Struct I2c

pub struct I2c<'d> { /* private fields */ }

Available on crate feature unstable only.

I2C (RTC) driver

Example

use esp_hal::i2c::rtc::{Config, I2c};
let mut i2c = I2c::new(
    peripherals.RTC_I2C,
    Config::default(),
    peripherals.GPIO1,
    peripherals.GPIO2,
)?;

let mut data = [0u8; 22];
i2c.read(DEVICE_ADDR, 0xaa, &mut data)?;

Implementations

impl<'d> I2c<'d>

pub fn new( i2c: RTC_I2C<'d>, config: Config, sda: impl Sda + 'd, scl: impl Scl + 'd, ) -> Result<Self, ConfigError>

Create a new I2C (RTC) instance.

Errors

A crate::i2c::rtc::ConfigError variant will be returned if bus frequency or timeout passed in config is invalid.

Example

use esp_hal::i2c::rtc::{Config, I2c};
let i2c = I2c::new(
    peripherals.RTC_I2C,
    Config::default(),
    peripherals.GPIO1,
    peripherals.GPIO2,
)?;

pub fn apply_config(&mut self, config: &Config) -> Result<(), ConfigError>

Applies a new configuration.

Errors

A crate::i2c::rtc::ConfigError variant will be returned if bus frequency or timeout passed in config is invalid.

Example

use core::time::Duration;

use esp_hal::i2c::rtc::{Config, I2c};
let mut i2c = I2c::new(
    peripherals.RTC_I2C,
    Config::default(),
    peripherals.GPIO1,
    peripherals.GPIO2,
)?;

i2c.apply_config(&Config::default().with_timeout(Duration::from_micros(100)))?;

pub fn write( &mut self, address: u8, register: u8, data: &[u8], ) -> Result<(), Error>

Writes bytes to slave with given address and register.

Example

use esp_hal::i2c::rtc::{Config, I2c};
const DEVICE_ADDR: u8 = 0x77;
let mut i2c = I2c::new(
    peripherals.RTC_I2C,
    Config::default(),
    peripherals.GPIO1,
    peripherals.GPIO2,
)?;

i2c.write(DEVICE_ADDR, 2, &[0xaa])?;

pub fn read( &mut self, address: u8, register: u8, data: &mut [u8], ) -> Result<(), Error>

Writes bytes to slave with given address and register.

Example

use esp_hal::i2c::rtc::{Config, I2c};
const DEVICE_ADDR: u8 = 0x77;
let mut i2c = I2c::new(
    peripherals.RTC_I2C,
    Config::default(),
    peripherals.GPIO1,
    peripherals.GPIO2,
)?;

let mut data = [0u8; 22];
i2c.read(DEVICE_ADDR, 7, &mut data)?;

Trait Implementations

impl Drop for I2c<'_>

fn drop(&mut self)

Executes the destructor for this type.