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.

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.

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.

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

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

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

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

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

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

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.

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.

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

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

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

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.

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.

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

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)

SPDX-License-Identifier: BSD-3-Clause

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.

◆ 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.

◆ 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.

◆ 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.

◆ 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.

◆ 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

◆ 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.

◆ 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.

◆ 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.

◆ 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.

◆ 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.

◆ 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.

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()