embassy/examples/nrf/src/bin/twim.rs

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2021-05-26 18:15:37 +02:00
//! Example on how to read a 24C/24LC i2c eeprom.
//!
//! Connect SDA to P0.03, SCL to P0.04
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_nrf::interrupt;
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use embassy_nrf::twim::{self, Twim};
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use {defmt_rtt as _, panic_probe as _};
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const ADDRESS: u8 = 0x50;
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_nrf::init(Default::default());
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info!("Initializing TWI...");
let config = twim::Config::default();
let irq = interrupt::take!(SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0);
let mut twi = Twim::new(p.TWISPI0, irq, p.P0_03, p.P0_04, config);
info!("Reading...");
let mut buf = [0u8; 16];
unwrap!(twi.blocking_write_read(ADDRESS, &mut [0x00], &mut buf));
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info!("Read: {=[u8]:x}", buf);
}