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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...Procyon Library for Atmel AVR MCU - =?ISO-8859-15?Q?I=B2C?= problems

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...Silabs c8051f411  I2C,is clock stretching transparent to the programmer?

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 ...Alternate supplier for dallas/microchip 1-wire memories

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...Re: Ethernet design

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...Good hobbyist VGA camera module?

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.....Best buy linux comp. CPU ??

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 ...Re: BasicX platform

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...Sound chip manufacturer...

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...LPC2138 I2C

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: Flash retention in uC at higher temps, experience?

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. >...Re: build camera using cmos3088

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...How to Un-Hang a DS RTC Chip Stuck in I2C La-La-Land ???

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...initialization steps that I have learned

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: What Serial Link to use

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: ZIP Algorithm on PIC 16F/18F ?

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: Any serial analyzer recommendations?

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 ...I2c slaves at different clocks

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: uC Slection for a learner project

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...Re: Anyone out there using Ada ?

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 ...CM3 support

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: Monochrome LCDs

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: A Challenge for serialized processor design and implementation

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: PCI SPI interface card

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: Averlogic AL250 and scan doubling

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: SPI noise, shielded cable required?

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: QAM tuner ic: who makes one?

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...Re: Linux RAM driver question

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...UART I2C and SPI Tests

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...free rtos for PIC18 with complete drivers

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: PIC microcontroller I2c communication problem

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 Breakout

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: USB programming on the VM110

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: CAN bus over COAX

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: EEPROM guarantees after power loss during a write

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: bootrom & coldfire - basic doubts

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: PSOC Humor

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: I2C trick?

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...Re: Microcontrollers, USB and Linux

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 ...Custom board based on AT91SAM9260 PQFP Processor

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. ...Re: Cirrus Codec CS4270
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