Si70XX Sensor#

sl_si70xx_commands#

sl_si70xx_commands

Enum for Si70xx commands.

sl_si70xx_measurement_type#

sl_si70xx_measurement_type

Enum for Temperature, Humidity measurement.

sl_si70xx_eid_type#

sl_si70xx_eid_type

Enum for electronic ID.

sl_si70xx_registers#

sl_si70xx_registers

Enum for User, Heater control registers.

sl_si70xx_commands_t#

typedef enum sl_si70xx_commands sl_si70xx_commands_t

Enum for Si70xx commands.

sl_si70xx_measurement_type_t#

typedef enum sl_si70xx_measurement_type sl_si70xx_measurement_type_t

Enum for Temperature, Humidity measurement.

sl_si70xx_eid_type_t#

typedef enum sl_si70xx_eid_type sl_si70xx_eid_type_t

Enum for electronic ID.

sl_si70xx_registers_t#

typedef enum sl_si70xx_registers sl_si70xx_registers_t

Enum for User, Heater control registers.

sl_si91x_si70xx_init#

sl_status_t sl_si91x_si70xx_init (sl_i2c_instance_t i2c_instance, uint8_t addr, sl_si70xx_eid_type_t eid)

Initialize the Si70xx sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INITIALIZATION (0x0010) - no Si70xx device present

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

sl_si91x_si70xx_is_present#

sl_status_t sl_si91x_si70xx_is_present (sl_i2c_instance_t i2c_instance, uint8_t addr, sl_si70xx_eid_type_t eid)

Check whether an Si7006/13/20/21 is present on the I2C bus (or) not.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

sl_si91x_si70xx_measure_rh_and_temp#

sl_status_t sl_si91x_si70xx_measure_rh_and_temp (sl_i2c_instance_t i2c_instance, uint8_t addr, uint32_t * humid_data, int32_t * temp_data)

Measure relative humidity and temperature from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_get_firmware_revision#

sl_status_t sl_si91x_si70xx_get_firmware_revision (sl_i2c_instance_t i2c_instance, uint8_t addr, uint8_t * firmware_revision)

Read Firmware Revision from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_read_temp_from_rh#

sl_status_t sl_si91x_si70xx_read_temp_from_rh (sl_i2c_instance_t i2c_instance, uint8_t addr, uint32_t * humid_data, int32_t * temp_data)

Reads temperature value from previous relative humidity measurement from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_start_no_hold_measure_rh_or_temp#

sl_status_t sl_si91x_si70xx_start_no_hold_measure_rh_or_temp (sl_i2c_instance_t i2c_instance, uint8_t addr, sl_si70xx_measurement_type_t type, uint32_t * data)

Start a no hold measurement of relative humidity (or) temperature from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

sl_si91x_si70xx_measure_humidity#

sl_status_t sl_si91x_si70xx_measure_humidity (sl_i2c_instance_t i2c_instance, uint8_t addr, uint32_t * humid_data)

Measure relative humidity from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_measure_temperature#

sl_status_t sl_si91x_si70xx_measure_temperature (sl_i2c_instance_t i2c_instance, uint8_t addr, int32_t * temp_data)

Measure temperature from Si7006/13/20/21 sensor.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_reset#

sl_status_t sl_si91x_si70xx_reset (sl_i2c_instance_t i2c_instance, uint8_t addr)

Initiates a si70xx software reset by the appropriate command.

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

sl_si91x_si70xx_read_control_register#

sl_status_t sl_si91x_si70xx_read_control_register (sl_i2c_instance_t i2c_instance, uint8_t addr, sl_si70xx_registers_t reg, uint8_t * data)

Reads the user register 1 and heater control register data.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

• SL_STATUS_NULL_POINTER (0x0022) - The parameter is null pointer

sl_si91x_si70xx_write_control_register#

sl_status_t sl_si91x_si70xx_write_control_register (sl_i2c_instance_t i2c_instance, uint8_t addr, sl_si70xx_registers_t reg, uint8_t value)

Writes data to user register 1 and heater control register.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• The following values are returned:

  • SL_STATUS_OK on success

• SL_STATUS_INVALID_PARAMETER (0x0021) - The parameter is invalid argument

SI7006_ADDR#

#define SI7006_ADDR

0X40

I2C device address for Si7006.

SI7013_ADDR#

#define SI7013_ADDR

0x41

I2C device address for Si7013.

SI7020_ADDR#

#define SI7020_ADDR

0X40

I2C device address for Si7020.

SI7021_ADDR#

#define SI7021_ADDR

0x40

I2C device address for Si7021.

I2C_BASE#

#define I2C_BASE

I2C2

I2C2 base.

RX_LEN#

#define RX_LEN

2

Read buffer length 2 bytes.

TX_LEN#

#define TX_LEN

2

Write buffer length 2 bytes.

RD_BUF#

#define RD_BUF

6

Read buffer length 6 bytes.

WR_BUF#

#define WR_BUF

1

Write buffer length 1 byte.