efr32mg12-mpl3115a2-driver

This is a basic driver for periodic measurements with the MPL3115A2 sensor connected to a Thunderboard Sense 2 (BRD4166A, EFR32MG12) board.

Development environment

Software

• IDE: Simplicity Studio Version: SV4.1.13.7
• SDK: Gecko SDK Suite: Bluetooth 2.13.4.0, version 2.7.4
• Compiler: GNU ARM v7.2.1
• Serial terminal: Realterm: Serial Capture Program 2.0.0.70

  Hardware

• Test hardware: SLTB004A Thunderboard Sense 2

Embedded software project

I developed and tested in the Simplicity Studio IDE. I started with the soc-thunderboard project, then I removed the unnecessary parts and modified it for the MPL3115A2 sensor.

Serial logging

I logged some useful debug information and the measurements to the VCOM:

Altitude mode

In the Altitude mode I can read the altitude in meter and the temperature in Celsius degree from the sensor:

Barometer mode

In the Barometer mode I can read the pressure in Pascal and the temperature in Celsius degree from the sensor:

Useful links

• Xtrinsic MPL3115A2 I2C Precision Altimeter Data Sheet from Freescale Semiconductor
• Arduino driver for the MPL3115A2 sensor from Adafruit
• UG309: Thunderboard Sense 2 User’s Guide from Silicon Labs