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HardFOC driver

BMP581 Driver

A header-only C++17 driver for the Bosch BMP581 barometric pressure sensor. It checks the chip, sets oversampling, output data rate, IIR filter and power mode in the order the datasheet requires, and reads pressure in pascals and temperature in degrees Celsius, on any MCU with I2C or SPI.

Quickstart API guide Source on GitHub

The driver has no platform code. You give it a small class that reads and writes registers over I2C or SPI and waits; it does the rest: the chip-id and NVM checks, the standby hop before every mode change, IIR writes in standby, 24-bit decoding and error codes.

Barometric pressure sensor BMP581 Bosch Sensortec
Measures
Absolute pressure 30 to 125 kPa and temperature -40 to 85 °C, 24-bit each
Accuracy
±30 Pa absolute (typical, 300 to 1100 hPa, -5 to 65 °C); 0.08 Pa RMS noise at the highest resolution
Host interface
I2C up to 1 MHz at 0x46 or 0x47, SPI mode 0 or 3 up to 12 MHz (4- or 3-wire), I3C
Supply
VDD 1.71 V to 3.6 V, VDDIO 1.08 V to 3.6 V, independent
Output data rate
0.125 Hz to 240 Hz in normal mode, up to 480 Hz in continuous mode
Package
10-pin metal-lid LGA, 2.0 × 2.0 × 0.75 mm
Driver uses
Register access over I2C or SPI; data-ready polling or the INT pin. FIFO and out-of-range detection are not wrapped

Datasheet · Product page · Bosch BMP5 Sensor API

What you get

  • One object per sensor. bmp581::Driver<YourBus> with Init(), Configure(), DataReady() and ReadSample() for the common path. See API guide.
  • The datasheet's sequences, done for you. Power-mode changes go through standby, IIR writes happen in standby and the previous mode comes back, NVM reads wait for nvm_rdy. See Register interface.
  • A preset for a pressure reference. BarometricReferencePreset(): 100 Hz, pressure OSR ×8, IIR 3. See Configuration.
  • Typed results. Every call returns DriverResult<T> with a stable DriverError code and ToString() for logs.
  • Zero-overhead portability. The port is a CRTP class with four methods: no virtual calls, no heap, no RTOS dependency. See Porting.
  • Tested without hardware. Host unit tests run the driver against a register-map model of the chip. See Testing and CI.

Where to go next

  • Quickstart

    Wire the sensor, write the port, read pressure in about 15 lines.

  • Hardware

    Pins, address selection, bus settings, timing and supply.

  • Architecture

    The three layers and what each one owns.

  • API guide

    Initialise, configure, read and handle errors, task by task.

  • Porting

    Implement the register transport for your MCU.

  • API reference

    Every class and member, generated from the headers.