ad74xx.c File Reference

Implementation of AD74xx Driver. More...

#include <stdlib.h>
#include "ad74xx.h"
#include "no_os_alloc.h"

Include dependency graph for ad74xx.c:

Functions
int8_t	ad74xx_init (struct ad74xx_dev **device, struct ad74xx_init_param init_param)
	Initializes the communication peripheral and the initial Values for AD74xx Board. More...
int32_t	ad74xx_remove (struct ad74xx_dev *dev)
	Free the resources allocated by ad74xx_init(). More...
void	ad74xx_power_down (struct ad74xx_dev *dev)
	Powers down the device. This function is supported only by: AD7475(partial power down), AD7476, AD7477, AD7478, AD7476A, AD7477A, AD7478A, AD7479(partial power down). More...
void	ad74xx_power_up (struct ad74xx_dev *dev)
	Powers up the device by performing a dummy read. This function is supported only by: AD7475(partial power down), AD7476, AD7477, AD7478, AD7476A, AD7477A, AD7478A, AD7479(partial power down). More...
uint16_t	ad74xx_get_register_value (struct ad74xx_dev *dev)
	Reads the conversion value. More...
float	ad74xx_convert_to_volts (struct ad74xx_dev *dev, uint16_t raw_value, float v_ref)
	Converts a raw sample to volts. More...

Detailed Description

Implementation of AD74xx Driver.

Author

DNechita(Dan.N.nosp@m.echi.nosp@m.ta@an.nosp@m.alog.nosp@m..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.

Function Documentation

ad74xx_convert_to_volts()

float ad74xx_convert_to_volts	(	struct ad74xx_dev *	dev,
		uint16_t	raw_value,
		float	v_ref
	)

Converts a raw sample to volts.

Parameters

dev	- The device structure.
raw_value	- The data sample.
v_ref	- The value of the voltage reference used by the device.

Returns

voltage - The result of the conversion expressed as volts.

ad74xx_get_register_value()

uint16_t ad74xx_get_register_value

(

struct ad74xx_dev *

dev

)

Reads the conversion value.

Parameters

dev	- The device structure.

Returns

convResult - conversion data.

ad74xx_init()

int8_t ad74xx_init	(	struct ad74xx_dev **	device,
		struct ad74xx_init_param	init_param
	)

Initializes the communication peripheral and the initial Values for AD74xx Board.

Parameters

device	- The device structure.
init_param	- The structure that contains the device initial parameters.

Returns

ret - The result of the initialization procedure. Example: -1 - SPI peripheral was not initialized or the device is not present. 0 - SPI peripheral was initialized and the device is present.

ad74xx_power_down()

void ad74xx_power_down

(

struct ad74xx_dev *

dev

)

Powers down the device. This function is supported only by: AD7475(partial power down), AD7476, AD7477, AD7478, AD7476A, AD7477A, AD7478A, AD7479(partial power down).

Parameters

dev	- The device structure.

Returns

None.

ad74xx_power_up()

void ad74xx_power_up

(

struct ad74xx_dev *

dev

)

Powers up the device by performing a dummy read. This function is supported only by: AD7475(partial power down), AD7476, AD7477, AD7478, AD7476A, AD7477A, AD7478A, AD7479(partial power down).

Parameters

dev	- The device structure.

Returns

None.

ad74xx_remove()

int32_t ad74xx_remove

(

struct ad74xx_dev *

dev

)

Free the resources allocated by ad74xx_init().

Parameters

dev	- The device structure.

Returns

ret - The result of the remove procedure.