F439_CPP_MPL3115A2_Project_01 Documentation

This documentation covers a small STM32 Nucleo-F439ZI tutorial project that reads pressure and temperature from an MPL3115A2 sensor over I2C and prints the converted values through USART1.

Project Overview

The firmware demonstrates:

• STM32F439ZI peripheral setup generated by STM32CubeMX
• I2C communication with the MPL3115A2 pressure sensor
• Sensor initialization and WHO_AM_I verification
• Pressure conversion to inches of mercury
• Temperature conversion to Fahrenheit for serial output
• Basic I2C bus recovery for a stuck bus during startup

Project-Level Documentation

• Firmware Architecture Overview
• Firmware Architecture Groups
• Application Layer
• MPL3115A2 Sensor Driver Layer
• STM32 HAL / CubeMX Layer
• MPL3115A2 Driver Subsystem
• MPL3115A2 I2C Communication Flow
• MPL3115A2 Register Usage

Architectural Direction

The documentation is intentionally small but project-level. It mirrors the larger LoRa documentation format while staying appropriate for a single-sensor tutorial project.