Silicon Labs Si7021 temperature / humidity sensor driver

Sensor interface for Silicon Labs Si7021 temperature / humidity sensor. More...

Collaboration diagram for Silicon Labs Si7021 temperature / humidity sensor driver:

Macros
#define	SIF_SAD_SI7021   0x40 /* Si7021 temperature / humidity sensor */
#define	SIF_SI7021_MODE   SIF_SI7021_MODE_HOLD_MASTER
#define	SIF_SI7021_TCONV_MAX_TEMP   10 /* temperature */
#define	SIF_SI7021_TCONV_MAX_HUM   20 /* humidity */

Enumerations
enum	sif_si7021_mode { SIF_SI7021_MODE_HOLD_MASTER , SIF_SI7021_MODE_NACK_WAIT , SIF_SI7021_MODE_TCONV_WAIT }

Functions
u8_t	SIF_SI7021_ReadTemperature (void)
	SI7021: Read Temperature. More...
u8_t	SIF_SI7021_ReadHumidity (void)
	SI7021: Read Humidity. More...
void	SIF_SI7021_Reset (void)
	SI7021: Soft Reset Command. More...
u8_t	SIF_SI7021_ReadID (void)
	SI7021: Read ID byte of Electronic Serial Number. More...

Detailed Description

Sensor interface for Silicon Labs Si7021 temperature / humidity sensor.

Macro Definition Documentation

SIF_SAD_SI7021

#define SIF_SAD_SI7021   0x40 /* Si7021 temperature / humidity sensor */

SIF_SI7021_MODE

#define SIF_SI7021_MODE   SIF_SI7021_MODE_HOLD_MASTER

SIF_SI7021_TCONV_MAX_HUM

#define SIF_SI7021_TCONV_MAX_HUM   20 /* humidity */

SIF_SI7021_TCONV_MAX_TEMP

#define SIF_SI7021_TCONV_MAX_TEMP   10 /* temperature */

Enumeration Type Documentation

sif_si7021_mode

enum sif_si7021_mode

Enumerator
SIF_SI7021_MODE_HOLD_MASTER
SIF_SI7021_MODE_NACK_WAIT	SIF_SI7021_MODE_HOLD_MASTER.
SIF_SI7021_MODE_TCONV_WAIT	SIF_SI7021_MODE_NACK_WAIT.

Function Documentation

SIF_SI7021_ReadHumidity()

u8_t SIF_SI7021_ReadHumidity

(

void

)

SI7021: Read Humidity.

Returns

Humidity in % (0 to 100 %)

SIF_SI7021_ReadID()

u8_t SIF_SI7021_ReadID

(

void

)

SI7021: Read ID byte of Electronic Serial Number.

Returns

Sensr ID

SIF_SI7021_ReadTemperature()

u8_t SIF_SI7021_ReadTemperature

(

void

)

SI7021: Read Temperature.

Returns

Temperature in 'C, 1s complement (-128 to +127 'C)

SIF_SI7021_Reset()

void SIF_SI7021_Reset

(

void

)

SI7021: Soft Reset Command.