I2C with two picaxes

[russbow]

The attached is an idea of using an 08m2 to write to an eeprom and a 18m2 to read from the eeprom.
I have used multiple devices on an I2C bus before -> picaxe, RTC, eeprom, but never two picaxe chips.

Is this possible and are there any pitfalls.

 

[nick12ab]

PICAXE doesn't support multi-mastered i2c so you would have problems doing it like that. You'd have even more of a problem if the clock line on the PICAXEs stay as outputs when they are not using the bus.

You would have to at the very lease#t implement some extra handshaking between the two PICAXEs, or check whether the bus is in use by the other PICAXE before the first PICAXE uses the bus.

 

[russbow]

Thought so.

Thanks Nick. Guessed it wasn't straightforward hence the question.
Stick with the 18m2 to do both tasks

 

[Jamster]

Dont forget you can multitask on an M2!!!!

 

[russbow]

Yes, I think I've got to try that. Was just hoping to use existing program with minor mods.
A total re-write and clean up wouldn't be a bad thing though. Nowt else to do with this constant rain is there.