Macegr,
I'm confused..... Yeah, well, that's normal for me.
But until now we have been talking about an MCP and the I2C bus - right?
Looking at your example sketch (shiftbrite [macetech documentation]) that is on the SPI bus.
"The following Arduino code illustrates using the built-in SPI hardware for faster updates, "
In fact over on the left of the screen where the example scripts are listed I see this:
Simple Test
Rusty VU
ATTiny & AVR-GCC
AVR Assembler
Hardware SPI Example
Non-hardware SPI Example
OctoBrite on ATTiny84 with HW SPI
That's three SPI references and even the SIMPLE TEST is SPI.
Granted a bit further down on the original mentioned page, there is an I2C example.....
When I ran that I get alternate black and white lines on the LCD screen.
Black as in the (oh boy.... what is the CHR$() value? The inverted blank character.....)
So one line of those, one line of clear, one line of them again and the last line clear.
That is a simple cut/paste job and as a function in my sketch.
Shall maybe try as is, but .....