#esp32 #pcf8574 #pcf8575

pcf857x-simple

A very simple manager of PCF8574 and PCF8575

3 unstable releases

0.2.0 Apr 10, 2024
0.1.1 Mar 23, 2024
0.1.0 Mar 14, 2024

#1091 in Hardware support

MIT license

17KB
236 lines

Manager of PFC8574 and PFC8575.

This crate is very simple manager of hardware pcf8574 and pcf8575.

Crate was tested on ESP32 WROOM-32.

See rust documentation.

Compatibility

pcf857x-simple embedded-hal
0.1.x v0.2.x
0.2.x v0.2.x

Example of use

use std::thread;
use std::time::Duration;

use esp_idf_hal::units::KiloHertz;
use esp_idf_sys as _;
use esp_idf_hal::peripherals::Peripherals;
use esp_idf_hal::i2c::I2cDriver;
use esp_idf_hal::i2c::config::Config;
use pcf857x_simple::pcf8574::Pcf8574;
use pcf857x_simple::{Pin, PinState, PCF857X_DEFAULT_ADDRESS};

fn main() {
    esp_idf_sys::link_patches();
    esp_idf_svc::log::EspLogger::initialize_default();

    let peripherals = Peripherals::take().unwrap();

    let scl = peripherals.pins.gpio22;
    let sda = peripherals.pins.gpio21;

    let i2c_config = Config::new()
      .baudrate(KiloHertz(100).into())
      .scl_enable_pullup(true)
      .sda_enable_pullup(true);

    let mut i2c_driver = I2cDriver::new(peripherals.i2c0, sda, scl, &i2c_config).unwrap();

    let mut expander = Pcf8574::new(&mut i2c_driver, PCF857X_DEFAULT_ADDRESS);

    loop {
      let _ = expander.clear();

      println!("All off");
      thread::sleep(Duration::from_millis(1000));

      let _ = expander.up_pins(&[Pin::P0]).unwrap();
      println!("P0 on");

      thread::sleep(Duration::from_millis(1000));

      let _ = expander.up_pins(&[Pin::P1]).unwrap();
      println!("P0, P1 on");

      thread::sleep(Duration::from_millis(1000));

      let _ = expander.up_pins(&[Pin::P2]).unwrap();
      println!("P0, P1, P2 on");

      thread::sleep(Duration::from_millis(1000));

      let _ = expander.set_pins(&[PinState::Up(Pin::P0), PinState::Down(Pin::P1), PinState::Down(Pin::P2)]);
      println!("P0 = on, P1 = off, P2 = off");

      thread::sleep(Duration::from_millis(1000));
    }
}

Dependencies

~71KB