I2C RTIO loopback
Overview
This sample demonstrates how to perform I2C transfers, synchronously and async using RTIO. It uses up to two I2C controllers, acting as I2C controller and target.
Requirements
This sample requires either:
Two I2C controllers, one supporting the I2C controller role, one supporting the I2C peripheral role, both connected to the same I2C bus.
An I2C controller supporting both I2C controller and peripheral role simultaneously.
Note
Remember to set up the I2C bus, connecting SCL and SDA pull-up resistors, and connecting the relevant I2C controllers to the bus physically.
Board support
Any board which meets the requirements must use an overlay to specify which
I2C controller will act as the controller, and which as the peripheral, note
that this could be the same controller. This is done using the devicetree
aliases i2c-controller and i2c-controller-target respectively:
/ {
aliases {
i2c-controller = &i2c1;
i2c-controller-target = &i2c2;
};
};
If necessary, add any board specific configs to the board specific overlay:
CONFIG_I2C_TARGET_BUFFER_MODE=y