BMx280

Bosch BME280/BMP280 pressure sensor light library. In original adopted for SMT32 Low Layer library but could be easily changed to any other platform.

BME280 datasheet

BMP280 datasheet

How to use

BMx280_HandleTypeDef bme280;

bme280.hi2c = I2C1;
bme280.address = 0x76;

BMx280_Config config = {
    .filter = BMx280_FILTER_4,
    .t_sb = BMx280_TIMESTBY_1000
};

BMx280_Oversampling oversampling = {
    .osrs_t = BMx280_OVERSAMPLING_4,
    .osrs_p = BMx280_OVERSAMPLING_2,
    .osrs_h = BMx280_OVERSAMPLING_1,
};

BMx280_Init(&bme280);
BMx280_SetConfig(&bme280, config);
BMx280_SetOversampling(&bme280, oversampling);
BMx280_SetMode(&bme280, BMx280_MODE_NORMAL);

BMx280_ReadMeasurements(&bme280);

float temperature = BMx280_GetTemperature(&bme280);
float pressure = BMx280_GetPressure(&bme280);
float humidity = BMx280_GetHumidity(&bme280);

Porting routine

1. Change includes in bmx280.h to proper for your MCU, also maybe you want to replace I2C with SPI
2. Change _BMx280_IO_Write8 and _BMx280_IO_Read functions in bmx280.c to implement read and write functionality according your MCU

Tested using

sensors:

• GY-BME280 (BME280 sensor)
• GY-91 (BMP280 sensor)

on boards:

• STM32 Nucleo-L073RZ
• STM32 L010F4