Function pointers

Platform speicific functions. More...

Collaboration diagram for Function pointers:

Typedefs
typedef int8_t(*	bme280_readregisters) (uint8_t reg_addr, uint8_t *rxbuff, uint8_t rxlen, void *driver)
typedef int8_t(*	bme280_writeregister) (uint8_t reg_addr, uint8_t value, void *driver)
typedef void(*	bme280_delayms) (uint8_t delay_time)

Detailed Description

Platform speicific functions.

These functions have to be created by user and set as members of BME280_Driver_t structure

Typedef Documentation

bme280_delayms

typedef void(* bme280_delayms) (uint8_t delay_time)

Delay function.

Parameters

[in]

delay_time

time to delay in miliseconds

bme280_readregisters

typedef int8_t(* bme280_readregisters) (uint8_t reg_addr, uint8_t *rxbuff, uint8_t rxlen, void *driver)

Function to read the data from sensor's registers in burst mode.

Attention

when use I2C bus, function must control LSB of I2C address value! Check datasheet and examples

Parameters

[in]	reg_addr	address of register to be read (f.e. BME280_ID_ADDR)
[in]	*rxbuff	pointer to the buffer where data will be stored
[in]	rxlen	lenght of data to be read (in bytes)
[in]	*driver	pointer to BME280_Driver_t structure

Returns

0 success

-1 failure

bme280_writeregister

typedef int8_t(* bme280_writeregister) (uint8_t reg_addr, uint8_t value, void *driver)

Function to write data to a single register

Attention

when use I2C bus, function must control LSB of I2C address value! Check datasheet and examples

when use SPI bus, function must reset MSB of "reg_addr" value! Check datasheet and examples

Parameters

[in]	reg_addr	address of register to be written (f.e. BME280_RESET_ADDR)
[in]	value	value to write (f.e. BME280_RESET_VALUE)
[in]	*driver	pointer to BME280_Driver_t structure

Returns

0 success

-1 failure