Implementation of AD7768-1 Driver. More...

#include "stdio.h"
#include "stdlib.h"
#include "stdbool.h"
#include <string.h>
#include "ad77681.h"
#include "no_os_error.h"
#include "no_os_delay.h"
#include "no_os_alloc.h"

Include dependency graph for ad77681.c:

Functions
uint8_t	ad77681_compute_crc8 (uint8_t *data, uint8_t data_size, uint8_t init_val)

uint8_t	ad77681_compute_xor (uint8_t *data, uint8_t data_size, uint8_t init_val)

int32_t	ad77681_spi_reg_read (struct ad77681_dev dev, uint8_t reg_addr, uint8_t reg_data)

int32_t	ad77681_spi_reg_write (struct ad77681_dev *dev, uint8_t reg_addr, uint8_t reg_data)

int32_t	ad77681_spi_read_mask (struct ad77681_dev dev, uint8_t reg_addr, uint8_t mask, uint8_t data)

int32_t	ad77681_spi_write_mask (struct ad77681_dev *dev, uint8_t reg_addr, uint8_t mask, uint8_t data)

uint8_t	ad77681_get_rx_buf_len (struct ad77681_dev *dev)

uint8_t	ad77681_get_frame_byte (struct ad77681_dev *dev)

int32_t	ad77681_spi_read_adc_data (struct ad77681_dev dev, uint8_t adc_data, enum ad77681_data_read_mode mode)

int32_t	ad77681_CRC_status_handling (struct ad77681_dev dev, uint16_t data_buffer)

int32_t	ad77681_data_to_voltage (struct ad77681_dev dev, uint32_t raw_code, double *voltage)

int32_t	ad77681_update_sample_rate (struct ad77681_dev *dev)

int32_t	ad77681_SINC3_ODR (struct ad77681_dev dev, uint16_t sinc3_dec_reg, float sinc3_odr)

int32_t	ad77681_set_power_mode (struct ad77681_dev *dev, enum ad77681_power_mode mode)

int32_t	ad77681_set_mclk_div (struct ad77681_dev *dev, enum ad77681_mclk_div clk_div)

int32_t	ad77681_set_VCM_output (struct ad77681_dev *dev, enum ad77681_VCM_out VCM_out)

int32_t	ad77681_set_AINn_buffer (struct ad77681_dev *dev, enum ad77681_AINn_precharge AINn)

int32_t	ad77681_set_AINp_buffer (struct ad77681_dev *dev, enum ad77681_AINp_precharge AINp)

int32_t	ad77681_set_REFn_buffer (struct ad77681_dev *dev, enum ad77681_REFn_buffer REFn)

int32_t	ad77681_set_REFp_buffer (struct ad77681_dev *dev, enum ad77681_REFp_buffer REFp)

int32_t	ad77681_set_filter_type (struct ad77681_dev *dev, enum ad77681_sinc5_fir_decimate decimate, enum ad77681_filter_type filter, uint16_t sinc3_osr)

int32_t	ad77681_set_50HZ_rejection (struct ad77681_dev *dev, uint8_t enable)

int32_t	ad77681_set_continuos_read (struct ad77681_dev *dev, enum ad77681_continuous_read continuous_enable)

int32_t	ad77681_power_down (struct ad77681_dev *dev, enum ad77681_sleep_wake sleep_wake)

int32_t	ad77681_set_conv_mode (struct ad77681_dev *dev, enum ad77681_conv_mode conv_mode, enum ad77681_conv_diag_mux diag_mux_sel, bool conv_diag_sel)

int32_t	ad77681_set_convlen (struct ad77681_dev *dev, enum ad77681_conv_len conv_len)

int32_t	ad77681_set_crc_sel (struct ad77681_dev *dev, enum ad77681_crc_sel crc_sel)

int32_t	ad77681_set_status_bit (struct ad77681_dev *dev, bool status_bit)

int32_t	ad77681_soft_reset (struct ad77681_dev *dev)

int32_t	ad77681_initiate_sync (struct ad77681_dev *dev)

int32_t	ad77681_apply_offset (struct ad77681_dev *dev, uint32_t value)

int32_t	ad77681_apply_gain (struct ad77681_dev *dev, uint32_t value)

int32_t	ad77681_programmable_filter (struct ad77681_dev dev, const float coeffs, uint8_t num_coeffs)

int32_t	ad77681_gpio_read (struct ad77681_dev dev, uint8_t value, enum ad77681_gpios gpio_number)

int32_t	ad77681_gpio_write (struct ad77681_dev *dev, uint8_t value, enum ad77681_gpios gpio_number)

int32_t	ad77681_gpio_inout (struct ad77681_dev *dev, uint8_t direction, enum ad77681_gpios gpio_number)

int32_t	ad77681_global_gpio (struct ad77681_dev *dev, enum ad77681_gobal_gpio_enable gpio_enable)

int32_t	ad77681_scratchpad (struct ad77681_dev dev, uint8_t sequence)

int32_t	ad77681_gpio_open_drain (struct ad77681_dev *dev, enum ad77681_gpios gpio_number, enum ad77681_gpio_output_type output_type)

int32_t	ad77681_clear_error_flags (struct ad77681_dev *dev)

int32_t	ad77681_error_flags_enabe (struct ad77681_dev *dev)

int32_t	ad77681_status (struct ad77681_dev dev, struct ad77681_status_registers status)

int32_t	ad77681_setup (struct ad77681_dev device, struct ad77681_init_param init_param, struct ad77681_status_registers status)

Detailed Description

Implementation of AD7768-1 Driver.

Author: SPopa (stefa.nosp@m.n.po.nosp@m.pa@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.
The use of this software may or may not infringe the patent rights of one or more patent holders. This license does not release you from the requirement that you obtain separate licenses from these patent holders to use this software.
Use of the software either in source or binary form, must be run on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, 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

◆ ad77681_apply_gain()

int32_t ad77681_apply_gain	(	struct ad77681_dev *	dev,
		uint32_t	value
	)

Write to gain registers

Parameters

dev	- The device structure.
value	- The desired value of the whole 24-bit gain register

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

◆ ad77681_apply_offset()

int32_t ad77681_apply_offset	(	struct ad77681_dev *	dev,
		uint32_t	value
	)

Write to offset registers

Parameters

dev	The device structure.
value	The desired value of the whole 24-bit offset register

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

◆ ad77681_clear_error_flags()

int32_t ad77681_clear_error_flags ( struct ad77681_dev * dev )

Clear all error flags at once

Parameters

dev	- The device structure.

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

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◆ ad77681_compute_crc8()

uint8_t ad77681_compute_crc8	(	uint8_t *	data,
		uint8_t	data_size,
		uint8_t	init_val
	)

Compute CRC8 checksum.

Parameters

data	- The data buffer.
data_size	- The size of the data buffer.
init_val	- CRC initial value.

Returns: CRC8 checksum.

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◆ ad77681_compute_xor()

uint8_t ad77681_compute_xor	(	uint8_t *	data,
		uint8_t	data_size,
		uint8_t	init_val
	)

Compute XOR checksum.

Parameters

data	- The data buffer.
data_size	- The size of the data buffer.
init_val	- CRC initial value.

Returns: XOR checksum.

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◆ ad77681_CRC_status_handling()

int32_t ad77681_CRC_status_handling	(	struct ad77681_dev *	dev,
		uint16_t *	data_buffer
	)

CRC and status bit handling after each readout form the ADC

Parameters

dev	- The device structure.
*data_buffer	- 16-bit buffer readed from the ADC containing the CRC, data and the stattus bit.

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

◆ ad77681_data_to_voltage()

int32_t ad77681_data_to_voltage	(	struct ad77681_dev *	dev,
		uint32_t *	raw_code,
		double *	voltage
	)

Conversion from measured data to voltage

Parameters

dev	- The device structure.
raw_code	- ADC raw code measurements
voltage	- Converted ADC code to voltage

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

◆ ad77681_error_flags_enabe()

int32_t ad77681_error_flags_enabe ( struct ad77681_dev * dev )

Enabling error flags. All error flags enabled by default

Parameters

dev	- The device structure.

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

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◆ ad77681_get_frame_byte()

uint8_t ad77681_get_frame_byte ( struct ad77681_dev * dev )

Helper function to get the number of SPI 16bit frames for INTERRUPT ADC DATA READ

Parameters

dev	- The device structure.

Returns: frame_16bit - the number of 16 bit SPI frames

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◆ ad77681_get_rx_buf_len()

uint8_t ad77681_get_rx_buf_len ( struct ad77681_dev * dev )

Helper function to get the number of rx bytes

Parameters

dev	- The device structure.

Returns: rx_buf_len - the number of rx bytes

◆ ad77681_global_gpio()

int32_t ad77681_global_gpio	(	struct ad77681_dev *	dev,
		enum ad77681_gobal_gpio_enable	gpio_enable
	)

Enable global GPIO bit. This bit must be set high to change GPIO settings.

Parameters

dev	- The device structure.
gpio_enable	- Enable or diable the global GPIO pin Accepted values: AD77681_GLOBAL_GPIO_ENABLE AD77681_GLOBAL_GPIO_DISABLE

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

◆ ad77681_gpio_inout()

int32_t ad77681_gpio_inout	(	struct ad77681_dev *	dev,
		uint8_t	direction,
		enum ad77681_gpios	gpio_number
	)

Set AD7768-1s GPIO as input or output.

Parameters

dev	- The device structure.
direction	- Direction of the GPIO Accepted values: NO_OS_GPIO_IN NO_OS_GPIO_OUT 4-bit value for all gpios
gpio_number	- Number of GPIO, which will be affected Accepted values: AD77681_GPIO0 AD77681_GPIO1 AD77681_GPIO2 AD77681_GPIO3 AD77681_ALL_GPIOS

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

◆ ad77681_gpio_open_drain()

int32_t ad77681_gpio_open_drain	(	struct ad77681_dev *	dev,
		enum ad77681_gpios	gpio_number,
		enum ad77681_gpio_output_type	output_type
	)

Set AD7768-1s GPIO output type between strong driver and open drain. GPIO3 can not be accessed!

Parameters

dev	- The device structure.
gpio_number	- AD7768-1s GPIO to be affected (Only GPIO0, GPIO1 and GPIO2) Accepted values: AD77681_GPIO0 AD77681_GPIO1 AD77681_GPIO2 AD77681_ALL_GPIOS
output_type	- Output type of the GPIO Accepted values: AD77681_GPIO_STRONG_DRIVER AD77681_GPIO_OPEN_DRAIN

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

◆ ad77681_gpio_read()

int32_t ad77681_gpio_read	(	struct ad77681_dev *	dev,
		uint8_t *	value,
		enum ad77681_gpios	gpio_number
	)

Read value from GPIOs present in AD7768-1 separately, or all GPIOS at once.

Parameters

dev	- The device structure.
value	- Readed value.
gpio_number	- Number of GPIO, the value will be written into Accepted values: AD77681_GPIO0 AD77681_GPIO1 AD77681_GPIO2 AD77681_GPIO3 AD77681_ALL_GPIOS

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

◆ ad77681_gpio_write()

int32_t ad77681_gpio_write	(	struct ad77681_dev *	dev,
		uint8_t	value,
		enum ad77681_gpios	gpio_number
	)

Write value to GPIOs present in AD7768-1 separately, or all GPIOS at once.

Parameters

dev	- The device structure.
value	- Value to be written into GPIO Accepted values: NO_OS_GPIO_HIGH NO_OS_GPIO_LOW 4-bit value for all gpios
gpio_number	- Number of GPIO, the value will be written into Accepted values: AD77681_GPIO0 AD77681_GPIO1 AD77681_GPIO2 AD77681_GPIO3 AD77681_ALL_GPIOS

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

◆ ad77681_initiate_sync()

int32_t ad77681_initiate_sync ( struct ad77681_dev * dev )

Initiate a SYNC_OUT pulse over spi

Parameters

dev	- The device structure.

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

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◆ ad77681_power_down()

int32_t ad77681_power_down	(	struct ad77681_dev *	dev,
		enum ad77681_sleep_wake	sleep_wake
	)

Power down / power up the device

Parameters

dev	- The device structure.
sleep_wake	- Power down, or power up the ADC Accepted values: AD77681_SLEEP AD77681_WAKE

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

◆ ad77681_programmable_filter()

int32_t ad77681_programmable_filter	(	struct ad77681_dev *	dev,
		const float *	coeffs,
		uint8_t	num_coeffs
	)

Upload sequence for Programmamble FIR filter

Parameters

dev	- The device structure.
coeffs	- Pointer to the desired filter coefficients array to be written
num_coeffs	- Count of active filter coeffs

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

◆ ad77681_scratchpad()

int32_t ad77681_scratchpad	(	struct ad77681_dev *	dev,
		uint8_t *	sequence
	)

Read and write from ADC scratchpad register to check SPI Communication in the very beginning, during inicialization.

Parameters

dev	- The device structure.
sequence	- The sequence which will be written into scratchpad and the readed sequence will be returned

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

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◆ ad77681_set_50HZ_rejection()

int32_t ad77681_set_50HZ_rejection	(	struct ad77681_dev *	dev,
		uint8_t	enable
	)

Enable 50/60 Hz rejection

Parameters

dev	- The device structure.
enable	- The positive reference buffer selector Accepted values: true false

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

◆ ad77681_set_AINn_buffer()

int32_t ad77681_set_AINn_buffer	(	struct ad77681_dev *	dev,
		enum ad77681_AINn_precharge	AINn
	)

Set the AIN- precharge buffer.

Parameters

dev	- The device structure.
AINn	- The negative analog input precharge buffer selector Accepted values: AD77681_AINn_ENABLED AD77681_AINn_DISABLED

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

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◆ ad77681_set_AINp_buffer()

int32_t ad77681_set_AINp_buffer	(	struct ad77681_dev *	dev,
		enum ad77681_AINp_precharge	AINp
	)

Set the AIN+ precharge buffer.

Parameters

dev	- The device structure.
AINp	- The positive analog input precharge buffer selector Accepted values: AD77681_AINp_ENABLED AD77681_AINp_DISABLED

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

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◆ ad77681_set_continuos_read()

int32_t ad77681_set_continuos_read	(	struct ad77681_dev *	dev,
		enum ad77681_continuous_read	continuous_enable
	)

Set the REF- reference buffer

Parameters

dev	- The device structure.
continuous_enable	- Continous read enable Accepted values: AD77681_CONTINUOUS_READ_ENABLE AD77681_CONTINUOUS_READ_DISABLE

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

◆ ad77681_set_conv_mode()

int32_t ad77681_set_conv_mode	(	struct ad77681_dev *	dev,
		enum ad77681_conv_mode	conv_mode,
		enum ad77681_conv_diag_mux	diag_mux_sel,
		bool	conv_diag_sel
	)

Conversion mode and source select

Parameters

dev	- The device structure.
conv_mode	- Sets the conversion mode of the ADC Accepted values: AD77681_CONV_CONTINUOUS AD77681_CONV_ONE_SHOT AD77681_CONV_SINGLE AD77681_CONV_PERIODIC
diag_mux_sel	- Selects which signal to route through diagnostic mux Accepted values: AD77681_TEMP_SENSOR AD77681_AIN_SHORT AD77681_POSITIVE_FS AD77681_NEGATIVE_FS
conv_diag_sel	- Select the input for conversion as AIN or diagnostic mux Accepted values: true false

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

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◆ ad77681_set_convlen()

int32_t ad77681_set_convlen	(	struct ad77681_dev *	dev,
		enum ad77681_conv_len	conv_len
	)

Set the Conversion Result Output Length.

Parameters

dev	- The device structure.
conv_len	- The MCLK divider. Accepted values: AD77681_CONV_24BIT AD77681_CONV_16BIT

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

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◆ ad77681_set_crc_sel()

int32_t ad77681_set_crc_sel	(	struct ad77681_dev *	dev,
		enum ad77681_crc_sel	crc_sel
	)

Activates CRC on all SPI transactions and Selects CRC method as XOR or 8-bit polynomial

Parameters

dev	- The device structure.
crc_sel	- The CRC type. Accepted values: AD77681_CRC AD77681_XOR AD77681_NO_CRC

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

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◆ ad77681_set_filter_type()

int32_t ad77681_set_filter_type	(	struct ad77681_dev *	dev,
		enum ad77681_sinc5_fir_decimate	decimate,
		enum ad77681_filter_type	filter,
		uint16_t	sinc3_osr
	)

Set filter type and decimation ratio

Parameters

dev	- The device structure.
decimate	- Decimation ratio of filter Accepted values: AD77681_SINC5_FIR_DECx32 AD77681_SINC5_FIR_DECx64 AD77681_SINC5_FIR_DECx128 AD77681_SINC5_FIR_DECx256 AD77681_SINC5_FIR_DECx512 AD77681_SINC5_FIR_DECx1024
filter	- Select filter type Accepted values: AD77681_SINC5 AD77681_SINC5_DECx8 AD77681_SINC5_DECx16 AD77681_SINC3 AD77681_FIR
sinc3_osr	- Select decimation ratio for SINC3 filter separately as integer from 0 to 8192. See the AD7768-1 datasheet for more info

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

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◆ ad77681_set_mclk_div()

int32_t ad77681_set_mclk_div	(	struct ad77681_dev *	dev,
		enum ad77681_mclk_div	clk_div
	)

Set the MCLK divider.

Parameters

dev	- The device structure.
clk_div	- The MCLK divider. Accepted values: AD77681_MCLK_DIV_16 AD77681_MCLK_DIV_8 AD77681_MCLK_DIV_4 AD77681_MCLK_DIV_2

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

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◆ ad77681_set_power_mode()

int32_t ad77681_set_power_mode	(	struct ad77681_dev *	dev,
		enum ad77681_power_mode	mode
	)

Set the power consumption mode of the ADC core.

Parameters

dev	- The device structure.
mode	- The power mode. Accepted values: AD77681_ECO AD77681_MEDIAN AD77681_FAST

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

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◆ ad77681_set_REFn_buffer()

int32_t ad77681_set_REFn_buffer	(	struct ad77681_dev *	dev,
		enum ad77681_REFn_buffer	REFn
	)

Set the REF- reference buffer

Parameters

dev	- The device structure.
REFn	- The negative reference buffer selector Accepted values: AD77681_BUFn_DISABLED AD77681_BUFn_ENABLED AD77681_BUFn_FULL_BUFFER_ON

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

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◆ ad77681_set_REFp_buffer()

int32_t ad77681_set_REFp_buffer	(	struct ad77681_dev *	dev,
		enum ad77681_REFp_buffer	REFp
	)

Set the REF+ reference buffer

Parameters

dev	- The device structure.
REFp	- The positive reference buffer selector Accepted values: AD77681_BUFp_DISABLED AD77681_BUFp_ENABLED AD77681_BUFp_FULL_BUFFER_ON

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

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◆ ad77681_set_status_bit()

int32_t ad77681_set_status_bit	(	struct ad77681_dev *	dev,
		bool	status_bit
	)

Enables Status bits output

Parameters

dev	- The device structure.
status_bit	- enable or disable status bit Accepted values: true false

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

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◆ ad77681_set_VCM_output()

int32_t ad77681_set_VCM_output	(	struct ad77681_dev *	dev,
		enum ad77681_VCM_out	VCM_out
	)

Set the VCM output.

Parameters

dev	- The device structure.
VCM_out	- The VCM output voltage. Accepted values: AD77681_VCM_HALF_VCC AD77681_VCM_2_5V AD77681_VCM_2_05V AD77681_VCM_1_9V AD77681_VCM_1_65V AD77681_VCM_1_1V AD77681_VCM_0_9V AD77681_VCM_OFF

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

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◆ ad77681_setup()

int32_t ad77681_setup	(	struct ad77681_dev **	device,
		struct ad77681_init_param	init_param,
		struct ad77681_status_registers **	status
	)

Initialize the device.

Parameters

device	- The device structure.
init_param	- The structure that contains the device initial parameters.
status	- The structure that will contains the ADC status

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

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◆ ad77681_SINC3_ODR()

int32_t ad77681_SINC3_ODR	(	struct ad77681_dev *	dev,
		uint16_t *	sinc3_dec_reg,
		float	sinc3_odr
	)

Get SINC3 filter oversampling ratio register value based on user's inserted output data rate ODR

Parameters

dev	- The device structure.
sinc3_dec_reg	- Returned closest value of SINC3 register
sinc3_odr	- Desired output data rage

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

◆ ad77681_soft_reset()

int32_t ad77681_soft_reset ( struct ad77681_dev * dev )

Device reset over SPI.

Parameters

dev	- The device structure.

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

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◆ ad77681_spi_read_adc_data()

int32_t ad77681_spi_read_adc_data	(	struct ad77681_dev *	dev,
		uint8_t *	adc_data,
		enum ad77681_data_read_mode	mode
	)

Read conversion result from device.

Parameters

dev	- The device structure.
adc_data	- The conversion result data
mode	- Data read mode Accepted values: AD77681_REGISTER_DATA_READ AD77681_CONTINUOUS_DATA_READ

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

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◆ ad77681_spi_read_mask()

int32_t ad77681_spi_read_mask	(	struct ad77681_dev *	dev,
		uint8_t	reg_addr,
		uint8_t	mask,
		uint8_t *	data
	)

SPI read from device using a mask.

Parameters

dev	- The device structure.
reg_addr	- The register address.
mask	- The mask.
data	- The register data.

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

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◆ ad77681_spi_reg_read()

int32_t ad77681_spi_reg_read	(	struct ad77681_dev *	dev,
		uint8_t	reg_addr,
		uint8_t *	reg_data
	)

Read from device.

Parameters

dev	- The device structure.
reg_addr	- The register address.
reg_data	- The register data.

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

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◆ ad77681_spi_reg_write()

int32_t ad77681_spi_reg_write	(	struct ad77681_dev *	dev,
		uint8_t	reg_addr,
		uint8_t	reg_data
	)

Write to device.

Parameters

dev	- The device structure.
reg_addr	- The register address.
reg_data	- The register data.

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

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◆ ad77681_spi_write_mask()

int32_t ad77681_spi_write_mask	(	struct ad77681_dev *	dev,
		uint8_t	reg_addr,
		uint8_t	mask,
		uint8_t	data
	)

SPI write to device using a mask.

Parameters

dev	- The device structure.
reg_addr	- The register address.
mask	- The mask.
data	- The register data.

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

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◆ ad77681_status()

int32_t ad77681_status	(	struct ad77681_dev *	dev,
		struct ad77681_status_registers *	status
	)

Read from all ADC status registers

Parameters

dev	- The device structure.
status	- Structure with all satuts bits

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

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◆ ad77681_update_sample_rate()

int32_t ad77681_update_sample_rate ( struct ad77681_dev * dev )

Update ADCs sample rate depending on MCLK, MCLK_DIV and filter settings

Parameters

dev	- The device structure.

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

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Functions

Detailed Description

Function Documentation

◆ ad77681_apply_gain()

◆ ad77681_apply_offset()

◆ ad77681_clear_error_flags()

◆ ad77681_compute_crc8()

◆ ad77681_compute_xor()

◆ ad77681_CRC_status_handling()

◆ ad77681_data_to_voltage()

◆ ad77681_error_flags_enabe()

◆ ad77681_get_frame_byte()

◆ ad77681_get_rx_buf_len()

◆ ad77681_global_gpio()

◆ ad77681_gpio_inout()

◆ ad77681_gpio_open_drain()

◆ ad77681_gpio_read()

◆ ad77681_gpio_write()

◆ ad77681_initiate_sync()

◆ ad77681_power_down()

◆ ad77681_programmable_filter()

◆ ad77681_scratchpad()

◆ ad77681_set_50HZ_rejection()

◆ ad77681_set_AINn_buffer()

◆ ad77681_set_AINp_buffer()

◆ ad77681_set_continuos_read()

◆ ad77681_set_conv_mode()

◆ ad77681_set_convlen()

◆ ad77681_set_crc_sel()

◆ ad77681_set_filter_type()

◆ ad77681_set_mclk_div()

◆ ad77681_set_power_mode()

◆ ad77681_set_REFn_buffer()

◆ ad77681_set_REFp_buffer()

◆ ad77681_set_status_bit()

◆ ad77681_set_VCM_output()

◆ ad77681_setup()

◆ ad77681_SINC3_ODR()

◆ ad77681_soft_reset()

◆ ad77681_spi_read_adc_data()

◆ ad77681_spi_read_mask()

◆ ad77681_spi_reg_read()

◆ ad77681_spi_reg_write()

◆ ad77681_spi_write_mask()

◆ ad77681_status()

◆ ad77681_update_sample_rate()