Multiple I2C busses on one processor

[JamesW, kent, England]

Hi Folks,

Simplest question ever.

I have an application where I need to use 15 MCP23008 I/O expanders. Problem is - there are only 8 available addresses to use.

Can I do the same with #USE_I2C as you can with #USE_RS232 and create multiple I2C ports on a PIC?

Or is it a little more complicated than that?? If it is, can anyone recommend a more elegant solution please?

Thanks in advance

James

[PCM programmer]

Yes, just create two i2c busses. Each of the two busses will have its own
#use i2c statement, which defines the i/o pins used by the bus. Each
bus must have its own set of pull-up resistors on it. The compiler
supports named "streams" for #use i2c(), similar to #use rs232().
See the manual.

[JamesW, kent, England]

Thanks for the help

James