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MCU
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We found 770 threads matching "mcu"
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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 ...FTDI2232D & SPI
Bill Davy - 04:40 30-05-08
I've been trying to get this working so far without success. I'm just
wondering if anyone else has. Our particular requirement is for the 2232 to
act as a master to a SiLab MCU acting as a slave. All transactions are
bytes. I've not got so far as worrying about CLKPOL or CLKPHA - right now...Re: M16C29 Beginner
Eric - 21:44 29-05-08
M16C BEGINNER 写道:
> Dear all
>
> I have recently acquired a Renesas M16C29 Starter kit. I was wondering
> if anyone could suggest some tutorials online or a book that is
> specifically aimed at M16C users.
>
> I would prefer to use C and not assembler as I already have some
> e...Re: Voltage from high impedence? (Newbie)
rickman - 21:20 28-05-08
On May 28, 2:35 pm, Tom=E1s =D3 h=C9ilidhe wrote:
> I find BJT transistors easy to understand because you can easily see
> what the base current is going to be, and it's the base current that
> decides whether it'll be "on" or "off".
I prefer BJTs for different reasons. I understand bot...Re: question about ARM
adsouzp - 01:14 26-05-08
hello:
> I have chose ARM series but currently there are two different models
as:
excellent choice.
1. ARM is, i think, the most popular CPU core right now,
used in iPod and in many mobile phones.
2. ARM has a very interesting design philosophy. its RISC
and also has conditional...How to determine .data LMA for ARM Flash program?
adsouzp - 01:06 26-05-08
hello all:
i am currently developing software for STR710 MCU.
for Flash-based ELF programs, i have avoided using a
linker script by using the -Ttext and -Tdata LD flags.
i did not like using a linker script because:
- its quite complicated
- i do not know which is the best linker script ...how to ISR code with lesser memory usage(Urgent)
lallisidhu - 08:02 17-05-08
Hi all,
Could anybody help me or guide me to write a better ISR code which uses
lesser memory and compiles smaller hex file.The problem I am facing is if I
use too many 'if else' conditions in my ISR the hex file compiles shoots to
18Kb whereas if i use one or two conditions only the hex file is ...Re: MPLAB IDE
Dan Henry - 19:31 15-05-08
On Thu, 15 May 2008 09:19:33 -0500, "aamer"
wrote:
> > > > > I just started writing small applications in MPLAB IDE for PIC16F
> micro
> > > > > controllers. I tried to save the .C file (one of source files) into
> I used C18 Toolsuite and now its working.
Your PIC16F MCU is running ...Re: Best way to get 2.5 volts from somewhere? (Vcc = 5 volts)
Andrew Smallshaw - 05:52 15-05-08
On 2008-05-13, Tom\xe1s \xd3 h\xc9ilidhe wrote:
> A friend of mine suggested to me today to connect one of the LED pins
> to the microcontroller, and the other to 2.5 V. That way, if the uC
> pin is high, it will source current from 5 volts to 2.5 volts. If it's
> low, it will source cu...