Driver for Bosch Sensortec BMA250 3-axis accelerometer.
http://ae-bst.resource.bosch.com/media/products/dokumente/bma250/BST-BMA250-DS002-05.pdf
This code has been tested using an Olimex STM32-405STK:
https://www.olimex.com/Products/ARM/ST/STM32-405STK/
| Parameter | Supported settings |
| Bandwidth (Hz) | 8, 16, 31, 63, 125, 250, 500, 1000 |
| Range (g) | ±2, ±4, ±8, ±16 |
| Communication | up to 400 kHz (I2C) and 10 MHz (SPI) |
| Macros | |
| BMA250_I2C_ADDR | BMA250 8-bit I2C address |
| Functions | |
| bma250_initialize_i2c | Initialize sensor on I2C bus |
| bma250_initialize_spi | Initialize sensor on SPI bus |
| bma250_read_chip_id | Read chip ID register |
| bma250_read_die_temperature | Read temperature |