adt7420.c File Reference

Implementation of ADT7420 Driver. More...

#include <stdint.h>
#include <stdlib.h>
#include "no_os_error.h"
#include "no_os_alloc.h"
#include "no_os_delay.h"
#include "adt7420.h"

Include dependency graph for adt7420.c:

Functions
int	adt7420_reg_read (struct adt7420_dev *dev, uint16_t register_address, uint16_t *data)
	Reads the value of a register.
int	adt7420_reg_update_bits (struct adt7420_dev *dev, uint16_t register_address, uint8_t mask, uint8_t value)
	Sets the value of a register SPI/I2C.
int	adt7420_spi_reg_write (struct adt7420_dev *dev, uint16_t register_address, uint32_t data)
	Write a value of a register via SPI.
int	adt7420_i2c_reg_write (struct adt7420_dev *dev, uint16_t register_address, uint32_t data)
	Write a value of a register via I2C.
int	adt7420_reg_write (struct adt7420_dev *dev, uint16_t register_address, uint32_t data)
	Sets the value of a register SPI/I2C.
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().
int	adt7420_set_operation_mode (struct adt7420_dev *dev, uint8_t mode)
	Sets the operational mode for ADT7420/ADT7320.
int	adt7420_set_resolution (struct adt7420_dev *dev, uint8_t resolution)
	Sets the resolution for ADT7420/ADT7320.
int32_t	adt7420_reset (struct adt7420_dev *dev)
	Resets the SPI or I2C inteface for the ADT7420/ADT7320.
float	adt7420_get_temperature (struct adt7420_dev *dev)
	Reads the temperature data and converts it to Celsius degrees.
int	adt7420_spi_reg_read (struct adt7420_dev *dev, uint16_t register_address, uint16_t *data)
	Reads the value of a register SPI interface device.
int	adt7420_i2c_reg_read (struct adt7420_dev *dev, uint16_t register_address, uint16_t *data)
	Reads the value of a register I2C interface device.
bool	adt7420_is_spi (struct adt7420_dev *dev)
	Check if the interface of the selected device is SPI.

Variables
const struct adt7420_chip_info	chip_info []

Detailed Description

Implementation of ADT7420 Driver.

Author

DBogdan (drago.nosp@m.s.bo.nosp@m.gdan@.nosp@m.anal.nosp@m.og.co.nosp@m.m)

Copyright 2012, 2019, 2021(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Function Documentation

adt7420_get_temperature()

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

adt7420_i2c_reg_read()

int adt7420_i2c_reg_read	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint16_t *	data )

Reads the value of a register I2C interface device.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Pointer to the register value

Returns

register_value - Value of the register.

adt7420_i2c_reg_write()

int adt7420_i2c_reg_write	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint32_t	data )

Write a value of a register via I2C.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Pointer to the register value

Returns

0 in case of success, -1 otherwise.

adt7420_init()

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.

adt7420_is_spi()

bool adt7420_is_spi

(

struct adt7420_dev *

dev

)

Check if the interface of the selected device is SPI.

Parameters

dev	- The device structure.

Returns

True in case of an SPI interface, False Otherwise

adt7420_reg_read()

int adt7420_reg_read	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint16_t *	data )

Reads the value of a register.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Pointer to the register value

Returns

register_value - Value of the register.

adt7420_reg_update_bits()

int adt7420_reg_update_bits	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint8_t	mask,
		uint8_t	value )

Sets the value of a register SPI/I2C.

Parameters

dev	- The device structure.
register_address	- Address of the register.
mask	- Bit Mask of the bit to be written
value	- Value of the bit

Returns

0 in case of success, -1 otherwise.

adt7420_reg_write()

int adt7420_reg_write	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint32_t	data )

Sets the value of a register SPI/I2C.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Data to be written in input register.

Returns

0 in case of success, -1 otherwise.

adt7420_remove()

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.

adt7420_reset()

int32_t adt7420_reset

(

struct adt7420_dev *

dev

)

Resets the SPI or I2C inteface for the ADT7420/ADT7320.

Parameters

dev	- The device structure.

Returns

0 in case of Success, -1 otherwise.

adt7420_set_operation_mode()

int adt7420_set_operation_mode	(	struct adt7420_dev *	dev,
		uint8_t	mode )

Sets the operational mode for ADT7420/ADT7320.

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.

adt7420_set_resolution()

int adt7420_set_resolution	(	struct adt7420_dev *	dev,
		uint8_t	resolution )

Sets the resolution for ADT7420/ADT7320.

Parameters

dev	- The device structure.
resolution	- Resolution. Example: 0 - 13-bit resolution; 1 - 16-bit resolution.

adt7420_spi_reg_read()

int adt7420_spi_reg_read	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint16_t *	data )

Reads the value of a register SPI interface device.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Pointer to the register value

Returns

register_value - Value of the register.

adt7420_spi_reg_write()

int adt7420_spi_reg_write	(	struct adt7420_dev *	dev,
		uint16_t	register_address,
		uint32_t	data )

Write a value of a register via SPI.

Parameters

dev	- The device structure.
register_address	- Address of the register.
data	- Pointer to the register value

Returns

0 in case of success, -1 otherwise.

Variable Documentation

chip_info

const struct adt7420_chip_info chip_info[]

Initial value:

= {
    [ID_ADT7410] = {
        .resolution = 16,
        .communication = I2C,
    },
    [ID_ADT7420] = {
        .resolution = 16,
        .communication = I2C,
    },
    [ID_ADT7422] = {
        .resolution = 16,
        .communication = I2C,
    },
    [ID_ADT7310] = {
        .resolution = 16,
        .communication = SPI,
    },
    [ID_ADT7320] = {
        .resolution = 16,
        .communication = SPI,
    }
}