HTS221

Collaboration diagram for HTS221:

Detailed Description

Macros
#define	hts221HygrometerGetAxesNumber(devp)   hygrometerGetAxesNumber(&((devp)->hygro_if))
	Return the number of axes of the BaseHygrometer. More...
#define	hts221HygrometerReadRaw(devp, axes)   hygrometerReadRaw(&((devp)->hygro_if), axes)
	Retrieves raw data from the BaseHygrometer. More...
#define	hts221HygrometerReadCooked(devp, axes)   hygrometerReadCooked(&((devp)->hygro_if), axes)
	Retrieves cooked data from the BaseHygrometer. More...
#define	hts221HygrometerSetBias(devp, bp)   hygrometerSetBias(&((devp)->hygro_if), bp)
	Set bias values for the BaseHygrometer. More...
#define	hts221HygrometerResetBias(devp)   hygrometerResetBias(&((devp)->hygro_if))
	Reset bias values for the BaseHygrometer. More...
#define	hts221HygrometerSetSensitivity(devp, sp)   hygrometerSetSensitivity(&((devp)->hygro_if), sp)
	Set sensitivity values for the BaseHygrometer. More...
#define	hts221HygrometerResetSensitivity(devp)   hygrometerResetSensitivity(&((devp)->hygro_if))
	Reset sensitivity values for the BaseHygrometer. More...
#define	hts221ThermometerGetAxesNumber(devp)   thermometerGetAxesNumber(&((devp)->thermo_if))
	Return the number of axes of the BaseThermometer. More...
#define	hts221ThermometerReadRaw(devp, axes)   thermometerReadRaw(&((devp)->thermo_if), axes)
	Retrieves raw data from the BaseThermometer. More...
#define	hts221ThermometerReadCooked(devp, axes)   thermometerReadCooked(&((devp)->thermo_if), axes)
	Retrieves cooked data from the BaseThermometer. More...
#define	hts221ThermometerSetBias(devp, bp)   thermometerSetBias(&((devp)->thermo_if), bp)
	Set bias values for the BaseThermometer. More...
#define	hts221ThermometerResetBias(devp)   thermometerResetBias(&((devp)->thermo_if))
	Reset bias values for the BaseThermometer. More...
#define	hts221ThermometerSetSensitivity(devp, sp)   thermometerSetSensitivity(&((devp)->thermo_if), sp)
	Set sensitivity values for the BaseThermometer. More...
#define	hts221ThermometerResetSensitivity(devp)   thermometerResetSensitivity(&((devp)->thermo_if))
	Reset sensitivity values for the BaseThermometer. More...

Version identification
#define	EX_HTS221_VERSION   "1.1.2"
	HTS221 driver version string. More...
#define	EX_HTS221_MAJOR   1
	HTS221 driver version major number. More...
#define	EX_HTS221_MINOR   1
	HTS221 driver version minor number. More...
#define	EX_HTS221_PATCH   2
	HTS221 driver version patch number. More...
#define	HTS221_HYGRO_NUMBER_OF_AXES   1U
	HTS221 hygrometer subsystem characteristics. More...
#define	HTS221_THERMO_NUMBER_OF_AXES   1U
	HTS221 thermometer subsystem characteristics. More...

HTS221 communication interfaces related bit masks
#define	HTS221_DI_MASK   0xFF
#define	HTS221_DI(n)   (1 << n)
#define	HTS221_AD_MASK   0x3F
#define	HTS221_AD(n)   (1 << n)
#define	HTS221_MS   (1 << 6)
#define	HTS221_RW   (1 << 7)
#define	HTS221_SUB_MS   (1 << 7)
#define	HTS221_SAD   0x5F

HTS221 register addresses
#define	HTS221_AD_WHO_AM_I   0x0F
#define	HTS221_AD_AV_CONF   0x10
#define	HTS221_AD_CTRL_REG1   0x20
#define	HTS221_AD_CTRL_REG2   0x21
#define	HTS221_AD_CTRL_REG3   0x22
#define	HTS221_AD_STATUS_REG   0x27
#define	HTS221_AD_HUMIDITY_OUT_L   0x28
#define	HTS221_AD_HUMIDITY_OUT_H   0x29
#define	HTS221_AD_TEMP_OUT_L   0x2A
#define	HTS221_AD_TEMP_OUT_H   0x2B
#define	HTS221_AD_CALIB_0   0x30
#define	HTS221_AD_CALIB_1   0x31
#define	HTS221_AD_CALIB_2   0x32
#define	HTS221_AD_CALIB_3   0x33
#define	HTS221_AD_CALIB_4   0x34
#define	HTS221_AD_CALIB_5   0x35
#define	HTS221_AD_CALIB_6   0x36
#define	HTS221_AD_CALIB_7   0x37
#define	HTS221_AD_CALIB_8   0x38
#define	HTS221_AD_CALIB_9   0x39
#define	HTS221_AD_CALIB_A   0x3A
#define	HTS221_AD_CALIB_B   0x3B
#define	HTS221_AD_CALIB_C   0x3C
#define	HTS221_AD_CALIB_D   0x3D
#define	HTS221_AD_CALIB_E   0x3E
#define	HTS221_AD_CALIB_F   0x3F

HTS221_CTRL_REG1 register bits definitions
#define	HTS221_CTRL_REG1_MASK   0x87
#define	HTS221_CTRL_REG1_ODR0   (1 << 0)
#define	HTS221_CTRL_REG1_ODR1   (1 << 1)
#define	HTS221_CTRL_REG1_BDU   (1 << 2)
#define	HTS221_CTRL_REG1_PD   (1 << 7)

HTS221_CTRL_REG2 register bits definitions
#define	HTS221_CTRL_REG2_MASK   0x83
#define	HTS221_CTRL_REG2_ONE_SHOT   (1 << 0)
#define	HTS221_CTRL_REG2_HEATER   (1 << 1)
#define	HTS221_CTRL_REG2_BOOT   (1 << 7)

HTS221_CTRL_REG3 register bits definitions
#define	HTS221_CTRL_REG3_MASK   0xC4
#define	HTS221_CTRL_REG3_DRDY   (1 << 2)
#define	HTS221_CTRL_REG3_PP_OD   (1 << 6)
#define	HTS221_CTRL_REG3_INT_H_L   (1 << 7)

Configuration options
#define	HTS221_USE_SPI   FALSE
	HTS221 SPI interface switch. More...
#define	HTS221_SHARED_SPI   FALSE
	HTS221 shared SPI switch. More...
#define	HTS221_USE_I2C   TRUE
	HTS221 I2C interface switch. More...
#define	HTS221_SHARED_I2C   FALSE
	HTS221 shared I2C switch. More...
#define	HTS221_USE_ADVANCED   FALSE
	HTS221 advanced configurations switch. More...

HTS221 data structures and types.
Todo: Add support for HTS221 over SPI.
typedef struct HTS221Driver	HTS221Driver
	Structure representing a HTS221 driver. More...
#define	_hts221_methods_alone
	HTS221 specific methods. More...
#define	_hts221_methods
	HTS221 specific methods with inherited ones. More...
#define	_hts221_data
	HTS221Driver specific data. More...

Data Structures
struct	HTS221Config
	HTS221 configuration structure. More...
struct	HTS221VMT
	HTS221 virtual methods table. More...
struct	HTS221Driver
	HTS221 2-axis hygrometer/thermometer class. More...

Functions
static msg_t	hts221I2CReadRegister (I2CDriver *i2cp, uint8_t reg, uint8_t *rxbuf, size_t n)
	Reads registers value using I2C. More...
static msg_t	hts221I2CWriteRegister (I2CDriver *i2cp, uint8_t *txbuf, size_t n)
	Writes a value into a register using I2C. More...
static msg_t	hts221Calibrate (HTS221Driver *devp)
	Computes biases and sensitivities starting from data stored in calibration registers. More...
static size_t	hygro_get_axes_number (void *ip)
	Return the number of axes of the BaseHygrometer. More...
static msg_t	hygro_read_raw (void *ip, int32_t axes[])
	Retrieves raw data from the BaseHygrometer. More...
static msg_t	hygro_read_cooked (void *ip, float axes[])
	Retrieves cooked data from the BaseHygrometer. More...
static msg_t	hygro_set_bias (void *ip, float *bp)
	Set bias values for the BaseHygrometer. More...
static msg_t	hygro_reset_bias (void *ip)
	Reset bias values for the BaseHygrometer. More...
static msg_t	hygro_set_sensitivity (void *ip, float *sp)
	Set sensitivity values for the BaseHygrometer. More...
static msg_t	hygro_reset_sensitivity (void *ip)
	Reset sensitivity values for the BaseHygrometer. More...
static size_t	thermo_get_axes_number (void *ip)
	Return the number of axes of the BaseThermometer. More...
static msg_t	thermo_read_raw (void *ip, int32_t axes[])
	Retrieves raw data from the BaseThermometer. More...
static msg_t	thermo_read_cooked (void *ip, float *axis)
	Retrieves cooked data from the BaseThermometer. More...
static msg_t	thermo_set_bias (void *ip, float *bp)
	Set bias values for the BaseThermometer. More...
static msg_t	thermo_reset_bias (void *ip)
	Reset bias values for the BaseThermometer. More...
static msg_t	thermo_set_sensitivity (void *ip, float *sp)
	Set sensitivity values for the BaseThermometer. More...
static msg_t	thermo_reset_sensitivity (void *ip)
	Reset sensitivity values for the BaseThermometer. More...
void	hts221ObjectInit (HTS221Driver *devp)
	Initializes an instance. More...
void	hts221Start (HTS221Driver *devp, const HTS221Config *config)
	Configures and activates HTS221 Complex Driver peripheral. More...
void	hts221Stop (HTS221Driver *devp)
	Deactivates the HTS221 Complex Driver peripheral. More...

Macro Definition Documentation

#define EX_HTS221_VERSION   "1.1.2"

HTS221 driver version string.

Definition at line 47 of file hts221.h.

#define EX_HTS221_MAJOR   1

HTS221 driver version major number.

Definition at line 52 of file hts221.h.

#define EX_HTS221_MINOR   1

HTS221 driver version minor number.

Definition at line 57 of file hts221.h.

#define EX_HTS221_PATCH   2

HTS221 driver version patch number.

Definition at line 62 of file hts221.h.

#define HTS221_HYGRO_NUMBER_OF_AXES   1U

HTS221 hygrometer subsystem characteristics.

Note

Sensitivity is expressed as rH/LSB whereas rH stand for percentage of relative humidity.

Bias is expressed as rH.

Definition at line 72 of file hts221.h.

Referenced by hts221ObjectInit(), and hygro_get_axes_number().

#define HTS221_THERMO_NUMBER_OF_AXES   1U

HTS221 thermometer subsystem characteristics.

Note

Sensitivity is expressed as °C/LSB.

Bias is expressed as °C.

Definition at line 85 of file hts221.h.

Referenced by hts221ObjectInit(), and thermo_get_axes_number().

#define HTS221_USE_SPI   FALSE

HTS221 SPI interface switch.

If set to TRUE the support for SPI is included.

Note

The default is FALSE.

Definition at line 184 of file hts221.h.

#define HTS221_SHARED_SPI   FALSE

HTS221 shared SPI switch.

If set to TRUE the device acquires SPI bus ownership on each transaction.

Note

The default is FALSE. Requires SPI_USE_MUTUAL_EXCLUSION

Definition at line 194 of file hts221.h.

#define HTS221_USE_I2C   TRUE

HTS221 I2C interface switch.

If set to TRUE the support for I2C is included.

Note

The default is TRUE.

Definition at line 203 of file hts221.h.

#define HTS221_SHARED_I2C   FALSE

HTS221 shared I2C switch.

If set to TRUE the device acquires I2C bus ownership on each transaction.

Note

The default is FALSE. Requires I2C_USE_MUTUAL_EXCLUSION

Definition at line 213 of file hts221.h.

#define HTS221_USE_ADVANCED   FALSE

HTS221 advanced configurations switch.

If set to TRUE more configurations are available.

Note

The default is FALSE.

Definition at line 222 of file hts221.h.

#define _hts221_methods_alone

HTS221 specific methods.

Note

No methods so far, just a common ancestor interface.

Definition at line 390 of file hts221.h.

#define _hts221_methods

Value:

_base_object_methods                                                      \
  _hts221_methods_alone

HTS221 specific methods with inherited ones.

Definition at line 395 of file hts221.h.

#define _hts221_data

Value:

/* Driver state.*/                                                        \
  hts221_state_t            state;                                          \
  /* Current configuration data.*/                                          \
  const HTS221Config        *config;                                        \
  /* Hygrometer subsystem axes number.*/                                    \
  size_t                    hygroaxes;                                      \
  /* Hygrometer subsystem current sensitivity.*/                            \
  float                     hygrosensitivity;                               \
  /* Hygrometer subsystem current bias .*/                                  \
  float                     hygrobias;                                      \
  /* Hygrometer subsystem factory sensitivity.*/                            \
  float                     hygrofactorysensitivity;                        \
  /* Hygrometer subsystem factory bias .*/                                  \
  float                     hygrofactorybias;                               \
  /* Thermometer subsystem axes number.*/                                   \
  size_t                    thermoaxes;                                     \
  /* Thermometer subsystem current sensitivity.*/                           \
  float                     thermosensitivity;                              \
  /* Thermometer subsystem current bias.*/                                  \
  float                     thermobias;                                     \
  /* Thermometer subsystem factory sensitivity.*/                           \
  float                     thermofactorysensitivity;                       \
  /* Thermometer subsystem factory bias.*/                                  \
  float                     thermofactorybias;

HTS221Driver specific data.

Definition at line 411 of file hts221.h.

#define hts221HygrometerGetAxesNumber

(

devp

)

hygrometerGetAxesNumber(&((devp)->hygro_if))

Return the number of axes of the BaseHygrometer.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

the number of axes.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 464 of file hts221.h.

#define hts221HygrometerReadRaw	(		devp,
			axes
	)		hygrometerReadRaw(&((devp)->hygro_if), axes)

Retrieves raw data from the BaseHygrometer.

Note

This data is retrieved from MEMS register without any algebraical manipulation.

The axes array must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[out]	axes	a buffer which would be filled with raw data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 485 of file hts221.h.

#define hts221HygrometerReadCooked	(		devp,
			axes
	)		hygrometerReadCooked(&((devp)->hygro_if), axes)

Retrieves cooked data from the BaseHygrometer.

Note

This data is manipulated according to the formula cooked = (raw * sensitivity) - bias.

Final data is expressed as rH.

The axes array must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[out]	axes	a buffer which would be filled with cooked data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 507 of file hts221.h.

#define hts221HygrometerSetBias	(		devp,
			bp
	)		hygrometerSetBias(&((devp)->hygro_if), bp)

Set bias values for the BaseHygrometer.

Note

Bias must be expressed as rH.

The bias buffer must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[in]	bp	a buffer which contains biases.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 524 of file hts221.h.

#define hts221HygrometerResetBias

(

devp

)

hygrometerResetBias(&((devp)->hygro_if))

Reset bias values for the BaseHygrometer.

Note

Default biases value are obtained from device datasheet when available otherwise they are considered zero.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 539 of file hts221.h.

#define hts221HygrometerSetSensitivity	(		devp,
			sp
	)		hygrometerSetSensitivity(&((devp)->hygro_if), sp)

Set sensitivity values for the BaseHygrometer.

Note

Sensitivity must be expressed as rH/LSB.

The sensitivity buffer must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[in]	sp	a buffer which contains sensitivities.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 556 of file hts221.h.

#define hts221HygrometerResetSensitivity

(

devp

)

hygrometerResetSensitivity(&((devp)->hygro_if))

Reset sensitivity values for the BaseHygrometer.

Note

Default sensitivities value are obtained from device datasheet.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 570 of file hts221.h.

#define hts221ThermometerGetAxesNumber

(

devp

)

thermometerGetAxesNumber(&((devp)->thermo_if))

Return the number of axes of the BaseThermometer.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

the number of axes.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 582 of file hts221.h.

#define hts221ThermometerReadRaw	(		devp,
			axes
	)		thermometerReadRaw(&((devp)->thermo_if), axes)

Retrieves raw data from the BaseThermometer.

Note

This data is retrieved from MEMS register without any algebraical manipulation.

The axes array must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[out]	axes	a buffer which would be filled with raw data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 603 of file hts221.h.

#define hts221ThermometerReadCooked	(		devp,
			axes
	)		thermometerReadCooked(&((devp)->thermo_if), axes)

Retrieves cooked data from the BaseThermometer.

Note

This data is manipulated according to the formula cooked = (raw * sensitivity) - bias.

Final data is expressed as °C.

The axes array must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[out]	axes	a buffer which would be filled with cooked data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 625 of file hts221.h.

#define hts221ThermometerSetBias	(		devp,
			bp
	)		thermometerSetBias(&((devp)->thermo_if), bp)

Set bias values for the BaseThermometer.

Note

Bias must be expressed as °C.

The bias buffer must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[in]	bp	a buffer which contains biases.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 642 of file hts221.h.

#define hts221ThermometerResetBias

(

devp

)

thermometerResetBias(&((devp)->thermo_if))

Reset bias values for the BaseThermometer.

Note

Default biases value are obtained from device datasheet when available otherwise they are considered zero.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 657 of file hts221.h.

#define hts221ThermometerSetSensitivity	(		devp,
			sp
	)		thermometerSetSensitivity(&((devp)->thermo_if), sp)

Set sensitivity values for the BaseThermometer.

Note

Sensitivity must be expressed as °C/LSB.

The sensitivity buffer must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	devp	pointer to HTS221Driver.
[in]	sp	a buffer which contains sensitivities.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 674 of file hts221.h.

#define hts221ThermometerResetSensitivity

(

devp

)

thermometerResetSensitivity(&((devp)->thermo_if))

Reset sensitivity values for the BaseThermometer.

Note

Default sensitivities value are obtained from device datasheet.

Parameters

[in]

devp

pointer to HTS221Driver.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 688 of file hts221.h.

Typedef Documentation

typedef struct HTS221Driver HTS221Driver

Structure representing a HTS221 driver.

Definition at line 268 of file hts221.h.

Enumeration Type Documentation

enum hts221_odr_t

HTS221 output data rate and bandwidth.

Enumerator
HTS221_ODR_ONE_SHOT	One shot.
HTS221_ODR_1HZ	Output data rate 1 Hz.
HTS221_ODR_7HZ	Output data rate 7 Hz.
HTS221_ODR_12P5HZ	Output data rate 12.5 Hz.

Definition at line 273 of file hts221.h.

enum hts221_avgh_t

HTS221 humidity resolution.

Enumerator
HTS221_AVGH_4	Number of internal average is 4.
HTS221_AVGH_8	Number of internal average is 8.
HTS221_AVGH_16	Number of internal average is 16.
HTS221_AVGH_32	Number of internal average is 32.
HTS221_AVGH_64	Number of internal average is 64.
HTS221_AVGH_128	Number of internal average is 128.
HTS221_AVGH_256	Number of internal average is 256.
HTS221_AVGH_512	Number of internal average is 512.

Definition at line 283 of file hts221.h.

enum hts221_avgt_t

HTS221 temperature resolution.

Enumerator
HTS221_AVGT_2	Number of internal average is 2.
HTS221_AVGT_4	Number of internal average is 4.
HTS221_AVGT_8	Number of internal average is 8.
HTS221_AVGT_16	Number of internal average is 16.
HTS221_AVGT_32	Number of internal average is 32.
HTS221_AVGT_64	Number of internal average is 64.
HTS221_AVGT_128	Number of internal average is 128.
HTS221_AVGT_256	Number of internal average is 256.

Definition at line 297 of file hts221.h.

enum hts221_bdu_t

HTS221 block data update.

Enumerator
HTS221_BDU_CONTINUOUS	Block data continuously updated.
HTS221_BDU_BLOCKED	Block data updated after reading.

Definition at line 311 of file hts221.h.

enum hts221_state_t

Driver state machine possible states.

Enumerator
HTS221_UNINIT	Not initialized.
HTS221_STOP	Stopped.
HTS221_READY	Ready.

Definition at line 319 of file hts221.h.

Function Documentation

static msg_t hts221I2CReadRegister ( I2CDriver *  i2cp, uint8_t  reg, uint8_t *  rxbuf, size_t  n  )

static

Reads registers value using I2C.

Precondition

The I2C interface must be initialized and the driver started.

Parameters

[in]	i2cp	pointer to the I2C interface
[in]	reg	first sub-register address
[out]	rxbuf	pointer to an output buffer
[in]	n	number of consecutive register to read

Returns

the operation status.

Function Class:Not an API, this function is for internal use only.

Definition at line 69 of file hts221.c.

References i2cMasterTransmitTimeout(), and TIME_INFINITE.

Referenced by hts221Calibrate(), hygro_read_raw(), and thermo_read_raw().

Here is the call graph for this function:

static msg_t hts221I2CWriteRegister ( I2CDriver *  i2cp, uint8_t *  txbuf, size_t  n  )

static

Writes a value into a register using I2C.

Precondition

The I2C interface must be initialized and the driver started.

Parameters

[in]	i2cp	pointer to the I2C interface
[in]	txbuf	buffer containing sub-address value in first position and values to write
[in]	n	size of txbuf less one (not considering the first element)

Returns

the operation status.

Function Class:Not an API, this function is for internal use only.

Definition at line 92 of file hts221.c.

References i2cMasterTransmitTimeout(), and TIME_INFINITE.

Referenced by hts221Start(), and hts221Stop().

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static msg_t hts221Calibrate ( HTS221Driver *  devp )

static

Computes biases and sensitivities starting from data stored in calibration registers.

Note

Factory bias and sensitivity values are stored into the driver structure.

Parameters

[in]

devp

pointer to the HTS221 interface

Returns

the operation status.

Function Class:Not an API, this function is for internal use only.

Definition at line 112 of file hts221.c.

References hts221I2CReadRegister().

Referenced by hts221Start().

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static size_t hygro_get_axes_number ( void *  ip )

static

Return the number of axes of the BaseHygrometer.

Parameters

[in]

ip

pointer to BaseHygrometer interface.

Returns

the number of axes.

Definition at line 173 of file hts221.c.

References HTS221_HYGRO_NUMBER_OF_AXES.

Referenced by thermo_reset_sensitivity().

static msg_t hygro_read_raw ( void *  ip, int32_t  axes[]  )

static

Retrieves raw data from the BaseHygrometer.

Note

This data is retrieved from MEMS register without any algebraical manipulation.

The axes array must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	ip	pointer to BaseHygrometer interface.
[out]	axes	a buffer which would be filled with raw data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Definition at line 195 of file hts221.c.

References HTS221_READY, hts221I2CReadRegister(), I2C_READY, i2cAcquireBus(), i2cReleaseBus(), i2cStart(), MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by hygro_read_cooked(), and thermo_reset_sensitivity().

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static msg_t hygro_read_cooked ( void *  ip, float  axes[]  )

static

Retrieves cooked data from the BaseHygrometer.

Note

This data is manipulated according to the formula cooked = (raw * sensitivity) - bias.

Final data is expressed as rH.

The axes array must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	ip	pointer to BaseHygrometer interface.
[out]	axes	a buffer which would be filled with cooked data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Definition at line 249 of file hts221.c.

References HTS221_READY, hygro_read_raw(), objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

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static msg_t hygro_set_bias ( void *  ip, float *  bp  )

static

Set bias values for the BaseHygrometer.

Note

Bias must be expressed as rH.

The bias buffer must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	ip	pointer to BaseHygrometer interface.
[in]	bp	a buffer which contains biases.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Definition at line 284 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t hygro_reset_bias ( void *  ip )

static

Reset bias values for the BaseHygrometer.

Note

Default biases value are obtained from device datasheet when available otherwise they are considered zero.

Parameters

[in]

ip

pointer to BaseHygrometer interface.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 310 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t hygro_set_sensitivity ( void *  ip, float *  sp  )

static

Set sensitivity values for the BaseHygrometer.

Note

Sensitivity must be expressed as rH/LSB.

The sensitivity buffer must be at least the same size of the BaseHygrometer axes number.

Parameters

[in]	ip	pointer to BaseHygrometer interface.
[in]	sp	a buffer which contains sensitivities.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 338 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t hygro_reset_sensitivity ( void *  ip )

static

Reset sensitivity values for the BaseHygrometer.

Note

Default sensitivities value are obtained from device datasheet.

Parameters

[in]

ip

pointer to BaseHygrometer interface.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 363 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static size_t thermo_get_axes_number ( void *  ip )

static

Return the number of axes of the BaseThermometer.

Parameters

[in]

ip

pointer to BaseThermometer interface.

Returns

the number of axes.

Definition at line 386 of file hts221.c.

References HTS221_THERMO_NUMBER_OF_AXES.

Referenced by thermo_reset_sensitivity().

static msg_t thermo_read_raw ( void *  ip, int32_t  axes[]  )

static

Retrieves raw data from the BaseThermometer.

Note

This data is retrieved from MEMS register without any algebraical manipulation.

The axes array must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	ip	pointer to BaseThermometer interface.
[out]	axes	a buffer which would be filled with raw data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Definition at line 408 of file hts221.c.

References HTS221_READY, hts221I2CReadRegister(), I2C_READY, i2cAcquireBus(), i2cReleaseBus(), i2cStart(), MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_read_cooked(), and thermo_reset_sensitivity().

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static msg_t thermo_read_cooked ( void *  ip, float *  axis  )

static

Retrieves cooked data from the BaseThermometer.

Note

This data is manipulated according to the formula cooked = (raw * sensitivity) - bias.

Final data is expressed as °C.

The axes array must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	ip	pointer to BaseThermometer interface.
[out]	axis	a buffer which would be filled with cooked data.

Returns

The operation status.

Return values

MSG_OK	if the function succeeded.
MSG_RESET	if one or more I2C errors occurred, the errors can be retrieved using i2cGetErrors().
MSG_TIMEOUT	if a timeout occurred before operation end.

Definition at line 462 of file hts221.c.

References HTS221_READY, objGetInstance, osalDbgAssert, osalDbgCheck, and thermo_read_raw().

Referenced by thermo_reset_sensitivity().

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static msg_t thermo_set_bias ( void *  ip, float *  bp  )

static

Set bias values for the BaseThermometer.

Note

Bias must be expressed as °C.

The bias buffer must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	ip	pointer to BaseThermometer interface.
[in]	bp	a buffer which contains biases.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 494 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t thermo_reset_bias ( void *  ip )

static

Reset bias values for the BaseThermometer.

Note

Default biases value are obtained from device datasheet when available otherwise they are considered zero.

Parameters

[in]

ip

pointer to BaseThermometer interface.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 521 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t thermo_set_sensitivity ( void *  ip, float *  sp  )

static

Set sensitivity values for the BaseThermometer.

Note

Sensitivity must be expressed as °C/LSB.

The sensitivity buffer must be at least the same size of the BaseThermometer axes number.

Parameters

[in]	ip	pointer to BaseThermometer interface.
[in]	sp	a buffer which contains sensitivities.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 550 of file hts221.c.

References HTS221_READY, MSG_OK, objGetInstance, osalDbgAssert, and osalDbgCheck.

Referenced by thermo_reset_sensitivity().

static msg_t thermo_reset_sensitivity ( void *  ip )

static

Reset sensitivity values for the BaseThermometer.

Note

Default sensitivities value are obtained from device datasheet.

Parameters

[in]

ip

pointer to BaseThermometer interface.

Returns

The operation status.

Return values

MSG_OK

if the function succeeded.

Definition at line 576 of file hts221.c.

References HTS221_READY, hygro_get_axes_number(), hygro_read_cooked(), hygro_read_raw(), hygro_reset_bias(), hygro_reset_sensitivity(), hygro_set_bias(), hygro_set_sensitivity(), MSG_OK, objGetInstance, osalDbgAssert, osalDbgCheck, thermo_get_axes_number(), thermo_read_cooked(), thermo_read_raw(), thermo_reset_bias(), thermo_set_bias(), and thermo_set_sensitivity().

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void hts221ObjectInit

(

HTS221Driver *

devp

)

Initializes an instance.

Parameters

[out]

devp

pointer to the HTS221Driver object

Function Class:Initializer, this function just initializes an object and can be invoked before the kernel is initialized.

Definition at line 622 of file hts221.c.

References HTS221_HYGRO_NUMBER_OF_AXES, HTS221_STOP, HTS221_THERMO_NUMBER_OF_AXES, HTS221Driver::hygro_if, HTS221Driver::thermo_if, BaseThermometer::vmt, BaseHygrometer::vmt, and HTS221Driver::vmt.

void hts221Start	(	HTS221Driver *	devp,
		const HTS221Config *	config
	)

Configures and activates HTS221 Complex Driver peripheral.

Parameters

[in]	devp	pointer to the HTS221Driver object
[in]	config	pointer to the HTS221Config object

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 647 of file hts221.c.

References HTS221_READY, HTS221_STOP, hts221Calibrate(), hts221I2CWriteRegister(), i2cAcquireBus(), i2cReleaseBus(), i2cStart(), osalDbgAssert, osalDbgCheck, and osalThreadSleepMilliseconds.

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void hts221Stop

(

HTS221Driver *

devp

)

Deactivates the HTS221 Complex Driver peripheral.

Parameters

[in]

devp

pointer to the HTS221Driver object

Function Class:Normal API, this function can be invoked by regular system threads but not from within a lock zone.

Definition at line 755 of file hts221.c.

References HTS221_READY, HTS221_STOP, hts221I2CWriteRegister(), i2cAcquireBus(), i2cReleaseBus(), i2cStart(), i2cStop(), osalDbgAssert, and osalDbgCheck.

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