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

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

Transactional I2C interface.

This allows combining operations within an I2C transaction.

Required Associated Types

Error type

Required Methods

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