Crate hx711_spi

HX711 embedded-hal SPI driver crate

This is a platform agnostic driver to interface with the HX711 load cell IC. It uses SPI instad of bit banging. This driver is built using embedded-hal traits.

Usage

Use an embedded-hal implementation to get SPI. HX711 does not use CS and SCLK. Make sure that it is the only device on the bus. Connect the SDO to the PD_SCK and SDI to DOUT of the HX711. SPI clock frequency has to be between 20 kHz and 5 MHz.

use rppal::spi::{Spi, Bus, SlaveSelect, Mode};
use hx711_spi::{Hx711, HX711Mode};

let spi = Spi::new(Bus::Spi0, SlaveSelect::Ss0, 1_000_000, Mode::Mode0).unwrap();

// to create sensor with default configuration:
let mut scale = Hx711(spi);

// start measurements
let mut value = scale.readout().unwrap();

References

• Datasheet

• embedded-hal

Structs

Hx711

Represents an instance of a HX711 device

Enums

HX711Mode

The HX711 has two chanels: A for the load cell and B for AD conversion of other signals. Channel A supports gains of 128 (default) and 64, B has a fixed gain of 32.