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adt7420.c File Reference
Functions

adt7420.c File Reference

Implementation of ADT7420 Driver. More...

Go to the source code of this file.

Functions

uint8_t adt7420_get_register_value (struct adt7420_dev *dev, uint8_t register_address)
 Reads the value of a register.
void adt7420_set_register_value (struct adt7420_dev *dev, uint8_t register_address, uint8_t register_value)
 Sets the value of a register.
int32_t adt7420_init (struct adt7420_dev **device, struct adt7420_init_param init_param)
 Initializes the communication peripheral and checks if the device is present.
int32_t adt7420_remove (struct adt7420_dev *dev)
 Free the resources allocated by adt7420_init().
void adt7420_reset (struct adt7420_dev *dev)
 Resets the ADT7420.
void adt7420_set_operation_mode (struct adt7420_dev *dev, uint8_t mode)
 Sets the operational mode for ADT7420.
void adt7420_set_resolution (struct adt7420_dev *dev, uint8_t resolution)
 Sets the resolution for ADT7420.
float adt7420_get_temperature (struct adt7420_dev *dev)
 Reads the temperature data and converts it to Celsius degrees.

Detailed Description

Implementation of ADT7420 Driver.

Author:
DBogdan (dragos.bogdan@analog.com)

Copyright 2012(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  • Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  • Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
  • Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
  • The use of this software may or may not infringe the patent rights of one or more patent holders. This license does not release you from the requirement that you obtain separate licenses from these patent holders to use this software.
  • Use of the software either in source or binary form, must be run on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition in file adt7420.c.

Function Documentation

uint8_t adt7420_get_register_value ( struct adt7420_dev *  dev,
uint8_t  register_address 
)

Reads the value of a register.

Parameters:
dev- The device structure.
register_address- Address of the register.
Returns:
register_value - Value of the register.

Definition at line 54 of file adt7420.c.

float adt7420_get_temperature ( struct adt7420_dev *  dev )

Reads the temperature data and converts it to Celsius degrees.

Parameters:
dev- The device structure.
Returns:
temperature - Temperature in degrees Celsius.

Negative temperature

Positive temperature

Negative temperature

Positive temperature

Definition at line 224 of file adt7420.c.

int32_t adt7420_init ( struct adt7420_dev **  device,
struct adt7420_init_param  init_param 
)

Initializes the communication peripheral and checks if the device is present.

Parameters:
device- The device structure.
init_param- The structure that contains the device initial parameters.
Returns:
status - The result of the initialization procedure. Example: -1 - I2C peripheral was not initialized or the device is not present. 0 - I2C peripheral was initialized and the device is present.

Definition at line 108 of file adt7420.c.

int32_t adt7420_remove ( struct adt7420_dev *  dev )

Free the resources allocated by adt7420_init().

Parameters:
dev- The device structure.
Returns:
ret - The result of the remove procedure.

Definition at line 141 of file adt7420.c.

void adt7420_reset ( struct adt7420_dev *  dev )

Resets the ADT7420.

The ADT7420 does not respond to I2C bus commands while the default values upload (approximately 200 us).

Parameters:
dev- The device structure.
Returns:
None.

Definition at line 161 of file adt7420.c.

void adt7420_set_operation_mode ( struct adt7420_dev *  dev,
uint8_t  mode 
)

Sets the operational mode for ADT7420.

Parameters:
dev- The device structure.
mode- Operation mode. Example: ADT7420_OP_MODE_CONT_CONV - continuous conversion; ADT7420_OP_MODE_ONE_SHOT - one shot; ADT7420_OP_MODE_1_SPS - 1 SPS mode; ADT7420_OP_MODE_SHUTDOWN - shutdown.
Returns:
None.

Definition at line 184 of file adt7420.c.

void adt7420_set_register_value ( struct adt7420_dev *  dev,
uint8_t  register_address,
uint8_t  register_value 
)

Sets the value of a register.

Parameters:
dev- The device structure.
register_address- Address of the register.
register_value- Value of the register.
Returns:
None.

Definition at line 80 of file adt7420.c.

void adt7420_set_resolution ( struct adt7420_dev *  dev,
uint8_t  resolution 
)

Sets the resolution for ADT7420.

Parameters:
dev- The device structure.
resolution- Resolution. Example: 0 - 13-bit resolution; 1 - 16-bit resolution.
Returns:
None.

Definition at line 205 of file adt7420.c.

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