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The main purpose of the Industrial I/O subsystem (IIO) is to provide support for devices that in some sense perform either analog-to-digital conversion (ADC) or digital-to-analog conversion (DAC) or both. Devices that fall into this category include: ADCs, DACs, accelerometers, gyroscopes, color and light sensors, pressure sensors, magnetometers, VOC sensors, etc.

The goal of this project is to write a driver for Bosch BME680 temperature, barometric, pressure and VOC gas sensor using the Industrial I/O interface. The project is split in the following subtasks:

• get familiar with IIO subsystem, I2C and SPI API.
• create skeleton driver registering an IIO device
• add IIO channel for humidity
• add IIO channel for temperature
• add IIO channel for pressure
• add IIO channel for VOC
• add support for buffer readings for each of the supported channels
• add support for power manangement

Desired knowledge:

• comfortable with C
• basic low level programming concepts (files, memory, buses)

Code license: GPL

Just to have an idea on how this project works here is a list of successful past projects:

• CCS811 Air Quality Sensor
• LTC2485 Analog to Digital Converter
• ADXL345 accelerometer
• ISL29018 digital ambient light and proximity sensor
• MAX5487 digital potentiometer

A project is considered successful if the code is accepted into Linux kernel IIO maintainer's tree.

IRC: #linux-iio, on irc.oftc.net server.

Mentor: Daniel Baluta <daniel.baluta at nxp dot com>