Implementation of AD7746 Driver. More...

#include <stdlib.h>
#include <string.h>
#include "no_os_error.h"
#include "no_os_delay.h"
#include "no_os_alloc.h"
#include "ad7746.h"

Include dependency graph for ad7746.c:

Functions
int32_t	ad7746_init (struct ad7746_dev *device, struct ad7746_init_param init_param)
	Initialize the ad7606 device structure. More...

int32_t	ad7746_reg_write (struct ad7746_dev dev, uint8_t reg, uint8_t data, uint16_t bytes_number)
	Writes data into AD7746 registers, starting from the selected register address pointer. More...

int32_t	ad7746_reg_read (struct ad7746_dev dev, uint8_t reg, uint8_t data, uint16_t bytes_number)
	Reads data from AD7746 registers, starting from the selected register address pointer. More...

int32_t	ad7746_reset (struct ad7746_dev *dev)
	Resets the AD7746. More...

int32_t	ad7746_remove (struct ad7746_dev *dev)
	Deinitialize the ad7746 driver and free all allocated resources. More...

int32_t	ad7746_set_cap (struct ad7746_dev *dev, struct ad7746_cap cap)
	Configure the capacitive setup register. More...

int32_t	ad7746_set_vt (struct ad7746_dev *dev, struct ad7746_vt vt)
	Configure the voltage/temperature setup register. More...

int32_t	ad7746_set_exc (struct ad7746_dev *dev, struct ad7746_exc exc)
	Configure the excitation setup register. More...

int32_t	ad7746_set_config (struct ad7746_dev *dev, struct ad7746_config config)
	Set the configuration register. More...

int32_t	ad7746_set_cap_dac_a (struct ad7746_dev *dev, bool enable, uint8_t code)
	Set the DAC code and enable state for EXCA. More...

int32_t	ad7746_set_cap_dac_b (struct ad7746_dev *dev, bool enable, uint8_t code)
	Set the DAC code and enable state for EXCB. More...

int32_t	ad7746_set_cap_offset (struct ad7746_dev *dev, uint16_t offset)
	Set the capacitive offset. More...

int32_t	ad7746_set_cap_gain (struct ad7746_dev *dev, uint16_t gain)
	Set the capacitive gain. More...

int32_t	ad7746_set_volt_gain (struct ad7746_dev *dev, uint16_t gain)
	Set the voltage gain. More...

int32_t	ad7746_get_vt_data (struct ad7746_dev dev, uint32_t vt_data)
	Waits until a conversion on a voltage/temperature channel has been finished and returns the output data. More...

int32_t	ad7746_get_cap_data (struct ad7746_dev dev, uint32_t cap_data)
	Waits until a conversion on the capacitive channel has been finished and returns the output data. More...

int32_t	ad7746_calibrate (struct ad7746_dev *dev, enum ad7746_md md)
	Perform offset/gain calibration. More...

Detailed Description

Implementation of AD7746 Driver.

Author: Dragos Bogdan (drago.nosp@m.s.bo.nosp@m.gdan@.nosp@m.anal.nosp@m.og.co.nosp@m.m); Darius Berghe (dariu.nosp@m.s.be.nosp@m.rghe@.nosp@m.anal.nosp@m.og.co.nosp@m.m)

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.

Function Documentation

◆ ad7746_calibrate()

int32_t ad7746_calibrate	(	struct ad7746_dev *	dev,
		enum ad7746_md	md
	)

Perform offset/gain calibration.

Parameters

dev	- Device descriptor pointer.
md	- AD7746 calibration mode specifier.

Returns: return code. Example: -EINVAL - Wrong input values. -EIO - I2C Communication error. 0 - No errors encountered.

◆ ad7746_get_cap_data()

int32_t ad7746_get_cap_data	(	struct ad7746_dev *	dev,
		uint32_t *	cap_data
	)

Waits until a conversion on the capacitive channel has been finished and returns the output data.

Parameters

dev	- Device descriptor pointer.
cap_data	- The content of the Capacitive Data register.

Returns: return code. Example: -EINVAL - Wrong input values. -EIO - I2C Communication error. 0 - No errors encountered.

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◆ ad7746_get_vt_data()

int32_t ad7746_get_vt_data	(	struct ad7746_dev *	dev,
		uint32_t *	vt_data
	)

Waits until a conversion on a voltage/temperature channel has been finished and returns the output data.

Parameters

dev	- Device descriptor pointer.
vt_data	- The content of the VT Data register.

Returns: return code. Example: -EINVAL - Wrong input values. -EIO - I2C Communication error. 0 - No errors encountered.

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◆ ad7746_init()

int32_t ad7746_init	(	struct ad7746_dev **	device,
		struct ad7746_init_param *	init_param
	)

Initialize the ad7606 device structure.

Performs memory allocation of the device structure.

Parameters

device	- Pointer to location of device structure to write.
init_param	- Pointer to the configuration of the driver.

Returns: ret - return code. Example: -ENOMEM - Memory allocation error. -EIO - I2C communication error. 0 - No errors encountered.

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◆ ad7746_reg_read()

int32_t ad7746_reg_read	(	struct ad7746_dev *	dev,
		uint8_t	reg,
		uint8_t *	data,
		uint16_t	bytes_number
	)

Reads data from AD7746 registers, starting from the selected register address pointer.

Parameters

dev	- Device descriptor pointer.
reg	- The selected register address pointer.
data	- Pointer to a buffer that will store the received data.
bytes_number	- Number of bytes to read (typically 1, other values when using the address auto-increment).

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_reg_write()

int32_t ad7746_reg_write	(	struct ad7746_dev *	dev,
		uint8_t	reg,
		uint8_t *	data,
		uint16_t	bytes_number
	)

Writes data into AD7746 registers, starting from the selected register address pointer.

Parameters

dev	- Device descriptor pointer.
reg	- The selected register address.
data	- Pointer to data to transmit.
bytes_number	- Number of bytes to send (typically 1, other values when using the address auto-increment).

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_remove()

int32_t ad7746_remove ( struct ad7746_dev * dev )

Deinitialize the ad7746 driver and free all allocated resources.

Parameters

dev	- Device descriptor pointer.

Returns: 0

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◆ ad7746_reset()

int32_t ad7746_reset ( struct ad7746_dev * dev )

Resets the AD7746.

Parameters

dev	- Device descriptor pointer.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_set_cap()

int32_t ad7746_set_cap	(	struct ad7746_dev *	dev,
		struct ad7746_cap	cap
	)

Configure the capacitive setup register.

Parameters

dev	- Device descriptor pointer.
cap	- Capacitive setup settings.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_set_cap_dac_a()

int32_t ad7746_set_cap_dac_a	(	struct ad7746_dev *	dev,
		bool	enable,
		uint8_t	code
	)

Set the DAC code and enable state for EXCA.

Parameters

dev	- Device descriptor pointer.
enable	- DAC_A Enable.
code	- DAC_A register code.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_set_cap_dac_b()

int32_t ad7746_set_cap_dac_b	(	struct ad7746_dev *	dev,
		bool	enable,
		uint8_t	code
	)

Set the DAC code and enable state for EXCB.

Parameters

dev	- Device descriptor pointer.
enable	- DAC_B Enable.
code	- DAC_B register code.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

◆ ad7746_set_cap_gain()

int32_t ad7746_set_cap_gain	(	struct ad7746_dev *	dev,
		uint16_t	gain
	)

Set the capacitive gain.

Parameters

dev	- Device descriptor pointer.
gain	- Gain as raw code.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

◆ ad7746_set_cap_offset()

int32_t ad7746_set_cap_offset	(	struct ad7746_dev *	dev,
		uint16_t	offset
	)

Set the capacitive offset.

Parameters

dev	- Device descriptor pointer.
offset	- Offset as raw code.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

◆ ad7746_set_config()

int32_t ad7746_set_config	(	struct ad7746_dev *	dev,
		struct ad7746_config	config
	)

Set the configuration register.

Parameters

dev	- Device descriptor pointer.
config	- Configuration register settings.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_set_exc()

int32_t ad7746_set_exc	(	struct ad7746_dev *	dev,
		struct ad7746_exc	exc
	)

Configure the excitation setup register.

Parameters

dev	- Device descriptor pointer.
exc	- Excitation setup settings.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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◆ ad7746_set_volt_gain()

int32_t ad7746_set_volt_gain	(	struct ad7746_dev *	dev,
		uint16_t	gain
	)

Set the voltage gain.

Parameters

dev	- Device descriptor pointer.
gain	- Gain as raw code.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

◆ ad7746_set_vt()

int32_t ad7746_set_vt	(	struct ad7746_dev *	dev,
		struct ad7746_vt	vt
	)

Configure the voltage/temperature setup register.

Parameters

dev	- Device descriptor pointer.
vt	- Voltage/Temperature setup settings.

Returns: return code. Example: -EINVAL - Wrong input values. 0 - No errors encountered.

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Functions

Detailed Description

Function Documentation

◆ ad7746_calibrate()

◆ ad7746_get_cap_data()

◆ ad7746_get_vt_data()

◆ ad7746_init()

◆ ad7746_reg_read()

◆ ad7746_reg_write()

◆ ad7746_remove()

◆ ad7746_reset()

◆ ad7746_set_cap()

◆ ad7746_set_cap_dac_a()

◆ ad7746_set_cap_dac_b()

◆ ad7746_set_cap_gain()

◆ ad7746_set_cap_offset()

◆ ad7746_set_config()

◆ ad7746_set_exc()

◆ ad7746_set_volt_gain()

◆ ad7746_set_vt()