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I2C
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 590 threads matching "i2c"
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The most relevant threads are listed first
Devantech USB-I2C R286-USB-I2C board
mInfo - 2007-02-16 17:57:00
Hello,
I bought the Devantech USB-I2C R286-USB-I2C board. The Devantech USB-
I2C module is a low cost USB to I2C module, with a simple command set,
and interfacing to any I2C device. I'm trying to set the I2C interface
between my I2C board and R286-USB-I2C?
Also I do need a help in User Int...
I2C port IO chips
Ralph Malph - 2004-01-21 12:03:00
I looked around the web and could not find any sources of I2C port IO
chips other than Philips. Seems to get most of their I2C parts, you
have to buy a couple thousand minimum. I am looking for a way to add 8
or 16 IOs. Some chips are port expanders, some are LED drivers; either
will work if ...I2C simulator
Wills - 2009-04-11 23:00:00
Hi all,
I want to learn 'how to program an I2C device' . I am trying to find
a simulator for an I2C device which I can use to test any sample
programs I get from the web. When I search the web for a simulator I
get a lot of VLSI related results. Is there a free I2C device
simulator software fo...Re: I2C port IO chips
CBarn24050 - 2004-01-22 11:54:00
Hi, spi is harder to get multi master bus to work than i2c. I2c goes up to at
least 400khz.
...I2c master routine
Bram van de Kerkhof - 2004-01-28 02:00:00
Who has some standard working i2c routines for me.
I want to use the ds1307 and other i2c products.
Yours Bram
...I2C Interface for MSP430
sundar_1984 - 2006-12-07 10:47:00
Hi all,
I am using MSP430F1121A on my board and its is connected on the I2C bus. I
need to validate the I2C on board on CCS platform without any drivers. I am
able to test the I2C for a Video Decoder, aslo on board by sending the
addresses of the device as well as the registers that i want to rea...I2C support - 'built-in' VS modules
drasko - 2006-08-17 04:52:00
Hi all,
I have a question about incorporating existing I2C support in kernel.
1) In order to have working peripherel on I2C bus I have to insmod:
a) i2c-core.o
b) i2c-dev.o
c) i2c-proc.o
d) i2c- .o
e) i2c- .o
Am I right? Did I miss something?
2) Mo...why not just say I2C?
tim - 2004-12-20 16:04:00
I am currently working with a range of peripherals whos
control lines look remarkably like an I2C interface.
The data sheets go into great detail about how the data and
clock line are used to communicate with the device and how
it has an own 'address' so that you can differentiate it from
o...Accessing global var of another file
galapogos - 2006-10-18 23:31:00
Hi,
I have a multi-file project and in main.c I have a global array to
store a string of characters. In my main function I call function
i2c_send from another file(i2c.c) that sends this string over i2c.
Naturally, my i2c isr is in i2c.c, and naturally it needs to write the
string into the i2...I2C without resistors
mmihai - 2007-08-22 00:24:00
Here you'll find a writing about a resistor-less I2C implementation:
http://www.delajii.net/~mmihai/Articles/I2C_precharged.html
As the name of the link is saying, it's a 'precharged' I2C bus.
Enjoy!
--
mmihai
...UART I2C and SPI Tests
IJALAB - 2008-02-25 13:25:00
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...problem with i2c on r8c/1b
2007-02-08 19:57:00
I'm trying to set up an r8c/1b chip as an i2c slave, but having no
luck. I've read all the app notes and user forums I could find. The
symptom is: The i2c module sees the start condition, becuase the
"busy" flag gets set correctly. However, the SCL/SDA monitor flags
never change (reading P3...IR receiver for I2C bus?
Matthias Melcher - 2006-03-22 17:01:00
Is there such a chip that receives TV remote control IR signals and
stores them so they can be retreived later via I2C?
I am aware that I can do that myself using a uController, but I was
wondering if there is already a chip out there. If it also had a
transmitter, that would be even bett...i2c/rs232 converter
Raphael - 2004-01-30 17:18:00
Does anyone know of a way to put an rs232 ascii data stream onto an
i2c bus as a slave device.
For example, I have an i2c bus which has a master already. I need to
give this master the data which is coming from an rs232 device, the
problem is that all the rs232 to i2c converters I've seen are ...LPC2138 I2C
Frank van Eijkelenburg - 2008-06-18 10:27:00
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: I2C drivers (for AMBA)
drasko - 2006-08-02 08:26:00
Thanks all for support!
As I see for now, I'll have to write 'busses' part of the driver to
suppport ApI2c interface. I gusess some kind of simple alogorithm will
be implemented within it. I'll check out existing code and try to
figure out something.
Maybe someone would know which bus adap...Microcontroller with two I2C slave addresses?
John Temples - 2004-10-06 15:28:00
Is anyone aware of a micro that has a hardware I2C slave
implementation that can listen for two different I2C addresses
simultaneously? (Not including the general call address...)
--
John W. Temples, III
...OT, anyone tried LM73 I2C?
2006-10-28 15:19:00
Using a BasicStamp to read from LM73 using I2C, but just getting all
1s. Have used I2C before for memory IC and PCF8574 bus expander, OK
but nothing from the LM73. Has anyone had sucess?
...I2C - Do i need to check all the states of I2C bus?
abhay - 2007-02-01 00:37:00
hi,
i am working with philips microcontroller LPC935 which is to be
attached to I2C port expander.
i have to write a code for this .As my device is configured as master
receiver to read (i have to read only) the value or status of port
pins .
my question is that : Do i need to check for all ...AT91R40008 - I2C question.
Johnny - 2005-02-13 06:20:00
I was looking at the Atmel AT91R40008 for a new design. However I
realised it dosen't support I2C.
Does anyone have a recommendation about how to interface a real time
clock, and maybe a serial eeprom. Is an I2C bus master a sensible
approach, perhaps from Philips?
The main objectives ar...I2C high speed mode and I2C range extending
Michael - 2007-06-14 12:22:00
Hi - are there any microcontrollers out there that support I2C high
speed mode? (3.4Mbps - defined in the I=B2C-bus specification, Version
2=2E0). I can't find any that do. I can't even find any NXP parts that
do!
Also - has anybody ever used an I2C bus extender chip? (ie the NXP
P82B715). Wh...Simulatring I2C communications in AVRStudio?
Anonymous - 2006-01-31 09:14:00
Hello,
I'm trying to test my I2C code in the AVR simulator in AVRStudio. Is it
possible to simulate an entire I2C communications session without having
to resort to setting bits in the processor registers? Any tips?
TIA
-=-
This message was sent via two or more anonymous remailing ...I2C hangup
Richard Henry - 2005-06-30 13:58:00
I have noticed while checking out a prototype board that the I2C devices
occasionally hang the bus (SDA held low) preventing any further bus
transactions. My only fix is to cycle power to the board. That leads me to
wonder whether adding a fet power switch feeding the I2C devices controlled
by...I2C off board distances
Colin MacDougall - 2004-09-16 16:01:00
Has anyone any experience of running an I2C bus from
a PCB to a remote I2C device ? I am thinking of
connecting a remote Dallas Semiconductor I2C temperature
sensor IC to a micro over a length of 4 or 5 metres of
wire. The temp sensor would be fixed to the ceiling to
measure room temperature an...I2C Question
Anonymous - 2006-03-18 21:23:00
If a I2C master is in the middle of communications transfer with a slave and the slave suddenly resets or hangs, how can the I2C master regain control of the bus, and how can it prevent from 'hanging' when the slave keeps clock stretching?
-=-
This message was sent via two or more anonymous re...I2C vs SPI
Joe G (Home) - 2010-02-08 05:51:00
Hi All,
SPI is more simplistic in internal IC hardware design than I2c. If the SPI
data bus receive garbage (spikes or noise) you can pull the chip select high
and start clocking the data in/out again.
SPI has
/CS chip select
Clock
Data out
Data in
I2C has
Clock
Data
Question...Re: Looking for a Nucleus SDK
Sebastien - 2004-09-26 07:53:00
Andy_tw wrote:
> Check the following website:
> http://www.acceleratedtechnology.com/
>
> BR
> Andy
I've downloaded the development tools there but unfortunately, as far as I
know, the XRAY debugger doesn't support the I2C debug interface my system
seems to be equipped with.
Using L...Re: Nvram write modes and problems
ssubbarayan - 2007-03-29 00:01:00
Dear experts,
Thanks for your replies.
1)We did try to simulate brownout tests by varying voltage to the
Nvram when write is going on.This was not able to produce the problem.
2)Mr.Vladimir,can you please explain your point number 3),I would like
to understand more about it from you.
3)We ...Newbie: Geode, I2C & Linux
Anbeyon - 2006-04-26 09:17:00
Hi I am hoping some of you guys can point me in the right direction.
I have a job on the horizon that will run Linux (not sure which
distribution yet) on a Geode based board. The Geode has Access bus
which is similar to I2C.
Does anyone know is I2C supported on Geode processors under Linux ...PIC MSSP module in I2C mode
Ralf Hildebrandt - 2004-06-16 07:39:00
Hi all!
The Microchip PIC16F87XA has got a MSSP module. Bits SSPM(3 downto 0) in
SSPCON register configure the mode of the module. For I2C operation the
following options are available:
1111 = I2C slave, 10bit addressing, with START/STOP interrupts
1110 = I2C slave, 7bit addressing, wit...FPGA communication, I2C and DAC
redstripe - 2006-02-28 16:49:00
I would like to use an FPGA for a motor control application. I have
worked with FPGAs before and am comfortable with what needs to be done
inside the FPGA, where I need some advice is how to interface the FPGA
with the outside world. At the end of the chain I need to generate an
analog command v...I2C slave code example for an ATtiny26
Piotr Piatek - 2004-03-04 10:20:00
Hello all,
I'm trying to implement an I2C slave device using the Universal Serial
Interface. The program kind of works, but sending any odd data (i.e.
with the least significant bit set) through the I2C bus causes a start
condition. Could anyone help with a working code example?
My program ...I2C multiple addresses for slave
Phil - 2004-03-17 14:38:00
I am trying to implement a slave I2C interface using
a PIC16F876 but it can only accept a single address
as a slave, I have looked at the Atmega 168 and it
has an address mask register (TWAM) but I am
unsure if this will allow the device to respond to
more than one slave address.
Anyone with a...Silabs c8051f411 I2C,is clock stretching transparent to the programmer?
blisca - 2008-07-21 15:11:00
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...I2C Questions -- Not In the FAQ
Anthony Presley - 2004-09-12 12:03:00
Hi all,
I have a few questions about the i2c bus which I can't seem to find
anywhere else. Any answers would be greatly appreciated.
We're building a device based on a previous design, from another firm,
which uses the MSP430F149, which does SPI, but not I2c. The existing
design uses i2c ...microcontroller to microcontroller - I2C...
Mike V. - 2004-03-25 23:03:00
Hi guys,
I am soon to implement 8-bit micro-to-micro i2c.
I've done micro-to-micro SPI and know how the bytes are shifted back
to you by the receiver. I've also done I2C from micro-to- a
temperature controller chip in C. Looked pretty easy to send a command
requesting for temperature, then ...Microcontroller with I2C AND robust clock stretching?
2005-05-19 15:32:00
Does anyone know of an 8-bit microcontroller (among PICs, 8051s,
MC68XX, Atmel) that has a built-in i2c module which does the following:
** As a i2c slave device, it's module automatically stretches the i2c
clock (SCL) during both a WRITE and a READ by the master?
(I currently am using PICs,...How to Un-Hang a DS RTC Chip Stuck in I2C La-La-Land ???
B1ackwater - 2008-06-10 11:02:00
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...i2c galvanic isolation
Henry - 2003-12-19 16:57:00
Hi!
I need a i2c bus isolation with optocouplers or another technology. Google
doesn't know interesting hits. Any hints other than the Philips solution
with i2c bus drivers and optocouplers? An integrated solution as a cheap
sockable DIP or SMD device would be great.
I wonder that none of the b...maximum ranges of serial, spi, and I2C?
Michael - 2007-06-12 21:11:00
Hi there - can anybody tell me the maximum ranges of serial, SPI, and
I2C? Specifically, I'm referring to I2C running at 400Kbps, serial at
1Mbps, and SPI at 1Mbps. I guess with serial the physical layer used
changes things around alot - so I'm referring to RS-232. Is there a
better name than se...