Multiple AXE-033's?

[gdenehy]

Is it possible to change the I2C adress of one of my AXE-033's so I can use more than one?

 

[westaust55]

Nothing indicating that is possible in the manual so I believe the answer is NO.

 

[BeanieBots]

Indeed, I'm sure if it was possible, there would be instructions on how to do it.
The only way I can see of using more than one would be to use seperate pins in serial mode. Failing that, a 4066 or similar to multiplex the I2C bus.

 

[Technical]

The i2c address is fixed.

 

[gdenehy]

So if I want 2 picaxes that both have an lcd attached to them, then I cannot get them to talk to a single shared eeprom on the i2c bus then...

 

[westaust55]

So if I want 2 picaxes that both have an lcd attached to them, then I cannot get them to talk to a single shared eeprom on the i2c bus then...

You cannot have two AXE033 LCD modules working in i2c comms mode connected to the same i2c bus as they both have the same address which would lead to conflicts when ever anything else tried to communicate with them.

But for your new question:
That would mean you have two i2c master devices on the same i2c bus.
I have not tried but from the Philips i2c specification (2000 version):

The multi-master capability of the I2C-bus allows rapid
testing and alignment of end-user equipment via
external connections to an assembly-line

so, as multi-master is permitted, it should work.
You may still run into communications conflicts if both mast devices try to communicate with the EEPROM at the same time but such clashes may be rare depending upon how much i2c bus traffic your program(s) are creating.