bmp180: Driver for BMP180 digital pressure sensor

Defines

BMP180_DEVICE_ADDRESS

I2C address.

Enums

enum bmp180_mode_t

Hardware accuracy mode.

See Table 3 of the datasheet

Values:

enumerator BMP180_MODE_ULTRA_LOW_POWER

1 sample, 4.5 ms

enumerator BMP180_MODE_STANDARD

2 samples, 7.5 ms

enumerator BMP180_MODE_HIGH_RESOLUTION

4 samples, 13.5 ms

enumerator BMP180_MODE_ULTRA_HIGH_RESOLUTION

8 samples, 25.5 ms

Functions

esp_err_t bmp180_init_desc(bmp180_dev_t *dev, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio)

Initialize device descriptor.

Parameters:

dev – Device descriptor

port – I2C port number

sda_gpio – GPIO pin number for SDA

scl_gpio – GPIO pin number for SCL

Returns:

ESP_OK on success

esp_err_t bmp180_free_desc(bmp180_dev_t *dev)

Free device descriptor.

Parameters:

dev – Pointer to BMP180 device descriptor

Returns:

ESP_OK on success

esp_err_t bmp180_init(bmp180_dev_t *dev)

Initialize device.

Parameters:

dev – Pointer to BMP180 device descriptor

Returns:

ESP_OK on success

esp_err_t bmp180_measure(bmp180_dev_t *dev, float *temperature, uint32_t *pressure, bmp180_mode_t oss)

Measure temperature and pressure.

Parameters:

dev – Pointer to BMP180 device descriptor

temperature – [out] Temperature in degrees Celsius

pressure – [out] Pressure in Pa

oss – Measurement mode

Returns:

ESP_OK on success

struct bmp180_dev_t

#include <bmp180.h>

BMP180 device descriptor.

Public Members

i2c_dev_t i2c_dev

int16_t AC1

int16_t AC2

int16_t AC3

uint16_t AC4

uint16_t AC5

uint16_t AC6

int16_t B1

int16_t B2

int16_t MB

int16_t MC

int16_t MD