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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 878 threads matching "mcu"
You are looking at page 1 of 22.
The most relevant threads are listed first
Re: Superscalar embedded processors?
vinnie - 2009-11-19 15:19:00
> Hi all,
>
> Until now, I thought that superscalar processor design is only of
> interest for the desktop computer. However, since more and more
> transistors can be packed on the same die, I am wondering if
> there are now already the first superscalar processors available
> for the embedd...
Re: Software real time clock using timer unit
Didi - 2009-11-09 22:36:00
On Nov 10, 5:16=A0am, Vladimir Vassilevsky wrote:
> Didi wrote:
> > two 32 bit register accessing a 64 bit free running
> > counter. The way to do it is simple: read the MS-part, then read the
> > LS part, then the MS again; if the two MS reads differ, repeat.
>
> Problem with cycl...Re: Number of Microprocessors in embedded devices
42Bastian Schick - 2009-11-04 11:46:00
On Wed, 04 Nov 2009 14:14:06 +0000, Mike Fletcher
wrote:
> This is more a marking question but I am wondering if there is somewhere
> an "official" figure that tells how many of the produced microprocessors
> are employed in embedded devices and how many in desktop machines?
Not that...Re: Micro to drive a TFT LCD
-vinnie- - 2009-10-26 10:49:47
On Oct 23, 8:18=A0am, "Raddix"
wrote:
> I am looking to drive a 3.5" tft display similar to the one used in the
> following protoboard.
>
> http://olimex.com/dev/lpc-2478stk.html
>
> We were considering using the lpc2478 for awhile with its dedicated lcd
> controller. But I was looki...Re: Where to rent logic analyzer near Toronto, Canada?
Mel - 2009-10-24 19:06:00
Paul E Bennett wrote:
> Firstly, you didn't say which LCD module and EEPROM. Doing so might have
> got a wider response already.
I hate to damn a manufacturer with problems that are probably my own -- see
below.
> Secondly, Logic Analysers are expensive to own and hire so doing the job
...Re: Statechart tool to generate C
ql - 2009-10-24 11:53:00
Since this forum mentions my book ("Practical Statecharts in C/C++")
and the website (www.state-machine.com), I'd like to clarify some
misconceptions about state machines, UML, and tools.
For starters, I'd recommend reading a few articles about modern state
machines in embedded systems (see al...Re: Microcontroller Recommendations for School Project: Laser Tag
larwe - 2009-10-22 11:48:00
On Oct 22, 11:36=A0am, "Not Really Me"
wrote:
> > microcontrollers/components for this project I would appreciate it
> > very much! Thanks.
>
> Look at TI MSP430. =A0Lot's of low power stuff and I think they have one =
with
> ZigBee support.
But he doesn't really want to design...Re: First step into Secure Embedded system
Arlet - 2009-10-22 03:54:00
On Thu, 22 Oct 2009 00:38:05 -0700, ajaybgr wrote:
> - I have a Main program running on a PIC18(can be any MC)
> - Apart from that I have another PIC16(can be any MC) with some amount
> of non-volatile memory.
> - a variable "Counter" is stored on the non-volatile memory ie PIC16
> side
...Re: M25P32 failure
dalai lamah - 2009-10-21 14:44:00
Un bel giorno Vladimir Vassilevsky digitò:
> We are using M25P32 flash memory in one of the projects. It is used as
> a boot memory; normally, it is written only once or twice. However,
> there is a significant percent of failures; almost 25% of parts quit
> working after several week...Re: Anyone know of a micro w/ these features?
dalai lamah - 2009-10-21 14:44:00
Un bel giorno dawydiuk digitò:
> -CAN bus
> -16 GPIO
> -8 ch 12-14 bit resolution ADC
> -Low cost
If you can get 10 real bits from a MCU's internal ADC (even the ones
specified as 12 or 14 bits), you can congratulate with yourself.
If 10 bits are enough, Luminary has some parts with...Re: Please tell me what is the cheapest ARM with my request ip(100K annual)
rickee - 2009-10-13 21:00:00
> On Oct 12, 2:41=A0am, "rickee" wrote:
> > Requirement for our Audio system:
> > MP3 decode/WMA decode
> > CD/MP3 CD/WMA CD decode including servo control (it should be DSP)
> > USB/SD interface
> > rich interface just like UART/IIC/GPIO for our externtion.
>
> Why do you need arm ...Re: Developing/compiling software
Chris H - 2009-09-20 11:11:00
In message , David Brown
writes
> Chris H wrote:
> I don't want to go into the pros and cons of SDCC in this thread
> (unless the OP goes there) - I don't know the specifics of the tools,
> so it would end up in yet another generic argument about the advantages
> and disadvantages of expe...ARM: JTAG problem on developed ARM board
Mad I.D. - 2009-09-18 04:43:00
Hi.
I designed an ARM7 board with LPC2478 MCU. Unfortunately, JTAG doesn't
work like one would expect.
I can download code to FLASH, I can start debugging, BUT every time it
comes to the first STR instruction I get "Could not stop device"
ERROR. When I don't step the code it goes to some garb...Re: Selection of Microcontroller
vorange - 2009-09-15 00:17:00
On Sep 12, 5:27=A0am, Ulf Samuelsson wrote:
>
> The AT91SAM9260 has two USB host ports, but full speed.
> The AT91SAM9G45 has two USB high speed host port.
I too was looking for an mcu that could support high speed host.
I looked at the 9260 but it was full speed only.
I looked at the ...Re: How to read SPI data with FTDI chip FT232R?
Sven - 2009-09-10 16:43:00
Hello again
I have solved the problem. I used the FT_GetStatus() right after calling
FT_Write(). That way FT_GetStatus() sayed I had 0 bytes to receive. Now I
simply call FT_Read() after FT_Write() and let it wait for the same amount
of data to read as i wrote. And I also got a lot of junk ...Re: 16-bit SPI trying to read from 22-clock cycle ADC
MK - 2009-09-08 11:04:00
"Bill" wrote in message
news:5gnca5d000ql2jlabkd42od9tv1mcgr9b0@4ax.com...
> Hi,
>
> I'm trying to pull out data from the ADS8320 (a 16-bit ADC by Analog
> Devices. See bottom of page 10 in
> http://focus.ti.com/lit/ds/symlink/ads8320.pdf ) using the SPI in an
> AT91SAM7S256. The ...Re: Wants an update on ARM compilers
Chris Burrows - 2009-09-01 20:03:00
"Johnson" wrote in message
news:h7jenm$1gbq$2@adenine.netfront.net...
> Could anybody please show me a list of popular ARM compilers and their
> approximate costs?
Armaide is a complete integrated development system which includes a
compiler and linker for an ARM7 compiler for the Obe...Re: TFT LCD controller
larwe - 2009-08-07 12:24:00
On Aug 7, 10:41=A0am, news.tin.it wrote:
> I need some idea to realize a structure like this:
> =A0 =A0 MCU LCD CONTROLLER TFT LCD
Have you considered an FPGA solution?
...Re: Most powerful microcontroller in a DIP package?
RevAaron - 2009-08-04 11:55:00
Apologies for the necromancy, but what the hell!
> What are the biggest flash microcontrollers available in a DIP format
> in terms of mips, flash size, and ram size? This is for a small
> quantity of devices built on prototype boards.
Have you looked at Parallax's Propeller? No clue if it's...Need architecture for usb to usb bridge
ubrida - 2009-07-24 16:23:00
I need to build a custom usb to usb bridge. At a high level it is like a
one port hub with custom logic in the middle. So I need 2 usb ports, one
host and one device, and a programable MCU. It needs to support Mass
Storage Devices at USB 2.0 Hi-Speed (480 mbps). I am hoping to use vendor
librari...Re: RS485 - MODBUS or PROFIBUS or ....
bob - 2009-07-24 15:28:00
On Thu, 23 Jul 2009 22:49:22 +0300, Paul Keinanen
wrote:
> On Thu, 23 Jul 2009 19:06:32 +0100, Paul Carpenter
> wrote:
>
> > In article ,
> > nospam@nowhere.com says...
> > >
> > >
> > > Paul Carpenter wrote:
> > >
> > >
> > > > Until someone later wants to monitor...Re: RS485 - MODBUS or PROFIBUS or ....
Vladimir Vassilevsky - 2009-07-23 13:34:00
Paul Carpenter wrote:
> Until someone later wants to monitor what is happening and connects
> a TRUE RS232 device and blows your circuits.
Paul,
I agree that the TTL level signaling is not correct RS-232. However it
works just fine with the true RS-232 transceivers. It is handy t...Re: LWIP+UCOS on MCB2300
ql - 2009-07-23 10:08:00
You can check the recent port of lwIP 1.3.0 to the open source QP RTOS-
like state-machine framework available at . This web-page provides a complete example of DHCP, AUTOIP, UDP,
and an advanced web server with Server-Side Includes (SSI) and Common
Gateway Interface (CGI) capabilities. An exte...Re: High Speed USB Host
An Schwob in USA - 2009-07-19 21:16:00
On Jul 17, 12:10=A0pm, "cwillia"
wrote:
> I'm trying to find a micro controller that supports High Speed USB Host
> capabilities and also has at least 4 A/Ds on board as well. Any one know =
of
> something like this?
The LPC314x should pretty much be exactly what you are looking for. I...Good ZigBee Dev Starter Kit Recommendation Help
Gadi - 2009-07-14 14:42:00
Greetings,
I am looking to get started developing a short range low power device
that will consist of a controller and a device with a motor and
sensors. I would like to use ZigBee as the wireless technology
solution to connect the controller to the device. It meets the price
point and range ...Re: Hi-Tech Software bought by Microchip - no more other compilers
Mike Harrison - 2009-07-09 03:39:00
On Thu, 09 Jul 2009 04:55:11 +0100, Nobody wrote:
> On Thu, 09 Jul 2009 09:57:45 +0800, who where wrote:
>
> > > I'm not expecting them to give away the Hi-Tech product for free.
> >
> > (snip)
> >
> > Why not?
>
> Because they charge $500 for C18, and the Hi-Tech compiler is s...Re: LPC21xx IAP erase time too long
An Schwob in USA - 2009-07-04 01:46:00
On Jul 1, 11:12=A0am, ih8s...@yahoo.com wrote:
> On Jul 1, 2:59=A0pm, George Neuner wrote:> Can you=
read it back with no errors?
>
> Yes.
Don't count on it for a long time as you are violating the spec!
> > That you may be violating the specs of the flash memory chip. =A0The
> ...SD card problem!
Tech350 - 2009-06-30 09:54:00
Hello all,
I'm new to this site and this is my first post. I have started a SD card
project where I want to interface the SD card with my MCU. I am using a
PIC18F8520 MCU. Well before I started working with the SD, I worked on the
DAC module successfully (I mentioned this because DAC uses SPI
com...Re: New Atmel Cortex M3 runs at 96MHz, has high-speed USB
An Schwob in USA - 2009-06-25 01:17:00
On Jun 20, 11:37=A0am, "FreeRTOS.org" wrote:
......
> > Why are they calling it 'Atmel Cortex M3' when it's an 'ARM Cortex M3'?
>
> Licensed from ARM, made by Atmel.
>
> These microcontroller.com threads always seem to appear two weeks after t=
he
> parts are originally mentioned.
...Re: New to USB, Is this possible?
Sivart - 2009-06-15 10:06:00
> On Jun 13, 11:06 am, Mel wrote:
>
> > On a Linux system with a kernel 2.6 or later, or on a BSD system, it
ought
> > to be possible to write udev rules to trigger your choice of actions
when a
> > USB device is found.
>
> Good point. Of course you could argue that this constitutes w...Re: PLC PAC operating system
42Bastian Schick - 2009-05-31 15:52:00
On Sun, 31 May 2009 21:13:29 +0300, Paul Keinanen
wrote:
> > And I am pretty sure, they use some kind of RTOS inside.
>
> If I had to design a safety critical system, I would avoid any
> complexity as much as possible, this means getting rid of any RTOS.
I am biased but I think using a...AT89C51RD2: 64k or 62k flash?
aleksa - 2009-05-31 04:26:00
AT89C51RD2 has 64k flash + 2k ROM.
Can I use all 64k with:
1. FLIP
2. API
or do FLASH and ROM overlap?
My MCU hasn't arrived yet, so I can't check this.
TIA
...Re: Availability of 8751
Scanman - 2009-05-15 15:48:00
> Scanman wrote:
> > I am trying to determine the availabilty of parts on an old design.
> >
> > It uses 8751H, 8255 and 8254. All are DIP packages.
> >
> > Can I still by these parts, or should I look for functional
repalcements?
> >
> > If I did go with a different Micro cont. w...Re: Generating sound at microcontroller pin using pwm
Frank Buss - 2009-05-13 22:59:00
Rohit wrote:
> I am working on a hobby project to generate sound effects with 89c2051
> using PWM. I am able to generate keyboard notes with it by generating
> pwm signals of different frequencies. But I am at loss as how to
> generate
> other effects like car crashing,bird chirping,mach...Re: Searching SBC/DSP board/microcontroller; 4ADC/1kHz/USB Host
Yoreki - 2009-05-13 14:45:00
First of all, sorry for not replying for so long. I was having trouble
logging into the website, and it took a little while to get it sorted out
with the webmaster.
I had meant to reply the day you guys posted, but as I said couldn't.
I've been able to find a solution or two in the meantime:
...Re: LCD CGRAM
Cyberstein - 2009-05-05 15:18:00
> Hi,
>
> I have to use a 16x2 LCD character module, based on the Hitachi 77480
> controller.
>
> I need to display 21 custom symbols which are not included in the ROM
> so, my only chance is to use the CGRAM. The CGRAM, though, allows the
> user to create up to 8 custom symbols therefore i...Re: How to match 2 same analog waveforms with time delay?
Joe G (Home) - 2009-04-26 10:19:00
"Joe G (Home)" wrote in message
news:49f402df$0$2602$afc38c87@news.optusnet.com.au...
> "cell" wrote in message
> news:2751397a-58fc-4c7f-bd7f-9100ae8bca85@z16g2000prd.googlegroups.com...
> > Dear all,
> >
> > I want to use MCU to calculate the delay between 2 almost same analog...Re: What does an embedded beginner need to know?
Chris H - 2009-04-24 03:32:00
In message , Dave Nadler writes
> On Apr 21, 7:26 pm, Mike Silva wrote:
> > I've been asked to write a tutorial to introduce people who have had a
> > bit of programming experience to embedded hardware and software. I
> > can think of plenty of material for such a tutorial, but I don...Re: zigbee to ip bridge
ashu - 2009-04-23 08:43:00
On Apr 22, 4:54=A0pm, Grant Edwards wrote:
> On 2009-04-22, 1swaroopa5 wrote:
>
> > Hii...
>
> > =A0 =A0I need to implement zigbee to IP bridge..this module is to be de=
veloped
> > in computer..IP Stack is already avaliable in linux..but I couldn't fin=
d
> > any resources...Re: SPCI Parser
Anton Erasmus - 2009-04-22 04:17:00
On Sat, 18 Apr 2009 12:50:59 -0700 (PDT), "noone@nowhere.undef"
wrote:
> Hello,
>
> I'm looking for an open source SPCI parser to put in a microcontroller
> project (ATMEL AVR)
> I'd like to communicate with this device using a USB com (using a FTDI
> FT232)
> I see on
> http://compil...