Some of these chips, though, don’t have native SPI or I2C interfaces; instead, everything is done through a USI, or Universal Serial Interface module. [Jan] found the stock I2C USI module was a ...
The Bus Pirate made all this easy, allowing [Inderpreet] to quickly display “Hello” on his LCD module. The I2C bus is just the tip of the iceberg for the Bus Pirate. If you’re interested in ...