Si70XX Sensor#

sl_si70xx_commands#

sl_si70xx_commands

Enum for Si70xx commands.

This enumeration defines the command codes used to interact with the Si70xx sensor family. These commands are used to measure humidity and temperature, read and write user registers, control the heater, and read the electronic ID and firmware revision.

sl_si70xx_measurement_type#

sl_si70xx_measurement_type

Enum for Temperature and Humidity measurement types.

This enumeration defines the types of measurements that can be performed by the Si70xx sensor. It includes options for measuring humidity and temperature, as well as a validation enum.

sl_si70xx_eid_type#

sl_si70xx_eid_type

To specify the type of electronic ID byte to be sent.

This enumeration defines the types of electronic ID bytes that can be sent to the Si70xx sensor. It includes options for sending the first and second bytes of the electronic ID, as well as a validation enum.

sl_si70xx_registers#

sl_si70xx_registers

To specify the RH/T (Relative Humidity & Temperature) User Register and Heater Control Registers.

This enumeration defines the register types used for configuring the Si70xx sensor. It includes options for the RH/T user register and the heater control register, as well as a validation enum.

sl_si70xx_commands_t#

typedef enum sl_si70xx_commands sl_si70xx_commands_t

Enum for Si70xx commands.

This enumeration defines the command codes used to interact with the Si70xx sensor family. These commands are used to measure humidity and temperature, read and write user registers, control the heater, and read the electronic ID and firmware revision.

sl_si70xx_measurement_type_t#

typedef enum sl_si70xx_measurement_type sl_si70xx_measurement_type_t

Enum for Temperature and Humidity measurement types.

This enumeration defines the types of measurements that can be performed by the Si70xx sensor. It includes options for measuring humidity and temperature, as well as a validation enum.

sl_si70xx_eid_type_t#

typedef enum sl_si70xx_eid_type sl_si70xx_eid_type_t

To specify the type of electronic ID byte to be sent.

This enumeration defines the types of electronic ID bytes that can be sent to the Si70xx sensor. It includes options for sending the first and second bytes of the electronic ID, as well as a validation enum.

sl_si70xx_registers_t#

typedef enum sl_si70xx_registers sl_si70xx_registers_t

To specify the RH/T (Relative Humidity & Temperature) User Register and Heater Control Registers.

This enumeration defines the register types used for configuring the Si70xx sensor. It includes options for the RH/T user register and the heater control register, as well as a validation enum.

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)

To initialize the Si70xx sensor.

This API initializes the Si70xx sensor and must be called before using other functions.

• Pre-conditions:

  • sl_si91x_si70xx_reset()

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

  • SL_STATUS_INITIALIZATION (0x0010) - No Si70xx device present.

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To check whether an Si7006/13/20/21 is present on the I2C bus.

This API checks whether an Si7006/13/20/21 sensor is present on the I2C bus based on the provided Electronic ID (EID). If SL_EID_FIRST_BYTE is selected, the first byte of the EID is considered. If SL_EID_SECOND_BYTE is selected, the second byte of the EID is considered. For details on EID commands, see the sensor's datasheet. The device ID from SNB_3 is written if the device responds. Pass NULL to discard. Expected values: 0x0D for Si7013, 0x14 for Si7020, or 0x15 for Si7021.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

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

This API is used to measure relative humidity in percentage and temperature in degrees Celsius from the Si70xx sensor. The relative humidity and temperature values are obtained after conversion as per the formula mentioned in the datasheet.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To read the firmware revision from the Si7006/13/20/21 sensor.

This API reads the firmware revision from the Si70xx sensor. The firmware revision provides information about the internal firmware version of the sensor.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To read the temperature value from the previous relative humidity measurement from the Si7006/13/20/21 sensor.

This API reads the temperature (in degrees Celsius) from the previous relative humidity measurement (in percent) from the Si70xx sensor.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To start a no-hold measurement of relative humidity or temperature from the Si7006/13/20/21 sensor.

This API starts a no-hold measurement (not acknowledging read requests) of relative humidity or temperature from the Si70xx sensor. The measurement type is specified by the type parameter, which can be either relative humidity or temperature.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To measure relative humidity from the Si7006/13/20/21 sensor.

This API is used to measure the relative humidity from the Si70xx sensor. The relative humidity value is returned in the humid_data parameter.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To measure temperature from the Si7006/13/20/21 sensor.

This API is used to measure the temperature from the Si70xx sensor. The temperature value is returned in the temp_data parameter.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

sl_si91x_si70xx_reset#

sl_status_t sl_si91x_si70xx_reset (sl_i2c_instance_t i2c_instance, uint8_t addr)

To initiate a software reset for the Si70xx sensor.

This API initiates a software reset for the Si70xx sensor using the appropriate command. It is used to reset the sensor to its default state.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To read the RH/T user register and heater control register data from the Si70xx sensor.

This API reads the RH/T user register and heater control register data from the Si70xx sensor. The register to be read is specified by the reg parameter, which can be either the RH/T user register or the heater control register.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.

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

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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)

To write data to RH/T user register and heater control register.

This API is used to write data to the RH/T user register and heater control register of the Si70xx sensor. The register to be written is specified by the reg parameter, which can be either the RH/T user register or the heater control register.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK (0x0000) - Success.
    

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

For more information on status codes, see SL STATUS DOCUMENTATION.

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.