Crate ruspiro_i2c

Raspberry Pi I²C bus interface

Simple access to the I²C bus available on the Raspberry Pi. When the I²C bus is used this reserves the GPIO pins 2 and 3 for exclusive use by the bus.

Usage

    I2C.take_for(|i2c| {
        if i2c.initialize(250_000_000, true).is_ok() {
            println!("scan I2C devices connected to RPi");
            let devices = i2c.scan().unwrap();
            for d in devices {
                println!("device detected at 0x{:2X}", d);
            }
        }
    });

To work with a device connected to the I²C bus it's recommended to first check whether this is connected at the specific address. This could be done like so:

    let device_addr = 0x68;
    // check if device is connected
    I2C.take_for(|i2c| {
        if i2c.check_device(device_addr).is_ok() {
            // now that we know the device exists and is connected to something with it
        }
    });

Once done simple use the funtions to write to or read from the device registers as required.

Features

• ruspiro_pi3 is active by default and ensures the proper MMIO base address is used for Raspberry Pi 3

Structs

I2cImpl

I²C peripheral representation

Statics

I2C	Static singleton accessor for the I²C bus peripheral To use the contained i2c API in a safe way use the take_for function passing a clousure that can safely use the resource

Type Definitions

I2cResult