Si7013

Detailed Description

Macros
#define	SI7013_ADDR   0x82
#define	SI7013_DEVICE_ID   0x0D
#define	SI7020_DEVICE_ID   0x14
#define	SI7021_ADDR   0x80
#define	SI7021_DEVICE_ID   0x21

Functions
bool	Si7013_Detect (I2C_TypeDef *i2c, uint8_t addr, uint8_t *deviceId)
	Checks if a Si7013 is present on the I2C bus or not. More...
int32_t	Si7013_GetFirmwareRevision (I2C_TypeDef *i2c, uint8_t addr, uint8_t *fwRev)
	Reads Firmware Revision from a Si7013 sensor. More...
int32_t	Si7013_MeasureRHAndTemp (I2C_TypeDef *i2c, uint8_t addr, uint32_t *rhData, int32_t *tData)
	Reads relative humidity and temperature from a Si7013 sensor. More...
int32_t	Si7013_MeasureV (I2C_TypeDef *i2c, uint8_t addr, int32_t *vData)
	Reads relative humidity and temperature from a Si7013 sensor. More...
int32_t	Si7013_ReadNoHoldRHAndTemp (I2C_TypeDef *i2c, uint8_t addr, uint32_t *rhData, int32_t *tData)
	Reads relative humidity and temperature from a Si7013 sensor. More...
int32_t	Si7013_StartNoHoldMeasureRHAndTemp (I2C_TypeDef *i2c, uint8_t addr)
	Starts no hold measurement of relative humidity and temperature from a Si7013 sensor. More...

Macro Definition Documentation

#define SI7013_ADDR   0x82

I2C device address for Si7013

Definition at line 41 of file si7013.h.

#define SI7013_DEVICE_ID   0x0D

Device ID value for Si7013

Definition at line 47 of file si7013.h.

#define SI7020_DEVICE_ID   0x14

Device ID value for Si7020

Definition at line 49 of file si7013.h.

#define SI7021_ADDR   0x80

I2C device address for Si7021

Definition at line 43 of file si7013.h.

#define SI7021_DEVICE_ID   0x21

Device ID value for Si7021

Definition at line 51 of file si7013.h.

Function Documentation

bool Si7013_Detect	(	I2C_TypeDef *	i2c,
		uint8_t	addr,
		uint8_t *	deviceId
	)

Checks if a Si7013 is present on the I2C bus or not.

Parameters

[in]	i2c	The I2C peripheral to use (Not used).
[in]	addr	The I2C address to probe.
[out]	deviceId	Write device ID from SNB_3 if device responds. Pass in NULL to discard. Should be 0x0D for Si7013, 0x14 for Si7020 or 0x15 for Si7021

Returns

True if a Si70xx is detected, false otherwise.

Definition at line 407 of file si7013.c.

References I2C_TransferSeq_TypeDef::addr, I2C_TransferSeq_TypeDef::buf, I2C_TransferSeq_TypeDef::data, I2C_TransferSeq_TypeDef::flags, I2C_FLAG_WRITE_READ, I2CSPM_Transfer(), i2cTransferDone, and I2C_TransferSeq_TypeDef::len.

int32_t Si7013_GetFirmwareRevision	(	I2C_TypeDef *	i2c,
		uint8_t	addr,
		uint8_t *	fwRev
	)

Reads Firmware Revision from a Si7013 sensor.

Parameters

[in]	i2c	The I2C peripheral to use.
[in]	addr	The I2C address of the sensor.
[out]	fwRev	The internal firmware revision. 0xFF === 1.0

Returns

Returns zero on OK, non-zero otherwise.

Definition at line 157 of file si7013.c.

References I2C_TransferSeq_TypeDef::addr, I2C_TransferSeq_TypeDef::buf, I2C_TransferSeq_TypeDef::data, I2C_TransferSeq_TypeDef::flags, I2C_FLAG_WRITE_READ, I2CSPM_Transfer(), i2cTransferDone, and I2C_TransferSeq_TypeDef::len.

int32_t Si7013_MeasureRHAndTemp	(	I2C_TypeDef *	i2c,
		uint8_t	addr,
		uint32_t *	rhData,
		int32_t *	tData
	)

Reads relative humidity and temperature from a Si7013 sensor.

Parameters

[in]	i2c	The I2C peripheral to use.
[in]	addr	The I2C address of the sensor.
[out]	rhData	The relative humidity in percent (multiplied by 1000).
[out]	tData	The temperature in milli-Celsius.

Returns

Returns zero on OK, non-zero otherwise.

Definition at line 304 of file si7013.c.

int32_t Si7013_MeasureV	(	I2C_TypeDef *	i2c,
		uint8_t	addr,
		int32_t *	vData
	)

Reads relative humidity and temperature from a Si7013 sensor.

Parameters

[in]	i2c	The I2C peripheral to use.
[in]	addr	The I2C address of the sensor.
[out]	vData	The data read from the sensor.

Returns

Returns zero on OK, non-zero otherwise.

Definition at line 376 of file si7013.c.

int32_t Si7013_ReadNoHoldRHAndTemp	(	I2C_TypeDef *	i2c,
		uint8_t	addr,
		uint32_t *	rhData,
		int32_t *	tData
	)

Reads relative humidity and temperature from a Si7013 sensor.

Parameters

[in]	i2c	The I2C peripheral to use.
[in]	addr	The I2C address of the sensor.
[out]	rhData	The relative humidity in percent (multiplied by 1000).
[out]	tData	The temperature in milli-Celsius.

Returns

Returns zero on OK, non-zero otherwise.

Definition at line 261 of file si7013.c.

int32_t Si7013_StartNoHoldMeasureRHAndTemp	(	I2C_TypeDef *	i2c,
		uint8_t	addr
	)

Starts no hold measurement of relative humidity and temperature from a Si7013 sensor.

Parameters

[in]	i2c	The I2C peripheral to use.
[in]	addr	The I2C address of the sensor.

Returns

Returns zero on OK, non-zero otherwise.

Definition at line 197 of file si7013.c.