Header file of AD5791 Driver. More...

#include <stdint.h>
#include "no_os_delay.h"
#include "no_os_gpio.h"
#include "no_os_spi.h"
#include "no_os_util.h"
#include "no_os_error.h"

Include dependency graph for ad5791.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	ad5791_chip_info

struct	ad5791_dev

struct	ad5791_init_param

Macros
#define	AD5791_RESET_OUT

#define	AD5791_RESET_LOW

#define	AD5791_RESET_HIGH

#define	AD5791_CLR_OUT

#define	AD5791_CLR_LOW

#define	AD5791_CLR_HIGH

#define	AD5791_LDAC_OUT

#define	AD5791_LDAC_LOW

#define	AD5791_LDAC_HIGH

#define	MAX_RESOLUTION 20

#define	AD5791_NOP 0

#define	AD5791_REG_DAC 1

#define	AD5791_REG_CTRL 2

#define	AD5791_REG_CLR_CODE 3

#define	AD5791_CMD_WR_SOFT_CTRL 4

#define	AD5791_READ (1ul << 23)

#define	AD5791_WRITE (0ul << 23)

#define	AD5791_ADDR_REG(x) (((uint32_t)(x) & 0x7) << 20)

#define	AD5791_CTRL_LINCOMP_MASK NO_OS_GENMASK(9,6)

#define	AD5791_CTRL_LINCOMP(x) (((x) & 0xF) << 6)

#define	AD5791_CTRL_SDODIS_MASK NO_OS_BIT(5)

#define	AD5791_CTRL_SDODIS(x) ((x & 0x01) << 5)

#define	AD5791_CTRL_BIN2SC_MASK NO_OS_BIT(4)

#define	AD5791_CTRL_BIN2SC(x) ((x & 0x01) << 4)

#define	AD5791_CTRL_DACTRI NO_OS_BIT(3)

#define	AD5791_CTRL_OPGND NO_OS_BIT(2)

#define	AD5791_CTRL_RBUF_MASK NO_OS_BIT(1)

#define	AD5791_CTRL_RBUF(x) ((x & 0x01) << 1)

#define	AD5791_SOFT_CTRL_RESET (1 << 2)

#define	AD5791_SOFT_CTRL_CLR (1 << 1)

#define	AD5791_SOFT_CTRL_LDAC (1 << 0)

#define	AD5791_OUT_NORMAL 0x0

#define	AD5791_OUT_CLAMPED_6K 0x1

#define	AD5791_OUT_TRISTATE 0x2

Enumerations
enum	ad5791_type { ID_AD5760, ID_AD5780, ID_AD5781, ID_AD5790, ID_AD5791 }

enum	ad5791_lin_comp_select { AD5781_SPAN_UPTO_10V = 0, AD5781_SPAN_10V_TO_20V = 4, AD5791_SPAN_10V_TO_12V = 1, AD5791_SPAN_12V_TO_16V = 2, AD5791_SPAN_16V_TO_19V = 3, AD5791_SPAN_19V_TO_20V = 4 }

Functions
int32_t	ad5791_init (struct ad5791_dev **device, struct ad5791_init_param init_param)
	Initializes the communication with the device. More...

int32_t	ad5791_remove (struct ad5791_dev *dev)
	Free the resources allocated by ad5791_init(). More...

int32_t	ad5791_set_register_value (struct ad5791_dev *dev, uint8_t register_address, uint32_t register_value)
	Writes data into a register. More...

int32_t	ad5791_get_register_value (struct ad5791_dev dev, uint8_t register_address, uint32_t value)
	Reads the value of a register. More...

int32_t	ad5791_dac_ouput_state (struct ad5791_dev *dev, uint8_t state)
	Sets the DAC output in one of the three states. More...

int32_t	ad5791_set_dac_value (struct ad5791_dev *dev, uint32_t value)
	Writes to the DAC register. More...

int32_t	ad5791_soft_instruction (struct ad5791_dev *dev, uint8_t instruction_bit)
	Asserts RESET, CLR or LDAC in a software manner. More...

int32_t	ad5791_setup (struct ad5791_dev *dev, uint32_t setup_word)
	Configures the output amplifier, DAC coding, SDO state and the linearity error compensation. More...

int	ad5791_spi_write_mask (struct ad5791_dev *dev, uint8_t register_address, uint32_t mask, uint32_t value)
	SPI write to device using a mask. More...

int	ad5791_set_lin_comp (struct ad5791_dev *dev, enum ad5791_lin_comp_select v_span)
	Set Linearity error compensation based on the reference voltage span. More...

int	ad5791_ldac_trigger (struct ad5791_dev *dev)
	Trigger LDAC. More...

int	ad5791_clear_async (struct ad5791_dev *dev)
	Clear DAC channel output with the clearcode. More...

Detailed Description

Header file of AD5791 Driver.

Author: DNechita (Dan.N.nosp@m.echi.nosp@m.ta@an.nosp@m.alog.nosp@m..com)

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.

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

◆ AD5791_ADDR_REG

#define AD5791_ADDR_REG ( x ) (((uint32_t)(x) & 0x7) << 20)

◆ AD5791_CLR_HIGH

#define AD5791_CLR_HIGH

Value:

no_os_gpio_set_value(dev->gpio_clr, \

NO_OS_GPIO_HIGH)

◆ AD5791_CLR_LOW

#define AD5791_CLR_LOW

Value:

no_os_gpio_set_value(dev->gpio_clr, \

NO_OS_GPIO_LOW)

◆ AD5791_CLR_OUT

#define AD5791_CLR_OUT

Value:

no_os_gpio_direction_output(dev->gpio_clr, \

NO_OS_GPIO_HIGH);

◆ AD5791_CMD_WR_SOFT_CTRL

#define AD5791_CMD_WR_SOFT_CTRL 4

◆ AD5791_CTRL_BIN2SC

#define AD5791_CTRL_BIN2SC ( x ) ((x & 0x01) << 4)

◆ AD5791_CTRL_BIN2SC_MASK

#define AD5791_CTRL_BIN2SC_MASK NO_OS_BIT(4)

◆ AD5791_CTRL_DACTRI

#define AD5791_CTRL_DACTRI NO_OS_BIT(3)

◆ AD5791_CTRL_LINCOMP

#define AD5791_CTRL_LINCOMP ( x ) (((x) & 0xF) << 6)

◆ AD5791_CTRL_LINCOMP_MASK

#define AD5791_CTRL_LINCOMP_MASK NO_OS_GENMASK(9,6)

◆ AD5791_CTRL_OPGND

#define AD5791_CTRL_OPGND NO_OS_BIT(2)

◆ AD5791_CTRL_RBUF

#define AD5791_CTRL_RBUF ( x ) ((x & 0x01) << 1)

◆ AD5791_CTRL_RBUF_MASK

#define AD5791_CTRL_RBUF_MASK NO_OS_BIT(1)

◆ AD5791_CTRL_SDODIS

#define AD5791_CTRL_SDODIS ( x ) ((x & 0x01) << 5)

◆ AD5791_CTRL_SDODIS_MASK

#define AD5791_CTRL_SDODIS_MASK NO_OS_BIT(5)

◆ AD5791_LDAC_HIGH

#define AD5791_LDAC_HIGH

Value:

no_os_gpio_set_value(dev->gpio_ldac, \

NO_OS_GPIO_HIGH)

◆ AD5791_LDAC_LOW

#define AD5791_LDAC_LOW

Value:

no_os_gpio_set_value(dev->gpio_ldac, \

NO_OS_GPIO_LOW)

◆ AD5791_LDAC_OUT

#define AD5791_LDAC_OUT

Value:

no_os_gpio_direction_output(dev->gpio_ldac, \

NO_OS_GPIO_HIGH);

◆ AD5791_NOP

#define AD5791_NOP 0

◆ AD5791_OUT_CLAMPED_6K

#define AD5791_OUT_CLAMPED_6K 0x1

◆ AD5791_OUT_NORMAL

#define AD5791_OUT_NORMAL 0x0

◆ AD5791_OUT_TRISTATE

#define AD5791_OUT_TRISTATE 0x2

◆ AD5791_READ

#define AD5791_READ (1ul << 23)

◆ AD5791_REG_CLR_CODE

#define AD5791_REG_CLR_CODE 3

◆ AD5791_REG_CTRL

#define AD5791_REG_CTRL 2

◆ AD5791_REG_DAC

#define AD5791_REG_DAC 1

◆ AD5791_RESET_HIGH

#define AD5791_RESET_HIGH

Value:

no_os_gpio_set_value(dev->gpio_reset, \

NO_OS_GPIO_HIGH)

◆ AD5791_RESET_LOW

#define AD5791_RESET_LOW

Value:

no_os_gpio_set_value(dev->gpio_reset, \

NO_OS_GPIO_LOW)

◆ AD5791_RESET_OUT

#define AD5791_RESET_OUT

Value:

no_os_gpio_direction_output(dev->gpio_reset, \

NO_OS_GPIO_HIGH);

◆ AD5791_SOFT_CTRL_CLR

#define AD5791_SOFT_CTRL_CLR (1 << 1)

◆ AD5791_SOFT_CTRL_LDAC

#define AD5791_SOFT_CTRL_LDAC (1 << 0)

◆ AD5791_SOFT_CTRL_RESET

#define AD5791_SOFT_CTRL_RESET (1 << 2)

◆ AD5791_WRITE

#define AD5791_WRITE (0ul << 23)

◆ MAX_RESOLUTION

#define MAX_RESOLUTION 20

Enumeration Type Documentation

◆ ad5791_lin_comp_select

enum ad5791_lin_comp_select

Enumerator
AD5781_SPAN_UPTO_10V
AD5781_SPAN_10V_TO_20V
AD5791_SPAN_10V_TO_12V
AD5791_SPAN_12V_TO_16V
AD5791_SPAN_16V_TO_19V
AD5791_SPAN_19V_TO_20V

◆ ad5791_type

enum ad5791_type

Enumerator
ID_AD5760
ID_AD5780
ID_AD5781
ID_AD5790
ID_AD5791

Function Documentation

◆ ad5791_clear_async()

int ad5791_clear_async ( struct ad5791_dev * dev )

Clear DAC channel output with the clearcode.

Parameters

dev	- The device structure.

Returns: 0 in case of success, negative error code otherwise.

◆ ad5791_dac_ouput_state()

int32_t ad5791_dac_ouput_state	(	struct ad5791_dev *	dev,
		uint8_t	state
	)

Sets the DAC output in one of the three states.

Parameters

dev	- The device structure.
state	- The output state. Example: AD5791_OUT_NORMAL - normal operation mode AD5791_OUT_CLAMPED_6K - output is clamped via ~6KOhm to AGND AD5791_OUT_TRISTATE - output is in tristate

Returns: Negative error code or 0 in case of success.

◆ ad5791_get_register_value()

int32_t ad5791_get_register_value	(	struct ad5791_dev *	dev,
		uint8_t	register_address,
		uint32_t *	value
	)

Reads the value of a register.

Parameters

dev	- The device structure.
register_address	- Address of the register. Example: AD5791_REG_DAC - DAC register AD5791_REG_CTRL - Control register AD5791_REG_CLR_CODE - Clearcode register AD5791_CMD_WR_SOFT_CTRL - Software control register
value	- Pointer to the register data.

Returns: dataRead - The register's value or negative error code.

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◆ ad5791_init()

int32_t ad5791_init	(	struct ad5791_dev **	device,
		struct ad5791_init_param	init_param
	)

Initializes the communication with the device.

Parameters

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

Returns: status - Result of the initialization procedure. Example: 0 - if initialization was successful; -1 - if initialization was unsuccessful.

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◆ ad5791_ldac_trigger()

int ad5791_ldac_trigger ( struct ad5791_dev * dev )

Trigger LDAC.

Parameters

dev	- The device structure.

Returns: 0 in case of success, negative error code otherwise.

◆ ad5791_remove()

int32_t ad5791_remove ( struct ad5791_dev * dev )

Free the resources allocated by ad5791_init().

Parameters

dev	- The device structure.

Returns: 0 in case of success, negative error code otherwise.

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◆ ad5791_set_dac_value()

int32_t ad5791_set_dac_value	(	struct ad5791_dev *	dev,
		uint32_t	value
	)

Writes to the DAC register.

Parameters

dev	- The device structure.
value	- The value to be written to DAC.

Returns: Negative error code or 0 in case of success.

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◆ ad5791_set_lin_comp()

int ad5791_set_lin_comp	(	struct ad5791_dev *	dev,
		enum ad5791_lin_comp_select	v_span
	)

Set Linearity error compensation based on the reference voltage span.

Parameters

dev	- The device structure.
v_span	- voltage span to set the corresponding lin_comp value.

Returns: 0 in case of success, negative error code otherwise.

◆ ad5791_set_register_value()

int32_t ad5791_set_register_value	(	struct ad5791_dev *	dev,
		uint8_t	register_address,
		uint32_t	register_value
	)

Writes data into a register.

Parameters

dev	- The device structure.
register_address	- Address of the register. Example: AD5791_REG_DAC - DAC register AD5791_REG_CTRL - Control register AD5791_REG_CLR_CODE - Clearcode register AD5791_CMD_WR_SOFT_CTRL - Software control register
register_value	- Value of the register.

Returns: Returns 0 in case of success or negative error code.

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◆ ad5791_setup()

int32_t ad5791_setup	(	struct ad5791_dev *	dev,
		uint32_t	setup_word
	)

Configures the output amplifier, DAC coding, SDO state and the linearity error compensation.

Parameters

dev	- The device structure.
setup_word	- Is a 24-bit value that sets or clears the Control Register bits : RBUF bit(AD5791_CTRL_RBUF(x)), BIN/2sC bit(AD5791_CTRL_BIN2SC(x)), SDODIS bit(AD5791_CTRL_SDODIS(x)) and LINCOMP bits(AD5791_CTRL_LINCOMP(x)). Example: AD5791_CTRL_BIN2SC(1) \| AD5791_CTRL_RBUF(1) - sets the DAC register to use offset binary coding and powers down the internal output amplifier.

Returns: Negative error code or 0 in case of success.

◆ ad5791_soft_instruction()

int32_t ad5791_soft_instruction	(	struct ad5791_dev *	dev,
		uint8_t	instruction_bit
	)

Asserts RESET, CLR or LDAC in a software manner.

Parameters

dev	- The device structure.
instruction_bit	- A Software Control Register bit. Example: AD5791_SOFT_CTRL_LDAC - Load DAC AD5791_SOFT_CTRL_CLR - Clear AD5791_SOFT_CTRL_RESET - Reset

Returns: Negative error code or 0 in case of success.

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◆ ad5791_spi_write_mask()

int ad5791_spi_write_mask	(	struct ad5791_dev *	dev,
		uint8_t	register_address,
		uint32_t	mask,
		uint32_t	value
	)

SPI write to device using a mask.

Parameters

dev	- The device structure.
register_address	- Address of the register. Example: AD5791_REG_DAC - DAC register AD5791_REG_CTRL - Control register AD5791_REG_CLR_CODE - Clearcode register AD5791_CMD_WR_SOFT_CTRL - Software control register
mask	- The mask.
value	- The register data.

Returns: 0 in case of success, negative error code otherwise.

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Classes

Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ AD5791_ADDR_REG

◆ AD5791_CLR_HIGH

◆ AD5791_CLR_LOW

◆ AD5791_CLR_OUT

◆ AD5791_CMD_WR_SOFT_CTRL

◆ AD5791_CTRL_BIN2SC

◆ AD5791_CTRL_BIN2SC_MASK

◆ AD5791_CTRL_DACTRI

◆ AD5791_CTRL_LINCOMP

◆ AD5791_CTRL_LINCOMP_MASK

◆ AD5791_CTRL_OPGND

◆ AD5791_CTRL_RBUF

◆ AD5791_CTRL_RBUF_MASK

◆ AD5791_CTRL_SDODIS

◆ AD5791_CTRL_SDODIS_MASK

◆ AD5791_LDAC_HIGH

◆ AD5791_LDAC_LOW

◆ AD5791_LDAC_OUT

◆ AD5791_NOP

◆ AD5791_OUT_CLAMPED_6K

◆ AD5791_OUT_NORMAL

◆ AD5791_OUT_TRISTATE

◆ AD5791_READ

◆ AD5791_REG_CLR_CODE

◆ AD5791_REG_CTRL

◆ AD5791_REG_DAC

◆ AD5791_RESET_HIGH

◆ AD5791_RESET_LOW

◆ AD5791_RESET_OUT

◆ AD5791_SOFT_CTRL_CLR

◆ AD5791_SOFT_CTRL_LDAC

◆ AD5791_SOFT_CTRL_RESET

◆ AD5791_WRITE

◆ MAX_RESOLUTION

Enumeration Type Documentation

◆ ad5791_lin_comp_select

◆ ad5791_type

Function Documentation

◆ ad5791_clear_async()

◆ ad5791_dac_ouput_state()

◆ ad5791_get_register_value()

◆ ad5791_init()

◆ ad5791_ldac_trigger()

◆ ad5791_remove()

◆ ad5791_set_dac_value()

◆ ad5791_set_lin_comp()

◆ ad5791_set_register_value()

◆ ad5791_setup()

◆ ad5791_soft_instruction()

◆ ad5791_spi_write_mask()