I2C functions

Functions for using I2C bus. More...

Files
file	ruuvi_interface_i2c_bme280.h
	I2C read/write functions for Bosch BME280.
file	ruuvi_interface_i2c_tmp117.c
	I2C read/write functions for TI TMP117.
file	ruuvi_interface_i2c_tmp117.h
	I2C read/write functions for TI TMP117.

Macros
#define	TMP_ADDR_SIZE   (1U)
#define	TMP_REG_SIZE   (2U)
#define	TMP_TX_SIZE   (TMP_ADDR_SIZE + TMP_REG_SIZE)

Functions
int8_t	ri_i2c_bme280_write (uint8_t dev_id, uint8_t reg_addr, uint8_t *p_reg_data, uint16_t len)
	I2C write function for BME280.
int8_t	ri_i2c_bme280_read (uint8_t dev_id, uint8_t reg_addr, uint8_t *p_reg_data, uint16_t len)
	I2C Read function for BME280.
rd_status_t	ri_i2c_tmp117_write (const uint8_t dev_id, const uint8_t reg_addr, const uint16_t reg_val)
	I2C write function for TMP117.
rd_status_t	ri_i2c_tmp117_read (const uint8_t dev_id, const uint8_t reg_addr, uint16_t *const reg_val)
	I2C Read function for TMP117.

Detailed Description

Functions for using I2C bus.

Macro Definition Documentation

TMP_ADDR_SIZE

#define TMP_ADDR_SIZE   (1U)

Definition at line 19 of file ruuvi_interface_i2c_tmp117.c.

TMP_REG_SIZE

#define TMP_REG_SIZE   (2U)

Definition at line 20 of file ruuvi_interface_i2c_tmp117.c.

TMP_TX_SIZE

#define TMP_TX_SIZE   (TMP_ADDR_SIZE + TMP_REG_SIZE)

Definition at line 21 of file ruuvi_interface_i2c_tmp117.c.

Function Documentation

ri_i2c_bme280_read()

int8_t ri_i2c_bme280_read	(	uint8_t	dev_id,
		uint8_t	reg_addr,
		uint8_t *	p_reg_data,
		uint16_t	len
	)

I2C Read function for BME280.

Binds Ruuvi Interface I2C functions into official Bosch BME280 driver.

Parameters

[in]	dev_id	I2C functions interface handle, i.e. I2C addess of BME280.
[in]	reg_addr	BME280 register address to read.
[in]	p_reg_data	pointer to data to be received.
[in]	len	length of data to be received.

Warning

I2C address depends on BME280 SDO logic level

Returns

negative number on error

0 on success

positive number on warning

ri_i2c_bme280_write()

int8_t ri_i2c_bme280_write	(	uint8_t	dev_id,
		uint8_t	reg_addr,
		uint8_t *	p_reg_data,
		uint16_t	len
	)

I2C write function for BME280.

Binds Ruuvi Interface I2C functions into official Bosch BME280 driver.

Parameters

[in]	dev_id	I2C functions interface handle, i.e. I2C addess of BME280.
[in]	reg_addr	BME280 register address to write.
[in]	p_reg_data	pointer to data to be written.
[in]	len	length of data to be written.

Warning

I2C address depends on BME280 SDO logic level

Returns

negative number on error

0 on success

positive number on warning

ri_i2c_tmp117_read()

rd_status_t ri_i2c_tmp117_read	(	const uint8_t	dev_id,
		const uint8_t	reg_addr,
		uint16_t *const	reg_val
	)

I2C Read function for TMP117.

Binds Ruuvi Interface I2C functions for TMP117

Parameters

[in]	dev_id	I2C functions interface handle, i.e. I2C addess of TMP117.
[in]	reg_addr	TMP117 register address to read.
[in]	reg_val	pointer to 16-bit data to be received.

Returns

RD_SUCCESS on success

RD_ERROR_TIMEOUT if device does not respond on bus

Definition at line 33 of file ruuvi_interface_i2c_tmp117.c.

ri_i2c_tmp117_write()

rd_status_t ri_i2c_tmp117_write	(	const uint8_t	dev_id,
		const uint8_t	reg_addr,
		const uint16_t	reg_val
	)

I2C write function for TMP117.

Parameters

[in]	dev_id	I2C functions interface handle, i.e. I2C addess of TMP117
[in]	reg_addr	TMP117 register address to write.
[in]	reg_val	16-bit value to be written

Returns

RD_SUCCESS on success

RD_ERROR_TIMEOUT if device does not respond on bus

Definition at line 23 of file ruuvi_interface_i2c_tmp117.c.