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Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 778 threads matching "mcu"
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Re: libjpeg + cortex m3
Wilco Dijkstra - 15:43 01-10-08
"Ulf Samuelsson" wrote in message news:gc06um$n9r$1@aioe.org...
>
> "michwolo" skrev i meddelandet news:QcydncfiCdMPTH_VnZ2dnUVZ_vjinZ2d@giganews.com...
> > Hello
> > Does anyone make cross compile libjpeg to cortex m3 core. I trying but
> > have a question. arm-elf-gcc or arm-none...
Re: Atmel
Peter Keller - 17:19 23-09-08
FreeRTOS.org wrote:
> Well you don't need any hardware at all to start with as the free AVRStudio
> has a good simulator.
It is good to know there is a good simulator, but I'll probably start
with the blinking LED on a real piece of hardware to get the development
pipeline down.
> W...Re: 32-Bit Microcontroller for New Project
vinnie - 10:46 08-09-08
> I'm about to embark on a new project that will require a 32-bit
> microcontroller. I've spent the last month evaluating the merits of
> the various choices architecturely, and have a pretty good idea of
> what's out there. It's come down to development environments, and I'd
> like to get some ...Re: Used interrupts on both 68k & PIC, want 68k w/onboard memory & JTAG/BDM
Didi - 08:43 05-09-08
On Sep 5, 1:47=A0pm, 2Penny wrote:
> =A0 =A0 =A0Gentlemen -
>
> =A0 =A0 =A0The subject line says it all. =A0I've just started looking
> =A0 =A0 =A0around for a 68k-ish creature with some PIC-like features
> =A0 =A0 =A0that might have popped up recently. =A0Has anyone here seen
> =A0 =...Re: Problem running the example
Marcus Harnisch - 08:12 03-09-08
"Boudewijn Dijkstra" writes:
> The simulator only simulates an ARM core, not a whole microcontroller.
Depends on your environment. RealView MDK, for instance, simulates
entire MCUs. Even if the OP was using RVISS (formerly known as
"Armulator"), there would be some generic peripheral model...Re: handling interrupts
James Beck - 11:39 02-09-08
In article ,
chinnari_dasari@yahoo.co.in says...
> how exactly are the interrupts get served in the real time embedded
> products like a washing machine,refrigirator?
>
> is it like, we will write a program where we continuously check a
> particular status bit of the device has been s...Re: (New York) Trade ARM9 EVBs for ARM7
larwe - 18:39 01-09-08
On Aug 28, 11:33=A0pm, linnix wrote:
> If you can live with 8 bits Atmega169, I can get you one with
> accelerometer (8 pins CLCC) and a 3 digits LCD. =A0It has both SPI and
I have several thousand scrap PCBs with an MSP430 and an ADXL322.
Unfortunately I need more flash and a much fast...Re: declaring an array in embedded C
Chris H - 03:32 21-08-08
In message
,
satish writes
> hi iam new to this embedded field iam had a problem in declaring an
> array in embedded C.
No such thing as "embedded C" just C. You declare an array as you would
in C
> .iam using SDCC compiler for compilation.
That is your main problem.
What i...I need 1 USB to many RS232 Convertor?
=?ISO-8859-1?B?9m1lcmthcmFr/Of8aw==?= - 15:35 06-08-08
I've an embedded system with Linux running on an ARM9 MCU and i need
to design an interface card to communicate with cards like 7816 smart
cards. I can only use USB interface of the system and i can
communicate with cards via rs232 protocol. do you have any idea to
convert USB port of this sytem...Best solution to count RPM
N1 - 09:16 04-08-08
I'm working on a data acquisition system for byke/car engine.
I'm trying to figure out which would be the best way to count RPM and
I've thought to two different ways:
1- using an interrupt routine attached to a digital input to count, say,
10 revolution and then look how much time passed betw...Re: New Yahoo Group for Blackfin DSP/MCU
00:48 03-08-08
In article , Vladimir Vassilevsky wrote:
>
> problems@gmail wrote:
> > Vladimir Vassilevsky wrote:
> >
> > > I've been doing the designs with Blackfin since 2003 and still do,
> > > and I can tell you that Blackfin is same as crap as all other MCUs
> > > and CPUs.
> >
> >...Re: raisonance plus Rlink - any issues?
Anton Erasmus - 17:09 01-08-08
On Thu, 31 Jul 2008 23:19:11 +0100, Peter Harrison
wrote:
> I am still trying to sort out a set of tools for the STM32 (and possibly
> other ARM processors). I know there have been several discussions on
> here. I have very little money as I am essentially a hobby user.
>
> Raisonance ...Procyon Library for Atmel AVR MCU - =?ISO-8859-15?Q?I=B2C?= problems
=?ISO-8859-15?Q?R=FCdiger?= Leibrandt - 11:16 30-07-08
Hello!
I am new to programming and am struck with the Manual for the Procyon
Library for Atmel's ATMega MCUs. It basically provides functions for all
the interfaces and functions available on the Atmel MCUs.
Problem is as follows:
I have a Thermopile array sensor - TPA81 (
http://www.robo...Re: Displaying real-time data through LCD
Paul Carpenter - 05:14 30-07-08
In article ,
adrian_figui@yahoo.com says...
> Hi,
>
> As of now, I can display text through a 4x20 LCD ("Hello World!").
> However, I need to display real-time data which is computed every 2secs.
>
> In the sample codes that I have seen (and have used), the character is
> sent on...Re: LCD display Busy Flag
sani_figs - 08:19 29-07-08
Hi,
I need to use a 4x20 lcd but it's my first time to use suce a device. Can
you suggest any online material that I can read so that I can implement the
LCD display on my project? I'm using a zilog mcu and I have enough pins for
all the pins of the lcd.
Thanks!
...How to use a 4x20 lcd.
sani_figs - 08:14 29-07-08
Hi,
I need to use an lcd display for my project and what we have here is a
4x20 lcd. However, I can't find any starters's guide for using such device.
Btw, I'm using a zilog mcu and I have enough I/O pins for all the pins of
the lcd. It's better if your reference or sample code is in zilog syntax...Re: Cheapest USB microcontroller?
rickman - 10:52 22-07-08
Your need for EEPROM narrows the field considerably. Flash is nearly
universal in MCUs, but EEPROM is much less common. Is this actually
required? Can it be added externally? I expect it is a cost issue,
but you need to compare MCU with EEPROM cost vs. MCU + EEPROM cost.
You may be able to d...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...GPS receiver question
vorange - 02:43 21-07-08
I'm looking for an easy to use/integrate gps receiver.
I've come across tyco's products.
Is one of these babies all I would need or is there some 'antenna' or
other stuff required that's not shown in the picture?
I plan to hook it up to an MCU.
http://www.tycoelectronics.com/gps/modules...Re: Alternate supplier for dallas/microchip 1-wire memories
rickman - 17:47 18-07-08
On Jul 18, 11:20 am, Stef
wrote:
> For production of measurement probes, we need to store calibration data
> on them. Because of the limited number of connections, the 1-wire
> memories look like good candidates. For now we need at least 16kbit of
> storage which should be eprom or eepro...Re: AVR, polling INT0 IRQ bit - help?
larwe - 17:22 13-07-08
On Jul 13, 4:57=A0pm, "John B"
wrote:
> Set DDRB bit 7
Set? That makes it an output.
> Set PORTB bit 7 to enable the internal pull-up on PB7
> Clear the PUD bit in MCUCR to enable internal pull-ups globally
> Set PCMSK1 bit 7 (PCINT15 bit)
> Set EIMSK bit 7 (PCIE1 bit)
> Clear...Re: 3X4 KEY PAD INTERFACE
Andrew Smallshaw - 11:46 09-07-08
On 2008-07-09, dk wrote:
>
> I am looking for a 3x4 keypad interface with only 6 i/o lines of a uc.
> I would like to use interrupt on chage as well to wake from sleep.
Are you looking for a preassembled module or to make something from
scratch? Do you need to handle multiple keypresse...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...Re: Embedded processor selection for long-life product
Anton Erasmus - 12:20 06-07-08
On Sun, 06 Jul 2008 07:38:09 -0500, Vladimir Vassilevsky
wrote:
>
>
> tns1 wrote:
> > 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 ri...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: Wireless cables replacement technology?
Hauke D - 17:48 26-06-08
On Jun 26, 4:55=A0pm, Neil Cherry wrote:
> I'm looking for a solution for wireless cable replacement. Basically I
> would like to have some wireless technology that replaces cables from
> point A to point b-z. I'm thinking about more than one RS232 cable and
> I'll need to figure out the ...Hardware before SPI interfacing
sani_figs - 01:59 21-06-08
Hi, I will connect my ADE7758(metering IC) to a Z8 Encore! MCU through SPI
(4pins: SCK,MISO,MOSI,CS). My problem is, although the input and output
voltage ratings of the two chips match(5-6Volts input and output), I feel
that there should be some hardware in between, meaning, I should not
DIRECTLY c...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: Sound chip manufacturer...
vinnie - 10:02 19-06-08
> I have a project that will incorporate pre-recorded sounds. Something
like
> nature sounds; ocean waves, birds, etc. Does anyone have any leads as to
a
> manufacturer that might supply such an item. I've posted some requests
to
> alibaba.com but have had no responses yet. Obviously the desired ...Re: a race car system development
Ulf Samuelsson - 03:03 19-06-08
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.Telemetry system
> 4.Eletronic control unit ...Re: at91sam7: garbage on DBGU output
Ulf Samuelsson - 00:19 17-06-08
Roman Mashak wrote:
> Hello,
>
> MCU - at91sam7s64
> toolchain - Yagarto (based on gcc-4.2.1)
>
> I have two distinct applications residing in the internal flash. The
> first one located at 0x100000, prints string and transfers control to
> the second application located at 0x104000,...Re: SCI Interrupt on freescale HCS12XDP512 - CodeWarrior + ProcessorExpert
BWallace - 12:27 13-06-08
> Hey Folks,
>
> Right now i'm trying to fix a problem i got with an Interrupt Service
> Routine created by ProcessorExpert and CodeWarrior:
>
> The ISR loses received chars (as in not calling the appropriate Event
> Handler) when the reception of that char is finished while the
> transmit-...I have problems with SCI 2378
epanchana - 20:50 11-06-08
I have been programing an EDK2378, I did a simple program using SCI in
async mode, this program tx data from MCU to another computer throuhg pin
139 and 141 from edk to pc... via serial comm....(using null modem).
The program is upload and run into MCU, but when i goint to see the result
on anothe...Re: Help to get good ADC system design tutorial
Leon - 15:05 11-06-08
On 11 Jun, 09:13, Rohit wrote:
> Hi,
>
> Can anybody suggest a good tutorial on ADC. I have seen in many books
> but they just deal with interfacing to microcontrollers, not ADC in
> details. I would like to know more about how to select an ADC based on
> range of signal. How to scale...Re: build camera using cmos3088
Leon - 15:02 11-06-08
On 11 Jun, 14:50, yoge...@gmail.com wrote:
> On May 17, 7:03 am, "ysugand" wrote:
>
> > Hay, I have just purchase a cmos 3088 and planning to build my own camera
> > from it.
> > I am just wondering what are the others components that I need to purchase
> > to build the camera.
>...Connecting buttons with MSP430F2013 for Input Output with software
anmol - 13:59 09-06-08
Hi!
I want to connect 5 buttons with the MSP430F2013 MCU . I want to use
the buttons for input with a software . Please help and tell me how
to go about the task . If you have any tutorial , curcuit diagrams ,
videos please give the download location or the url of the site .
Regards
Anmol
...Re: What Serial Link to use
Anton Erasmus - 11:40 09-06-08
On Mon, 09 Jun 2008 05:20:15 -0500, "Jalon"
wrote:
> Hi All,
>
> I am a novice in Embedded and looking for inputs on the Basic
> characteristics of serial protocols that will help me in deciding which
> protocol to use (SPI/SCI,I2C..... RS485, RS432).
>
> In other words i find easy t...Re: Driving tri-state LED matrix
rickman - 09:47 04-06-08
On May 30, 3:09 pm, Tom=E1s =D3 h=C9ilidhe wrote:
> On May 30, 7:42 pm, Tom=E1s =D3 h=C9ilidhe wrote:
>
> > Is there anyway I can get this to work... ? I'm thinking of using one
> > BJT and one FET, and also a pull-up/down resistor. I'll make up a
> > circuit and post a picture.
...Re: Any recommendations for audio player microcontrollers?
Joel - 08:56 02-06-08
> Hoi Wong wrote:
> >
> > Thanks for your inputs. The device that I'm building is a small
> > portable device (wrist-watch, belt, whatever) that gives out sound
> > effects (each 1~5 seconds, and a total of 8~256 clips) on user
> > command. For sound quality, I might need it to be better ...