A software defined, industry-standard, I²C library that allows you to control an I²C bus via xCORE ports. I²C is a two-wire hardware serial interface, first developed by Philips. The components in the libary are controlled via C using the XMOS multicore extensions (xC) and can either act as I²C master or slave.

The libary is compatible with multiple slave devices existing on the same bus. The I²C master component can be used by multiple tasks within the xCORE device (each addressing the same or different slave devices).

The library can also be used to implement multiple I²C physical interfaces on a single xCORE device simultaneously.

• I²C master and I²C slave modes.
• Supports speed up to 400 Kb/s (I²C Fast-mode).
• Clock stretching support.
• Synchronous and asynchronous APIs for efficient usage of processing cores.

The CHANGELOG contains information about the current and previous versions. For a list of direct dependencies, look for DEPENDENT_MODULES in lib_i2c/module_build_info.

The following application notes use this library:

• AN00156: How to use the I2C master library
• AN00157: How to use the I2C slave library
• AN00181: xCORE-200 explorer accelerometer demo