hearing some objections to my statement above. My point is
> that USB is a shared system, and that it queues up traffic for
> transmission at intervals. You can't use the...Re: Adding USB Interface to Low-Cost 8-Bit Microcontroller
Ulf Samuelsson - 18:36 11-06-08
"David T. Ashley" skrev i meddelandet
news:yaqdnfLQ1Z1-SNDVnZ2dnUVZ_orinZ2d@giganews.com...
> 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 ki...Re: Connecting buttons with MSP430F2013 for Input Output with software
=?ISO-8859-1?Q?Pertti_Kellom=E4ki?= - 02:39 11-06-08
Tim Wescott wrote:
> If you have enough undedicated pins, hook up one switch per pin (view
> with a fixed-width font):
[Schematics of pull-up resistor and switch]
Just an addition to Tim's post. I don't know about the MSP430F2013
specifically, but many microcontrollers already have the res...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...Re: DSP recomendation
Ulf Samuelsson - 14:39 03-06-08
> 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 someone put me on...Re: ideas for a BASIC compiler
TT_Man - 03:54 02-06-08
"AZ Nomad" wrote in message
news:slrng46u5v.pse.aznomad.3@ip70-176-155-130.ph.ph.cox.net...
> On Mon, 2 Jun 2008 06:23:31 +0200, Frank Buss wrote:
> > Robert Adsett wrote:
>
> > > Well if you *must* use basic :)
>
> > Usually I'm using C, but I think this would be too difficult f...Material Choice for Portable Sound Player
Hoi Wong - 03:44 01-06-08
Thanks for the comments to my post below. It seems like I wasn't clear about
the needs for the project when I ask for suggestions on component choice.
Instead of continuing the thread below, let me start fresh here.
I'm trying to build a portable, low power sound player that plays the
selec...Re: Programmer / Evaluation Board / Development Board
Robert Adsett - 20:16 31-05-08
In article , Tomás Ó hÉilidhe says...
> Are all of these the same thing?
No. Although the difference between a development board and an
evaluation board is at best fuzzy (and probably mostly in the minds of
the marketing department).
Some evaluation boards also act as programmers thou...Re: Newbie question: the essence of embedded world!!!
=?ISO-8859-1?Q?Pertti_Kellom=E4ki?= - 08:22 30-05-08
Akram wrote:
> Does writing firmware and embedded development include real programming
> challenges? such as algorithmic thinking , maths ? or it is more about
> electronic engineering ?
The short answer is yes. Embedded development includes anything
form doorbells that make funny noises ...Re: Voltage from high impedence? (Newbie)
David Brown - 10:46 28-05-08
Tomás Ó hÉilidhe wrote:
> On May 27, 9:28 pm, Frank-Christian Kruegel
> wrote:
>
> > For real projects you are wasting your time. Simply take a microcontroller
> > with enough pins. Its that easy.
>
>
> My Pickit1 can only program chips with up to 14 pins, otherwise I'd
> use...Re: what is your take on evaluation boards and dev kits?
Ulf Samuelsson - 16:11 27-05-08
"answers" skrev i meddelandet
news:l8qdnfLnofjWn6HVnZ2dnUVZ_gidnZ2d@giganews.com...
> Hi All,
>
> Please guide me in getting a ARM or other processor Development board with
> USB, SPI, UART, etc protocols, also board must be Linux portable.
>
> I am interested in carrying my hobby w...USB sniffer?
Martin Griffith - 18:07 20-05-08
I've left my luddite 8051 for a day or two with this AVR project
http://www.obdev.at/products/avrusb/hidkeys.html
Of course it doesn't work (yet), I built it!
Obdev provide a compiled hex file. for a 2313, is it code compatible
with a 8515?
Any suggestion on a free USB sniffer, I'm not ...Re: Looking for a tiny WAV player
donald - 23:20 19-05-08
Thanks to everyone who suggested circuits.
I have found that most mp3 player projects will also play wav files.
Many single board mp3 players with source code will allow me to add the
buttons to the project.
Now to get an AVR board for this project.
donald
...Re: Blank Piece of Paper: Bluetooth Controlled Motor
Joel - 09:27 14-05-08
> Greetings,
> Though I have an educational background in computer hardware and
> embedded systems I have never taken on a blank slate project on my
> own, and I am having trouble as to where to begin. After a few
> minutes lamenting the high cost of my education versus the actual real
> world...Re: adding USB Flash feature to existing product (Vinculum? experience?)
Rich Webb - 08:23 14-05-08
On Wed, 14 May 2008 10:01:11 +0100, "Peter Dickerson"
wrote:
> I'm looking into adding support for USB Flash sticks to a current design,
> perhaps even for retrofit. The product volumes are in the small thousands a
> year. The product has an expansion connector that has power, a few GPIOs...Re: My idea of fully-portable C code
Dave - 15:02 13-05-08
On May 12, 6:10 pm, Tom=E1s =D3 h=C9ilidhe wrote:
> I've been talking about portable C programming lately, and I've
> claimed that I write fully-portable code. Many people here contested
> this claim, some more rudely than others, so instead of trash-talking
> back and forth I'm going to ...Re: PMOS in parallel with NMOS
linnix - 14:18 11-05-08
> > Nothing "bad" happens. Also, the green LED's don't glow yellow.
>
> At this point, I am not as worried about the LEDs as I am the MCU.
I already fried some AVRs like this, driving three colors LEDs without
resistors. They shine very bright, but last very short (days).
> I am pretty...CCD Chips
}{ - 16:01 06-05-08
Apologies if this is the wrong place for this but here goes,
I have just finished reading/working my way through "programming and
customizing the AVR microcontroller" and one of the "ideas for projects"
listed in the back is a CCD camera controller. This very much appeals to me,
so I have d...Re: uC Slection for a learner project
Neil - 01:21 04-05-08
linnix wrote:
> On May 3, 11:41 am, Hans-Bernhard Bröker
> wrote:
> > AC Me wrote:
> > > I would like to construct a data logger. This data logger may be
> > > located in areas remote from power and human kind. It will read 1-Wire
> > > interfaced weather instruments at an interval of...migrating from 8051 to AVR!
ikalogic - 16:11 02-05-08
Hello,
I just want to announce to the community that my new tutorial about
migrating from 8051 to AVR microcontrollers is finally finished. I can see
that many users have asked for it, so here it is.
I just hope that i won't find those 15 pages stolen (copy/pasted) on
another website in two ...