embedded-ccs811 1.0.0

Platform-agnostic Rust driver for the CCS811 ultra-low power digital gas sensor for monitoring indoor air quality.
Documentation 
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use embedded_ccs811::{prelude::*, Error};
use embedded_hal_mock::eh1::{
    delay::NoopDelay as NoDelay,
    digital::{Mock as PinMock, State as PinState, Transaction as PinTrans},
    i2c::Transaction as I2cTrans,
};
mod common;
use crate::common::{destroy, new, BitFlags as BF, Register, DEV_ADDR};

#[test]
fn can_start_app_mode() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let transactions = [
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![BF::APP_VALID]),
        I2cTrans::write(DEV_ADDR, vec![Register::APP_START]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
    ];
    let sensor = new(&transactions, nwake);
    let sensor = sensor.start_application().ok().unwrap();
    destroy(sensor);
}

#[test]
fn cannot_start_app_mode_invalid_app() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let transactions = [I2cTrans::write_read(
        DEV_ADDR,
        vec![Register::STATUS],
        vec![0],
    )];
    let sensor = new(&transactions, nwake);
    let result = sensor.start_application().err().unwrap();
    match result.error {
        Error::NoValidApp => (),
        _ => panic!("Invalid error"),
    }
    destroy(result.dev);
}

#[test]
fn can_verify_app() {
    let nwake = PinMock::new(&[
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
    ]);
    let transactions = [
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write(DEV_ADDR, vec![Register::APP_VERIFY]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![BF::APP_VERIFY]),
    ];
    let mut sensor = new(&transactions, nwake);
    sensor
        .verify_application()
        .expect_err("Should have returned nb::Error::WouldBlock");
    sensor
        .verify_application()
        .expect_err("Should have returned nb::Error::WouldBlock");
    sensor.verify_application().unwrap();
    destroy(sensor);
}

#[test]
fn can_erase_app() {
    let nwake = PinMock::new(&[
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
        PinTrans::set(PinState::Low),
        PinTrans::set(PinState::High),
    ]);
    let transactions = [
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write(DEV_ADDR, vec![Register::APP_ERASE, 0xE7, 0xA7, 0xE6, 0x09]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![BF::APP_ERASE]),
    ];
    let mut sensor = new(&transactions, nwake);
    sensor
        .erase_application()
        .expect_err("Should have returned nb::Error::WouldBlock");
    sensor
        .erase_application()
        .expect_err("Should have returned nb::Error::WouldBlock");
    sensor.erase_application().unwrap();
    destroy(sensor);
}

#[test]
fn cannot_download_wrong_size_app() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let mut sensor = new(&[], nwake);
    assert_error!(
        sensor.download_application(&[0, 1, 2, 3, 4, 5, 6, 7, 8], &mut NoDelay::new()),
        Error::InvalidInputData
    );
    destroy(sensor);
}

#[test]
fn can_download_app() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let transactions = [
        I2cTrans::write(
            DEV_ADDR,
            vec![Register::REG_BOOT_APP, 0, 1, 2, 3, 4, 5, 6, 7],
        ),
        I2cTrans::write(
            DEV_ADDR,
            vec![Register::REG_BOOT_APP, 8, 9, 10, 11, 12, 13, 14, 15],
        ),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
    ];
    let mut sensor = new(&transactions, nwake);
    sensor
        .download_application(
            &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
            &mut NoDelay::new(),
        )
        .unwrap();
    destroy(sensor);
}

#[test]
fn can_update_app() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let transactions = [
        I2cTrans::write(DEV_ADDR, vec![Register::SW_RESET, 0x11, 0xE5, 0x72, 0x8A]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write(DEV_ADDR, vec![Register::APP_ERASE, 0xE7, 0xA7, 0xE6, 0x09]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![BF::APP_ERASE]),
        I2cTrans::write(
            DEV_ADDR,
            vec![Register::REG_BOOT_APP, 0, 1, 2, 3, 4, 5, 6, 7],
        ),
        I2cTrans::write(
            DEV_ADDR,
            vec![Register::REG_BOOT_APP, 8, 9, 10, 11, 12, 13, 14, 15],
        ),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write(DEV_ADDR, vec![Register::APP_VERIFY]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![0]),
        I2cTrans::write_read(DEV_ADDR, vec![Register::STATUS], vec![BF::APP_VERIFY]),
    ];
    let mut sensor = new(&transactions, nwake);
    sensor
        .update_application(
            &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
            &mut NoDelay::new(),
        )
        .unwrap();
    destroy(sensor);
}

#[test]
fn can_do_software_reset() {
    let nwake = PinMock::new(&[PinTrans::set(PinState::Low), PinTrans::set(PinState::High)]);
    let transactions = [I2cTrans::write(
        DEV_ADDR,
        vec![Register::SW_RESET, 0x11, 0xE5, 0x72, 0x8A],
    )];
    let mut sensor = new(&transactions, nwake);
    sensor.software_reset().unwrap();
    destroy(sensor);
}