example: i2c arduino master and slave communication

Hello,
I need a arduino master & slave communication over i2c.
I try some examples and tutorials from the net, but I don't get it to run. I tested this with UNO, NANO, MEGA – whatever I try, the standard i2c-scan didn't find the slave.

Is there a special trick to solve this?
Has someone a running example for me, please…???

best regards and thank you in advance!

Thanks, I will have a look as soon as posible.

I2C communications. I'm afraid it doesn't work on trunk either. I attach all the test apparatus.

Tell me ASAP, please.

Thank you very much, Defran!
I have tested your files here under Linux64 – make additional jobs for uno, mega, nano – with and without pullup-resistors.
All test, under rc3, sr0, R1348 didn't run.

standard-i2c-scanner did not find any slave…?!?

There is a problem with AVR I2C in slave mode.
I'm working on it but the solution is not trivial.

arcachofo wrote:There is a problem with AVR I2C in slave mode.
I'm working on it but the solution is not trivial.

I guess, it was done for I2C RAM (SEEP memory as 24C512).
But, of course, implementing it, in an MCU, likely needs some other considerations.

Hello KerimF,
I think, the implementation is already done – but it's not running on the Arduinos at the moment…

https://wiki.mexle.org/lib/exe/fetch.php?media=microcontrollertechnik:twi_slave_master.zip

https://wiki.mexle.org/doku.php?id=microcontrollertechnik:10._i2c_schnittstelle

Issue solved at 1.0.0 R1351 and trunk R1655.

ok, in T1657, thanks.