Code and board files for an STM32F411 breakout board and the associated code. My plan is to code in Rust.
The Black Pill board I'm using has an STM32F411CEU6 (LQFP64 package).
Initial development has been done using a Black Pill board and a Micro 13 DOF IMU. The only connection is through I2C. The black pill board will supply power to the Micro board, with a 10uF Cap for power supply filtering.
The I2C pins used are:
| Function | Chip ID | Pin # | Black Pill Pin |
|---|---|---|---|
| I2C1_SCL | PB6 | 58 | Header 2, pin 14, B6 |
| I2C1_SDA | PB7 | 59 | Header 2, Pin 15, B7 |
Pullups are on the Micro board.
This breakout board contains the following sensors:
BMM150 - geomagnetic sensor from Bosch
BME680 – Low power gas, pressure, temperature and humidity sensor from Bosch
BMI088 – small, versatile 6Dof sensor module from Bosch
embedded_hal - Rust embedded system HAL https://crates.io/crates/embedded-hal
stm32f4 - Low level register definitions for STM32F4 libraries. https://crates.io/crates/stm32f4
stm32f4xx-hal - HAL abstractions for STM32F4 uC https://crates.io/crates/stm32f4xx-hal
BME680 - library for accessing the BME680 environmental sensor https://github.com/marcelbuesing/bme680
BMI160 - driver for BMI160 IMU, might be adaptable for the BMI088 https://crates.io/crates/bmi160
BMI088 - Driver for BMI088, needs I2C support added. https://crates.io/crates/bmi088
usbd-serial - USB CDC Serial driver build around embedded_hal https://crates.io/crates/usbd-serial
Communication is handled with Postcard and Serde. Each packet corresponds to the below structure, and contains the data for the associated packet in the data field.
The packet structure is as follows:
| Delimiter | Packet ID | Size | Data | Checksum | | "0xRW" denotes start of data. | Packet ID identifying the packet. | Size of the rest of the packet, not including this field | The data in Flatbuffers format | A Checksum |