08m as a i2c slave tutorial out there?

[tater1337]

I'd like to make a few ADC that can talk via I2C, and maybe have a couple to drive servos. the tutorials i see are all for making the picaxe a master, but i am looking to make a bunch of slaves. anyone know of some good tutorials outs there?

 

[hippy]

Only the X2 and X1 PICAXE chips can be used as I2C Slave devices.

 

[tater1337]

well nuts, would be nice for a 08x? chip, just want something small. I'l guess i'll suffer with 20x2, question still remains, I mainly want to use a raspberry pi for a master and a number of picaxes for slaves, any advice for tutorials? the reasoning being the Pi doesnt do analog inputs or PWM outputs easily

 

[hippy]

There aren't any tutorials as such but there have been discussions and examples on the forum here.

The PICAXE appears as "I2C RAM", the master can read and write scratchpad memory over the I2C bus, the PICAXE can take bytes from and put them to the scratchpad.

 

[westaust55]

In the PICAXE manual 2 and in the web pages for the basic commands, the information is provided under the Hi2cSETUP command:
http://www.picaxe.com/BASIC-Commands/Advanced-IO-Interfacing/hi2csetup/

This states that the i2cslave mode is only applicable for the X1 and X2 parts as hippy has mentioned.

There are also description for how and what happens between master and slave when one chip is acting as an i2c slave device.