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 two phases:

• first phase: get familiar with the hardware, the IIO subsystem then implement raw readings from the device.
• second phase: add support for buffered readings, triggers and power management.

For an application to be taken in consideration, a student must:

• send at least 5 cleanup patches for drivers/staging/ directory of the Linux kernel. See First kernel patch tutorial
• do some research work and find a sensor which doesn't have a Linux kernel driver. You can start searching here or here.

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>