Module capsules::si7021 [−] [src]

Driver for the Silicon Labs SI7021 temperature/humidity sensor.

https://www.silabs.com/products/sensors/humidity-sensors/Pages/si7013-20-21.aspx

The Si7006/13/20/21/34 devices are Silicon Labs’ latest generation I2C relative humidity and temperature sensors. All members of this device family combine fully factory-calibrated humidity and temperature sensor elements with an analog to digital converter, signal processing and an I2C host interface. Patented use of industry-standard low-K polymer dielectrics provides excellent accuracy and long term stability, along with low drift and low hysteresis. The innovative CMOS design also offers the lowest power consumption in the industry for a relative humidity and temperature sensor. The Si7013/20/21/34 devices are designed for high- accuracy applications, while the Si7006 is targeted toward lower-accuracy applications that traditionally have used discrete RH/T sensors.

Usage

let si7021_i2c = static_init!(
    capsules::virtual_i2c::I2CDevice,
    capsules::virtual_i2c::I2CDevice::new(i2c_bus, 0x40));
let si7021_virtual_alarm = static_init!(
    VirtualMuxAlarm<'static, sam4l::ast::Ast>,
    VirtualMuxAlarm::new(mux_alarm));
let si7021 = static_init!(
    capsules::si7021::SI7021<'static, VirtualMuxAlarm<'static, sam4l::ast::Ast>>,
    capsules::si7021::SI7021::new(si7021_i2c,
        si7021_virtual_alarm,
        &mut capsules::si7021::BUFFER));
si7021_i2c.set_client(si7021);
si7021_virtual_alarm.set_client(si7021);

Reexports

use core::cell::Cell;

use kernel;

use kernel::ReturnCode;

use kernel::common::take_cell::TakeCell;

use kernel::hil::i2c;

use kernel::hil::time;

use kernel::hil::time::Frequency;

Structs

SI7021

Enums

OnDeck
Registers
State	States of the I2C protocol with the LPS331AP.

Statics

BUFFER