pritham13 / stm32_bmp280

BMP280 Driver

This repository contains the driver code for interfacing with the BMP280 sensor using I2C communication. The BMP280 is a barometric pressure sensor that can measure temperature and pressure.

Files

• BMP280.h - Header file containing function declarations and necessary macros.
• BMP280.c - Source file containing function definitions for interacting with the BMP280 sensor.

Functions

BMP280CheckStatus

void BMP280CheckStatus(I2C_HandleTypeDef &hi2c);

Checks if the BMP280 sensor is connected and ready for communication.

• Parameters: hi2c - I2C handle.
• Returns: Prints "BMP280 found" if the sensor is ready, otherwise prints "BMP280 not found".

register_read_8

uint8_t register_read_8(I2C_HandleTypeDef &hi2c, uint16_t MemAddress);

Reads an 8-bit value from the specified register.

• Parameters:
  • hi2c - I2C handle.
  • MemAddress - Memory address to read from.
• Returns: The 8-bit value read from the specified register.

register_write_8

void register_write_8(I2C_HandleTypeDef &hi2c, uint16_t MemAddress, uint8_t * pData);

Writes an 8-bit value to the specified register.

• Parameters:
  • hi2c - I2C handle.
  • MemAddress - Memory address to write to.
  • pData - Pointer to the data to be written.

register_read_16

uint16_t register_read_16(I2C_HandleTypeDef &hi2c, uint16_t MemAddress);

Reads a 16-bit value from the specified register.

• Parameters:
  • hi2c - I2C handle.
  • MemAddress - Memory address to read from.
• Returns: The 16-bit value read from the specified register.

register_read_16_LE

uint16_t register_read_16_LE(I2C_HandleTypeDef &hi2c, uint16_t MemAddress);

Reads a 16-bit value from the specified register and converts it to little-endian format.

• Parameters:
  • hi2c - I2C handle.
  • MemAddress - Memory address to read from.
• Returns: The 16-bit value in little-endian format.

register_read_24

uint32_t register_read_24 (I2C_HandleTypeDef &hi2c, uint16_t MemAddress);

Reads a 24-bit value from the specified register.

• Parameters:
  • hi2c - I2C handle.
  • MemAddress - Memory address to read from.
• Returns: The 24-bit value read from the specified register.

BMP280_init

void BMP280_init(I2C_HandleTypeDef *pI2cHandle);

Initializes the BMP280 sensor by writing to the control and config registers.

• Parameters: pI2cHandle - Pointer to the I2C handle.

BMP280_Read_Calib_Data

void BMP280_Read_Calib_Data(I2C_HandleTypeDef &hi2c);

Reads calibration data from the BMP280 sensor.

• Parameters: hi2c - I2C handle.

BMP280_read_Temperature

float BMP280_read_Temperature(I2C_HandleTypeDef &i2c);

Reads and calculates the temperature from the BMP280 sensor.

• Parameters: i2c - I2C handle.
• Returns: The temperature in degrees Celsius.

BMP280_read_Pressure

float BMP280_read_Pressure();

Reads and calculates the pressure from the BMP280 sensor.

• Returns: The pressure in Pascals.

Usage

1. Initialize the I2C handle.
2. Call BMP280CheckStatus to ensure the BMP280 sensor is connected.
3. Use BMP280_init to initialize the sensor.
4. Call BMP280_Read_Calib_Data to read the sensor's calibration data.
5. Use BMP280_read_Temperature and BMP280_read_Pressure to read temperature and pressure values, respectively.

License

This project is licensed under the MIT License.

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Feel free to contribute to this repository by creating pull requests or reporting issues. For any questions, please open an issue or contact the repository owner.