Crate opt40xx 

opt40xx

Barebones driver for OPT40xx ambient light sensor family based on embedded-hal traits. This sensor family uses almost the same register map for all its members.

Each member differ by:

• Calculation formula of lux values.
• Definition of their result registers (FIFO or different channel or both).
• Output interrupt mechanism.

It’s possible to fully support each member individually by introducing member marker generics. This driver does not track sensor state, it exposes an interface to set whole registers instead, to keep things simple.

Implemented:

• Read the measurement in raw value. See: read_raw().
• Read the conversion status. See: read_status().
• Configure main and secondary configurations. See: set_config_a() and set_config_b().
• Read the device ID. See: read_device_id().
• Set the low and high limits. (Low level side is implemented but not exposed).

Usage

use opt40xx::*;

let mut i2c = // i2c bus that implements e-hal trait.
let mut sensor = Sensor::new(i2c, Address::Gnd);

sensor.set_config_a(ConfigA {
    operating_mode: OperatingMode::Continuous,
    conv_time: ConversionTime::Ms25,
    ..Default::default()
})
.unwrap();

loop {
    let measurement = sensor.read_raw(Channel::Ch0, BurstRead::Enabled).unwrap();
    info!("measurement: {:?}, count: {:?}", measurement.0, measurement.1);
}

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Feature flags

• defmt — Use defmt for logging

Structs

ConfigA

Configuration settings for register A.

ConfigB

Configuration settings for register B.

Sensor

Sensor driver

Status

Enums

Address

Possible device addresses

BurstRead

I2C Burst Read mode

Channel

ConversionError

Driver data conversion error

ConversionTime

Conversion time

Error

All possible errors

FaultCount

Fault count

IntDirection

Interrupt pin direction

IntPolarity

Interrupt pin polarity

Latch

Interrupt reporting mode

OperatingMode

Operating mode

QuickWake

Quick Wake

Range

Light range