iio_adc_demo.c File Reference

Implementation of iio_adc_demo. More...

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include "no_os_error.h"
#include "no_os_util.h"
#include "iio_adc_demo.h"
#include "iio.h"

Include dependency graph for iio_adc_demo.c:

Macros
#define	ADC_DEMO_ATTR(_name, _priv)
#define	IIO_DEMO_ADC_CHANNEL(_idx)

Functions
int	get_adc_demo_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	get attributes for adc.
int	set_adc_demo_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	set attributes for adc.
int	adc_submit_samples (struct iio_device_data *dev_data)
	function for reading samples from the device.
int	adc_demo_trigger_handler (struct iio_device_data *dev_data)
	Handles trigger: reads one data-set and writes it to the buffer.

Variables
struct scan_type	adc_scan_type
struct iio_attribute	adc_channel_attributes []
struct iio_attribute	iio_adc_global_attributes []
struct iio_device	adc_demo_iio_descriptor

Detailed Description

Implementation of iio_adc_demo.

Author

Andrei Drimbarean (andre.nosp@m.i.dr.nosp@m.imbar.nosp@m.ean@.nosp@m.analo.nosp@m.g.co.nosp@m.m)

Copyright 2021(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Macro Definition Documentation

ADC_DEMO_ATTR

#define ADC_DEMO_ATTR	(		_name,
			_priv )

Value:

    {\
    .name = _name,\
    .priv = _priv,\
    .show = get_adc_demo_attr,\
    .store = set_adc_demo_attr \
}

IIO_DEMO_ADC_CHANNEL

#define IIO_DEMO_ADC_CHANNEL

(

_idx

)

Value:

    {\
    .name = "adc_in_ch" # _idx,\
    .ch_type = IIO_VOLTAGE,\
    .channel = _idx,\
    .scan_index = _idx,\
    .indexed = true,\
    .scan_type = &adc_scan_type,\
    .attributes = adc_channel_attributes,\
    .ch_out = false,\
}

Function Documentation

adc_demo_trigger_handler()

int adc_demo_trigger_handler

(

struct iio_device_data *

dev_data

)

Handles trigger: reads one data-set and writes it to the buffer.

Parameters

dev_data

- The iio device data structure.

Returns

ret - Result of the handling procedure. In case of success, the size of the written data is returned.

adc_submit_samples()

int adc_submit_samples

(

struct iio_device_data *

dev_data

)

function for reading samples from the device.

Parameters

dev_data

- The iio device data structure.

Returns

the number of read samples.

get_adc_demo_attr()

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

get attributes for adc.

Parameters

device-	Physical instance of a iio_demo_device.
buf	- Where value is stored.
len	- Maximum length of value to be stored in buf.
channel	- Channel properties.
attr_id	- Attribute ID

Returns

Length of chars written in buf, or negative value on failure.

set_adc_demo_attr()

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

set attributes for adc.

Parameters

device	- Physical instance of a iio_demo_device.
buf	- Value to be written to attribute.
len	- Length of the data in "buf".
channel	- Channel properties.
attr_id	- Attribute ID

Returns

: Number of bytes written to device, or negative value on failure.

Variable Documentation

adc_channel_attributes

struct iio_attribute adc_channel_attributes[]

Initial value:

= {
    ADC_DEMO_ATTR("adc_channel_attr", ADC_CHANNEL_ATTR),
    END_ATTRIBUTES_ARRAY,
}

adc_demo_iio_descriptor

struct iio_device adc_demo_iio_descriptor

Initial value:

= {
    .num_ch = TOTAL_ADC_CHANNELS,
    .channels = iio_adc_channels,
    .attributes = iio_adc_global_attributes,
    .debug_attributes = NULL,
    .buffer_attributes = NULL,
    .pre_enable = update_adc_channels,
    .post_disable = close_adc_channels,
    .trigger_handler = adc_demo_trigger_handler,
    .submit = adc_submit_samples,
    .debug_reg_read = iio_adc_demo_reg_read,
    .debug_reg_write = iio_adc_demo_reg_write
}

adc_scan_type

struct scan_type adc_scan_type

Initial value:

= {
    .sign = 's',
    .realbits = 16,
    .storagebits = 16,
    .shift = 0,
    .is_big_endian = false
}

iio_adc_global_attributes

struct iio_attribute iio_adc_global_attributes[]

Initial value:

= {
    ADC_DEMO_ATTR("adc_global_attr", ADC_GLOBAL_ATTR),
    END_ATTRIBUTES_ARRAY,
}