ad7490.h File Reference

Header file of AD7490 Driver. More...

#include <stdlib.h>
#include "no_os_spi.h"
#include "no_os_util.h"

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Classes
struct	ad7490_init_param
struct	ad7490_desc

Macros
#define	AD7490_LOW_BYTE_MASK   NO_OS_GENMASK(7, 0)
#define	AD7490_HIGH_BYTE_MASK   NO_OS_GENMASK(15, 8)
#define	AD7490_VAL_MASK   NO_OS_GENMASK(11, 0)
#define	AD7490_WRITE_MASK   NO_OS_BIT(11)
#define	AD7490_SEQ_MASK   NO_OS_BIT(10)
#define	AD7490_ADD_MASK   NO_OS_GENMASK(9, 6)
#define	AD7490_PM_MASK   NO_OS_GENMASK(5, 4)
#define	AD7490_SHADOW_MASK   NO_OS_BIT(3)
#define	AD7490_WEAKTRI_MASK   NO_OS_BIT(2)
#define	AD7490_RANGE_MASK   NO_OS_BIT(1)
#define	AD7490_CODING_MASK   NO_OS_BIT(0)
#define	AD7490_CFG_MASK   NO_OS_GENMASK(2, 0)

Enumerations
enum	ad7490_vdd {   AD7490_VDD_3V3 ,   AD7490_VDD_5V }
enum	ad7490_address {   AD7490_CHAN_ADDR_VIN0 ,   AD7490_CHAN_ADDR_VIN1 ,   AD7490_CHAN_ADDR_VIN2 ,   AD7490_CHAN_ADDR_VIN3 ,   AD7490_CHAN_ADDR_VIN4 ,   AD7490_CHAN_ADDR_VIN5 ,   AD7490_CHAN_ADDR_VIN6 ,   AD7490_CHAN_ADDR_VIN7 ,   AD7490_CHAN_ADDR_VIN8 ,   AD7490_CHAN_ADDR_VIN9 ,   AD7490_CHAN_ADDR_VIN10 ,   AD7490_CHAN_ADDR_VIN11 ,   AD7490_CHAN_ADDR_VIN12 ,   AD7490_CHAN_ADDR_VIN13 ,   AD7490_CHAN_ADDR_VIN14 ,   AD7490_CHAN_ADDR_VIN15 ,   AD7490_CHAN_OFF }
enum	ad7490_op_mode {   AD7490_MODE_AUTOSTANDBY ,   AD7490_MODE_AUTOSHUTDOWN ,   AD7490_MODE_FULLSHUTDOWN ,   AD7490_MODE_NORMAL }
enum	ad7490_dout_state {   AD7490_DOUT_TRISTATE ,   AD7490_DOUT_WEAK }
enum	ad7490_range {   AD7490_RANGE_2XREFIN ,   AD7490_RANGE_REFIN }
enum	ad7490_coding {   AD7490_CODING_TWOS ,   AD7490_CODING_BINARY }
enum	ad7490_seq_op {   AD7490_NO_SEQ ,   AD7490_SHADOW_SEQ ,   AD7490_CONTROL_SEQ ,   AD7490_CONSECUTIVE_SEQ }

Functions
int	ad7490_set_op_mode (struct ad7490_desc *desc, enum ad7490_op_mode op_mode)
	Set AD7490 operating mode.
int	ad7490_config (struct ad7490_desc *desc, enum ad7490_dout_state dout_state, enum ad7490_range range, enum ad7490_coding coding)
	Config DOUT state, range and coding of the AD7490.
int	ad7490_read_ch (struct ad7490_desc *desc, enum ad7490_address channel, int16_t *val)
	Read single cannel raw value.
int	ad7490_start_seq (struct ad7490_desc *desc, enum ad7490_seq_op seq_op, uint16_t channels, enum ad7490_address last_chan)
	Start AD7490 SEQUENCER using desired type.
int	ad7490_change_seq (struct ad7490_desc *desc, enum ad7490_seq_op seq_op, enum ad7490_coding coding, enum ad7490_range range)
	Change AD7490 SEQUENCER type while it is active.
int	ad7490_stop_seq (struct ad7490_desc *desc)
	Stop AD7490 SEQUENCER.
int	ad7490_read_seq (struct ad7490_desc *desc, int16_t *channels_val)
	Read selected channels of the SEQUENCER raw values.
int	ad7490_init (struct ad7490_desc **desc, struct ad7490_init_param *init_param)
	AD7490 Initialization function.
int	ad7490_remove (struct ad7490_desc *desc)
	Free the resources allocated by initialization.

Detailed Description

Header file of AD7490 Driver.

Author

Radu Sabau (radu..nosp@m.saba.nosp@m.u@ana.nosp@m.log..nosp@m.com)

Copyright 2025(c) Analog Devices, Inc.

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

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. 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.
3. 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.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 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.

Macro Definition Documentation

AD7490_ADD_MASK

#define AD7490_ADD_MASK   NO_OS_GENMASK(9, 6)

AD7490_CFG_MASK

#define AD7490_CFG_MASK   NO_OS_GENMASK(2, 0)

AD7490_CODING_MASK

#define AD7490_CODING_MASK   NO_OS_BIT(0)

AD7490_HIGH_BYTE_MASK

#define AD7490_HIGH_BYTE_MASK   NO_OS_GENMASK(15, 8)

AD7490_LOW_BYTE_MASK

#define AD7490_LOW_BYTE_MASK   NO_OS_GENMASK(7, 0)

AD7490_PM_MASK

#define AD7490_PM_MASK   NO_OS_GENMASK(5, 4)

AD7490_RANGE_MASK

#define AD7490_RANGE_MASK   NO_OS_BIT(1)

AD7490_SEQ_MASK

#define AD7490_SEQ_MASK   NO_OS_BIT(10)

AD7490_SHADOW_MASK

#define AD7490_SHADOW_MASK   NO_OS_BIT(3)

AD7490_VAL_MASK

#define AD7490_VAL_MASK   NO_OS_GENMASK(11, 0)

AD7490_WEAKTRI_MASK

#define AD7490_WEAKTRI_MASK   NO_OS_BIT(2)

AD7490_WRITE_MASK

#define AD7490_WRITE_MASK   NO_OS_BIT(11)

Enumeration Type Documentation

ad7490_address

enum ad7490_address

Enumerator
AD7490_CHAN_ADDR_VIN0
AD7490_CHAN_ADDR_VIN1
AD7490_CHAN_ADDR_VIN2
AD7490_CHAN_ADDR_VIN3
AD7490_CHAN_ADDR_VIN4
AD7490_CHAN_ADDR_VIN5
AD7490_CHAN_ADDR_VIN6
AD7490_CHAN_ADDR_VIN7
AD7490_CHAN_ADDR_VIN8
AD7490_CHAN_ADDR_VIN9
AD7490_CHAN_ADDR_VIN10
AD7490_CHAN_ADDR_VIN11
AD7490_CHAN_ADDR_VIN12
AD7490_CHAN_ADDR_VIN13
AD7490_CHAN_ADDR_VIN14
AD7490_CHAN_ADDR_VIN15
AD7490_CHAN_OFF

ad7490_coding

enum ad7490_coding

Enumerator
AD7490_CODING_TWOS
AD7490_CODING_BINARY

ad7490_dout_state

enum ad7490_dout_state

Enumerator
AD7490_DOUT_TRISTATE
AD7490_DOUT_WEAK

ad7490_op_mode

enum ad7490_op_mode

Enumerator
AD7490_MODE_AUTOSTANDBY
AD7490_MODE_AUTOSHUTDOWN
AD7490_MODE_FULLSHUTDOWN
AD7490_MODE_NORMAL

ad7490_range

enum ad7490_range

Enumerator
AD7490_RANGE_2XREFIN
AD7490_RANGE_REFIN

ad7490_seq_op

enum ad7490_seq_op

Enumerator
AD7490_NO_SEQ
AD7490_SHADOW_SEQ
AD7490_CONTROL_SEQ
AD7490_CONSECUTIVE_SEQ

ad7490_vdd

enum ad7490_vdd

Enumerator
AD7490_VDD_3V3
AD7490_VDD_5V

Function Documentation

ad7490_change_seq()

int ad7490_change_seq	(	struct ad7490_desc *	desc,
		enum ad7490_seq_op	seq_op,
		enum ad7490_coding	coding,
		enum ad7490_range	range )

Change AD7490 SEQUENCER type while it is active.

Parameters

desc	- AD7490 device descriptor.
seq_op	- Selected SEQUENCER type to change to.
coding	- If CONTROL sequencer is selected, coding is requested.
range	-If CONTROL sequencer is selected, range is requested.

Returns

0 in case of success, negative error code otherwise.

ad7490_config()

int ad7490_config	(	struct ad7490_desc *	desc,
		enum ad7490_dout_state	dout_state,
		enum ad7490_range	range,
		enum ad7490_coding	coding )

Config DOUT state, range and coding of the AD7490.

Parameters

desc	- AD7490 device descriptor.
dout_state	- Selected DOUT state.
range	- Selected range (REFIN or 2xREFIN)
coding	- Selected coding style (binary or twos)

Returns

0 in case of success, negative error code otherwise.

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ad7490_init()

int ad7490_init	(	struct ad7490_desc **	desc,
		struct ad7490_init_param *	init_param )

AD7490 Initialization function.

Parameters

desc	- AD7490 device descriptor.
init_param	- AD7490 initialization parameter.

Returns

0 in case of success, negative error code otherwise.

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ad7490_read_ch()

int ad7490_read_ch	(	struct ad7490_desc *	desc,
		enum ad7490_address	channel,
		int16_t *	val )

Read single cannel raw value.

Parameters

desc	- AD7490 device descriptor.
channel	- Selected channel for value reading.
val	- Pointer to the selected channel's raw value.

Returns

0 in case of success, negative error code otherwise.

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ad7490_read_seq()

int ad7490_read_seq	(	struct ad7490_desc *	desc,
		int16_t *	channels_val )

Read selected channels of the SEQUENCER raw values.

Parameters

desc	- AD7490 device descriptor.
channels_val	- Pointer to selected channels raw values array. Raw channels values are to be transmitted consecutive (e.g. if channels 0, 3, and 7 are selected, channels_val becomes an array with 3 elements, and index 0 is for channel 0, index 1 for channel 3, and index 2 for channel 7).

Returns

0 in case of success, negative error code otherwise.

ad7490_remove()

int ad7490_remove

(

struct ad7490_desc *

desc

)

Free the resources allocated by initialization.

Parameters

desc	- AD7490 device descriptor.

Returns

0 in case of success, negative error code otherwise.

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ad7490_set_op_mode()

int ad7490_set_op_mode	(	struct ad7490_desc *	desc,
		enum ad7490_op_mode	op_mode )

Set AD7490 operating mode.

Parameters

desc	- AD7490 device descriptor
op_mode	- Selected operating mode.

Returns

0 in case of success, negative error code otherwise.

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ad7490_start_seq()

int ad7490_start_seq	(	struct ad7490_desc *	desc,
		enum ad7490_seq_op	seq_op,
		uint16_t	channels,
		enum ad7490_address	last_chan )

Start AD7490 SEQUENCER using desired type.

Parameters

desc	- AD7490 device descriptor.
seq_op	- Selected SEQUENCER type.
channels	- 16 bit channel mask for channel selection (1 = ON, 0 = OFF)
last_chan	- In case CONSECUTIVE sequencer typee is selected, last channel is needed for conversion and all channels until the last one will be then selected.

Returns

0 in case of success, negative error code otherwise.

ad7490_stop_seq()

int ad7490_stop_seq

(

struct ad7490_desc *

desc

)

Stop AD7490 SEQUENCER.

Parameters

desc	- AD7490 device descriptor.

Returns

0 in case of success, negative error code otherwise.

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