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Discussion Groups
I2C
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 465 threads matching "i2c"
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The most relevant threads are listed first
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...
Silabs c8051f411 I2C,is clock stretching transparent to the programmer?
blisca - 15:11 21-07-08
Hi to all,thank you for dedicating me a bit of your time.
I'm trying to modify a program that i "inherited", it was done for a similar
project,where the c8051 acts as a I2C slave;
reading the code i saw that in the I2C section done by the SMBus no mention
is done to clock stretching.
I...Alternate supplier for dallas/microchip 1-wire memories
Stef - 11:20 18-07-08
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 eeprom. The only suitable device from
maxim therefore ...Re: Ethernet design
Rich Webb - 20:26 16-07-08
On Wed, 16 Jul 2008 15:44:16 -0500, Nobody Here
wrote:
> I need to start thinking about some Ethernet designs, one as a standalone
> switch and the other to integrate a 2 port switch with a microcontroller.
>
> I've looked at some datasheets and reference designs and it doesn't seem
> to...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...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: BasicX platform
Frank Buss - 04:18 28-06-08
Guy Macon wrote:
> Good description of the internals of the BasicX line which compiles
> BASIC code into an intermediate stack-based language:
Nice description, but I'm not sure, if a virtual machine is a good idea for
microcontrollers. Many applications are not time critical, so this is ...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...LPC2138 I2C
Frank van Eijkelenburg - 10:27 18-06-08
Hi,
I am still using the LPC2138 ;). Now I have a problem with I2C. When I
try to send some bytes to an EEPROM device, the following happens:
- I2C start condition is made
- interrupt is generated
- I2C address is sent
- EEPROM device gives an ACK
And now nothing happens. If I look at t...Re: Flash retention in uC at higher temps, experience?
TheM - 16:11 14-06-08
"Frank Buss" wrote in message news:i5s7vw2ybqby.17ppigai6cf64.dlg@40tude.net...
> TheM wrote:
>
> > I thought it was limited number of writes. But for certain packages (serial) it practically means
> > unlimited as the protocol limits number of reads sufficiently.
>
> The Freescale ch...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.
>...How to Un-Hang a DS RTC Chip Stuck in I2C La-La-Land ???
B1ackwater - 11:02 10-06-08
I've been working with a Real-Time-Clock chip, the DS-1337+, and
noticed that if the final I2C read operation isn't accompanied
by a 'no-ack' then I2C communications hang-up shortly thereafter.
The PIC language I'm using (MikroPascal) does not have a proper
"time-out" for I2C operations, so ever...initialization steps that I have learned
Rudy - 09:51 10-06-08
I have recently learned some initialization mistakes that I have made
while programming a TMS470R1B1M and for all the new people who do not
have experience (like myself), I would like to share these. Not sure
if this applies to this group since it seems people here have a lot of
experience, but...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: 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
...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 ...I2c slaves at different clocks
sajeera - 02:59 16-05-08
Hi,
My question is a very basic one. Can an I2C Master run a slave at 100
kz and another slave at 400 khz?
Thank you,
Sharaf
...Re: uC Slection for a learner project
Frank-Christian Kruegel - 11:41 04-05-08
On Sat, 3 May 2008 10:51:56 -0700 (PDT), AC Me
wrote:
> 1. Very small power consumption. It would be nice if the uC would be
> capable of operating from the merest suggestion of a hint of a
> picowatt :)
There are several. I'd start with MSP430 and AVR.
> 2. A 1-Wire interface would b...Re: Anyone out there using Ada ?
James Beck - 15:46 30-04-08
In article ,
yaldnif.w@blueyonder.co.uk says...
> On 30/04/2008 17:20, in article
> 125abc62-7cc7-4e73-9bcb-f329275865dc@q1g2000prf.googlegroups.com, "linnix"
> wrote:
>
> >
> > > "The 1980s will probably be remembered as the decade in which
> > > programmers took a giganti...CM3 support
henza - 18:01 27-04-08
Hi all,
I would like to know if uclinux suports CM3 port and other peripherals
such
as I2C, ethernet, RS232... and other communication method?
Many thanks,
Henry
...Re: Monochrome LCDs
larwe - 07:26 23-04-08
On Apr 23, 4:55=A0am, "ydoubl...@gmail.com" wrote:
> Just about to begin some works on Monochrome LCDs. I had some
> experience dealing with those characters LCD driven by HD controllers.
What kind of monochrome LCDs? There are some simple LCDs with the
controller integrated on the glas...Re: A Challenge for serialized processor design and implementation
rickman - 16:51 09-04-08
On Apr 8, 5:30 pm, Jim Granville
wrote:
>
> Re Quad Serial memory devices, and execute in place :
> I see SST have just released a Quad device as well.
> $1.16/10K for 16MBit
>
> Good news, and bad news :
>
> Good news: 80MHz nibble rate. They also added 8 & 16 bit address modes,...Re: PCI SPI interface card
07:02 01-04-08
On Mar 31, 9:58=A0pm, Freelance Embedded Systems Engineer
wrote:
> p...@island-sys.com wrote:
> > I am developing an embedded product, and I need to talk to it using
> > the MPU's SPI interface. =A0I have been looking around for a cheap PCI
> > card that has an SPI interface on it but...Re: Averlogic AL250 and scan doubling
Paul Carpenter - 09:08 28-03-08
"Keith M" wrote in message
news:9X%Gj.4590$N_5.2704@trnddc05...
> Does anyone have experience with the Averlogic AL250 Video Scan Doubler
IC?
Not directly but doing various resolution video deinterlacing to various
resolution
LCD panels.
> Datasheet is here
>
> http://www.ortodox...Re: SPI noise, shielded cable required?
Leon - 11:15 22-03-08
On Mar 22, 12:12=A0pm, "dohzer" wrote:
> I've got an SPI master/slave test circuit set up between two Atmel ATmega8=
> microcontrollers, with the master on an STK500 development board and the
> slave on a breadboard.
>
> I noticed that sometimes I would get noisy communications and ot...Re: QAM tuner ic: who makes one?
Hans Bus - 05:51 20-03-08
Rodo schreef:
> Hi all,
>
> I was looking at Broadcom's parts for (cable) tuner/receivers. I tried to
> find other mfrs that make similar products. I found Infineon makes some
> stuff for tuners but not the QAM kind for cable. Who else makes QAM tuner
> chips? Maybe even simpler than...Re: Linux RAM driver question
larwe - 05:53 26-02-08
On Feb 25, 9:58 am, Tim Wescott wrote:
> Now, I _don't_ know if PC chipsets need to have their RAM drivers set up
> by the processor or if they're just designed to work with specific types
> of RAM and that's that. I know the Motorola MPC860 did work with a
They certainly do need powe...UART I2C and SPI Tests
IJALAB - 13:25 25-02-08
Hello All,
I have drafted test plan for verifying peripheral behavior but Does
anyone have system level tests for testing i2c, uart and spi
peripherals from a software perspective? pls share the tests that one
should carry out for thoroughly verifying a driver from:
1. i2c multimaster
2. i2c...free rtos for PIC18 with complete drivers
CMOS - 02:16 24-02-08
hi,
i've started playing with FreeRTOS MPLAB port for PIC18 devices and it
works fine. however this port does not include drivers for i2c, USB,
etc. therefore im looking for some other free RTOS projects for PIC18,
that has these drivers already developed. If there are no existing
free rtos's w...Re: PIC microcontroller I2c communication problem
karthikbalaguru - 19:24 15-02-08
On Feb 15, 10:57=A0pm, CMOS wrote:
> im using 18f4455 PIC micro controller for a i2c communication.
> according to the data sheet, in order to generate start condition, we
> need to set 0 th bit in SSPCON2 register. when inspected i see that
> the bit does not get set. i wait until the i2...Re: USB Breakout
Eric Smith - 16:01 14-02-08
Ulf Samuelsson wrote about someone's need to diddle the contents of
a data stream between a USB host and device:
> You could conceivably put an MCU with a USB host and a USB device
> in between, and let the MCU process the packet before sent out/in to
> the downstream device.
>
> There wi...Re: USB programming on the VM110
Andrew Smallshaw - 15:06 14-02-08
On 2008-02-13, Gavin Brewer wrote:
> "Andrew Smallshaw" wrote in message
> news: ...
>
> What I would like to build is an RSA cryptographic protocol
> Burnt into EEPROM firmware, and running off the VM110 as
> a USB-based project.
>
> To complicate things, the hardware setup ...Re: CAN bus over COAX
Jim Granville - 17:51 07-02-08
Hans-Bernhard Bröker wrote:
> David Brown wrote:
>
> > Firstly, a CAN bus is only AND-wired if you are referring to the
> > actual electrical levels using standard CAN drivers. If you are
> > thinking about the logical levels, "dominant" and "recessive", you
> > think of it as OR-...Re: EEPROM guarantees after power loss during a write
Robert Adsett - 17:24 06-02-08
In article , John Devereux
says...
> Robert Adsett writes:
>
> > In article , John Devereux
> > says...
> > > Hi,
> > >
> > > I am wondering what guarantees are there for existing EEPROM data,
> > > after power is lost during a write operation?
> > >
> > > I ...Re: bootrom & coldfire - basic doubts
Wayne Farmer - 16:38 16-01-08
On Jan 16, 7:59=A0am, "rennie606" wrote:
> Hi,
> =A0I am a newbie to coldfire version processor's & serial flash. I have fe=
w
> basic doubts which I want to share.
> The micro I am using is MCF5251 which claims to have internal BootROM &
> could be configured for external as well & Se...Re: PSOC Humor
14:24 04-01-08
On Thursday, in article
gnuarm@gmail.com "rickman" wrote:
> I received an email advertisement from Avnet for the Cypress PSOC
> FirstTouch Starter kit. I noticed an unusual feature...
>
> Key Features:
>
> * Four embedded designs right out of the box
^^^^
Onl...Re: I2C trick?
Vladimir Vassilevsky - 10:23 30-12-07
"Stefan Reuther" wrote in message
news:fl655s.mk.1@stefan.msgid.phost.de...
> Vladimir Vassilevsky wrote:
> > So far nobody suggested a
> > valid reason why exactly it is a bad idea to swap the SCL and SDA to
> > separate the I2C slaves.
> If I see that correctly, the line-swa...Re: Microcontrollers, USB and Linux
15:12 28-12-07
Joost Leeuwesteijn writes:
> I would like to develop a _simple_ and low-cost microcontroller hard-
> and software platform for study/training purposes, for my colleagues
> (and myself :-) ).
I'm working on one at the moment, but much simpler than ARM:
http://www.delorie.com/electronic...Custom board based on AT91SAM9260 PQFP Processor
Nicholas Kinar - 00:02 26-12-07
I have recently designed and built a custom board using the AT91SAM9260
(Rev A) processor. The design consists of one MT48LC16M16A2 memory chip
(instead of using two chips in similar fashion to the evaluation kit);
the CS of the boot code memory (AT45DB642D) is on CS1 of SPI0; and a
number ...Re: Cirrus Codec CS4270
Vladimir Vassilevsky - 16:33 22-12-07
"rickman" wrote in message
news:f3e60e4b-b29e-49db-a108-d8d72b376d32@e6g2000prf.googlegroups.com...
> I am considering using the Cirrus CS4270 codec in a new design and
> wanted to ask if anyone had used this before and if it had any gotchas
> that weren't described in the errata sheet.
...