ad77681_iio.c File Reference

Implementation of AD7768-1 IIO application interfaces. More...

#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include "app_config.h"
#include "ad77681_iio.h"
#include "ad77681_user_config.h"
#include "ad77681_regs.h"
#include "ad77681_support.h"
#include "common.h"
#include "iio_trigger.h"
#include "no_os_error.h"
#include "no_os_util.h"

Include dependency graph for ad77681_iio.c:

Macros
#define	NUM_OF_IIO_DEVICES   1
#define	IIO_TRIGGER_NAME   "ad77681_iio_trigger"
#define	AD77681_NUM_CHANNELS   1
#define	BYTES_PER_SAMPLE   sizeof(uint32_t)
#define	CHN_STORAGE_BITS   (BYTES_PER_SAMPLE * 8)
#define	AD77681_SCALE_FACTOR   (1 << ADC_RESOLUTION)
#define	AD77681_DEFAULT_SCALE   ((((float)(AD77681_VOLTAGE_REF / 1000.00) * 2) / AD77681_SCALE_FACTOR) * 1000)
#define	AD77681_REG_MAX_ADDR   AD77681_REG_MCLK_COUNTER + 1
#define	SINGLE_MODE_CONV_STANDBY   6
#define	PERIODIC_MODE_CONV_STANDBY   7
#define	DATA_BUFFER_SIZE   (32768)

Functions
int	get_raw (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
	Getter/Setter for the raw attribute value. More...
int	set_raw (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
int	get_scale (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
	Getter/Setter for the scale attribute value. More...
int	set_scale (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
int	get_power_mode (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
	Getter/Setter for the power mode attribute value. More...
int	set_power_mode (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
int	get_conv_mode (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
	Getter/Setter for the conversion mode attribute value. More...
int	set_conv_mode (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
int	get_mclk_division (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
	Getter/Setter for the MCLK division attribute value. More...
int	set_mclk_division (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t id)
bool	debug_get_reg_value (uint8_t reg, uint8_t *Reg_add)
	Get the actual register address value from the list. More...
int32_t	debug_reg_read (void *dev, uint32_t reg, uint32_t *readval)
	Read the debug register value. More...
int32_t	debug_reg_write (void *dev, uint32_t reg, uint32_t writeval)
	Write into the debug register. More...
int32_t	iio_ad77681_trigger_handler (struct iio_device_data *iio_dev_data)
	Push data into IIO buffer when trigger handler IRQ is invoked. More...
int32_t	ad77681_iio_initialize (void)
	Initialize the IIO interface for AD7768-1 IIO device. More...
void	ad77681_iio_event_handler (void)
	Run the AD77681 IIO event handler. More...

Variables
struct ad77681_dev *	p_ad77681_dev_inst = NULL
struct ad77681_status_registers *	p_ad77681_stat_reg = NULL
struct iio_attribute	channel_input_attributes []
struct scan_type	chn_scan

Detailed Description

Implementation of AD7768-1 IIO application interfaces.

This module acts as an interface for AD7768-1 IIO application

Copyright (c) 2021-23 Analog Devices, Inc. All rights reserved.

This software is proprietary to Analog Devices, Inc. and its licensors. By using this software you agree to the terms of the associated Analog Devices Software License Agreement.

Macro Definition Documentation

AD77681_DEFAULT_SCALE

#define AD77681_DEFAULT_SCALE   ((((float)(AD77681_VOLTAGE_REF / 1000.00) * 2) / AD77681_SCALE_FACTOR) * 1000)

AD77681_NUM_CHANNELS

#define AD77681_NUM_CHANNELS   1

AD77681_REG_MAX_ADDR

#define AD77681_REG_MAX_ADDR   AD77681_REG_MCLK_COUNTER + 1

AD77681_SCALE_FACTOR

#define AD77681_SCALE_FACTOR   (1 << ADC_RESOLUTION)

BYTES_PER_SAMPLE

#define BYTES_PER_SAMPLE   sizeof(uint32_t)

CHN_STORAGE_BITS

#define CHN_STORAGE_BITS   (BYTES_PER_SAMPLE * 8)

DATA_BUFFER_SIZE

#define DATA_BUFFER_SIZE   (32768)

IIO_TRIGGER_NAME

#define IIO_TRIGGER_NAME   "ad77681_iio_trigger"

NUM_OF_IIO_DEVICES

#define NUM_OF_IIO_DEVICES   1

PERIODIC_MODE_CONV_STANDBY

#define PERIODIC_MODE_CONV_STANDBY   7

SINGLE_MODE_CONV_STANDBY

#define SINGLE_MODE_CONV_STANDBY   6

Function Documentation

ad77681_iio_event_handler()

void ad77681_iio_event_handler

(

void

)

Run the AD77681 IIO event handler.

Returns

none

This function monitors the new IIO client event

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ad77681_iio_initialize()

int32_t ad77681_iio_initialize

(

void

)

Initialize the IIO interface for AD7768-1 IIO device.

Returns

none

0 in case of success, negative error code otherwise

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debug_get_reg_value()

bool debug_get_reg_value	(	uint8_t	reg,
		uint8_t *	Reg_add
	)

Get the actual register address value from the list.

Parameters

reg-	Register address to read from
Reg_add	- actual value of Register address

Returns

true in case of success, false value otherwise

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debug_reg_read()

int32_t debug_reg_read	(	void *	dev,
		uint32_t	reg,
		uint32_t *	readval
	)

Read the debug register value.

Parameters

dev-	Pointer to IIO device instance
reg-	Register address to read from
readval-	Pointer to variable to read data into

Returns

0 in case of success, negative value otherwise

debug_reg_write()

int32_t debug_reg_write	(	void *	dev,
		uint32_t	reg,
		uint32_t	writeval
	)

Write into the debug register.

Parameters

dev-	Pointer to IIO device instance
reg-	Register address to write into
writeval-	Register value to write

Returns

0 in case of success, negative value otherwise

get_conv_mode()

int get_conv_mode	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Getter/Setter for the conversion mode attribute value.

Parameters

device-	pointer to IIO device structure
buf-	pointer to buffer holding attribute value
len-	length of buffer string data
channel-	pointer to IIO channel structure
id-	Attribute ID (optional)

Returns

Number of characters read/written

get_mclk_division()

int get_mclk_division	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Getter/Setter for the MCLK division attribute value.

Parameters

device-	pointer to IIO device structure
buf-	pointer to buffer holding attribute value
len-	length of buffer string data
channel-	pointer to IIO channel structure
id-	Attribute ID (optional)

Returns

Number of characters read/written

get_power_mode()

int get_power_mode	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Getter/Setter for the power mode attribute value.

Parameters

device-	pointer to IIO device structure
buf-	pointer to buffer holding attribute value
len-	length of buffer string data
channel-	pointer to IIO channel structure
id-	Attribute ID (optional)

Returns

Number of characters read/written

get_raw()

int get_raw	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Getter/Setter for the raw attribute value.

Parameters

device-	pointer to IIO device structure
buf-	pointer to buffer holding attribute value
len-	length of buffer string data
channel-	pointer to IIO channel structure
id-	Attribute ID (optional)

Returns

Number of characters read/written

get_scale()

int get_scale	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Getter/Setter for the scale attribute value.

Parameters

device-	pointer to IIO device structure
buf-	pointer to buffer holding attribute value
len-	length of buffer string data
channel-	pointer to IIO channel structure
id-	Attribute ID (optional)

Returns

Number of characters read/written

iio_ad77681_trigger_handler()

int32_t iio_ad77681_trigger_handler

(

struct iio_device_data *

iio_dev_data

)

Push data into IIO buffer when trigger handler IRQ is invoked.

Parameters

iio_dev_data[in]

- IIO device data instance

Returns

0 in case of success or negative value otherwise

set_conv_mode()

int set_conv_mode	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

set_mclk_division()

int set_mclk_division	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

set_power_mode()

int set_power_mode	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

set_raw()

int set_raw	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

set_scale()

int set_scale	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	id
	)

Variable Documentation

channel_input_attributes

struct iio_attribute channel_input_attributes[]

Initial value:

= {
    {
        .name = "raw",
        .show = get_raw,
        .store = set_raw,
    },
    {
        .name = "scale",
        .show = get_scale,
        .store = set_scale,
    },
 
    END_ATTRIBUTES_ARRAY
}

chn_scan

struct scan_type chn_scan

Initial value:

= {
    .sign = 's',
    .realbits = ADC_RESOLUTION,
    .storagebits = CHN_STORAGE_BITS,
    .shift = 0,
    .is_big_endian = false
}

p_ad77681_dev_inst

struct ad77681_dev* p_ad77681_dev_inst = NULL

p_ad77681_stat_reg

struct ad77681_status_registers* p_ad77681_stat_reg = NULL