Trait embedded_hal::blocking::i2c::Transactional
source · [−]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
Required Methods
sourcefn exec<'a>(
&mut self,
address: A,
operations: &mut [Operation<'a>]
) -> Result<(), Self::Error>
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
Readthe 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