Sign in
Search Comp.Arch.Embedded
embedded by Keywords
68HC11 | 68HC12 | 8051 | 8052 | ARM | ARM7 | Asic | AT91 | AT91RM9200 | Atmel | AVR | AVRStudio | Bootloader | CFP | CompactFlash | Cygnal | Cypress | Dataflash | DSP | eCos | EEPROM | Embedded Linux | Emulator | Endian | Ethernet | Firewire | FPGA | Freescale | GCC | GNUARM | GSM | H8 | HDLC | I2C | Infineon | Interrupts | Java | JTAG | LCD | LED | LPC2000 | MCU | Microchip | MMC | MPLAB | MSP430 | PC104 | PCB | PCI | PCMCIA | PowerPC | Rabbit | RS232 | RS485 | RTOS | SBC | SDRAM | Sensor | SPI | STK500 | UART | UML | USART | USB | Verilog | VHDL | VxWorks | Xilinx
Discussion Groups
SPI
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 1081 threads matching "spi"
You are looking at page 1 of 28.
The most relevant threads are listed first
Re: 32-bit Microcontroller for $1.00
CBFalconer - 20:16 23-07-08
Wilco Dijkstra wrote:
> "Jim Granville" wrote:
>
... snip ...
>
> > It does make very sound sense, when a customer demands it!
> > Automotive customers DO have clout :)
>
> Some may want it but it is hardly as important as you're trying
> to spin it. The fact is there are virtua...
Re: Finding power - gnd shorts
rickman - 12:50 23-07-08
On Jul 23, 11:51 am, CBFalconer wrote:
> Paul Keinanen wrote:
> > Didi wrote:
>
> > > Yes, that's a clear advantage of the 110V (one can expect twice
> > > the current at 220 is needed to blow the fuses), but 220 is still
> > > more fun for this application - sparkles, smoke, ...Re: Micro-SD card initialisation-problem
Mark Borgerson - 00:52 18-07-08
In article ,
address@not.available says...
> Hello all,
>
> I've connected a Micro-SD card to my printerport (using very simple 5v to
> 3v voltage-step-down by three diodes and a resistor, signal step-down by a
> 1k8, 3k3 resistor combination), and am attempting to read from it.
> ...Good hobbyist VGA camera module?
larwe - 15:44 16-07-08
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 preference.
I need two of them, and perhaps two spares, to build a de...code for SPI test for MSP430
07:00 03-07-08
can anybody guide me to write SPI communication test code for MSP430?
...Re: Faster than TI C2000?
Jim Granville - 23:02 02-07-08
CC wrote:
> At present I am generating 1us resolution arbitrary pulse sequences
> using compare matches. There must be no jitter so HW compare match to
> generate the edges is essential. I might need to make a waveform like:
>
> START
> delay 4us
> high 15us
> low 12us
> hig...Serial Flash
Jack - 08:32 02-07-08
For an application I need to store a large amount of data (ca. 3MB). A
serial flash could be a good idea (I don't need to erase very often,
and if I erase, I will erase all the data at once).
I found Atmel's products. But there is a problem: Atmel produces 2
types of serial flash: Serial Flash...AC spike go pass XFRM and regulator to reset CPU [Part 2]: It is irradiated?
Rodo - 21:28 01-07-08
Hi all,
A while back I posted a problem I was having with a spike (see original text
below). Someone suggested that the spike would be in the ground line as
well. So I connected the scope probe and ground to the ground of the circuit
and yeap, there it was. I felt rather silly connecting th...Best buy linux comp. CPU ??
MMJ - 04:00 01-07-08
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 costsensitive. What we are looking for is an
embedded CPU bassed on a semi-standard core (ARM, MIPS,PPC.....Re: NAND flash misery
Dombo - 05:59 30-06-08
David Brown schreef:
> Didi wrote:
> > Dombo wrote:
> > > Didi schreef:
> > > > Vladimir Vassilevsky wrote:
> > > > > ...
> > > > >
> > > > > I was under impression that flash is more reliable then HDD; now I see
> > > > > that it is not so. Do you know how reliable are the IDE flash...Re: BasicX platform
Guy Macon - 11:22 28-06-08
Frank Buss wrote:
>
> Guy Macon wrote:
>
> > Good description of the internals of the BasicX line which compiles
> > BASIC code into an intermediate stack-based language:
> >
> > http://home.austin.rr.com/perks/micros/Articles/BasicX%20Internals%20-%20Part%201.htm
> > http:/...Re: tiny inductor with every bypass cap?
Joerg - 16:44 22-06-08
John Larkin wrote:
> On Sun, 22 Jun 2008 13:03:09 +0000, Guy Macon
> wrote:
>
> >
> >
> > John Larkin wrote:
> >
> > > Inductors don't generally help digital chips, and may actually reduce
> > > timing margins. We do use ferrite bead+capacitor filters on the supply
> > > rail...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...Sound chip manufacturer...
jjwsei - 08:18 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 module
will...Using the spi_bitbang linux driver
bobo - 08:01 19-06-08
I've been trying to create a bitbanged spi interface for the
AT91SAM9263ek evaluation card, I'm using the spi_at91_bitbang.c
driver, and removed the check for SPI0 bus.
The problem is when i try to modprobe the driver, it will not enter
the probe function, do i need to add the platform drive...Re: How workable is Vista?
Jim Granville - 15:40 17-06-08
Joerg wrote:
> rickman wrote:
>
> > On Jun 16, 9:07 pm, Joerg
> > wrote:
> >
> > > rickman wrote:
> > >
> > > > I have been looking to buy a new computer for a bit and I had just
> > > > about decided on a Windows XP based system from Dell. Today I called
> > > > them and ...Re: Please suggest USB to RS232 adapter that works 100% [ FTDI rocks... and tunnels a serial port through USB ]
James Beck - 12:50 13-06-08
In article ,
grante@visi.com says...
> On 2008-06-13, Glenn M?ller-Holst wrote:
> > CBFalconer wrote:
> > > Tom?s ? h?ilidhe wrote:
> > > ... snip ...
> > > > Can anyone suggest a USB to RS232 adapter that does its job
> > > > perfectly 100% of the time under Microsoft Window...Silicon Laboratories C8051F060 Slave SPI Issue
Bill Davy - 04:10 13-06-08
Saw an interesting "feature" on a C8051F060 this week. I do not recall the
details, but basically, if I enabled the SPI engine (as a slave) with the
idle clock in one state, SPIBSY came true immediately and every byte
received was shifted by one bit. Worked fine using idle clock in other
s...Adding USB Interface to Low-Cost 8-Bit Microcontroller
David T. Ashley - 21:13 09-06-08
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 customers to re-FLASH our products.
The re-FLASHing would be facilitated by code we ...Re: What Serial Link to use
gdisirio - 11:36 09-06-08
> 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 to understand these protocols individually
but
> when it c...Re: Hello Kernel
15:24 03-06-08
On Jun 3, 2:40 pm, karthikbalaguru
wrote:
> Hi,
>
> I would like to pass commands from Shell
> and check the information exchanged
> between different routines in Kernel Space ?
> Other than printk , Is there any tool / method
> to do that ?
Look at procfs (the virtual files in ...Re: ZIP Algorithm on PIC 16F/18F ?
Jim Granville - 18:47 02-06-08
B1ackwater wrote:
>
> I suppose we could add another fRAM chip, but, well,
> hardware complexity costs dontchaknow ...
or just move to a larger one ?
Ramton have bigger devices then 64kb.
They do i2c to 512kb, and also I see a 2Mb SPI model,
with a 40Mhz spec
-jg
...Issue with the MAX3421 USB IC with the M32C controllers
durai_ece123 - 08:49 02-06-08
Hi,
We are using the MAX3421 USB-HOST/PERIPHERAL Controller interfaced with
the M32C87 controller through SPI for the Mass Storage device operation. We
are facing some problem with that. We are putting the M32C Controller into
Sleep (STOP mode) mode and not the MAX3421, if the USB host is not se...Re: Low Cost arm chips to offload TCP/IP stacks
David Tweed - 10:50 01-06-08
parekh.sh@gmail.com wrote:
> I am considering an application with Spartan-3 FPGAs. I need to run
> TCP/IP and a few other networking applications along with other user
> logic. The trade-off that I am considering is -
>
> Microblaze inside the FPGA costs about 2000LCs. I am considering...Re: Programmer / Evaluation Board / Development Board
Rich Webb - 20:19 31-05-08
On Sat, 31 May 2008 16:17:12 -0700 (PDT), Tomás Ó hÉilidhe
wrote:
> Are all of these the same thing?
>
> Once I take a fancy to a particular microcontroller, the first thing
> I'll want is a piece of hardware I can use for programming the chip.
> Now given that I'm just one person workin...Re: FTDI2232D & SPI
The Real Andy - 05:06 30-05-08
On Fri, 30 May 2008 09:40:17 +0100, "Bill Davy"
wrote:
> 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
> byte...Re: Voltage from high impedence? (Newbie)
rickman - 17:03 27-05-08
On May 27, 2:42 pm, Tom=E1s =D3 h=C9ilidhe wrote:
> I understand from studying electrical science that the "ideal volt
> meter" would have infinite resistance and that it would draw no
> current whatsoever.
>
> However I know in reality that our volt meters have a little bit of
> cond...RE: Embedded Product ESD failure questions for the list
Chris_99 - 14:02 23-05-08
We have a product that is deployed around the world and is in the
human-ESD discharge path.
We are experiencing problems with an occasional CPLD shorting out
internally which, of course, requires
a field replacement of the entire controller. This plastic enclosure,
membrane keypad equipped
pro...Re: Any serial analyzer recommendations?
Rich Webb - 14:31 21-05-08
On Wed, 21 May 2008 10:43:24 -0700 (PDT), fredbasset1000@gmail.com
wrote:
> Hi All,
>
> I need to monitor the serial traffic between a PC and an embedded
> system.
> Can anyone recommend an inexpensive serial analyzer to do this?
> Bonus if it works with Linux as well as Windows.
I use ...Re: Sharing the timeslice
Andrew Halliwell - 11:16 20-05-08
karthikbalaguru wrote:
> Hi,
>
> Consider 3 processes (p1, p2 and p3)
You DO realise where you've posted don't you?
COLA is the last place you'd want to post for this kind of detailed
technical info...
Try comp.os.linux.development.system or its sister group, development.apps.
...adding USB Flash feature to existing product (Vinculum? experience?)
Peter Dickerson - 05:01 14-05-08
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 and
a UART or SPI. Currently this connector is used to add a serial pri...Re: PMOS in parallel with NMOS
Paul Keinanen - 01:25 13-05-08
On Sun, 11 May 2008 23:40:37 +0200, Nils
wrote:
> Jim Granville schrieb:
> > Google surge and resistor, and you might learn something.
> > Failure modes are anything but simple.
>
> A little story about that:
>
> I've fixed my guitar amp a year ago. There was a huge chasis mount 1...My idea of fully-portable C code
=?ISO-8859-1?Q?Tom=E1s_=D3_h=C9ilidhe?= - 18:10 12-05-08
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 actually give an example of the way I
code.
In my most recent ...Re: PCI interfacing
Rube Bumpkin - 19:51 11-05-08
sonika_7 wrote:
> I am developing PCI interface . I have developed a pci-add on card with
> only PLX 9052 chip but it is not working . Actually the LRESET# pin is not
> asserted after turning on the PC.All the local address signals are at 5 V
> .I m not able to track where the problem lies....Re: PMOS in parallel with NMOS
Nils - 17:40 11-05-08
Jim Granville schrieb:
> > Excessive current destroys it merely because of the excessive heat
> > that the current flow produces. It's that simple.
>
> WRONG.
> A little knowledge is a dangerous thing.
>
> Google surge and resistor, and you might learn something.
> Failure modes ...Re: Loss of synchronisation: Are the chips reliable?
Jim Granville - 18:28 06-05-08
Tomás Ó hÉilidhe wrote:
>
> The method of using one pin would be implemented by feeding the
> microcontroller pin into a 3-Bit binary counter which feeds into a 3-
> to-8 decoder.
>
> I've been warned against using the one-pin method, people telling me
> that I could lose sync if "a ...Re: Looking for places to get certified in?
ssubbarayan - 00:32 06-05-08
On May 6, 12:02=A0am, Tom=E1s =D3 h=C9ilidhe wrote:
> On May 5, 5:36=A0pm, Tim Wescott wrote:
>
> > Finding who the local sweatshop is and working there for a couple of
> > years to gain experience may be a good idea -- the sweatshops don't pay
> > much, and they're grim to work f...uC Slection for a learner project
AC Me - 13:51 03-05-08
Hi all.
Yet another request for help in the selection of an appropriate uC.
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 2 seconds and store
the weathe...Re: Ethernet in its most basic form
robertwessel2@yahoo.com - 20:29 02-05-08
On May 2, 7:02=A0pm, Tom=E1s =D3 h=C9ilidhe wrote:
> On May 3, 12:17=A0am, "robertwess...@yahoo.com"
>
> wrote:
> > If what you're wanting to do is implement the protocol stack, then you
> > definitely want to use a canned Ethernet controller. =A0And that will
> > give you exact...Re: Task priority for UI task handling menus and other controls
=?ISO-8859-1?Q?Hans-Bernhard_Br=F6ker?= - 17:31 02-05-08
Steve Watt wrote:
> [0] OK, a continuous 200 ms lag of response in my joystick would make
> landing on a carrier somewhat harder. On the other hand, if it was
> always there, it could be trained around and compensated for.
But then, it would be a continuous 200ms lag. It would be a 20ms...