Trait embedded_hal::blocking::i2c::Transactional

pub trait Transactional<A: AddressMode = SevenBitAddress> {
    type Error;

    // Required method
    fn exec<'a>(
        &mut self,
        address: A,
        operations: &mut [Operation<'a>]
    ) -> Result<(), Self::Error>;
}

Transactional I2C interface.

This allows combining operations within an I2C transaction.

Required Associated Types

type Error

Error type

Required Methods

fn exec<'a>( &mut self, address: A, operations: &mut [Operation<'a>] ) -> Result<(), Self::Error>

Execute the provided operations on the I2C bus.

Transaction contract:

• Before executing the first operation an ST is sent automatically. This is followed by SAD+R/W as appropriate.

• Data from adjacent operations of the same type are sent after each other without an SP or SR.

• Between adjacent operations of a different type an SR and SAD+R/W is sent.

• After executing the last operation an SP is sent automatically.

• If the last operation is a Read the master does not send an acknowledge for the last byte.

• ST = start condition

• SAD+R/W = slave address followed by bit 1 to indicate reading or 0 to indicate writing

• SR = repeated start condition

• SP = stop condition

Implementors