| orphan: |
|---|
| vendor: | XMOS |
|---|---|
| version: | 6.4.0 |
| scope: | General Use |
| description: | I²C controller and peripheral library |
| category: | General Purpose |
| keywords: | IO, I²C |
| devices: | xcore.ai, xcore-200 |
I²C (Inter-Integrated Circuit) is a multi-master, multi-slave, synchronous, serial communication protocol used for communication between integrated circuits on the same board. Developed by Philips, it requires only two lines: the SDA (Serial Data Line) for data transfer and SCL (Serial Clock Line) for clock signals. I²C is popular in applications for connecting low-speed peripherals like sensors, EEPROMs, and ADCs. It supports various data rates, typically up to 3.4 Mbps in Fast Mode Plus and Ultra-Fast Mode, and allows multiple devices to share the same bus.
lib_i2c contains a software defined, industry-standard, I²C library that allows control of an
I²C bus via xcore ports.
lib_i2c provides both controller ("master") and peripheral ("slave") functionality.
The I²C master component can be used by multiple tasks within the xcore device (each addressing the same or different peripheral devices).
The library can also be used to implement multiple I²C physical interfaces on a single xcore device simultaneously.
- I²C controller (master) and I²C peripheral (slave) modes
- Supports speed up to 400 Kb/s (I²C Fast-mode)
- Clock stretching support
- Synchronous and asynchronous APIs
- The library has functions that wait on SCL high, through either an event or a polling loop. If these are called on a system where the pull up isn't present then the application can hang forever.
- XMOS XTC Tools: 15.3.0
- lib_xassert (www.github.com/xmos/lib_xassert)
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
This package is supported by XMOS Ltd. Issues can be raised against the software at www.xmos.com/support