How to Read from I2C device

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I want to read data from an I2C, but i am beginner in working with serial ports and I2C.
How should i start?

Edit: I have an I2C device, an I2C to USB convertor and a USB cable.I have connect them together with this sequence:
The I2C device is connected to I2C-USB convertor with a cable and the convertor is connected to the USB cable finally the USB cable is connected to my computer system.
by the way i have using Windows XP on my system.

Posted 14-Feb-12 22:55pm

M_Mogharrabi

Updated 17-Feb-12 19:01pm

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CPallini · Answer 1 · 2012-02-14T23:38:00

Solution 2

I2C stands for 'Inter-Integrated Circuit'. The name is an hint of what happens: "serial communication between integrated circuits", e.g. microcontroller communicating with external EEPROM.
Why do you need I2C on the PC side?
Uusually the PC communicates with a microcontroller (via RS232 or USB) that in turns communicates with the peripheral using I2C.

Posted 14-Feb-12 23:38pm

CPallini

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M_Mogharrabi 18-Feb-12 1:01am

sorry for my delay.I have edited my question...

OriginalGriff · Answer 2 · 2012-02-14T23:30:00

Solution 1

AFAIK there is no PC with an I2C bus connection - there are I2C to USB converters, but those you would just treat as a standard USB / serial port.

What are your actually trying to do? Because I think you have missed out a big chunk of something...

Posted 14-Feb-12 23:30pm

OriginalGriff

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M_Mogharrabi 18-Feb-12 1:01am

sorry for my delay.I have edited my question...

OriginalGriff 18-Feb-12 4:15am

Treat it as a standard serial port then.
Look at the documentation for your converter - it should tell you everything else, except what kind of data the recipient is expecting, and that is down to the I2C device...

M_Mogharrabi 18-Feb-12 5:18am

This is the link(http://www.robot-electronics.co.uk/htm/usb_i2c_tech.htm) of my I2C-USB convertor documentation.but i could not found what should i do yet???
please describe more....

OriginalGriff 18-Feb-12 5:27am

It all seems pretty clear - if technical. They even give you source code examples!
Without actually having the converter to check against, I could not possibly test if the drivers work as standard com ports in .NET - you would have to do that.
Have you read teh documentation, and installed the drivers? Can you see the com port?

M_Mogharrabi 18-Feb-12 23:59pm

yes,I have installed drivers and i could see com port in device manager and also i could found and run a c# code to open the port.but i want to know if there is another code to read data from my i2c device.my i2c device is RM_144 and '0x53' is the address of it.but i do not know how should i use this address!!!.....

OriginalGriff 19-Feb-12 3:41am

You really need to look at the sample code given on that site - and possibly the manufacturer of the RM_144.
Getting into the detail of I2C protocol for a specific device is a bit more that we can do here - we don't have access to your device and so couldn't test anything if we did all the research for you! :laugh:

Member 11017056 · Answer 3 · 2014-12-23T13:08:00

Solution 3

Load Linux and use i2cdetect or the other i2c tools

Posted 23-Dec-14 13:08pm

Member 11017056