Driver for the Rohm BH1900NUX Temperature sensor. More...

Detailed Description

Driver for the Rohm BH1900NUX Temperature sensor.

Files
file	bh1900nux_params.h
	Default configuration for BH1900NUX devices.

file	bh1900nux.h
	Interface definition for the BH1900NUX temperature sensor.

Data Structures
struct	bh1900nux_t
	Device descriptor for BH1900NUX devices. More...

struct	bh1900nux_params_t
	Set of configuration parameters for BH1900NUX devices. More...

Macros
#define	BH1900NUX_DEFAULT_ADDR BH1900NUX_ADDR_1
	Default address of BH1900NUX sensors.

#define	BH1900NUX_I2C_MAX_CLK I2C_SPEED_FAST
	Maximum I2C bus speed to use with the device.

Enumerations
enum	{ BH1900NUX_OK = 0 , BH1900NUX_ERR_I2C = -1 }
	Status and error return codes. More...

Functions
int	bh1900nux_init (bh1900nux_t dev, const bh1900nux_params_t params)
	Initialize the given BH1900NUX device.

int	bh1900nux_read (const bh1900nux_t dev, int16_t temp)
	Read the temperature measerd by the device [MILICELSIUS].

Possible I2C bus addresses of the device
The actual address of the device depends on the states of the slave address pins.
#define	BH1900NUX_ADDR_1 (0x48)
	A2:L A1:L A0:L.

#define	BH1900NUX_ADDR_2 (0x49)
	A2:L A1:L A0:H.

#define	BH1900NUX_ADDR_3 (0x4a)
	A2:L A1:H A0:L.

#define	BH1900NUX_ADDR_4 (0x4b)
	A2:L A1:H A0:H.

#define	BH1900NUX_ADDR_5 (0x4c)
	A2:H A1:L A0:L.

#define	BH1900NUX_ADDR_6 (0x4d)
	A2:H A1:L A0:H.

#define	BH1900NUX_ADDR_7 (0x4e)
	A2:H A1:H A0:L.

#define	BH1900NUX_ADDR_8 (0x4f)
	A2:H A1:H A0:H.

Temperature register address
Address of the temperature resister
#define	BH1900NUX_REG_ADDR (0x00)

Macro Definition Documentation

◆ BH1900NUX_ADDR_1

#define BH1900NUX_ADDR_1 (0x48)

A2:L A1:L A0:L.

Definition at line 36 of file bh1900nux.h.

◆ BH1900NUX_ADDR_2

#define BH1900NUX_ADDR_2 (0x49)

A2:L A1:L A0:H.

Definition at line 37 of file bh1900nux.h.

◆ BH1900NUX_ADDR_3

#define BH1900NUX_ADDR_3 (0x4a)

A2:L A1:H A0:L.

Definition at line 38 of file bh1900nux.h.

◆ BH1900NUX_ADDR_4

#define BH1900NUX_ADDR_4 (0x4b)

A2:L A1:H A0:H.

Definition at line 39 of file bh1900nux.h.

◆ BH1900NUX_ADDR_5

#define BH1900NUX_ADDR_5 (0x4c)

A2:H A1:L A0:L.

Definition at line 40 of file bh1900nux.h.

◆ BH1900NUX_ADDR_6

#define BH1900NUX_ADDR_6 (0x4d)

A2:H A1:L A0:H.

Definition at line 41 of file bh1900nux.h.

◆ BH1900NUX_ADDR_7

#define BH1900NUX_ADDR_7 (0x4e)

A2:H A1:H A0:L.

Definition at line 42 of file bh1900nux.h.

◆ BH1900NUX_ADDR_8

#define BH1900NUX_ADDR_8 (0x4f)

A2:H A1:H A0:H.

Definition at line 43 of file bh1900nux.h.

◆ BH1900NUX_DEFAULT_ADDR

#define BH1900NUX_DEFAULT_ADDR BH1900NUX_ADDR_1

Default address of BH1900NUX sensors.

Definition at line 58 of file bh1900nux.h.

◆ BH1900NUX_I2C_MAX_CLK

#define BH1900NUX_I2C_MAX_CLK I2C_SPEED_FAST

Maximum I2C bus speed to use with the device.

Definition at line 63 of file bh1900nux.h.

◆ BH1900NUX_REG_ADDR

#define BH1900NUX_REG_ADDR (0x00)

Definition at line 52 of file bh1900nux.h.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Status and error return codes.

Enumerator
BH1900NUX_OK	everything was fine
BH1900NUX_ERR_I2C	error initializing the I2C bus

Definition at line 68 of file bh1900nux.h.

Function Documentation

◆ bh1900nux_init()

int bh1900nux_init	(	bh1900nux_t *	dev,
		const bh1900nux_params_t *	params
	)

Initialize the given BH1900NUX device.

Parameters

[out]	dev	device descriptor of the targeted device
[in]	params	device configuration (i2c bus, address and bus clock)

Returns: 0 on success; -1 if unable to speak to the device

◆ bh1900nux_read()

int bh1900nux_read	(	const bh1900nux_t *	dev,
		int16_t *	temp
	)

Read the temperature measerd by the device [MILICELSIUS].

The result value is the measured temperature in MILICELSUIS and ranges from -30 to 95.