Implementation of AD7190/2/3/4/5 Driver. More...

#include <stdlib.h>
#include "ad719x.h"
#include "no_os_error.h"
#include "no_os_delay.h"
#include "no_os_alloc.h"
#include <string.h>

Include dependency graph for ad719x.c:

Functions
int	ad719x_init (struct ad719x_dev **device, struct ad719x_init_param init_param)
	Initializes the communication peripheral and the initial Values for AD719X Board and resets the device. More...

int	ad719x_remove (struct ad719x_dev *dev)
	Free the resources allocated by ad719x_init(). More...

int	ad719x_set_register_value (struct ad719x_dev *dev, uint8_t reg_addr, uint32_t reg_val, uint8_t bytes_number)
	Writes data into a register. More...

int	ad719x_get_register_value (struct ad719x_dev dev, uint8_t reg_addr, uint8_t bytes_number, uint32_t reg_data)
	Reads the value of a register. More...

int	ad719x_set_masked_register_value (struct ad719x_dev *dev, uint8_t reg_addr, uint32_t mask, uint32_t reg_data, uint8_t bytes)
	Write masked data into device register. More...

int	ad719x_reset (struct ad719x_dev *dev)
	Resets the device. More...

int	ad719x_set_operating_mode (struct ad719x_dev *dev, enum ad719x_adc_modes opt_mode)
	Sets device into the specified operating mode. More...

int	ad719x_wait_rdy_go_low (struct ad719x_dev *dev)
	Waits for RDY pin to go low. More...

int	ad719x_channels_select (struct ad719x_dev *dev, uint16_t chn_mask)
	Selects the channels to be enabled. More...

int	ad719x_calibrate (struct ad719x_dev *dev, uint8_t mode, uint8_t channel)
	Performs the given calibration to the specified channel. More...

int	ad719x_config_input_mode (struct ad719x_dev *dev, uint8_t mode)
	Configures the input mode of the ADC. More...

int	ad719x_buffer_select (struct ad719x_dev *dev, uint8_t buff_en)
	Enables or disables the buffer on the ADC input channels. More...

int	ad719x_output_rate_select (struct ad719x_dev *dev, uint16_t out_rate_code)
	Selects the filter output data rate of the ADC. More...

int	ad719x_clock_select (struct ad719x_dev *dev, enum ad719x_adc_clock clk_select)
	Selects the clock source of the ADC. More...

int	ad719x_set_bridge_switch (struct ad719x_dev *dev, uint8_t bpdsw_select)
	Opens or closes the bridge power-down switch of the ADC. More...

int	ad719x_range_setup (struct ad719x_dev *dev, uint8_t polarity, enum ad719x_adc_gain gain)
	Selects the polarity of the conversion and the ADC input range. More...

int	ad719x_single_conversion (struct ad719x_dev dev, uint32_t reg_data)
	Returns the result of a single conversion. More...

int	ad719x_continuous_read_avg (struct ad719x_dev dev, uint8_t sample_number, uint32_t samples_avg)
	Returns the average of several conversion results. More...

int	ad719x_temperature_read (struct ad719x_dev dev, float temp)
	Read data from temperature sensor and converts it to Celsius degrees. More...

float	ad719x_convert_to_volts (struct ad719x_dev *dev, uint32_t raw_data, float v_ref)
	Converts 24-bit raw data to milivolts. More...

int	ad719x_sync_control (struct ad719x_dev *dev, uint8_t value)
	Control SYNC pin for synchronization of multiple devices. More...

Detailed Description

Implementation of AD7190/2/3/4/5 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.

Function Documentation

◆ ad719x_buffer_select()

int ad719x_buffer_select	(	struct ad719x_dev *	dev,
		uint8_t	buff_en
	)

Enables or disables the buffer on the ADC input channels.

Parameters

dev	- The device structure.
buff_en	- Enable/disable option. Example: 0 - Buffer disabled 1 - Buffer Enabled

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

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◆ ad719x_calibrate()

int ad719x_calibrate	(	struct ad719x_dev *	dev,
		uint8_t	mode,
		uint8_t	channel
	)

Performs the given calibration to the specified channel.

Parameters

dev	- The device structure.
mode	- Calibration type.
channel	- Channel to be calibrated.

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

◆ ad719x_channels_select()

int ad719x_channels_select	(	struct ad719x_dev *	dev,
		uint16_t	chn_mask
	)

Selects the channels to be enabled.

Parameters

dev	- The device structure.
chn_mask	- Channel mask. Example: AD719X_CH_0 - AIN1(+) - AIN2(-); (Pseudo = 0) AD719X_CH_1 - AIN3(+) - AIN4(-); (Pseudo = 0) AD719X_TEMP - Temperature sensor AD719X_SHORT - AIN2(+) - AIN2(-); (Pseudo = 0)

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

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◆ ad719x_clock_select()

int ad719x_clock_select	(	struct ad719x_dev *	dev,
		enum ad719x_adc_clock	clk_select
	)

Selects the clock source of the ADC.

Parameters

dev	- The device structure.
clk_select	- Clock source to be selected. Accepted values: AD719X_EXT_CRYSTAL_MCLK1_MCLK2 AD719X_EXT_CRYSTAL_MCLK2 AD719X_INT_CLK_4_92_MHZ_TRIST AD719X_INT_CLK_4_92_MHZ

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

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◆ ad719x_config_input_mode()

int ad719x_config_input_mode	(	struct ad719x_dev *	dev,
		uint8_t	mode
	)

Configures the input mode of the ADC.

Parameters

dev	- The device structure.
mode	- Mode selection. Example: 0 - Differential Analog Inputs 1 - Pseudo Differential Analog Inputs

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

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◆ ad719x_continuous_read_avg()

int ad719x_continuous_read_avg	(	struct ad719x_dev *	dev,
		uint8_t	sample_number,
		uint32_t *	samples_avg
	)

Returns the average of several conversion results.

Parameters

dev	- The device structure.
sample_number	- the number of samples
samples_avg	- Average of the samples read

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

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◆ ad719x_convert_to_volts()

float ad719x_convert_to_volts	(	struct ad719x_dev *	dev,
		uint32_t	raw_data,
		float	v_ref
	)

Converts 24-bit raw data to milivolts.

Parameters

dev	- The device structure.
raw_data	- 24-bit data sample.
v_ref	- The value of the voltage reference used by the device.

Returns: voltage - The result of the conversion expressed as volts.

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◆ ad719x_get_register_value()

int ad719x_get_register_value	(	struct ad719x_dev *	dev,
		uint8_t	reg_addr,
		uint8_t	bytes_number,
		uint32_t *	reg_data
	)

Reads the value of a register.

Parameters

dev	- The device structure.
reg_addr	- Address of the register.
bytes_number	- Number of bytes that will be read.
reg_data	- Data read from the register.

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

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◆ ad719x_init()

int ad719x_init	(	struct ad719x_dev **	device,
		struct ad719x_init_param	init_param
	)

Initializes the communication peripheral and the initial Values for AD719X Board and resets the device.

Parameters

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

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

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◆ ad719x_output_rate_select()

int ad719x_output_rate_select	(	struct ad719x_dev *	dev,
		uint16_t	out_rate_code
	)

Selects the filter output data rate of the ADC.

Parameters

dev	- The device structure.
out_rate_code	- Filter output data rate code.

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

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◆ ad719x_range_setup()

int ad719x_range_setup	(	struct ad719x_dev *	dev,
		uint8_t	polarity,
		enum ad719x_adc_gain	gain
	)

Selects the polarity of the conversion and the ADC input range.

Parameters

dev	- The device structure.
polarity	- Polarity select bit. Example: 0 - bipolar operation is selected. 1 - unipolar operation is selected.
gain	- Gain select bits. These bits are written by the user to select the ADC input range.

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

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◆ ad719x_remove()

int ad719x_remove ( struct ad719x_dev * dev )

Free the resources allocated by ad719x_init().

Parameters

dev	- The device structure.

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

◆ ad719x_reset()

int ad719x_reset ( struct ad719x_dev * dev )

Resets the device.

Parameters

dev	- The device structure.

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

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◆ ad719x_set_bridge_switch()

int ad719x_set_bridge_switch	(	struct ad719x_dev *	dev,
		uint8_t	bpdsw_select
	)

Opens or closes the bridge power-down switch of the ADC.

Parameters

dev	- The device structure.
bpdsw_select	- Option to open or close bridge power-down switch. 0 - Switch Opened 1 - Switch Closed

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

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◆ ad719x_set_masked_register_value()

int ad719x_set_masked_register_value	(	struct ad719x_dev *	dev,
		uint8_t	reg_addr,
		uint32_t	mask,
		uint32_t	reg_data,
		uint8_t	bytes
	)

Write masked data into device register.

Parameters

dev	- The device structure.
reg_addr	- Address of the register.
mask	- The mask.
reg_data	- Register data to be written.
bytes	- Number of bytes that will be read.

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

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◆ ad719x_set_operating_mode()

int ad719x_set_operating_mode	(	struct ad719x_dev *	dev,
		enum ad719x_adc_modes	opt_mode
	)

Sets device into the specified operating mode.

Parameters

dev	- The device structure.
opt_mode	- Operating mode to be set. Accepted values: AD719X_MODE_CONT AD719X_MODE_SINGLE AD719X_MODE_IDLE AD719X_MODE_PWRDN AD719X_MODE_CAL_INT_ZERO AD719X_MODE_CAL_INT_FULL AD719X_MODE_CAL_SYS_ZERO AD719X_MODE_CAL_SYS_FULL

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

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◆ ad719x_set_register_value()

int ad719x_set_register_value	(	struct ad719x_dev *	dev,
		uint8_t	reg_addr,
		uint32_t	reg_val,
		uint8_t	bytes_number
	)

Writes data into a register.

Parameters

dev	- The device structure.
reg_addr	- Address of the register.
reg_val	- Data value to write.
bytes_number	- Number of bytes to be written.

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

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◆ ad719x_single_conversion()

int ad719x_single_conversion	(	struct ad719x_dev *	dev,
		uint32_t *	reg_data
	)

Returns the result of a single conversion.

Parameters

dev	- The device structure.
reg_data	- Buffer to store sampled register data

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

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◆ ad719x_sync_control()

int ad719x_sync_control	(	struct ad719x_dev *	dev,
		uint8_t	value
	)

Control SYNC pin for synchronization of multiple devices.

Parameters

dev	- The device structure.
value	- Pin level to be written. 0 - LOW 1 - HIGH

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

◆ ad719x_temperature_read()

int ad719x_temperature_read	(	struct ad719x_dev *	dev,
		float *	temp
	)

Read data from temperature sensor and converts it to Celsius degrees.

Parameters

dev	- The device structure.
temp	- Stores the temperature result.

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

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◆ ad719x_wait_rdy_go_low()

int ad719x_wait_rdy_go_low ( struct ad719x_dev * dev )

Waits for RDY pin to go low.

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

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Functions

Detailed Description

Function Documentation

◆ ad719x_buffer_select()

◆ ad719x_calibrate()

◆ ad719x_channels_select()

◆ ad719x_clock_select()

◆ ad719x_config_input_mode()

◆ ad719x_continuous_read_avg()

◆ ad719x_convert_to_volts()

◆ ad719x_get_register_value()

◆ ad719x_init()

◆ ad719x_output_rate_select()

◆ ad719x_range_setup()

◆ ad719x_remove()

◆ ad719x_reset()

◆ ad719x_set_bridge_switch()

◆ ad719x_set_masked_register_value()

◆ ad719x_set_operating_mode()

◆ ad719x_set_register_value()

◆ ad719x_single_conversion()

◆ ad719x_sync_control()

◆ ad719x_temperature_read()

◆ ad719x_wait_rdy_go_low()