Struct nrf52840_hal::Twim
source · pub struct Twim<T>(/* private fields */);
Expand description
Interface to a TWIM instance.
This is a very basic interface that comes with the following limitation:
The TWIM instances share the same address space with instances of SPIM,
SPIS, SPI, TWIS, and TWI. For example, TWIM0 conflicts with SPIM0, SPIS0,
etc.; TWIM1 conflicts with SPIM1, SPIS1, etc. You need to make sure that
conflicting instances are disabled before using Twim
. Please refer to the
product specification for more information (section 15.2 for nRF52832,
section 6.1.2 for nRF52840).
Implementations§
source§impl<T> Twim<T>where
T: Instance,
impl<T> Twim<T>where
T: Instance,
pub fn new(twim: T, pins: Pins, frequency: FREQUENCY_A) -> Twim<T>
sourcepub fn disable(&mut self)
pub fn disable(&mut self)
Disable the instance.
Disabling the instance will switch off the peripheral leading to a considerably lower energy use. However, while the instance is disabled it is not possible to use it for communication. The configuration of the instance will be retained.
sourcepub fn write(&mut self, address: u8, buffer: &[u8]) -> Result<(), Error>
pub fn write(&mut self, address: u8, buffer: &[u8]) -> Result<(), Error>
Write to an I2C slave.
The buffer must have a length of at most 255 bytes on the nRF52832 and at most 65535 bytes on the nRF52840.
sourcepub fn read(&mut self, address: u8, buffer: &mut [u8]) -> Result<(), Error>
pub fn read(&mut self, address: u8, buffer: &mut [u8]) -> Result<(), Error>
Read from an I2C slave.
The buffer must have a length of at most 255 bytes on the nRF52832 and at most 65535 bytes on the nRF52840.
sourcepub fn write_then_read(
&mut self,
address: u8,
wr_buffer: &[u8],
rd_buffer: &mut [u8]
) -> Result<(), Error>
pub fn write_then_read( &mut self, address: u8, wr_buffer: &[u8], rd_buffer: &mut [u8] ) -> Result<(), Error>
Write data to an I2C slave, then read data from the slave without triggering a stop condition between the two.
The buffers must have a length of at most 255 bytes on the nRF52832 and at most 65535 bytes on the nRF52840.
sourcepub fn copy_write_then_read(
&mut self,
address: u8,
wr_buffer: &[u8],
rd_buffer: &mut [u8]
) -> Result<(), Error>
pub fn copy_write_then_read( &mut self, address: u8, wr_buffer: &[u8], rd_buffer: &mut [u8] ) -> Result<(), Error>
Copy data into RAM and write to an I2C slave, then read data from the slave without triggering a stop condition between the two.
The write buffer must have a length of at most 255 bytes on the nRF52832 and at most 1024 bytes on the nRF52840.
The read buffer must have a length of at most 255 bytes on the nRF52832 and at most 65535 bytes on the nRF52840.